TM497GU8

4194304-WORD BY 8-BIT

DYNAMIC RAM MODULE

SMMS498A– APRIL 1994 – REVISED JUNE 1995

1

POST OFFICE BOX 1443

(SIMM) for Use With Sockets

Plastic Small-Outline J-Lead (SOJ)

Packages

32 ms (2048 Cycles)

Compatible

ACCESS

ACCESS ACCESS READ OR

TIME

TIME

TIME

WRITE

tRAC

tAA

tCAC

CYCLE

(MAX)

(MAX)

(MAX)

(MIN)

’497GU8-60

60 ns

30 ns

15 ns

110 ns

’497GU8-70

70 ns

35 ns

18 ns

130 ns

’497GU8-80

80 ns

40 ns

20 ns

150 ns

Data-In and Data-Out Lines

0

°C to 70°C

CAS-Before-RAS ( CBR ), RAS-Only, and

Hidden Refresh

description

The

TM497GU8

is

a

4M-byte

dynamic

random-access memory module organized as

4 194 304

× 8 bits in a 30-pin leadless single-in-line

memory module (SIMM).

The SIMM is composed of two TMS417400DJ,

4 194 304

× 4-bit dynamic RAMs in 24/26-lead

plastic small-outline J-lead (SOJ) packages

mounted on a substrate with decoupling capaci-

tors.

The TM497GU8 is available in the U single-sided,

leadless module for use with sockets and is

characterized for operation from 0

°C to 70°C.

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

PIN NOMENCLATURE

A0 – A10

Address Inputs

CAS

Column-Address Strobe

DQ1 – DQ8

Data In / Data Out

NC

No Internal Connection

RAS

Row-Address Strobe

VCC

5-V Supply

VSS

Ground

W

Write Enable

U SINGLE-IN-LINE PACKAGE

( TOP VIEW )

VCC

CAS

DQ1

A0

A1

DQ2

A2

A3

VSS

DQ3

A4

A5

DQ4

A6

A7

DQ5

A8

A9

A10

DQ6

W

VSS

DQ7

NC

DQ8

NC

RAS

NC

NC

VCC

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

Copyright

© 1995, Texas Instruments Incorporated