Datasheet > EDI88257LPXCI

EDI88257LPXCI

更新时间： 2022-04-23 23:00:11

品牌	Logo	应用领域
WEDC		静态存储器
页数	文件大小	规格书
6页	285K
描述
256Kx8 Monolithic SRAM

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EDI88257LPXCI 数据手册

EDI88257C

White Electronic Designs

256Kx8 Monolithic SRAM

FEATURES

ꢀ

256Kx8 CMOS Static

The EDI88257C is a 2 Megabit 256Kx8 bit Monolithic

CMOS Static RAM.

ꢀ

Random Access Memory

The 32 pin DIP pinout adheres to the JEDEC standard for

the two megabit device, and is a pin replacement for the

256Kx8 module, EDI88257C. The device is upgradeable

to the 512Kx8 SRAM, the EDI88512C. Pin 1 becomes the

higher order address.

• Access Times of 70, 85, 100ns

• Data Retention Function (LP Versions)

• TTL Compatible Inputs and Outputs

• Fully Static, No Clocks

ALow Power version, EDI88257LP, offers a data retention

function for battery back-up opperation. Military product is

available compliant to Appendix A of MIL-PRF-38535.

ꢀ

JEDEC Approved Pinout

• 32 pin Ceramic DIP, 0.6 mils wide (Package 9)

Single +5V ( 10ꢀ) Supply Operation

■

FIGURE 1 – PIN CONFIGURATION

32 DIP

TOP VIEW

PIN DESCRIPTION

A0-17

Address Inputs

Write Enable

A16

A14

A12

A2 10

A1 11

A0 12

DQ0 13

DQ1 14

DQ2 15

V_SS16

32 V_CC

31 A15

30 A17

29 W#

28 A13

27 A8

Chip Enable

Output Enable

Data Inputs/Outputs

Power (+5V 10ꢀ%

Ground

DQ0-7

V_CC

V_SS

26 A9

25 A11

24 G#

23 A10

22 E#

21 I/O7

20 I/O6

19 I/O5

18 I/O4

17 I/O3

Not Connected

BLOCK DIAGRAM

Memory Array

Address

Buffer

Address

Decoder

I/O

Circuits

A0-17

DQ0-7

White Electronic Designs Corp. reserves the right to change products or speciﬁcations without notice.

September 1999

Rev. 2

White Electronic Designs Corporation • (602) 437-1520 • www.wedc.com

12 3 4 5 6

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