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MOSEL-VITELIC
MS62256H 32K x 8 HIGH SPEED CMOS STATIC RAM
MS62256H ADVANCED INFORMATION
Features
s High-speed - 15/20/25/35 ns s Low Power dissipation: MS62256HL 1.1W (Max.) Operating 1mW (Max.) Power down s Fully static operation s All inputs and outputs directly TTL compatible s Three state outputs s Ultra low data retention supply current at VCC = 2V
Description
The MS62256H is a 262,144-bit static random access memory organized as 32,768 words by 8 bits and operates from a single 5 volt supply. It is built with MOSEL-VITELIC's high performance twin tub CMOS process. Inputs and three-state outputs are TTL compatible and allow for direct interfacing with common system bus structures. The MS62256H is available in the following standard 28-pin packages: 600 MIL Plastic DIP 300 MIL Plastic DIP 300 MIL Small Outline J-Bend (SOJ)
Pin Configurations
Functional Block Diagram
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Pin Descriptions
A0 - A14 Address Inputs These 15 address inputs select one of the 32768 8-bit words in the RAM. Chip Enable Input E is active LOW. The chip enable must be active to read from or write to the device. If it is not active, the device is deselected and is in a standby power mode. The DQ pins will be in the high-impedance state when deselected. Output Enable Input The output enable input is active LOW. If the output enable is active while the chip is selected and the write enable is inactive, data will be present on the DQ pins and they will be enabled. The DQ pins will be in the high impedance state when G is inactive. G E W
MS62256H
Write Enable Input The write enable input is active LOW and controls read and write operations. With the chip enabled, when W is HIGH and G is LOW, output data will be present at the DQ pins; when W is LOW, the data present on the DQ pins will be written into the selected memory location. DQ0 - DQ7 Data Input/Output Ports These 8 bidirectional ports are used to read data from or write data into the RAM. VCC VSS Power Supply Ground
Truth Table
Mode Standby Read Output Disabled Write E H L L L G X L H X W X H H L I/O Operation High Z DOUT High Z D IN
Operating Range
Range Commercial Ambient Temperature 0C to +70C Vcc 5V 10%
Absolute Maximum Ratings (1)
Symbol VCC VIN VDQ TBIAS TSTG PD IOUT 1. Parameter Supply Voltage Input Voltage Input/Output Voltage Applied Temperature Under Bias Storage Temperature Power Dissipation DC Output Current Plastic Plastic Rating -0.3 to 7 -0.3 to 7 -0.3 to 6 -10 to +125 -40 to +150 1.2 50 C C W mA V Units
Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability and degrade performance characteristics.
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DC Electrical Characteristics (over the commercial operating range)
Parameter Name VIL VIH IIL IOL VOL VOH ICC ICCSB ICCSB1 1. 2. 3. 4. 5. Parameter Guaranteed Input Low Voltage(2,3) Guaranteed Input High Voltage(2) Input Leakage Current Output Leakage Current Output Low Voltage Output High Voltage Operating Power Supply Current Standby Power Supply Current Power Down Power Supply Current VCC = Max, V IN = 0V to VCC VCC = Max, E = VIH or G = VIH, VIN = 0V t o VCC VCC = Min, IOL = 8mA VCC = Min, IOH = -4.0mA VCC = Max, E = VIL, IDQ = 0mA, F = Fm ax(4) VCC = Max, E = V IH, IDQ = 0mA VCC = Max, E V VIN V
CC CC - 0.2V
MS62256H
Test Conditions
MS62256H Min. Typ.(1) Max. -0.3 2.2 -2 -2 2.4 0.8 6.0 2 2 0.4 200 40 2 130(5)
Units V V A A V V mA mA mA A
- 0.2V or VIN 0.2V
Typical characteristics are at VCC = 5V, TA = 25C. These are absolute values with respect to device ground and all overshoots due to system or tester noise are included. VIL (Min.) = -3.0V for pulse width 20ns FMAX = 1/tRC. L version only.
Capacitance(1) TA = 25C, f = 1.0MHz
Symbol C IN CI/O Parameter Input Capacitance Input/Output Capacitance Conditions VIN = 0V VI/O = 0V Max. 8 10 Unit pF pF
1. This parameter is guaranteed and not tested.
Data Retention Characteristics (over the commercial operating range)
Symbol VDR ICCDR tCDR tR 1. 2. 3. Parameter VCC for Data Retention Data Retention Current Chip Deselect to Data Retention Time Operation Recovery Time E V E V
CC -
Test Conditions 0.2V, VIN V
CC -
Min. 2.0( 0
Typ.(1) 2 -
(2) Max
Units V A ns ns
0.2V or VIN 0.2V
504) -
CC- 0.2V, VIN V
CC-- 0.2V or VIN 0.2V
See Retention Waveform tRC(3)
VCC = 2V, TA = +25C VCC = 3V tRC = Read Cycle Time
Timing Waveform Low VCC Data Retention Waveform
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AC Test Conditions
Input Pulse Levels Input Rise and Fall Times Timing Reference Level 0V to 3.0V 3ns 1.5V
MS62256H
Key to Switching Waveforms
AC Test Loads and Waveforms
AC Electrical Characteristics (over the commercial operating range)
Read Cycle
Jedec Parameter Parameter Name Name tAVAX tAVQV tELQV tGLQX tEHQZ tGLQX tEHQZ tGHQZ tAXQX tRC tAA tACS tOE tCLZ tOLZ tCHZ tOHZ tOH MS62256H-15 MS62256H-20 MS62256H-25 MS62256H-35 Parameter Read Cycle Time Address Access Time Chip Enable Access Time Output Enable to Output Valid Chip Enable to Output Low Z Output Enable to Output in Low Z Chip Disable to Output in High Z Output Disable to Output in High Z Output Hold from Address Change Min. 15 5 0 3 Max. Min. 15 15 8 8 8 20 5 0 5 Max. Min. 20 20 10 8 8 25 5 0 5 Max. Min. 25 25 12 10 10 35 5 0 5 Max. 35 35 15 15 15 Unit ns ns ns ns ns ns ns ns ns
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Switching Waveforms (Read Cycle)
READ CYCLE 1(1)
MS62256H
READ CYCLE 2(1, 2, 4)
READ CYCLE 3(1, 3, 4)
NOTES: 1. W is High for READ Cycle. 2. Device is continuously selected E = VIL. 3. Address valid prior to or coincident with E transition low. 4. G = VIL. 5. Transition is measured 500mV from steady state with CL = 5pF as shown in Figure 1b. This parameter is guaranteed and not 100% tested.
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AC Electrical Characteristics (over the commercial operating range)
Write Cycle
Jedec Parameter Parameter Name Name tAVAX tELWH tAVWL tAVWH tWLWH tWHAX tWLQZ tDVWH tWHDX tGHQZ tWHQX tWC tCW tAS tAW tWP tWR tWHZ tDW tDH tOHZ tOW
MS62256H
MS62256H-15 MS62256H-20 MS62256H-25 MS62256H-35 Parameter Write Cycle Time Chip Enable to End of Write Address Set up Time Address Valid to End of Write Write Pulse Width Write Recovery Time Write to Output in High Z Data to Write Time Overlap Data Hold from Write Time Output Disable to Output in High Z Output Active from End of Write Min. 15 10 0 10 12 0 0 8 0 0 3 Max. Min. 10 8 20 15 0 15 12 0 0 10 0 0 3 Max. Min. 10 8 25 20 0 20 15 0 0 13 0 0 3 Max. Min. 13 10 35 25 0 25 20 0 0 15 0 0 0 Max. 15 Unit ns ns ns ns ns ns ns ns ns ns ns
Switching Waveforms (Write Cycle)
WRITE CYCLE 1(1)
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Switching Waveforms (Write Cycle)
WRITE CYCLE 2(1,6)
MS62256H
NOTES: 1. W must be high during address transitions. 2. The internal write time of the memory is defined by the overlap E active and W low. Both signals must be active to initiate and any one signal can terminate a write by going inactive. The data input setup and hold timing should be referenced to the second transition edge of the signal that terminates the write. 3. TWR is measured from the earlier of E or W going high at the end of write cycle. 4. During this period, DQ pins are in the output state so that the input signals of opposite phase to the outputs must not be applied. 5. If the E low transition occurs simultaneously with the W low transitions or after the W low transition, outputs remain in a high impedance state. 6. G is continuously low (G = VIL). 7. DOUT is the same phase of write data of this write cycle. 8. DOUT is the read data of next address. 9. If E is low during this period, DQ pins are in the output state. Then the data input signals of opposite phase to the outputs must not be applied to them. 10. Transition is measured 500mV from steady state with CL = 5pF as shown in Figure 1b on page 4. This parameter is guaranteed and not 100% tested. 11. tCW is measured from E going low to the end of write.
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Ordering Information
Speeds 15 15 20 20 25 25 35 35 Ordering Part Number MS62256H-15NC MS62256H-15RC MS62256H-20NC MS62256H-20RC MS62256H-25NC MS62256H-25RC MS62256H-35NC MS62256H-35RC Package 28 Pin Plastic DIP - 300 mil 28 Pin Small Outline J Bend 28 Pin Plastic DIP - 300 mil 28 Pin Small Outline J Bend 28 Pin Plastic DIP - 300 mil 28 Pin Small Outline J Bend 28 Pin Plastic DIP - 300 mil 28 Pin Small Outline J Bend
MS62256H
Temperature Range 0C to +70C 0C to +70C 0C to +70C 0C to +70C 0C to +70C 0C to +70C 0C to +70C 0C to +70C
Package Dimensions 28 Pin 300 mil Plastic DIP
28 Pin 300 mil SOJ
MOSEL-VITELIC
U.S.A.
3910 NORTH FIRST STREET SAN JOSE, CA 95134 PHONE: 408-433-6000 FAX: 408-433-00952
WORLDWIDE OFFICES
TAIWAN
5F, NO.. 102 MIN CHUAN E. ROAD, SEC.3 TAIPEI PHONE: 011-886-2-545-1213 FAX: 011-886-2-545-1214
MS62256H
KOREA
RM. 309, BEUK-EUN BLDG. 1339-1 SEOCHO-DONG, SEOCHO-KU SEOUL, KOREA PHONE: 011-82-2-553-3385 FAX: 011-82-2-553-3675
JAPAN
RM.302 ANNEX-G HIGASHI-NAKANO NAKANO-KU, TOKYO 164 PHONE: 011-81-03-3365-2851 FAX: 011-81-03-3365-2836
HONG KONG
19 DAI FU STREET TAIPO INDUSTRIAL ESTATE TAIPO, NT, HONG KONG PHONE: 011-852-665-4883 FAX: 011-852-664-7535
1 R&D ROAD I SCIENCE BASED IND. PARK HSIN CHU, TAIWAN, R.O.C. PHONE: 011-886-35-770055 FAX: 011-886-35-776520
KSP R&D C-4F, SSAKADO 3-2-1 TAKATSU-KU, KAWASAKI-SHI KANAGAWA PREF 213 PHONE: 011-81-04-4812-4397 FAX: 011-81-04-4812-4074
U.S. SALES OFFICES
NORTHWESTERN
3910 NORTH FIRST STREET SAN JOSE, CA 95134 PHONE: 408-433-6000 FAX: 408-433-0952
SOUTHWESTERN
SUITE 200 5150 E. PACIFIC COAST HWY. LONG BEACH, CA 90804 PHONE: 310-498-3314 FAX: 310-597-2174
CENTRAL & SOUTHEASTERN
604 FIELDWOOD CIRCLE RICHARDSON, TX 75081 PHONE: 214-690-1402 FAX: 214-690-0341
NORTHEASTERN
SUITE 306 71 SPITBROOK ROAD NASHUA, NH 03062 PHONE: 603-891-2007 FAX: 603-891-3597
5/93 (c) Copyright 1993, MOSEL-VITELIC Inc. Printed in U.S.A.
The information in this document is subject to change without notice. MOSEL-VITELIC makes no commitment to update or keep current the information contained in this document. No part of this document may be copied or reproduced in any form or by any means without the prior written consent of MOSEL-VITELIC.
MOSEL-VITELIC subjects its products to normal quality control sampling techniques which are intended to provide an assurance of high quality products suitable for usual commercial applications. MOSEL-VITELIC does not do testing appropriate to provide 100% product quality assurance and does not assume any liability for consequential or incidental arising from any use of its products. If such products are to be used in applications in which personal injury might occur from failure, purchaser must do its own quality assurance testing appropriate to such applications.
MOSEL-VITELIC
3910 N. First Street, San Jose, CA 95134-1501 Ph: (408) 433-6000 Fax: (408) 433-0952 Tlx: 371-9461

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