Document
MOSEL-VITELIC
MS62256H 32K x 8 HIGH SPEED CMOS STATIC RAM
AMDVSA62N2C5E6DH 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
MOSEL-VITELIC
MS62256H
Pin Descriptions
A0 - A14
Address Inputs
These 15 address inputs select one of the 32768
8-bit words in the RAM.
E 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.
G 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.
Truth Table
Mode
E
G
W I/O Operation
Standby
H
X
X
Read
LLH
Output L H H
Disabled
Write
L XL
High Z DOUT High Z
D IN
W 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 Power Supply VSS Ground
Operating Range
Range
Ambient Temperature
Commercial
0°C to +70°C
Vcc 5V ± 10%
Absolute Maximum Ratings (1)
Symbol
Parameter
VCC Supply Voltage
VIN Input Voltage
VDQ Input/Output Voltage Applied
TBIAS TSTG PD
Temperature Under Plastic
Bias
Storage
Plastic
Temperature
Power Dissipation
IOUT DC Output Current
Rating Units -0.3 to 7 -0.3 to 7 V -0.3 to 6 -10 to +125 °C
-40 to +150 °C
1.2 W 50 mA
1. 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.
MOSEL-VITELIC
MS62256H
DC Electrical Characteristics (over the commercial operating range)
Parameter
Name
Parameter
Test Conditions
VIL Guaranteed Input Low Voltage(2,3) VIH Guaranteed Input High Voltage(2)
IIL Input Leakage Current
VCC= Max, V IN = 0V to VCC
IOL Output Leakage Current
VCC= Max, E = VIH or G = VIH, VIN = 0V t o VCC
VOL Output Low Voltage
VCC = Min, IOL = 8mA
VOH Output High Voltage
VCC = Min, IOH = -4.0mA
ICC
Operating Power Supply Current
VCC =
Max,
E
=
VIL,
IDQ
=
0mA,
F
=
Fm
(4) ax
MS62256H Min. Typ.(1) Max.
–0.3 -
0.8
2.2 - 6.0
–2 -
2
–2 -
2
- - 0.4
2.4 -
-
- - 200
Units V V µA µA V V mA
ICCSB ICCSB1
Standby Power Supply Current Power Down Power Supply Current
VCC = Max, E = V IH, IDQ = 0mA VCC = Max, E ≥V CC – 0.2V VIN≥V CC – 0.2V or VIN≤0.2V
- - 40 mA - - 2 mA - - 130(5) µA
1. Typical characteristics are at VCC = 5V, TA = 25°C. 2. These are absolute values with respect to device ground and all overshoots due to system or tester noise are included.
3. VIL (Min.) = –3.0V for pulse width ≤ 20ns 4. FMAX = 1/tRC. 5. L version only.
Capacitance(1) TA = 25°C, f = 1.0MHz
Symbol
Parameter
Conditions Max.
C IN Input Capacitance
CI/O
Input/Output Capacitance
VIN = 0V VI/O = 0V
8 10
1. This parameter is guaranteed and not tested.
Unit pF
pF
Data Retention Characteristics (over the commercial operating range)
Symbol VDR ICCDR tCDR
tR
Parameter VCC for Data Retention Data Retention Current
Chip Deselect to Data Retention Time Operation Recovery Time
Test Conditions E ≥V CC – 0.2V, VIN≥V CC – 0.2V or VIN≤0.2V E ≥V CC– 0.2V, VIN≥V CC-– 0.2V or VIN≤0.2V
See Retention Waveform
1. VCC = 2V, TA = +25°C 2. VCC = 3V 3. tRC = Read Cycle Time
Min. 2.0(
0
Typ.(1) 2
Max(2) -
504)
Units V µA
- - ns
tRC(3)
-
- ns
Timing Waveform Low VCC Data Retention Waveform
MOSEL-VITELIC
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 .