Datasheet > CAT28C257PA-12

CAT28C257PA-12

更新时间： 2024-10-26 23:39:47

品牌	Logo	应用领域
其他 - ETC		内存集成电路光电二极管可编程只读存储器电动程控只读存储器电可擦编程只读存储器
页数	文件大小	规格书
11页	76K
描述
x8 EEPROM

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中文翻译

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数据手册

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CAT28C257PA-12 数据手册

CAT28C257

256K-Bit CMOS PARALLEL EEPROM

FEATURES

■ Automatic page write operation:

–1 to 128 Bytes in 5ms

–Page load timer

■ Fast read access times: 90/120/150 ns

■ Low power CMOS dissipation:

–Active: 25 mA max.

■ 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 EEPROM 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

advanced 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 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. 1015, Rev. A

12 3 4 5 6 7...11

中文翻译

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