AT27C020

3

Absolute Maximum Ratings*

Temperature Under Bias.......................-55°C to +125°C

*NOTICE:

Stresses beyond 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 beyond those

indicated in the operational sections of this

specification is not implied. Exposure to abso-

lute maximum rating conditions for extended

periods may affect device reliability.

Note:

1.

Minimum voltage is -0.6V DC which may

undershoot to -2.0V for pulses of less than 20

0.75V DC which may overshoot to +7.0V for

pulses of less than 20 ns.

Storage Temperature............................-65°C to +150°C

Voltage on Any Pin with

Respect to Ground ............................... -2.0V to +7.0V

(1)

Voltage on A9 with

V

Operating Modes

Notes:

1. X can be V

2. Refer to Programming Characteristics.

3. V

4. Two identifier bytes may be selected. All Ai inputs are held low (V

low (V

Mode/Pin

CE

OE

PGM

Ai

V

PP

Outputs

Read

V

IL

V

IL

Ai

X

D

OUT

Output Disable

X

V

IH

XXX

High Z

Standby

V

IH

X

XXX

High Z

V

IL

V

IH

V

IL

Ai

V

PP

D

IN

PGM Verify

V

IL

V

IL

V

IH

Ai

V

PP

D

OUT

PGM Inhibit

V

IH

XX

X

V

PP

High Z

Product Identification

(4)

X

A9 = V

H

(3)

A1 - A17 = V

IL

X

Identification Code