W27C020-12 Winbond, W27C020-12 Datasheet

W27C020-12

Manufacturer Part Number

W27C020-12

Description

256K X 8 ELECTRICALLY ERASABLE EPROM

Manufacturer

Winbond

Datasheet

1.W27C020-12.pdf (14 pages)

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GENERAL DESCRIPTION

The W27C020 is a high speed, low power Electrically Erasable and Programmable Read Only

Memory organized as 262144

provides an electrical chip erase function.

FEATURES

PIN CONFIGURATIONS

High speed access time:

70/90/120 nS (max.)

Read operating current: 30 mA (max.)

Erase/Programming operating current:

30 mA (max.)

Standby current: 1 mA (max.)

Single 5V power supply

GND

A12

Vpp

A16

A15

256K

4 3 2 1 3

32-pin PLCC

32-pin DIP

8 ELECTRICALLY ERASABLE EPROM

A10

PGM

A17

A14

A13

A11

Vcc

8 bits that operates on a single 5 volt power supply. The W27C020

A14

A13

A11

A10

- 1 -

BLOCK DIAGRAM

PIN DESCRIPTION

+14V erase/+12V programming voltage

Fully static operation

All inputs and outputs directly TTL/CMOS

compatible

Three-state outputs

Available packages: 32-pin 600 mil DIP and

PLCC

SYMBOL

A0 A17

Q0 Q7

PGM

GND

PGM

GND

A17

Publication Release Date: September 1998

Preliminary W27C020

Address Inputs

Data Inputs/Outputs

Chip Enable

Output Enable

Program Enable

Program/Erase Supply Voltage

Power Supply

Ground

CONTROL

DECODER

DESCRIPTION

OUTPUT

BUFFER

ARRAY

CORE

Revision A1

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