AT28HC256E-12SI datasheet(1/12 Pages) ATMEL

Part #	AT28HC256E-12SI

Description	256 32K x 8 High Speed CMOS E2PROM

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Manufacturer	ATMEL [ATMEL Corporation]

Direct Link	http://www.atmel.com

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AT28HC256

256 (32K x 8)

High Speed

CMOS

E

2PROM

Features

• Fast Read Access Time - 70 ns

• Automatic Page Write Operation

Internal Address and Data Latches for 64-Bytes

Internal Control Timer

• Fast Write Cycle Times

Page Write Cycle Time: 3 ms or 10 ms Maximum

1 to 64-Byte Page Write Operation

• Low Power Dissipation

80 mA Active Current

3 mA Standby Current

• Hardware and Software Data Protection

• DATA Polling for End of Write Detection

• High Reliability CMOS Technology

Endurance: 10

4 or 105 Cycles

Data Retention: 10 Years

• Single 5V ± 10% Supply

• CMOS and TTL Compatible Inputs and Outputs

• JEDEC Approved Byte-Wide Pinout

• Full Military, Commercial, and Industrial Temperature Ranges

Description

The AT28HC256 is a high-performance Electrically Erasable and Programmable

Read Only Memory. Its 256K of memory is organized as 32,768 words by 8 bits.

Manufactured with Atmel’s advanced nonvolatile CMOS technology, the AT28HC256

offers access times to 70 ns with power dissipation of just 440 mW. When the

AT28HC256 is deselected, the standby current is less than 5 mA.

(continued)

Note: PLCC package pins 1 and

17 are DON’T CONNECT.

CERDIP, PDIP,

FLATPACK

Top View

LCC, PLCC

Top View

Pin Name

Function

A0 - A14

Addresses

CE

Chip Enable

OE

Output Enable

WE

Write Enable

I/O0 - I/O7

Data Inputs/Outputs

NC

No Connect

DC

Don’t Connect

Pin Configurations

TSOP

Top View

PGA

Top View

0007F

AT28HC256

2-279

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AT28HC256E-12SI Datasheet(PDF) 1 Page - ATMEL Corporation

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