EDI88257LP Просмотр технического описания (PDF) - White Electronic Designs => Micro Semi

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EDI88257LP

256Kx8 Monolithic SRAM

White Electronic Designs => Micro Semi 

256Kx8 Monolithic SRAM

FEATURES

s 256Kx8 CMOS Static

s Random Access Memory

• Access Times of 70, 85, 100ns

• Data Retention Function (LP Versions)

• TTL Compatible Inputs and Outputs

• Fully Static, No Clocks

s JEDEC Approved Pinout

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

s Single +5V (±10%) Supply Operation

FIG. 1 PIN CONFIGURATION

32 DIP

TOP VIEW

NC 1

A16 2

A14 3

A12 4

A7 5

A6 6

A5 7

A4 8

A3 9

A2 10

A1 11

AØ 12

DQØ 13

DQ1 14

DQ2 15

VSS 16

32 VCC

31 A15

30 A17

29 W

28 A13

27 A8

26 A9

25 A11

24 G

23 A10

22 E

21 DQ7

20 DQ6

19 DQ5

18 DQ4

17 DQ3

AØ-17

W

E

G

EDI88257C

HI-RELIABILITY PRODUCT

The EDI88257C is a 2 Megabit 256Kx8 bit Monolithic CMOS Static

RAM.

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.

A Low Power version, EDI88257LP, offers a data retention func-

tion for battery back-up opperation. Military product is available

compliant to Appendix A of MIL-PRF-38535.

BLOCK DIAGRAM

Memory Array

PIN DESCRIPTION

A0-17

W

E

G

DQ0-7

VCC

VSS

NC

Address Inputs

Write Enable

Chip Enable

Output Enable

Data Inputs/Outputs

Power (+5V ±10%)

Ground

Not Connected

Address

Buffer

Address

Decoder

I/O

Circuits

DQØ-7

September 1999 Rev. 2

1

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

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