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E2D0033-39-21
¡ Semiconductor MSM6389C
¡ Semiconductor
This version: Feb. 1999
Previous version: May. 1997
MSM6389C
1,048,576-Word x 1-Bit Solid-State Recorder Data Register
GENERAL DESCRIPTION
The MSM6389C is a solid-state recorder data register in 1,048,576 words x 1 bit configuration.
The MSM6389C has a built-in internal address generator circuit allowing continuous serial read/
write operation by single external clock input. The internal address is automatically incremented by
one by read/write operation.
Address designation in units of 1024 words in the direction of words is possible by an external serial
address input.
The built-in refresh timer and refresh counter have eliminated the need of an external refresh circuit
and realized a low power consumption.
18-pin plastic QFJ is used as the package and the operating temperature range is between 0°C and
70°C.
The MSM6389C is suitable for storing large capacity data with battery backup. A solid state recording
and playback system can easily be constructed in combination with OKI’s voice synthesizer ICs.
FEATURES
• Configuration: 1,048,576 x 1 bit
• Serial access operation:
Serial access time 1.5 ms (3.0 ms)
Serial read/write cycle time 2.0 ms (4.0 ms)
Fast mode read/write cycle time 0.4 ms (0.4 ms)
Times in parentheses indicate ones in self-refresh mode.
• Low current consumption: 100 mA max. (for data holding, VCC=4.0V)
• Wide operating supply voltage range: Single 3.5 to 5.5V
• Auto-refresh/self-refresh changeable
• Package:
18-pin plastic QFJ (QFJ18-P-R290-1.27) (Product name: MSM6389CJS)
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¡ Semiconductor MSM6389C
BLOCK DIAGRAM
TEST
V
CC
SAD
CS
SAS
FAM
RWCK
RFSH
RS/A
TEST
TAS
Sin
Address
Register
Clock
Timing
Generator
Refresh
Timer
Pout
X-address
Counter
Load
Clock
Refresh
Counter
Clock
Multiplexer
Address
X-decoder/
Driver
Data Register
Y-decoder/sense Amp
Y-address Counter
Reset Clock
1,048,576
V
BB
Generator
I/O
Controller
Write
Clock
Generator
V
SS
DIN
DOUT
WE
PIN CONFIGURATION (TOP VIEW)
WE DIN VSSDOUT
2
TEST
3
4
CS
5 14
NC
SAD
6 13
SAS
7 12
8
TAS V
19181017
11
RS/A RFSH
CC
16
15
TEST
NC
NC
RWCK
FAM
NC: No connection
18-Pin Plastic QFJ
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¡ Semiconductor MSM6389C
PIN DESCRIPTIONS
Pin
1
Symbol
DIN
WE
TEST
CS
SAD
SAS
TAS
V
CC
RS/A
RFSH
FAM
RWCK
DOUT
V
SS
Description
Data input
Write enable2
Test input3, 16
Chip select4
Serial address data6
Serial address strobe7
Transfer address strobe8
Power supply (+5V)9
Self-refresh/auto-refresh select10
Refresh clock input11
Fast access mode select12
Read/write clock13
Data output17
Ground (0V)18
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¡ Semiconductor MSM6389C
ABSOLUTE MAXIMUM RATINGS
Parameter Symbol Condition Rating Unit
Terminal Voltage V
Output Short-Circuit Current I
Power Dissipation P
Operating Temperature T
Storage Temperature T
T
OS
D
op
STG
Ta = 25°C, relative to V
Ta = 25°C 50 mA
Ta = 25°C 1 W
— 0 to 70 °C
— –55 to +150 °C
SS
–1.0 to +7.0 V
RECOMMENDED OPERATING CONDITIONS
(Ta = 0 to 70°C)
Parameter Symbol Min. Typ. Max. Unit
Supply Voltage V
Supply Voltage V
"H" Input Voltage
"L" Input Voltage
CC
SS
V
IH
V
IL
3.5 4.5 5.5 V
000V
VCC – 0.5 V
CC
V
+ 0.5 V
CC
–0.5 0 +0.5 V
ELECTRICAL CHARACTERISTICS
DC Characteristics
Parameter Symbol Condition Min. Max. Unit
"H" Output Voltage V
"L" Output Voltage V
Input Leakage Current I
Output Leakage Current I
Supply Current (in operating state) I
Supply Current (in standby state) I
Supply Current (FAM) I
OH
OL
LI
LO
CC1
CC2
CC3
V
V
CC
CC
(VCC = 3.5 V to 5.5 V, Ta = 0 to 70°C)
I
= –0.5 mA V
OH
I
= 0.5 mA — 0.4 V
OL
V
= 0 V to V
I
V
= 0 V to V
O
= 4 V, t
V
= 4 V, t
CC
CC
CC
= 2 µs — 5 mA
RWC
= 4 V — 100 mA
= 0.4 ms — 15 mA
RWC
– 0.5 — V
CC
–1 +1 mA
–1 +1 mA
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¡ Semiconductor MSM6389C
AC Characteristics
(V
= 3.5 V to 5.5 V, Ta = 0 to 70°C)
CC
Parameter Symbol
REF
RWC
ACC
OFF
T
RWP
RW
SSC
SAS
SAP
AS
AH
ATS
TRS
TAS
RRS
RRH
WRS
WRH
WP
RWL
DS
DH
RWD
RFS
RFP
RF
RRP
FC
FAC
FCP
FR
FS
FH
FCC
SS
SH
MSM6389C-SELF MSM6389C-AUTO
Min. Max. Min. Max.
———100Refresh Cycle t
4,000 — 2,000 —Read/Write Cycle Time t
— 3,000 — 1,500Access Time t
050050Output Turn-off Delay Time t
350350Input Signal Rise/Fall Time t
1,000 — 500 —RWCK Precharge Time t
3,000 10,000 1,500 10,000RWCK Pulse Width t
100 — 100 —SAS Cycle Time t
50—50—SAS Pulse Width t
50—50—SAS Precharge Time t
0—0—Address Setup Time t
50—50—Address Hold Time t
50—50—TAS Setup Time t
50—50—TAS to RWCK Setup Time t
50—50—TAS Pulse Width t
0—0—Read Command Setup Time t
50—50—Read Command Hold Time t
0—0—Write Command Setup Time t
50—50—Write Command Hold Time t
50—50—Write Command Pulse Width t
50—50—WE to RWCK Lead Tme t
0—0—Data Setup Time t
50—50—Data Hold Time t
100 — 100 —RWCK to WE Delay Time t
— — 500 —RFSH Setup Time t
— — 500 —RFSH Precharge Time t
— — 1,500 10,000RFSH Pulse Width t
— — 500 —RFSH RWCK Precharge Time t
400 — 400 —Fast Mode Cycle Time t
— 300 — 300Fast RWCK Mode Access Time t
100 — 100 —Fast RWCK Precharge Time t
300 — 300 —Fast Mode RWCK Pulse Width t
0—0—Fast Mode Setup Time t
50—50—Fast Mode Hold Time t
4,000 100,000 2,000 100,000Fast Mode Width t
0—0—Slow Mode Setup Time t
50—50—Slow Mode Hold Time t
Unit
ms
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Note: Switching to the fast mode should be made satisfying the timings of tFS and tSS at the "L" level
of RWCK.
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¡ Semiconductor MSM6389C
TIMING DIAGRAMS
Read/Write/Read Modify Write Cycle
CS
t
RWC
t
RW
t
RWF
t
RW
RWCK
SAS
SAD
TAS
WE
DIN
DOUT
t
SSC
t
t
SAS
t
t
AS
AH
SAP
A0 A1 A2 A9
t
ATS
t
RRS
t
t
TAS
TRS
t
RWL
t
t
RRH
RWD
t
WP
t
DH
t
DS
DY1
t
ACC
t
OFF
XnY0 XnY1 High-Z
t
WRH
t
WRS
t
DS
t
DH
DY2
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¡ Semiconductor MSM6389C
Auto-Refresh Mode
CS
TAS
RS/A
RWCK
WE
DIN
t
RFS
t
RRP
DOUT
RFSH
XnY0 XnY1 XnY2 XnY4 XnY5 XnY6 XnY7
t
RF
t
RFP
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¡ Semiconductor MSM6389C
Fast Access Mode
CS
SAS
SAD
TAS
RWCK
FAM
DOUT
t
FR
t
FCP
t
FS
t
FAC
XnY0 Yn+1 Yn+3 Ym+1 Ym+3 Ym+4 Y1021– Y1023 Y0Y2Y3Y4 Xn+1Y5
XnYn Yn+2 Ym+2 Ym+5 Y1022 Xn+1 Y1 Xn+1Y6
t
FCC
t
SS
t
SH
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¡ Semiconductor MSM6389C
FUNCTIONAL DESCRIPTION
Serial Address Input (SAD)
Pin for inputting the start address for read/write. Address data can be input in units of 1024 words.
The 1,024 address data can be input as 10-bit (A0-A9) serial from the SAD pin.
Serial Address Strobe (SAS)
Pin for the clock used to store the serial address data into the internal register.
Address Transfer Strobe (TAS)
Input pin for setting the serial address data stored in the address register to the internal address
counter.
When the TAS falls, the Y address is set to address 0.
Read/Write Clock (RWCK)
Input pin for the data register information read/write clock.
Internal operation starts at the falling edge of RWCK. The information in the data register is output
to the DOUT pin in the read mode, and the information at the DIN pin is written into the data register
in the write mode. The internal address counter is automatically incremented when RWCK falls.
Write Enable (WE)
Input pin for selecting the read mode, write mode or read modify write mode.
The read mode is set when WE is "H", and the write mode is set when WE is "L". When WE falls from
"H" to "L" while RWCK is active, the read modify write mode is set.
Data Input (DIN)
Input pin for write data.
The information at the data input pin is stored at the falling edge of RWCK in the write mode, and
at the falling edge of WE in the read modify write mode.
Data Output (DOUT)
The data output pin is always kept in the high impedance state when RWCK or CS is kept at "H".
When "H" or "L" information is read in the read operation, the output pin is set to "H" to "L" and holds
the read information until RWCK is again set to "H". In the early write mode the output pin maintains
the high impedance state, so I/O common operation by connecting DIN and DOUT is possible.
Chip Select (CS)
Input pin for disabling all input and output pins. This pin enables parallel use of multiple
MSM6389Cs by connecting the data input and output pins.
Self/Auto Refresh Select (RS/A)
Pin for selecting a refresh mode in order to retain memory cell data.
If the RS/A pin is set to "L" level, the self-refresh mode is selected and no external refresh control is
required. If the RS/A pin is set to "H" level, the auto-refresh mode is selected and refresh operation
is required to retain memory cell data.
Refresh Clock Input (RFSH)
Input pin for controlling the external refresh when the auto refresh mode is selected. When the autorefresh mode is selected, 1024 refresh operations are required within 100ms via the RFSH pin while
the RWCK is at "H" level.
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¡ Semiconductor MSM6389C
Fast Access Mode Select (FAM)
Pin for fast read/write operations. Fast read/write is possible by keeping the FAM pin at "L" level.
The fast access mode is set or released by inputting "L" level or "H" level to the FAM pin when
the RWCK pin is at "L" level, and when tFS and tSS are satisfied.
When 1024-word data access is complete, be sure to insert a normal cycle in order to increment the
X address.
Test (TEST)
The TEST pin is fixed to "H" level.
Turning the power ON
To stabilize the device, it is required to pause for over 100ms after the VCC reaches the specified
voltage. Then it is needed to add eight or more RWCK cycles (read cycles or pseudo data write cycles).
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¡ Semiconductor MSM6389C
PACKAGE DIMENSIONS
(Unit : mm)
QFJ18-P-R290-1.27
Spherical surface
Package material
Lead frame material
Pin treatment
Solder plate thickness
Package weight (g)
Epoxy resin
42 alloy
Solder plating
5 mm or more
0.50 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
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