MCM64AF32

1

MOTOROLA FAST SRAM

Product Preview

256K Asynchronous Secondary

Cache Module for Pentium

™

The MCM64AF32 is designed to provide 256K of asynchronous L2 cache for

the Pentium microprocessor in conjunction with Intel’s Triton chip set. The mod-

ule is configured as 32K x 64 bits in a 160 pin card edge connector. The module

uses eight Motorola 3.3 V 32K x 8 FSRAMs for the cache memory, one Motorola

5 V 32K x 8 FSRAM for the tag RAM, and an upper order address latch.

Eight write enables are provided for byte write control.

PD0–PD4 identify density and functionality.

This cache module is plug and pin compatible with the other members of

Motorola’s Triton chip set module family, the MCM72JG32SG66 (a 256K byte

pipelined BurstRAM module) and the MCM72JG64SG66 (a 512K byte pipelined

BurstRAM module).

• Low–Cost Asynchronous Solution for Triton Chip Set

• All Cache Data Inputs and Outputs are LVTTL (3.3 V I/O) Compatible

• All Tag I/Os are TTL Compatible

• Byte Write Capability

• Fast SRAM Access Times:15 ns for Data RAMs and Tag RAM

• Decoupling Capacitors for each Fast Static RAM and Logic Device

• High Quality Multi–Layer FR4 PWB With Separate Power and Ground

Planes

• 160 Pin Card Edge Module

• Burndy Connector, Part Number: CELP2X80SC3Z48

BurstRAM is a trademark of Motorola.

Pentium is a trademark of Intel Corp.

This document contains information on a product under development. Motorola reserves the right to change or discontinue this product without notice.

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by MCM64AF32/D

MOTOROLA

SEMICONDUCTOR TECHNICAL DATA

* SEE CHAPTER 9 FOR PRELIMINARY

CASE OUTLINE.

MCM64AF32

160–LEAD

CARD EDGE

CASE TBD*

TOP VIEW

80

43

42

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* SEE BACK PAGE FOR PRELIMINARY

CASE OUTLINE.

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