Advance Information W27LE520

Publication Release Date: 4/26/2000

- 3 -

Revision A1

An EPROM's power switching characteristics require careful device decoupling. System designers are

transient current peaks produced by the falling and rising edges of ALE Transient current magnitudes

depend on the device output's capacitive and inductive loading. Proper decoupling capacitor selection

will suppress transient voltage peaks. Each device should have a

0.1

inductance capacitor should be placed as close as possible to the device. Additionally, for every eight

devices, a 4.7

µF electrolytic capacitor should be placed at the array's power supply connection

inductances.

TABLE OF OPERATING MODES

MODE

PIN

ALE

OTHER ADDRESS

AD[7:0]

Address Latch Enable

X

A[7:0]

Read

Output Disable

X

High Z

Standby

A[7:0]

Program

Erase 1

X

Erase 2

First command:

Addr. = 5555 (hex)

AA(hex)

Secon command:

Addr. = 2AAA (hex)

10(hex)

Product Identifier-

manufacturer

DA(Hex)

Product Identifier-device

1F(Hex)