Pin Description

Pin Name

I/O

Description

A0~A14

I

Address input pins

WE

I

Write enable signal pin, active LOW

OE

I

Output enable signal pin, active LOW

CS

I

Chip select signal pin, active LOW

D0~D7

I/O

Data input and output signal pins

VDD

¾

Positive power supply

VSS

¾

Negative power supply, ground

Absolute Maximum Rating

-0.5V to +3.6V

°Cto70°C

Storage Temperature (Plastic), Tstg ...

-55°Cto125°C

Power Consumption, PT .......................................0.7W

Note: These are stress ratings only. Stresses exceeding the range specified under

²Absolute Maximum Ratings² may

cause substantial damage to the device. Functional operation of this device at other conditions beyond those

listed in the specification is not implied and prolonged exposure to extreme conditions may affect device reliabil-

ity.

D.C. Characteristics

Ta=25

Symbol

Parameter

Test Conditions

Min.

Typ.

Max.

Unit

Operating Voltage

¾

2.7

3.0

3.3

V

Input Low Voltage

¾¾

0

0.4

V

Input High Voltage

¾

0.7

¾

V

Input Leakage Current

¾¾

1

mA

Output Leakage Current

¾¾

1

mA

Output Low Voltage

¾¾

0.3

V

Output High Voltage

-1mA

-0.3

¾¾

V

Operating Current

¾¾

20

mA

Standby Current

¾¾

50

mA

Power Down Supply Current

CS

¾

210

mA

HT62L256

Rev. 0.00

2

August 15, 2002

Preliminary