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MCM72FB8ML

更新时间： 2024-09-29 22:51:23

品牌	Logo	应用领域
摩托罗拉 - MOTOROLA		脉冲
页数	文件大小	规格书
20页	256K
描述
256K x 72 Bit Burst RAM Multichip Module

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MCM72FB8ML 数据手册

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SEMICONDUCTOR TECHNICAL DATA

MCM72FB8ML

MCM72PB8ML

Advance Information

256K x 72 Bit BurstRAM

Multichip Module

MULTICHIP MODULE

PBGA

The256Kx72multichipmoduleusesfour4MbitsynchronousfaststaticRAMs

designed to provide a burstable, high performance, secondary cache for the

PowerPC and other high performance microprocessors. It is organized as

256K words of 72 bits each. This device integrates input registers, an output reg-

ister (MCM72PB8ML only), a 2–bit address counter, and high speed SRAM onto

a single monolithic circuit for reduced parts count in cache data RAM applica-

tions. Synchronous design allows precise cycle control with the use of an exter-

nal clock (K). BiCMOS circuitry reduces the overall power consumption of the

integrated functions for greater reliability.

CASE 1103B–01

Addresses (SA), data inputs (DQx), and all control signals except output

enable(G) and linear burst order (LBO) are clock (K) controlled through positive–

edge–triggered noninverting registers.

Bursts can be initiated with either ADSP or ADSC input pins. Subsequent burst

addresses can be generated internally (burst sequence operates in linear or

interleaved mode dependent upon the state of LBO) and controlled by the burst

address advance (ADV) input pin.

PIN A1

INDICATION

(corner without

fiducial)

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

clock (K) input. This feature eliminates complex off–chip write pulse generation

and provides increased timing flexibility for incoming signals.

Synchronous byte write (SBx), synchronous global write (SGW), and synchro-

nous write enable (SW) are provided to allow writes to either individual bytes or

to all bytes. The eight bytes are designated as “a” through “h”. SBa controls DQa,

SBb controls DQb, etc. Individual bytes are written if the selected byte writes SBx

are asserted with SW. All bytes are written if either SGW is asserted or if all SBx

and SW are asserted.

TOP VIEW

The module can be configured as either a pipelined or flow–through SRAM.

For read cycles, pipelined SRAMs output data is temporarily stored by an edge–

triggered output register and then released to the output buffers at the next rising

edge of clock (K). Flow–through SRAMs allow output to simply flow freely from

the memory array.

The multichip module operates from a 3.3 V core power supply and all outputs

operate on a separate 2.5 V or 3.3 V power supply. All inputs and outputs are

JEDEC standard JESD8–5 compatible.

•

3.3 V + 10%, – 5% Core Power Supply, 2.5 V or 3.3 V I/O Supply

ADSP, ADSC, and ADV Burst Control Pins

Option for Pipeline or Flow–Through (Speeds Guaranteed When Module is

Purchased by Appropriate Part Number)

Selectable Burst Sequencing Order (Linear/Interleaved)

Single–Cycle Deselect Timing

Internally Self–Timed Write Cycle

Byte Write and Global Write Control

JEDEC BGA Pin Assignment

PIN A1

INDICATION

BOTTOM VIEW

(corner with

fiducial)

(Drawings Not to Scale)

•

The PowerPC name is a trademark of IBM Corp., used under license therefrom.

This document contains information on a new product. Specifications and information herein are subject to change without notice.

REV 1

7/30/97

Motorola, Inc. 1997

MOTOROLA FAST SRAM

MCM72FB8ML MCM72PB8ML

12 3 4 5 6 7...20

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与MCM72FB8ML相关器件

型号	品牌	获取价格	描述	数据表
MCM72FB8ML7.5	MOTOROLA	获取价格	256K x 72 Bit Burst RAM Multichip Module
MCM72FB8ML7.5R	MOTOROLA	获取价格	256K x 72 Bit Burst RAM Multichip Module
MCM72FB8ML8	MOTOROLA	获取价格	256K x 72 Bit Burst RAM Multichip Module
MCM72FB8ML8R	MOTOROLA	获取价格	256K x 72 Bit Burst RAM Multichip Module
MCM72JG32	MOTOROLA	获取价格	256KB and 512KB Pipelined BurstRAM Secondary Cache Module for Pentium
MCM72JG32SG66	MOTOROLA	获取价格	256KB and 512KB Pipelined BurstRAM Secondary Cache Module for Pentium
MCM72JG64SG66	MOTOROLA	获取价格	256KB and 512KB Pipelined BurstRAM Secondary Cache Module for Pentium
MCM72MS32SG50	MOTOROLA	获取价格	32KX72 CACHE SRAM MODULE, 14ns, DMA136
MCM72MS32SG60	MOTOROLA	获取价格	32KX72 CACHE SRAM MODULE, 11ns, DMA136
MCM72MS32SG66	MOTOROLA	获取价格	32KX72 CACHE SRAM MODULE, 9ns, DMA136

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