Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsibility

for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result

from its use. No licence is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics.

Specifications mentioned in this publication are subject to change without noti ce. This publication supersedes and replaces all

information previously supplied. SGS-THOMSON Microelectronics products are not authorized for use as critical components in life

support devices or systems without express written approval of SGS-THOMSON Microelectronics.

© 1994 SGS-THOMSON Microelectronics - All Rights Reserved

Purchase of I

I

the I

SGS-THOMSON Microelectronics GROUP OF COMPANIES

Australia - Brazil - China - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco

The Netherlands - Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A.

40

b2

e

D

e3

b1

E

21

1

20

b

PACKAGE MECHANICAL DATA

40 PINS - PLASTIC DIP

Dimensions

Millimeters

Inches

Min.

Typ.

Max.

Min.

Typ.

Max.

a1

0.63

0.025

b

0.45

0.018

b1

0.23

0.31

0.009

0.012

b2

1.27

0.050

D

52.58

2.070

E

15.2

16.68

0.598

0.657

e

2.54

0.100

e3

48.26

1.900

F

14.1

0.555

i

4.445

0.175

L

3.3

0.130

M491B

16/16