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E2D0032-39-21
Semiconductor MSM6587
Semiconductor 524,288-Word x 1-Bit Serial Register
This version: Feb. 1999 MSM6587 Previous version: May. 1997
GENERAL DESCRIPTION
The MSM6587 is a serial register in 524,288 words x 1 bit configuration featuring medium speed operation with low-power consumption. The MSM6587 has a built-in internal address generator circuit allowing continuous serial read/write operation by external clock input. The internal address is automatically incremented or decremented by one by read/write operation. Address increment or decrement can be selected by external input. Address designation in units of 1024 words in the direction of words is possible by an external serial address input. A refresh timer and refresh counter are built in to eliminate the need of the external refresh circuit and to realize low power consumption. 18-pin plastic QFJ (PLCC) is used as the package and the operating temperature range is between 0C and 70C. The MSM6587 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 : 524,288 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=4.0 V) * Wide operating supply voltage range : Single 3.5 to 5.5 V * Auto-refresh/self-refresh changeable * Package: 18-pin plastic QFJ (PLCC) (QFJ18-P-R290-1.27) (Product name : MSM6587JS)
1/13
Semiconductor
MSM6587
BLOCK DIAGRAM
TEST VCC SAD AU/D CS
Sin Address Register Pout U/D X-address Register VBB Generator
VSS
Address Multiplexer X-decoder/ Driver 524,288 Data Register
DIN
I/O Control
Clock
Load Clock
DOUT
SAS FAM (TEST) RWCK TEST RFSH (TEST) RS/A (TEST) TAS
Refresh Timer Timing Generator
Refresh Counter
Y-decoder/sense Amp Write Clock Generator
WE
U/D Y-address Counter Reset Clock Clock
PIN CONFIGURATION (TOP VIEW)
WE DIN VSS DOUT 2 1 18 17
TEST 3 CS 4 NC 5 SAD 6 SAS 7
16 TEST 15 AU/D 14 NC 13 RWCK 12 FAM (TEST)
8
9
10
11
TAS VCC RS/A RFSH (TEST) (TEST)
NC: No connection 18-Pin Plastic QFJ
2/13
Semiconductor
MSM6587
PIN DESCRIPTIONS
Pin 1 2 3, 16 4 6 7 8 9 10 11 12 13 15 17 18 Symbol DIN WE TEST CS SAD SAS TAS VCC RS/A (TEST) RFSH (TEST) FAM (TEST) RWCK AU/D DOUT VSS Data input Write enable Test input Chip select Serial address data Serial address strobe Transfer address strobe Power supply (+5V) Self-refresh/auto-refresh select (Test input) Refresh clock input (Test input) Fast access mode select (Test input) Read/write clock Address up/down select Data output Ground (0V) Description
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Semiconductor
MSM6587
ABSOLUTE MAXIMUM RATINGS
Parameter Terminal Voltage Output Short-Circuit Current Power Dissipation Operating Temperature Storage Temperature Symbol VT IOS PD Top TSTG Condition Ta = 25C, relative to VSS Ta = 25C Ta = 25C -- -- Rating -1.0 to +7.0 50 1 0 to 70 -55 to +150 Unit V mA W C C
RECOMMENDED OPERATING CONDITIONS
(Ta = 0 to 70C) Parameter Supply Voltage Supply Voltage "H" Input Voltage "L" Input Voltage Symbol VCC VSS VIH VIL Min. 3.5 0 VCC - 0.5 -0.5 Typ. 5.0 0 VCC 0 Max. 5.5 0 VCC + 0.5 +0.5 Unit V V V V
ELECTRICAL CHARACTERISTICS
DC Characteristics
(VCC = 3.5 V to 5.5 V, Ta = 0 to 70C) Parameter "H" Output Voltage "L" Output Voltage Input Leakage Current Output Leakage Current Supply Current (in operating state) Supply Current (in standby state) Supply Current (FAM) Symbol VOH VOL ILI ILO ICC1 ICC2 ICC3 Condition IOH = -0.5 mA IOL = 0.5 mA VI = 0 V to VCC VO = 0 V to VCC VCC = 4 V, tRWC = 2 s VCC = 4V VCC = 4 V, tRWC = 0.4 ms Min. VCC - 0.5 -- -1 -1 -- -- -- Max. -- 0.4 +1 +1 5 100 15 Unit V V mA mA mA mA mA
4/13
Semiconductor AC Characteristics
MSM6587
(VCC = 3.5 V to 5.5 V, Ta = 0 to 70C) Parameter Refresh Cycle Read/Write Cycle Time Access Time Output Turn-off Delay Time Input Signal Rise/Fall Time RWCK Precharge Time RWCK Pulse Width SAS Cycle Time SAS Precharge Time SAS Pulse Width Address Setup Time Address Hold Time TAS Setup Time TAS to RWCK Setup Time TAS Pulse Width Read Command Setup Time Read Command Hold Time Write Command Setup Time Write Command Hold Time Write Command Pulse Width WE to RWCK Lead Time Data Setup Time Data Hold Time RWCK to WE Delay Time AU/D Setup Time AU/D Hold Time AU/D to TAS Setup Time RFSH Setup Time RFSH Precharge Time RFSH Pulse Width RFSH RWCK Precharge Time Fast RWCK Precharge Time Fast RWCK Mode Cycle Fast Mode Access Time Fast RWCK Mode Cycle Time Fast Mode Setup Time Fast Mode Hold Time Symbol tREF tRWC tACC tOFF tT tRWP tRW tSSC tSAP tSAS tAS tAH tATS tTRS tTAS tRRS tRRH tWRS tWRH tWP tRWL tDS tDH tRWD tUDS tUDH tUDTS tRFS tRFP tRF tRRP tFC tFAC tFCP tFR tFS tFH MSM6587-SELF Min. -- 4,000 -- 0 3 1,000 3,000 100 50 50 0 50 50 50 50 0 250 0 50 50 50 0 50 100 0 50 0 -- -- -- -- 400 -- 100 300 0 50 Max. -- -- 3,000 50 50 -- 10,000 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 300 -- -- -- -- MSM6587-AUTO Min. -- 2,000 -- 0 3 500 1,500 100 50 50 0 50 50 50 50 0 250 0 50 50 50 0 50 100 0 50 0 500 500 1,500 500 400 -- 100 300 0 50 Max. 100 -- 1,500 50 50 -- 10,000 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 10,000 -- -- 300 -- -- -- -- 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
5/13
Semiconductor AC Characteristics (Continued)
MSM6586-SELF Min. 4,000 0 50 Max. 100,000 -- --
MSM6587
Parameter Fast Mode Width Slow Mode Setup Time Slow Mode Hold Time
Symbol tFCC tSS tSH
MSM6586-AUTO Min. 2,000 0 50 Max. 100,000 -- --
Unit ns ns ns
Note: 1. Up/down switching for internal addresses is not available in fast mode. 2. Switching to the fast mode should be made satisfying the timings of tFS and tSS at the "L" level of RWCK.
6/13
, ,, ,, , , ,, ,
Read/Write/Read Modify Write Cycle
Semiconductor
TIMING DIAGRAMS
CS
AU/D
tRWC
tUDS
tRW
tRWP
tRW
tUDH
RWCK
tSSC
tUDTS
tSAS
tSAP
tTRS
SAS
tAS
tAH
SAD (Note) TAS
A0
A1
A2
A9
tATS
tTAS
tRWL
tRWD
tWP
tWRS
tWRH
tRRS
tRRH
WE
tDH tDS
tDH tDS
DIN
DY1
DY2
tACC
tOFF
DOUT
XnY0
XnY1
High-Z
MSM6587
Note: Out of ten bits from A0 to A9, only the nine bits from A0 to A8 are effective. Fix A9 to "L".
7/13
Semiconductor
Address Up/Down Select Mode

CS SAS SAD TAS AU/D RWCK DOUT XnY0 XnY1 XnY1023 Xn+1Y0 Xn+1Y1 XmY1023 XmY1022 XmY1 XmY0 Xm-1Y1023
MSM6587
8/13
Auto-Refresh Mode
Semiconductor
CS

TAS RS/A RWCK tRFS tRRP WE DIN DOUT XnY0 RFSH tRF tRFP XnY1 XnY2 XnY4 XnY5 XnY6 XnY7
MSM6587
9/13
Semiconductor
Fast Access Mode
CS

SAS SAD TAS AU/D tFR tFCP RWCK tFS FAM tFAC DOUT XnY0 XnYn Yn+1 Yn+3 Ym+1 Ym+3 Ym+4 Y1021 Y1023 Xn+1Y0 Y2 Y3 Y4 Yn+2 Ym+2 Ym+5 Y1022 Y1 Xn+1Y3 Xn+1Y2 tFCC tSS tSH
MSM6587
10/13
Semiconductor
MSM6587
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. (A0-A8 has enable address, A9 keeps "L".) 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, and the Y address is set to address 0 in the increment mode or to address 1023 in the decrement mode. 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 or decremented also 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" or "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. Address Up/Down Select (AU/D) Input pin for selecting the direction of automatic address updating. When the TAS signal is input with the AU/D pin set to "H", the internal address counters are set to the externally set address for X and to address 0 for Y. Then the address is incremented by 1 every time RWCK is input. When the TAS signal is input with the AU/D pin set to "L", the internal address counters are set to the externally set address in the same way for X but set to address 1023 for Y. Then the address is decremented by 1 every time RWCK is input. In either case, the X address is automatically incremented or decremented by 1 when read/write operation for 1024 words ends. The AU/D pin setting change is possible in any read/write cycle so long as the timing specifications for tUDS, tUDH are satisfied.
11/13
Semiconductor
MSM6587
Chip Select (CS) Input pin for disabling all input and output pins. This pin enables parallel use of multiple MSM6587s by connecting the data input and output pins. Self/Auto Refresh Select (RS/A (TEST)) 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 (TEST)) Input pin for controlling the external refresh when the auto refresh mode is selected. When the auto-refresh mode is selected, 1024 refresh operations are required within 100ms via the RFSH pin while the RWCK is at "H" level. Fast Access Mode Select (FAM (TEST)) 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 or decrement the X address. Test (TEST, TEST) The TEST pin is fixed to "L" level. 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).
12/13
Semiconductor
MSM6587
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. 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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