Datasheet > EDI8F32259C

EDI8F32259C

更新时间： 2022-04-23 23:00:11

品牌	Logo	应用领域
WEDC		/
页数	文件大小	规格书
8页	260K
描述
256Kx32 STATIC RAM CMOS, HIGH SPEED MODULE

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EDI8F32259C 数据手册

EDI8F32259C

White Electronic Designs

256Kx32 STATIC RAM CMOS, HIGH SPEED MODULE

FEATURES

DESCRIPTION

The EDI8F32259C is a high speed 8Mb Static RAM

module organized as 256K words by 32 bits. This module

is constructed from eight 256Kx4 Static RAMs in SOJ

packages on an epoxy laminate (FR4) board.

256Kx32 bit CMOS Static RAM

Access Times: 15, 20, and 25ns

Individual Byte Selects

Fully Static, No Clocks

TTL Compatible I/O

Four chip enables (EØ# - E3#) are used to independently

enable the four bytes. Reading or writing can be executed

on individual bytes or any combination of multiple bytes

through proper use of selects.

High Density Package with JEDEC Standard

Pinouts

The EDI8F32259C is offered in 72 pin ZIP/SIMM package

which enables eight megabits of memory to be placed in

less than 1.3 square inches of board space.

72 Pin SIMM No. 175 (Angle)

72 Pin ZIP No. 176

72 Pin SIMM, No. 354 (Straight)

All inputs and outputs are TTLcompatible and operate from

a single 5V supply. Fully asynchronous circuitry requires

no clocks or refreshing for operation and provides equal

access and cycle times for ease of use.

Single +5V (±10%) Supply Operation

The ZIP and SIMM modules contain four PD (Presence

Detect) pins which are used to identify module memory

density in applications where alternate modules can be

interchanged.

FIG. 1 PIN CONFIGURATIONS AND BLOCK DIAGRAM

PIN NAMES

E4#

E3#

PD3

PD4

V_SS

AØ-A17

EØ#-E3#

Address Inputs

Chip Enables

Write Enables

Output Enable

A17

A16

PD1

PD2

DQ0

DQ8

DQ1

DQ9

DQ2

DQ10

DQ3

DQ11

V_CC

V_SS

DQ24

DQ16

DQ25

DQ17

DQ26

DQ18

DQ27

DQ19

DQØ-DQ31 Common Data Input/Output

V_CC

V_SS

Power (+5V±10%)

Ground

A10

A11

A0 - A17

A12

V_CC

A13

DQ12

DQ4

DQ13

DQ5

DQ14

DQ6

DQ15

DQ7

V_SS

256K

X 4

256K

X 4

DQ4 - DQ7

DQ0 - DQ3

DQ20

DQ28

DQ21

DQ29

DQ22

DQ30

DQ23

DQ31

V_SS

E0#

256K

X 4

256K

X 4

DQ8 - DQ11

DQ16 - DQ19

DQ24 - DQ27

DQ12 - DQ15

DQ20 - DQ23

DQ28 - DQ31

E1#

E2#

256K

X 4

256K

X 4

A15

A14

E2#

E1#

256K

X 4

256K

X 4

PD 1,2 = V_SS

PD 3,4 = Open

E3#

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

August 2006

Rev. 3

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

12 3 4 5 6 7 8

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