CAT28C256PA-12T datasheet, PDF

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CAT28C256PA-12T: Description128Kx8 EEPROM; Categoryaccessories; File Size516KB，12 Pages; ManufacturerCatalyst; Websitehttp://www.catalyst-semiconductor.com/

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CAT28C256PA-12T Overview

128Kx8 EEPROM

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CAT28C256

256K-Bit Parallel EEPROM

FEATURES

■

Fast read access times: 120/150ns

■

Low power CMOS dissipation:

GEN

ALO

■

Hardware and software write protection

■

Automatic page write operation:

–Active: 25 mA max

–Standby: 150

A max

■

Simple write operation:

–1 to 64 bytes in 5ms

–Page load timer

■

End of write detection:

–On-chip address and data latches

–Self-timed write cycle with auto-clear

■

Fast write cycle time:

–Toggle bit

–DATA polling

DATA

■

100,000 program/erase cycles

■

100 year data retention

■

Commerical, industrial and automotive

–5ms max

■

CMOS and TTL compatible I/O

temperature ranges

DESCRIPTION

The CAT28C256 is a fast, low power, 5V-only CMOS

parallel EEPROM organized as 32K x 8-bits. It requires a

simple interface for in-system programming. On-chip

address and data latches, self-timed write cycle with auto-

clear and V

power up/down write protection eliminate

additional timing and protection hardware.

DATA

Polling

and Toggle status bits signal the start and end of the self-

timed write cycle. Additionally, the CAT28C256 features

hardware and software write protection.

The CAT28C256 is manufactured using Catalyst’s ad-

vanced CMOS floating gate technology. It is designed to

endure 100,000 program/erase cycles and has a data

retention of 100 years. The device is available in JEDEC

approved 28-pin DIP, 28-pin TSOP or 32-pin PLCC

packages.

BLOCK DIAGRAM

A6–A14

ADDR. BUFFER

& LATCHES

INADVERTENT

WRITE

PROTECTION

ROW

DECODER

32,768 x 8

EEPROM

ARRAY

64 BYTE PAGE

VCC

HIGH VOLTAGE

GENERATOR

CONTROL

LOGIC

I/O BUFFERS

TIMER

DATA POLLING

AND

TOGGLE BIT

COLUMN

DECODER

I/O0–I/O7

A0–A5

ADDR. BUFFER

& LATCHES

Characteristics subject to change without notice

Doc. No. 1004, Rev. D

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