BS62LV2006

R0201-BS62LV2006

Revision

1.3

May.

2006

2

n PIN DESCRIPTIONS

Name

Function

A0-A17 Address Input

These 18 address inputs select one of the 262,144 x 8-bit in the RAM

CE1 Chip Enable 1 Input

CE2 Chip Enable 2 Input

CE1 is active LOW and CE2 is active HIGH. Both chip enables must be active when

data read form or write to the device. If either chip enable is not active, the device is

deselected and is in standby power mode. The DQ pins will be in the high impedance

state when the device is deselected.

WE Write Enable Input

The write enable input is active LOW and controls read and write operations. With the

chip selected, when WE is HIGH and OE is LOW, output data will be present on the

DQ pins; when WE is LOW, the data present on the DQ pins will be written into the

selected memory location.

OE 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 impendence state when OE is inactive.

DQ0-DQ7 Data Input/Output

Ports

There 8 bi-directional ports are used to read data from or write data into the RAM.

Power Supply

GND

Ground

n TRUTH TABLE

MODE

CE1

CE2

WE

OE

I/O OPERATION

H

X

X

X

Not selected

(Power Down)

X

L

X

X

High Z

Output Disabled

L

H

H

H

High Z

Read

L

H

H

L

Write

L

H

L

X

n ABSOLUTE MAXIMUM RATINGS

(1)

SYMBOL

PARAMETER

RATING

UNITS

Terminal Voltage with

Respect to GND

-0.5

V

Temperature Under

Bias

-40 to +125

Storage Temperature

-60 to +150

Power Dissipation

1.0

W

DC Output Current

20

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.

2.

–2.0V in case of AC pulse width less than 30 ns.

n OPERATING RANGE

RANG

AMBIENT

TEMPERATURE

Commercial

0

2.4V ~ 5.5V

Industrial

-40

2.4V ~ 5.5V

n CAPACITANCE

SYMBOL PAMAMETER CONDITIONS MAX. UNITS

Input

Capacitance

6

pF

Input/Output

Capacitance

8

pF

1. This parameter is guaranteed and not 100% tested.