Datasheet > CAT28C257HP-90T

CAT28C257HP-90T

更新时间： 2024-10-27 03:08:59

品牌	Logo	应用领域
CATALYST		可编程只读存储器
页数	文件大小	规格书
10页	79K
描述
256K-Bit CMOS PARALLEL E2PROM

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中文翻译

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CAT28C257HP-90T 数据手册

Advanced

CAT28C257

256K-Bit CMOS PARALLEL E²PROM

FEATURES

■ Automatic Page Write Operation:

–1 to 128 Bytes in 5ms

■ Fast Read Access Times: 90/120/150 ns

■ Low Power CMOS Dissipation:

–Active: 25 mA Max.

–Page Load Timer

■ End of Write Detection:

–Toggle Bit

–Standby: 150 µA Max.

■ Simple Write Operation:

–DATA Polling

–On-Chip Address and Data Latches

–Self-Timed Write Cycle with Auto-Clear

■ Hardware and Software Write Protection

■ 100,000 Program/Erase Cycles

■ 100 Year Data Retention

■ Fast Write Cycle Time:

–5ms Max

■ CMOS and TTL Compatible I/O

■ Commercial, Industrial and Automotive

Temperature Ranges

DESCRIPTION

The CAT28C257 is a fast, low power, 5V-only CMOS

Parallel E²PROM organized as 32K x 8-bits. It requires a

simple interface for in-system programming. On-chip

addressanddatalatches,self-timedwritecyclewithauto-

clear and V_CCpower 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 CAT28C257 features

hardware and software write protection.

The CAT28C257 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

32,768 x 8

E²PROM

ARRAY

ROW

DECODER

ADDR. BUFFER

A –A

& LATCHES

INADVERTENT

WRITE

PROTECTION

HIGH VOLTAGE

GENERATOR

128 BYTE PAGE

CONTROL

LOGIC

I/O BUFFERS

DATA POLLING

AND

TIMER

TOGGLE BIT

I/O –I/O

ADDR. BUFFER

& LATCHES

A –A

COLUMN

DECODER

5096 FHD F02

Characteristics subject to change without notice

Doc. No. 25073-00 2/98

12 3 4 5 6 7...10

中文翻译

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