Semiconductor MSM6684B 4,194,304-word 1-bit Serial Register

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Semiconductor MSM6684B 4,194,304-word 1-bit Serial Register

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E2D0035-39-21 Semiconductor
Semiconductor MSM6684B
4,194,304-word 1-bit Serial Register
This version: MSM6684B Feb. 1999 Previous version: May. 1997
GENERAL DESCRIPTION
MSM6684B serial register organized 4,194,304 words bit, characterized mediumspeed, power consumption operation. This device built-in internal address generation circuit allowing continuous serial read/write operation external clock input. Read/write operation causes internal address incremented automatically External address input enables addressing units 1024 words. Furthermore, refresh timer refresh address counter installed, which makes external refresh circuit unnecessary. addition, this configuration allows lower power consumption. device packaged 26/20-pin having width mil. well adapted storing much data means battery backup. combination with recording playback enables easy implementation solid recording playback system.
FEATURES
Configuration 4,194,304 Serial access operation Serial access time Serial read/write time current drain max. (VCC with data stored under standard conditions) Refresh operation self-refresh function supported. Wide operation voltage range Single Addressing Units 1024 words Process 0.45 double well CMOS process Package 26/20-pin plastic (SOJ26/20-P-300-1.27) (Product name MSM6684BJS)
Semiconductor
MSM6684B
BLOCK DIAGRAM
Refresh Timer
Decoder
Address Multiplexer
Refresh Address Counter
194, Data Register
Address Counter
Column Decoder
Control
Address Register Column Address Counter Timing Generator
DOUT
RWCK
Write Clock Generator
Semiconductor
CONFIGURATION (TOP VIEW)
TEST
RWCK TEST TEST TEST TEST
MSM6684B
TEST TEST
DOUT
connection 26/20-pin plastic
DESCRIPTION
Symbol TEST TEST RWCK DOUT Test input Test input Read/write clock Data input Ground Data output Write enable Chip select Transfer address strobe Serial address strobe Serial address data Power supply Description
Note TEST pins connected power supply. TEST referenced ground level.
Semiconductor
MSM6684B
ABSOLUTE MAXIMUM RATINGS
Parameter Voltage Output Short-Circuit Current Power Dissipation Operating Temperature Storage Temperature Symbol TSTG Condition Against Rating -1.0 +7.0 +150 Unit
RECOMMENDED OPERATING CONDITIONS
70°C) Parameter Supply Voltage Supply Voltage Input Voltage Input Voltage Symbol Min. -0.2 Typ. Max. +0.5 Unit
ELECTRICAL CHARACTERISTICS
characteristics
(VCC 70°C) Parameter Output Voltage Output Voltage Input Leakage Current Output Leakage Current Supply Current (Operation) Supply Current (Standby) Symbol ICC1 ICC2 Condition -0.5 tRWC Min. Max. Unit
Semiconductor characteristics
MSM6684B
(VCC 70°C) Parameter Read/Write Cycle Time Access Time Output Turn-off Delay Time Signal Rise Time RWCK Pre-charge Time RWCK Pulse Time Cycle Time Pre-charge Time Pulse Width Address Setup Time Adress Hold Time Setup Time RWCK Setup Time Pulse Width Read Instruction Setup Time Read Instruction Hold Time Write Instruction Setup Time Write Instruction Hold Time Write Instruction Pulse Width RWCK Read Time Data Setup Time Data Hold Time RWCK. Delay Time Symbol tRWC tACC tOFF tRWP tSSC tSAP tSAS tATS tTRS tTAS tRRS tRRH tWRS tWRH tRWL tRWD Min. 2,500 1,000 1,500 Max. 1,500 10,000 Units
Semiconductor
Read/write read/modify/write cycles
TIMING DIAGRAM
tRWC tTRS RWCK tSAS tSSC tSAP tRWP
tATS
tTAS
tRRS tRRH tRWD
tRWL tWRS tWRH
tACC tOFF
MSM6684B
DOUT
Semiconductor
MSM6684B
FUNCTIONS OPERATING MODES
Serial address input (SAD) used enter start address reading/writing. address specified units 1024 words. 1024 words address data entered through bits A12) serial data. 13th must dummy address, however. input level must either "L". Serial address strobe (SAS) This clock latching serial address data into internal register. Address transfer strobe (TAS) This input loading internal address counter with serial address data latched address register. Read/write clock (RWCK) This clock input reading writing information data register. trailing edge RWCK triggers internal operation. reading mode, information data register output DOUT pin. writing mode, data register loaded with information. leading edge RWCK, internal address counter incremented automatically Write enable (WE) This input selecting read mode, write mode, read-modify-write mode. When "H", read mode and, when "L", write mode When level lowered from with RWCK active, read-modify-write mode Data input (DIN) This entering write data. Information data input latched when trailing edge RWCK encountered write mode that encountered read/modify mode. Data output (DOUT) data output always provides high impedance long RWCK kept "H". When information read, output "L", information read until RWCK returns held. early write mode, output maintained high impedance, that, connect DOUT enables "I/O common operation". Chip selection (CS) This input disabling input pins. This allows more MSM6684B devices with data input output pins connected parallel. Test (TEST, TEST) TEST must always fixed TEST "H".
Semiconductor
MSM6684B
NOTES POWER-UP
MSM6684B built-in board bias generation inner power supply circuits. Thus, energization must followed pause period more internal circuit stabilization. Furthermore, TEST must brought concurrently with prior VCC, clock input pins TEST pins must brought concurrently with prior VCC. achieve proper operation internal circuits, initial pause above must followed minimum dummy read cycles with RWCK.
NOTES SUPPLY VOLTAGE VARIATION
When using MSM6684B, take precautions that supply voltage does vary over volt within period 1,000ms less active state.
Semiconductor
MSM6684B
PACKAGE DIMENSIONS
(Unit
SOJ26/20-P-300-1.27
Mirror finish
Package material Lead frame material treatment Solder plate thickness Package weight
Epoxy resin alloy Solder plating more 0.80 TYP.
Notes Mounting Surface Mount Type Package SOP, QFP, TSOP, TQFP, LQFP, SOJ, (PLCC), SHP, surface mount type packages, which very susceptible heat reflow mounting humidity absorbed storage. Therefore, before perform reflow mounting, contact Oki's responsible sales person product name, package name, number, package code desired mounting conditions (reflow method, temperature times).
E2Y0002-29-11
NOTICE
information contained herein change without notice owing product and/or technical improvements. Before using product, please make sure that information being referred up-to-date. outline action examples application circuits described herein have been chosen explanation standard action performance product. When planning product, please ensure that external conditions reflected actual circuit, assembly, program designs. When designing your product, please product below specified maximum ratings within specified operating ranges including, limited operating voltage, power dissipation, operating temperature. assumes responsibility liability whatsoever failure unusual unexpected operation resulting from misuse, neglect, improper installation, repair, alteration accident, improper handling, unusual physical electrical stress including, limited exposure parameters beyond specified maximum ratings operation outside specified operating range. Neither indemnity against license third party's industrial intellectual property right, etc. granted connection with product and/or information drawings contained herein. responsibility assumed infringement third party's right which result from thereof. products listed this document intended general electronics equipment commercial applications (e.g., office automation, communication equipment, measurement equipment, consumer electronics, etc.). These products authorized system application that requires special enhanced quality reliability characteristics system application where failure such system application result loss damage property, death injury humans. Such applications include, limited traffic automotive equipment, safety devices, aerospace equipment, nuclear power control, medical equipment, life-support systems. Certain products this document need government approval before they exported particular countries. purchaser assumes responsibility determining legality export these products will take appropriate necessary steps their expense these. part contents cotained herein reprinted reproduced without prior permission. MS-DOS registered trademark Microsoft Corporation.
Copyright 1999 Electric Industry Co., Ltd.
Printed Japan

Semiconductor MSM6684B 4,194,304-word 1-bit Serial Register

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