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E2D0095-19-22
Semiconductor MSM9894AL
Semiconductor 8M-bit Serial Voice Flash Memory
This version: Feb. 1999 MSM9894AL
GENERAL DESCRIPTION
The MSM9894AL is a 8Mb flash memory that operates at 2.7 V to 3.6 V. Since backup is not needed, the number of pins is small, and the chip is contained in a small-package 32-pin TSOP, the MSM9894AL is a flash memory suitable for applications such as handy terminals. In combination with Oki's recording/playback IC (MSM9888L/MSM9889L), a solid-state recording/ playback system can be easily constructed.
FEATURES
* Small page size (one time write unit) * Configuration * Power supply voltage * Operating current : 2,112 bits per page
: 4096 pages 2112 bits : Single 2.7 to 3.6 V : Supply current : Up to 35 mA : Stanby current : Up to 10 mA * Operating temperature : -10 to +70C * Write Cycles : 10,000 cycles per page * Package: 32-pin plastic TSOP (TSOPI32-P-820-0.50-K) (Product name: MSM9894ALTS-KT)
PIN CONFIGURATION (TOP VIEW)
TEST RESET PRT NC NC NC VDD GND NC NC NC NC CS SCK DI DO 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC
NC: No connection 28-Pin Plastic TSOP
NC : No connection 32-Pin Plastic TSOP
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PIN DESCRIPTIONS
Pin 15 16 14 13 1 3 2 7 8 Symbol DI DO SCK CS TEST PRT RESET VDD GND I/O I O I I O I I I I Data output pin. Inputs the data transfer clock for the DI and DO pins. The device accepts the SCK pulse when CS is at "L" level and does not accept the SCK pulse when CS is at "H" level. Output pin for test. Leave this pin open. Prohibits flash memory programming at "L" level. The device is reset when RESET is at "L" level. Power supply pin (2.7 to 3.6 V) GND pin (0 V) Description Command, address, or data input pin.
ABSOLUTE MAXIMUM RATINGS
Parameter Power Supply Voltage Input Voltage Storage Temperature Symbol VDD VIN TSTG Condition Ta=25C Ta=25C -- Rating -0.3 to +7.0 -0.6 to VDD+0.6 -55 to +150 Unit V V C
RECOMMENDED OPERATING CONDITIONS
Parameter Power Supply Voltage Operating Temperature Symbol VDD Top Condition GND=0V -- Range 2.7 to 3.6 -10 to +70 Unit V C
ELECTRICAL CHARACTERISTICS
DC Characteristics
Parameter Operating Current Standby Current Input Leackage Current Output Leackage Current Input Low Voltage Input High Voltage Output Low Voltage Output High Voltage Symbol ICC ISB IIL IOL VIL VIH VOL VOH Min. -- -- -- -- -- 2.0 -- 2.0 Typ. 15 -- -- -- -- -- -- -- Max. 35 10 1 1 0.6 -- 0.4 -- Unit. mA mA mA mA V V V V
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PROGRAMMING/ERASE CHARACTERISTICS
Parameter Erase/Programming Cycle Data Retention Time Write Disturb *1) Symbol CEP TDR CPD Condition -- -- Bit error : non Bit error : 1bit Bit error : 3bits Min. -- -- -- -- -- Typ. -- -- -- -- -- Max. 10,000 10 20,000 50,000 100,000 Unit Cycles Years Cycles Cycles Cycles
*1)
"Write Disturb" means a phenomenon that frequent write cycles executed to pages in Flash memory may cause a data error in another page to which write operations are not performed. For example, 20,001 to 50,000 write operations performed to pages other than page "n" may cause a 1-bit error in page "n".
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APPLICATION CIRCUIT
DVDD DI DO SCK
AVDD FDI FDO FSCK FCS DI DO SCK CS RESET PRT
MCU
CS
MSM9888L/9889L
RESET BUSY MON
FRESET FPRT
MSC1157
AOUT SG +
LIN
Voice input
LOUT AMON FIN FOUT ADIN
XT XT
TEST0 TEST1 TEST2 DGND AGND
MSM9894AL
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WRITE DISTURB
"Write Distrub" means a phenomenon that the change from digital "0" to "1" may occur in a Flash memory page to which data is scarcely written. The above change can be avoided by refreshing Flash memory data with the DTRW command and WEND command of the MSM9888L/MSM9889L. q DTRW command This command moves some Flash memory page data to buffer.
Buffer Flash Page "n"
w WEND command This command programs buffer data to Flash memory.
Buffer Flash Page "n"
TIMING WHEN POWER IS ON
Refer to the MSM9888L/MSM9889L Data Sheet. If the timing diagrams descrided in the MSM9888L/MSM9889L Data Sheet are not satisfied, errors such as "Recording is disabled" or "Recorded message is erased" may occur.
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PACKAGE DIMENSIONS
(Unit : mm)
TSOPI32-P-820-0.50-K
Mirror finish
Package material Lead frame material Pin treatment Solder plate thickness Package weight (g)
Epoxy resin 42 alloy Solder plating 5 mm or more 0.40 TYP.
Notes for Mounting the Surface Mount Type Package The SOP, QFP, TSOP, TQFP, LQFP, SOJ, QFJ (PLCC), SHP, and BGA are surface mount type packages, which are very susceptible to heat in reflow mounting and humidity absorbed in storage. Therefore, before you perform reflow mounting, contact Oki's responsible sales person on the product name, package name, pin number, package code and desired mounting conditions (reflow method, temperature and times).
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E2Y0002-29-11
NOTICE
1. The information contained herein can change without notice owing to product and/or technical improvements. Before using the product, please make sure that the information being referred to is up-to-date. The outline of action and examples for application circuits described herein have been chosen as an explanation for the standard action and performance of the product. When planning to use the product, please ensure that the external conditions are reflected in the actual circuit, assembly, and program designs. When designing your product, please use our product below the specified maximum ratings and within the specified operating ranges including, but not limited to, operating voltage, power dissipation, and operating temperature. Oki assumes no responsibility or liability whatsoever for any failure or unusual or unexpected operation resulting from misuse, neglect, improper installation, repair, alteration or accident, improper handling, or unusual physical or electrical stress including, but not limited to, exposure to parameters beyond the specified maximum ratings or operation outside the specified operating range. Neither indemnity against nor license of a third party's industrial and intellectual property right, etc. is granted by us in connection with the use of the product and/or the information and drawings contained herein. No responsibility is assumed by us for any infringement of a third party's right which may result from the use thereof. The products listed in this document are intended for use in general electronics equipment for commercial applications (e.g., office automation, communication equipment, measurement equipment, consumer electronics, etc.). These products are not authorized for use in any system or application that requires special or enhanced quality and reliability characteristics nor in any system or application where the failure of such system or application may result in the loss or damage of property, or death or injury to humans. Such applications include, but are not limited to, traffic and automotive equipment, safety devices, aerospace equipment, nuclear power control, medical equipment, and life-support systems. Certain products in this document may need government approval before they can be exported to particular countries. The purchaser assumes the responsibility of determining the legality of export of these products and will take appropriate and necessary steps at their own expense for these. No part of the contents cotained herein may be reprinted or reproduced without our prior permission. MS-DOS is a registered trademark of Microsoft Corporation.
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Copyright 1999 Oki Electric Industry Co., Ltd.
Printed in Japan

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