PDM4M4040S15M Ver la hoja de datos (PDF) - Paradigm Technology

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PDM4M4040S15M

128K x 32 CMOS Static RAM Module

Paradigm Technology 

Features

n High density 4 megabit Static RAM module

n Low profile 64-pin ZIP (Zig-zag In-line vertical

Package) or 64-pin SIMM (Single In-line Memory

Module)

n Fast access time: 12 ns (max.)

n Surface mounted plastic components on an epoxy

laminate (FR-4) substrate

n Single 5V (±10%) power supply

n Multiple VSS pins and decoupling capacitors for

maximum noise immunity

n Inputs/outputs directly TTL compatible

PDM4M4040

128K x 32 CMOS

Static RAM Module

1

Description

2 The PDM4M4040 is a 128K x 32 static RAM module

constructed on an epoxy laminate (FR-4) substrate

using four 128K x 8 static RAMs in plastic SOJ pack-

ages. The PDM4M4040 is available with access times

as fast as 12 ns with minimal power consumption.

3

The PDM4M4040 is packaged in a 64-pin FR-4 ZIP

(Zig-zag In- line vertical Package) or a 64-pin SIMM

(Single In-line Memory Module). The ZIP

4 configuration allows 64 pins to be placed on a

package 3.65” long and 0.21” wide. At only 0.60”

high, this low-profile package is ideal for systems

with minimum board spacing. The SIMM

5 configuration allows use of edge mounted sockets to

secure the module.

All inputs and outputs of the PDM4M4040 are TTL

6 compatible and operate from a single 5V supply. Full

asynchronous circuitry requires no clock or refresh for

operation and provides equal access and cycle times

for ease of use.

7

Functional Block Diagram

CS1 CS2 CS3 CS4

17

ADDRESS

WE

OE

128K x 32

RAM

8

8

8

8

I/O31-I/O0

8

9

10

11

12

Rev 2.2 -1/15/96

8-35

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