Datasheet > TM497EU9

TM497EU9

更新时间： 2022-11-26 04:34:05

品牌	Logo	应用领域
德州仪器 - TI		/
页数	文件大小	规格书
7页	90K
描述
4194304-WORD BY 9-BIT DYNAMIC RAM MODULE

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TM497EU9 数据手册

TM497EU9

4194304-WORD BY 9-BIT

DYNAMIC RAM MODULE

SMMS499A – FEBRUARY 1994 – REVISED JUNE 1995

Organization . . . 4194304 × 9

U SINGLE-IN-LINE PACKAGE

(TOP VIEW)

Single 5-V Power Supply (±10% Tolerance)

30-Pin Single-In-Line Memory Module

(SIMM) for Use With Sockets

Utilizes One 4-Megabit and Two 16-Megabit

Dynamic RAMs in Plastic Small-Outline

J-Lead (SOJ) Packages

CAS

DQ1

Long Refresh Period

DQ2

†

32 ms (2048 Cycles)

All Inputs, Outputs, and Clocks Fully TTL

Compatible

DQ3 10

A4 11

3-State Outputs

A5 12

DQ4 13

A6 14

A7 15

DQ5 16

A8 17

A9 18

A10 19

DQ6 20

DQ7 23

NC 24

Performance Ranges:

ACCESS ACCESS ACCESS READ OR

TIME

(MAX)

60 ns

70 ns

80 ns

TIME

(t )

CAC

(MAX)

15 ns

18 ns

20 ns

WRITE

CYCLE

(MIN)

110 ns

130 ns

150 ns

)

RAC

(AA)

(MAX)

30 ns

35 ns

40 ns

’497EU9-60

’497EU9-70

’497EU9-80

Common CAS Control for Eight Common

Data-In and Data-Out Lines

Separate CAS Control for One Separate

Pair of Data-In and Data-Out Lines

DQ8 25

Q9 26

RAS 27

CAS9 28

D9 29

Low Power Dissipation

Operating Free-Air Temperature Range

0°C to 70°C

Enhanced Page Mode Operation With

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

Hidden Refresh

description

PIN NOMENCLATURE

The TM497EU9 is

4M-byte dynamic

random-access memory (RAM) organized as

4194304 × 9 bits [bit nine (D9, Q9) is generally

used for parity and is controlled by CAS9] in a

30-pin leadless single-in-line memory module

(SIMM). The SIMM is composed of two

TMS417400DJ, 4194304 × 4-bit dynamic RAMs,

each in a 24/26-lead plastic small-outline J-lead

(SOJ) package, and one TMS44100DJ, 4194304

× 1-bit dynamic RAM in a 20/26-lead plastic SOJ

package, mounted on a substrate with decoupling

capacitors.

A0–A10

Address Inputs

CAS, CAS9

DQ1–DQ8

Column-Address Strobe

Data In/Data Out

Data In

No Connection

Data Out

RAS

Row-Address Strobe

5-V Supply

Ground

Write Enable

The TM497EU9 is available in the U single-sided, leadless module for use with sockets and is characterized

for operation from 0°C to 70°C.

†

A0–A9 address lines must be refreshed every 16 ms.

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.

POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443

12 3 4 5 6 7

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