MCM72JG32 Datasheet, PDF (1/16 Pages) Motorola, Inc – 256KB and 512KB Pipelined BurstRAM Secondary Cache Module for Pentium

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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