OKI MSM9894AL

E2D0095-19-22
¡ Semiconductor
MSM9894AL
¡ Semiconductor
This version:
Feb. 1999
MSM9894AL
8M-bit Serial Voice Flash Memory
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 +70°C
• 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
NC: No connection
28-Pin Plastic TSOP
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
32-Pin Plastic TSOP
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¡ Semiconductor
MSM9894AL
PIN DESCRIPTIONS
Pin
Symbol
I/O
15
DI
I
Command, address, or data input pin.
Description
16
DO
O
Data output pin.
14
SCK
I
Inputs the data transfer clock for the DI and DO pins.
13
CS
I
1
TEST
O
Output pin for test. Leave this pin open.
3
PRT
I
Prohibits flash memory programming at "L" level.
2
RESET
I
The device is reset when RESET is at "L" level.
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.
7
VDD
I
Power supply pin (2.7 to 3.6 V)
8
GND
I
GND pin (0 V)
ABSOLUTE MAXIMUM RATINGS
Parameter
Symbol
Condition
Rating
Unit
VDD
Ta=25°C
–0.3 to +7.0
V
Input Voltage
VIN
Ta=25°C
–0.6 to VDD+0.6
V
Storage Temperature
TSTG
—
–55 to +150
°C
Power Supply Voltage
RECOMMENDED OPERATING CONDITIONS
Symbol
Condition
Range
Unit
Power Supply Voltage
Parameter
VDD
GND=0V
2.7 to 3.6
V
Operating Temperature
Top
—
–10 to +70
°C
ELECTRICAL CHARACTERISTICS
DC Characteristics
Symbol
Min.
Typ.
Max.
Unit.
Operating Current
Parameter
ICC
—
15
35
mA
Standby Current
ISB
—
—
10
mA
Input Leackage Current
IIL
—
—
1
mA
Output Leackage Current
IOL
—
—
1
mA
Input Low Voltage
VIL
—
—
0.6
V
Input High Voltage
VIH
2.0
—
—
V
Output Low Voltage
VOL
—
—
0.4
V
Output High Voltage
VOH
2.0
—
—
V
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¡ Semiconductor
MSM9894AL
PROGRAMMING/ERASE CHARACTERISTICS
Parameter
Erase/Programming Cycle
Symbol
Condition
Min.
Typ.
Max.
Unit
CEP
—
—
—
10,000
Cycles
Data Retention Time
TDR
—
—
—
10
Years
Write Disturb *1)
CPD
Bit error : non
—
—
20,000
Cycles
Bit error : 1bit
—
—
50,000
Cycles
Bit error : 3bits
—
—
100,000
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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¡ Semiconductor
MSM9894AL
APPLICATION CIRCUIT
DI
FDI
DI
DO
FDO
DO
SCK
FSCK
SCK
FCS
CS
RESET
BUSY
MON
LIN
MSM9888L/9889L
MCU
AVDD
CS
FRESET
RESET
FPRT
MSM9894AL
DVDD
PRT
MSC1157
AOUT
Voice input
SG
LOUT
+
AMON
XT
FIN
XT
FOUT
ADIN
TEST0
TEST1
TEST2
DGND
AGND
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¡ Semiconductor
MSM9894AL
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
w WEND command
This command moves some Flash memory
page data to buffer.
This command programs buffer data to
Flash memory.
Buffer
Buffer
Flash
Page "n"
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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¡ Semiconductor
MSM9894AL
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.
2.
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.
3.
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.
4.
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.
5.
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.
6.
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.
7.
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.
8.
No part of the contents cotained herein may be reprinted or reproduced without our prior
permission.
9.
MS-DOS is a registered trademark of Microsoft Corporation.
Copyright 1999 Oki Electric Industry Co., Ltd.
Printed in Japan