MCM72JG32 View Datasheet(PDF) - Motorola => Freescale

Part Name

Description

Manufacturer

MCM72JG32

256K and 512K Pipelined BurstRAM™ Sedcondary Cache Module for Pentium™

Motorola => Freescale 

MOTOROLA

SEMICONDUCTOR TECHNICAL DATA

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Advance Information

256K and 512K Pipelined

BurstRAM™ Sedcondary Cache

Module for Pentium™

The MCM72JG32 and MCM72JG64 are designed to provide a burstable, high

performance, 256K/512K L2 cache for the Pentium microprocessor in conjunc-

tion with Intel’s Triton chip set. The modules are configured as 32K x 64 and

64K x 64 bits in a 160 pin card edge memory module. Each module uses four of

Motorola’s 5 V 32K x 18 or 64K x 18 BurstRAMs and one Motorola 5 V 32K x 8

FSRAM for the tag RAM.

Bursts can be initiated with either address status processor (ADSP) or cache

address status (CADS). Subsequent burst addresses are generated internal to

the BurstRAM by the cache burst advance (CADV) input pin.

Write cycles are internally self timed and are initiated by the rising edge of the

clock (CLK0, CLK1) input. Eight write enables are provided for byte write control.

PD0 – PD4 map into the Triton chip set for auto–configuration of the cache

control.

Module family pinout supports 5 V and 3.3 V components. It is recommended

that all power supplies be connected.

These cache modules are plug and pin compatible with the

MCM64AF32SG15, a 256K byte asynchronous module also designed for the

Pentium microprocessor in conjunction with Intel’s Triton chip set.

• Pentium–Style Burst Counter on Chip

• Pipelined Data Out

• 160 Pin Card Edge Module

• Address Pipeline Supported by ADSP Disabled with Ex

• All Cache Data and Tag I/Os are TTL Compatible

• Three State Outputs

• Byte Write Capability

• Fast Module Clock Rates: 66 MHz

• Fast SRAM Access Times:15 ns for Tag RAM

9 ns for Data RAMs

• Decoupling Capacitors for Each Fast Static RAM

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

Planes

• I/Os are 3.3 V Compatible on Data RAMs

• Burndy Connector, Part Number: CELP2X80SC3Z48

• Series 20 Ω Resistors for Noise Immunity

MCM72JG32

MCM72JG64

160–LEAD CARD

EDGE

CASE 1113A–01

TOP VIEW

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BurstRAM is a trademark of Motorola.

Pentium is a trademark of Intel Corp.

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

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MCM72JG32•MCM72JG64

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