MOSEL-VITELIC

MS62256H

Pin Descriptions

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.

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.

Data Input/Output Ports

These 8 bidirectional ports are used to read data

from or write data into the RAM.

Power Supply

Ground

Truth Table

Operating Range

Range

Ambient

Temperature

Commercial

0°C to +70°C

5V ± 10%

Mode

E

G

W

I/O Operation

Standby

H

X

X

High Z

Read

L

L

H

Output

Disabled

L

H

H

High Z

Write

L

X

L

Symbol

Parameter

Rating

Units

Supply Voltage

-0.3 to 7

Input Voltage

-0.3 to 7

V

Input/Output Voltage Applied

-0.3 to 6

Temperature Under

Bias

Plastic

-10 to +125

°C

Storage

Temperature

Plastic

-40 to +150

°C

Power Dissipation

1.2

W

DC Output Current

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.