<PAGE>   1
 
                                                Filed Pursuant to Rule 424(b)(3)
                                                      Registration No. 333-47564
 
                                   PROSPECTUS
 
                                1,841,162 SHARES
 
                                 TERADYNE, INC.
 
                                  COMMON STOCK
 
                            ------------------------
 
     This prospectus is part of a registration statement that covers 1,841,162
shares of our common stock. The shares may be offered and sold from time to time
by certain selling stockholders of Teradyne, Inc. We will receive no proceeds
from the sale of the shares.
 
     Our shares are traded on the New York Stock Exchange under the symbol
"TER." On October 2, 2000, the last reported sale price of our common stock on
the New York Stock Exchange was $33.50 per share.
 
                            ------------------------
 
     INVESTING IN THE COMMON STOCK INVOLVES RISKS.  SEE "RISK FACTORS" BEGINNING
ON PAGE 6.
 
                            ------------------------
 
     THE SECURITIES AND EXCHANGE COMMISSION AND STATE SECURITIES REGULATORS HAVE
NOT APPROVED OR DISAPPROVED OF THESE SECURITIES, OR DETERMINED IF THIS
PROSPECTUS IS TRUTHFUL OR COMPLETE. ANY REPRESENTATION TO THE CONTRARY IS A
CRIMINAL OFFENSE.
 
                            ------------------------
 
                The date of this Prospectus is October 19, 2000.

<PAGE>   2
 
                             AVAILABLE INFORMATION
 
     We are subject to the informational requirements of the Securities Exchange
Act of 1934, as amended, and accordingly file reports, proxy statements and
other information with the Securities and Exchange Commission. Reports, proxy
statements and other information filed by Teradyne may be inspected and copied
at prescribed rates at the Public Reference Room maintained by the Commission at
450 Fifth Street, N.W., Room 1200, Washington, D.C. 20549. Information on the
operation of the Public Reference Room may be obtained by calling
1-800-SEC-0330. Our common stock is traded on the New York Stock Exchange.
 
     We have filed with the Securities and Exchange Commission a registration
statement on Form S-3 under the Securities Act of 1933, as amended, with respect
to the shares of our common stock offered by this prospectus. This prospectus
does not contain all information set forth in the registration statement,
certain parts of which are omitted in accordance with the rules and regulations
of the Securities and Exchange Commission. For further information regarding us
and the shares of our common stock offered, we refer you to the registration
statement and to the exhibits and schedules filed with it. Statements contained
in this prospectus regarding the contents of any agreement or other document
filed as an exhibit to the registration statement are necessarily summaries of
those documents, and in each instance we refer you to the copy of that document
filed as an exhibit to the registration statement for a more complete
description of the matters involved. The registration statement, including the
exhibits and schedules thereto, may be inspected at the public reference
facilities maintained by the Securities and Exchange Commission at 450 Fifth
Street, N.W., Room 1200, Washington, D.C. 20549 and copies of all or any part of
the registration statement may be obtained from that office upon payment of the
prescribed fees. In addition, the Securities and Exchange Commission maintains a
web site (http://www.sec.gov) that contains reports, proxy and information
statements and other information regarding registrants that file electronically
with the Securities and Exchange Commission.
 
     We will provide without charge to each person who is delivered a
prospectus, on written or oral request, a copy of any or all of the documents
incorporated by reference herein (other than exhibits to those documents unless
those exhibits are specifically incorporated by reference into those documents).
Requests for copies should be directed to Investor Relations, Teradyne, Inc.,
321 Harrison Avenue, Boston, Massachusetts 02118, Telephone: (617) 482-2700.
 
                                        2

<PAGE>   3
 
               INCORPORATION OF CERTAIN INFORMATION BY REFERENCE
 
     The following documents filed by us with the Securities and Exchange
Commission pursuant to the Exchange Act are incorporated in this prospectus by
reference:
 
     1. Teradyne's Annual Report on Form 10-K for the fiscal year ended December
        31, 1999 (File No. 001-06462).
 
     2. Teradyne's Quarterly Reports on Form 10-Q for the fiscal quarters ended
        April 2, 2000 and July 2, 2000 (both File No. 001-06462).
 
     All documents subsequently filed by us pursuant to Section 13(a), 13(c), 14
or 15(d) of the Exchange Act, prior to the termination of this offering, shall
be deemed incorporated by reference in this prospectus and made a part hereof
from the date of filing of those documents. Any statement contained in a
document incorporated or deemed incorporated by reference in this prospectus
shall be deemed modified or superseded for purposes of this prospectus to the
extent that a statement contained herein or in any other subsequently filed
document which also is or is deemed incorporated by reference herein or in any
prospectus supplement modifies or supersedes that statement. Any statement so
modified or superseded shall not be deemed, except as so modified or superseded,
to constitute a part of this prospectus.
 
                                        3

<PAGE>   4
 
                                 TERADYNE, INC.
 
     We design, manufacture, market and service test systems and related
software, as well as backplanes and associated connectors. We currently have
five principal products:
 
     - semiconductor test systems;
 
     - backplane connection systems;
 
     - circuit-board inspection and test systems;
 
     - broadband test systems; and
 
     - software test systems.
 
     Semiconductor Test Systems.  We produce semiconductor test systems for use
by electronic component manufacturers in the design and testing of a wide
variety of semiconductor products, including logic, memory, mixed signal, and
"system on a chip" integrated circuits. Semiconductor test systems are sold to
semiconductor manufacturers and subcontractors to the semiconductor industry.
Semiconductor manufacturers use our semiconductor test systems to:
 
     - measure product performance;
 
     - improve product quality;
 
     - shorten time to market;
 
     - enhance manufacturability;
 
     - conserve labor costs; and
 
     - increase production yields.
 
     Backplane Connection Systems.  The computer, communications, and
military/aerospace industries are the principal users of our backplane
connection systems. A backplane is an assembly into which printed circuit boards
are inserted that provides for the interconnection of electrical signals between
the circuit boards and the other elements of the system. We produce both printed
circuit and metal backplanes, along with mating circuit-board connectors. Our
backplane connection systems customers include makers of data storage systems,
telecommunications gear, and routers and servers. In addition, backplane
connection systems have a long-standing military/aerospace customer base.
 
     Circuit-board Inspection and Test Systems.  Electronic equipment
manufacturers use our circuit-board inspection and test systems for the design,
inspection and testing of circuit boards and other assemblies. We also sell
circuit-board inspection and test systems to customers across most sectors of
the electronics industry and to companies in other industries that use
electronic devices in high volume. Similar to semiconductor test systems, our
customers use their systems and related software to increase product
performance, to improve product quality, to shorten time to market, to enhance
manufacturability, to conserve labor costs, and to increase production yields.
 
     Broadband Test Systems.  Broadband test systems support communications
service providers' goals to sell and deploy more services sooner and improve the
efficiency of qualification, provisioning and customer care.
 
     Software Test Systems.  A number of industries use our software test
systems to test communications networks, computerized telecommunication systems,
and web based applications. In September 2000, we announced that we are
consolidating our software test units into a single company to be called
Empirix. The employees of Empirix and an outside investor group will
subsequently own a controlling position in the new company, and we will retain
an ownership position. The transaction is expected to be completed at the end of
the fourth quarter of 2000.
 
     We have sales and service offices throughout North America, Europe, the
Asia Pacific region, and Japan, as our customers outside the United States are
located primarily in those geographic areas. We sell in these
                                        4

<PAGE>   5
 
areas predominantly utilizing a direct sales force and substantially all of our
manufacturing activities are conducted in the United States.
 
     We were incorporated in Massachusetts in September 1960. Our principal
executive offices are located at 321 Harrison Avenue, Boston, Massachusetts
02118, and our telephone number is (617) 482-2700. Our web site is located at
www.teradyne.com. The information contained on our web site is not part of this
prospectus.
 
                                        5

<PAGE>   6
 
                                  RISK FACTORS
 
     You should carefully consider the following risks before investing in our
common stock. These are not the only risks that we face. Additional risks may
also impair our business operations. If any of the following risks come to
fruition, our business, results of operations or financial condition could be
materially adversely affected. In that case, the trading price of our common
stock could decline, and you may lose all or part of your investment. You should
also refer to the other information set forth or incorporated by reference in
this prospectus, including our financial statements and the accompanying notes.
 
     This prospectus contains certain "forward-looking statements" based on our
current expectations, assumptions, estimates and projections about our company
and our industry. These forward-looking statements involve risks and
uncertainties. Our actual results could differ materially from those anticipated
in the forward-looking statements as a result of many factors, as more fully
described in this section and elsewhere in the prospectus.
 
OUR SEMICONDUCTOR TESTING BUSINESS IS DEPENDENT ON THE CURRENT AND ANTICIPATED
MARKET FOR SEMICONDUCTORS, WHICH IS HIGHLY CYCLICAL.
 
     Our business and results of operations depend in significant part upon
capital expenditures of manufacturers of semiconductors, which in turn depend
upon the current and anticipated market demand for semiconductors and products
incorporating semiconductors. The semiconductor industry has been highly
cyclical with recurring periods of over supply, which often have had a severe
effect on the semiconductor industry's demand for test equipment, including
systems manufactured and marketed by us. We believe that the markets for newer
generations of semiconductors will also be subject to similar fluctuations. We
cannot assure that any future increase in semiconductor test systems sales or
bookings for a calendar quarter will be sustained in subsequent quarters. In
addition, any factor adversely affecting the semiconductor industry or
particular segments within the semiconductor industry may adversely affect our
business, financial condition and operating results.
 
IF WE EXPERIENCE CANCELLATIONS OR OUR CUSTOMERS FAIL TO PLACE NEW ORDERS BECAUSE
OF OUR CURRENT ORDER BACKLOG, IT WOULD HAVE AN ADVERSE EFFECT ON OUR RESULTS OF
OPERATIONS.
 
     We typically maintain a large multi-week order backlog. If we are unable to
fill these orders and meet customer delivery expectations, customers may cancel
existing orders or fail to place new orders in the future, which would have an
adverse effect on our revenues and results of operations. Factors that affect
our ability to meet customer delivery expectations include:
 
     - the availability of expanded manufacturing facilities;
 
     - our ability to attract and retain qualified manufacturing personnel to
       meet anticipated manufacturing levels;
 
     - the difficulties inherent in manufacturing highly complex products that
       have only recently been introduced; and
 
     - the availability of components, including semiconductor chips, which may
       be in short supply from time to time.
 
     In addition, we rely upon third-party contract manufacturers for certain
subsystems used in our products, and our ability to meet customer orders for
those products depends upon the timeliness and quality of the work performed by
these subcontractors, over whom we do not exercise any control.
 
IF WE ARE UNABLE TO PROTECT OUR INTELLECTUAL PROPERTY, WE MAY LOSE A VALUABLE
ASSET OR MAY INCUR COSTLY LITIGATION TO PROTECT OUR RIGHTS.
 
     Our products incorporate technology that we protect in several ways,
including patents, copyrights, and trade secrets. While we believe that our
patents, copyrights, and trade secrets have value, in general no single one is
in itself essential. At times we have been notified that we may be in violation
of patents held by others.
                                        6

<PAGE>   7
 
An assertion of patent infringement against us, if successful, could have a
material adverse effect on our ability to sell our products, or could require a
lengthy and expensive defense which could adversely affect our operating
results.
 
IF WE FAIL TO DEVELOP NEW TECHNOLOGIES TO ADAPT TO OUR CUSTOMERS' NEEDS AND IF
OUR CUSTOMERS FAIL TO ACCEPT OUR NEW PRODUCTS, IT WILL ADVERSELY AFFECT OUR
REVENUES.
 
     We believe that our technological position depends primarily on the
technical competence and creative ability of our engineers. Our development of
new technologies, commercialization of those technologies into products, and
market acceptance and customer demand for those products is critical to our
success. Successful product development and introduction depends upon a number
of factors, including:
 
     - new product selection;
 
     - development of competitive products by competitors;
 
     - timely and efficient completion of product design; and
 
     - timely and efficient implementation of manufacturing and assembly
       processes and product performance at customer locations.
 
INTENSE COMPETITION IN OUR INDUSTRY MAY AFFECT OUR REVENUES.
 
     We face substantial competition, throughout the world, in each of our
operating segments. Some of these competitors also have substantial financial
and other resources to pursue engineering, manufacturing, marketing and
distribution of their products. We also face competition from internal suppliers
at several of our customers. Some of our competitors have introduced or
announced new products with certain performance characteristics which may be
considered equal or superior to those we currently offer. We expect our
competitors to continue to improve the performance of their current products and
to introduce new products or new technologies that provide improved cost of
ownership and performance characteristics. New product introductions by
competitors could cause a decline in sales or loss of market acceptance of our
products. Moreover, increased competitive pressure could lead to intensified
price based competition, which could materially adversely affect our business,
financial condition and results of operations.
 
WE ARE SUBJECT TO RISKS OF OPERATING INTERNATIONALLY.
 
     We derive a significant portion of our total revenue from customers outside
the United States. Our international sales are subject to significant risks and
difficulties, including:
 
     - unexpected changes in legal and regulatory requirements and in policy
       changes affecting our markets;
 
     - changes in tariffs and exchange rates;
 
     - political and economic instability;
 
     - difficulties in accounts receivable collection;
 
     - difficulties in staffing and managing international operations; and
 
     - potentially adverse tax consequences.
 
     In addition, we generate a significant portion of our semiconductor test
systems revenue from customers operating in South Asian countries and Taiwan.
Although the economies of South Asian countries and Taiwan have stabilized to
some degree since mid fiscal 1998, if these economies deteriorate the negative
economic developments would increase the likelihood of either a direct or
indirect adverse impact on the our future operating results.
 
                                        7

<PAGE>   8
 
OUR OPERATING RESULTS ARE LIKELY TO FLUCTUATE SIGNIFICANTLY.
 
     Our quarterly and annual operating results are affected by a wide variety
of factors that could materially adversely affect revenues and profitability,
including:
 
     - competitive pressures on selling prices;
 
     - the timing and cancellation of customer orders;
 
     - changes in product mix;
 
     - our ability to introduce new products and technologies on a timely basis;
 
     - introduction of products and technologies by our competitors;
 
     - market acceptance of our and our competitors' products;
 
     - fulfilling backlog on a timely basis;
 
     - reliance on sole source suppliers;
 
     - potential retrofit costs;
 
     - the level of orders received which can be shipped in a quarter; and
 
     - the timing of investments in engineering and development.
 
     As a result of the foregoing and other factors, we have and may continue to
experience material fluctuations in future operating results on a quarterly or
annual basis which could materially and adversely affect our business, financial
condition, operating results and stock price.
 
                                        8

<PAGE>   9
 
                                USE OF PROCEEDS
 
     We will not receive any proceeds from the sale of shares by the selling
stockholders. See "Selling Stockholders" and "Plan of Distribution" described
below.
 
                              SELLING STOCKHOLDERS
 
     The following table sets forth, as of the date of the prospectus, the
number and percentage of shares of our common stock beneficially owned by each
of the selling stockholders prior to this offering and the maximum number of
shares that each selling stockholder, its transferees, distributees, pledgees,
donees or other successors in interest may offer and sell pursuant to this
prospectus. Since each of the selling stockholders may sell all, some or none of
its shares, we cannot estimate the actual number of shares of our common stock
that will be sold by such selling stockholder or the aggregate number or
percentage of shares of our common stock that such selling stockholder will own
upon completion of this offering. See "Plan of Distribution."
 
     The shares of our common stock offered under this prospectus may be offered
from time to time by and for the account of each of the selling stockholders.
 

<TABLE>
<CAPTION>
                                                           NUMBER AND PERCENTAGE
                                                           OF SHARES BENEFICIALLY         NUMBER OF
                                                         OWNED PRIOR TO OFFERING(1)         SHARES
                                                         --------------------------    OFFERED PURSUANT
                  SELLING STOCKHOLDER                      NUMBER       PERCENT(2)    TO THIS PROSPECTUS
                  -------------------                    ----------     -----------   ------------------
<S>                                                      <C>            <C>           <C>
Robert Herring, Sr.....................................  1,221,658(3)        *            1,221,658
Robert Herring, Jr.....................................    309,752(4)        *              309,752
Charles Herring........................................    309,752(5)        *              309,752
</TABLE>

 
---------------
* Less than 1%.
 
(1) Except as otherwise indicated, the persons named in the above table have
    sole voting and investment power with respect to all shares shown as
    beneficially owned by them. Beneficial ownership is determined in accordance
    with the rules of the Commission, and includes voting and investment power
    with respect to shares.
 
(2) Based upon 175,319,732 shares of our common stock outstanding as of October
    2, 2000.
 
(3) Includes 91,983 shares of our common stock that are held in escrow pursuant
    to the terms of an escrow agreement, dated as of August 15, 2000, by and
    among Teradyne, the selling stockholders, Herco Technology Corp., T-H
    Acquisition Corporation and the Chase Manhattan Bank (the "Herco Escrow
    Agreement") and 31,083 shares of our common stock that are held in escrow
    pursuant to the terms of an escrow agreement dated as of August 15, 2000, by
    and among Teradyne, Robert Herring, Sr., Perception Laminates, Inc., T-P
    Acquisition Corporation and the Chase Manhattan Bank (the "Perception Escrow
    Agreement"). Such shares may not be released from escrow and sold hereunder
    except in accordance with the terms and conditions of the respective escrow
    agreements.
 
(4) Includes 30,975 shares of our common stock that are held pursuant to the
    Herco Escrow Agreement. Such shares may not be released from escrow and sold
    hereunder except in accordance with the terms and conditions of the Herco
    Escrow Agreement.
 
(5) Includes 30,975 shares of our common stock that are held pursuant to the
    Herco Escrow Agreement. Such shares may not be released from escrow and sold
    hereunder except in accordance with the terms and conditions of the Herco
    Escrow Agreement.
 
     1,539,332 of the shares offered hereby were issued to the selling
stockholders in connection with our acquisition of all of the outstanding
capital stock of Herco Technology Corp. and the remaining 301,830 shares were
issued to one of the selling stockholders in connection with our acquisition of
all of the outstanding capital stock of Perception Laminates, Inc. Both
transactions occurred on August 15, 2000.
 
                                        9

<PAGE>   10
 
     Since our acquisition of Herco Technology Corp., Messrs. Robert Herring,
Jr. and Charles Herring have continued to be employed as managers of Herco, now
a wholly-owned subsidiary of Teradyne.
 
     Each of the selling stockholders represented to us that he was acquiring
his shares in the acquisition without any present intention of effecting a
distribution of those shares. In recognition of the fact, however, that each of
the selling stockholders may desire the ability to sell those shares of our
common stock he owns when he considers it appropriate, in connection with our
acquisition of Herco Technology Corp and Perception Laminates, Inc. we agreed to
file a registration statement with the Securities and Exchange Commission to
permit the public sale of the shares and to use our reasonable efforts to keep
the registration statement effective until the earlier of two years from the
effective date of the registration statement, and such time as all shares to be
registered hereunder are sold by the selling stockholders. We will prepare and
file such amendments and supplements to the registration statement as may be
necessary to keep it effective during such period.
 
                              PLAN OF DISTRIBUTION
 
     The shares of our common stock offered hereby may be sold from time to time
by the selling stockholders for their own account. We are responsible for the
expenses incurred in the registration of the shares, other than selling
discounts and commissions and stock transfer fees and taxes applicable to the
sale of the shares. In addition, we have agreed to indemnify the selling
stockholders against certain liabilities, including liabilities under the
Securities Act, and the selling stockholders have agreed to indemnify us against
certain liabilities, including liabilities under the Securities Act.
 
     The distribution of the shares by the selling stockholders is not currently
subject to any underwriting agreement. The shares covered by this prospectus may
be sold by the selling stockholders or their transferees, distributees,
pledgees, donees, or other successors in interest from time to time. Such sales
may be made at fixed prices that may be changed, at market prices prevailing at
the time of sale, at prices related to such prevailing market prices, or at
negotiated prices. Such sales may be effected in the over-the-counter market, on
the New York Stock Exchange, or on any exchange on which the shares may then be
listed. The shares may be sold by one or more of the following:
 
     - one or more block trades in which a broker or dealer so engaged will
       attempt to sell all or a portion of the shares held by the selling
       stockholders as agent but may position and resell a portion of the block
       as principal to facilitate the transaction;
 
     - purchases by a broker or dealer as principal and resale by such broker or
       dealer for its account pursuant to this prospectus;
 
     - ordinary brokerage transactions and transactions in which the broker
       solicits purchasers;
 
     - in negotiated transactions; and
 
     - through other means.
 
     The selling stockholders may effect these transactions by selling shares to
or through broker-dealers, and the broker-dealers will receive compensation in
negotiated amounts in the form of discounts, concessions, commissions or fees
from the selling stockholders and/or the purchasers of the shares for whom the
broker-dealers may act as agent or to whom they sell as principal, or both
(which compensation to a particular broker-dealer might be in excess of
customary commissions). These brokers or dealers, or the participating brokers
or dealers, and the selling stockholders may be deemed to be "underwriters"
within the meaning of the Securities Act, in connection with these sales, and
any commissions received by the broker-dealers may be deemed to be underwriting
compensation.
 
     We have informed the selling stockholders that the antimanipulation rules
under the Securities Exchange Act of 1934 (including, without limitation, Rule
10b-5 and Regulation M -- Rule 102) may apply to sales in the market and we will
furnish the selling stockholders upon request with a copy of these Rules. We
will also inform the selling stockholders of the need for delivery of copies of
this prospectus.
 
                                       10

<PAGE>   11
 
     Any shares of our common stock covered by the prospectus that qualify for
sale pursuant to Rule 144 under the Securities Act may be sold under Rule 144
rather than pursuant to this prospectus.
 
     We agreed to file a registration statement to register the resale of the
shares and to use our reasonable efforts to maintain the effectiveness of the
registration statement until the earlier of two years from the effective date of
this registration statement and the date on which no shares originally held by
the selling stockholders remain unsold.
 
     The selling stockholders are not restricted as to the price or prices at
which they may sell their shares. Sales of the shares at less than the market
price may depress the market price of our common stock. The selling stockholders
are not restricted as to the number of shares which may be sold at any one time,
and it is possible that a significant number of shares could be sold at the same
time.
 
     EquiServe L.P., 150 Royall Street, Canton, MA 02021 is the transfer agent
for our common stock.
 
                                       11

<PAGE>   12
 
                          DESCRIPTION OF COMMON STOCK
 
     Holders of common stock are entitled to one vote for each share held on all
matters submitted to a vote of stockholders. Since holders of common stock do
not have cumulative voting rights, the holders of more than 50% of our common
stock can elect all the directors if they so choose. Holders of common stock are
entitled to receive ratably dividends, if any, as may be declared by the board
of directors out of funds legally available for payment of dividends. Upon the
liquidation, dissolution or winding up of Teradyne, holders of common stock are
entitled to receive ratably the net assets of Teradyne available after the
payment of all debts and other liabilities of Teradyne. Holders of common stock
have no preemptive, subscription, redemption or conversion rights, nor are they
entitled to the benefit of any sinking fund.
 
                                 LEGAL MATTERS
 
     Certain legal matters with respect to the issuance of the shares offered
hereby will be passed upon for Teradyne, Inc. by Testa, Hurwitz & Thibeault,
LLP, Boston, Massachusetts. As of the date of this prospectus, certain attorneys
with the firm of Testa, Hurwitz & Thibeault, LLP beneficially own an aggregate
of 24,000 shares of our common stock. In addition, Richard J. Testa is a member
of the law firm Testa, Hurwitz & Thibeault, LLP and serves as Clerk of Teradyne
and on Teradyne's board of directors.
 
                                    EXPERTS
 
     The consolidated financial statements incorporated in this prospectus by
reference to the Annual Report on Form 10-K of Teradyne, Inc. for the year ended
December 31, 1999, have been so incorporated in reliance on the report of
PricewaterhouseCoopers LLP, independent accountants, given on the authority of
said firm as experts in auditing and accounting.
 
                  [REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]
 
                                       12

<PAGE>   13
 
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     YOU SHOULD RELY ONLY ON THE INFORMATION CONTAINED IN THIS PROSPECTUS. WE
HAVE NOT AUTHORIZED ANYONE TO PROVIDE YOU WITH INFORMATION DIFFERENT FROM THAT
CONTAINED IN THIS PROSPECTUS. THE SELLING STOCKHOLDERS ARE OFFERING TO SELL, AND
SEEKING OFFERS TO BUY, THE SECURITIES ONLY IN JURISDICTIONS WHERE OFFERS AND
SALES ARE PERMITTED. NEITHER THE DELIVERY OF THIS PROSPECTUS NOR ANY SALES MADE
HEREUNDER AFTER THE DATE OF THIS PROSPECTUS SHALL CREATE AN IMPLICATION
CONTAINED HEREIN OR THAT THE AFFAIRS OF TERADYNE HAVE NOT CHANGED SINCE THE DATE
HEREOF. IN THIS PROSPECTUS, REFERENCES TO "TERADYNE, INC.," "TERADYNE," "WE,"
"OUR" AND "US" REFER TO TERADYNE, INC.
 
                            ------------------------
 
                               TABLE OF CONTENTS
 

<TABLE>
<CAPTION>
                                        PAGE
                                        ----
<S>                                     <C>
Available Information.................    2
Incorporation of Certain Information
  by Reference........................    3
Teradyne, Inc.........................    4
Risk Factors..........................    6
Selling Stockholders..................    9
Plan of Distribution..................   10
Legal Matters.........................   12
Experts...............................   12
</TABLE>

 
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                                1,841,162 SHARES
 
                                 TERADYNE, INC.
 
                                  COMMON STOCK
 
                              --------------------
                                   PROSPECTUS
                              --------------------
 
                                OCTOBER 19, 2000
 
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