Datasheet > AM27C256-90PC

AM27C256-90PC

更新时间： 2024-11-15 22:56:31

品牌	Logo	应用领域
超微 - AMD		内存集成电路光电二极管 OTP只读存储器
页数	文件大小	规格书
12页	164K
描述
256 Kilobit (32 K x 8-Bit) CMOS EPRO

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中文翻译

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数据手册
替代型号

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AM27C256-90PC 数据手册

FINAL

Am27C256

256 Kilobit (32 K x 8-Bit) CMOS EPROM

DISTINCTIVE CHARACTERISTICS

■ Fast access time

■ Latch-up protected to 100 mA from –1 V to

V_CC+ 1 V

— Speed options as fast as 45 ns

■ Low power consumption

■ High noise immunity

■ Versatile features for simple interfacing

— Both CMOS and TTL input/output compatibility

— Two line control functions

— 20 µA typical CMOS standby current

■ JEDEC-approved pinout

■ Single +5 V power supply

■ Standard 28-pin DIP, PDIP, and 32-pin PLCC

■ ±10% power supply tolerance standard

■ 100% Flashrite™ programming

— Typical programming time of 4 seconds

packages

GENERAL DESCRIPTION

The Am27C256 is a 256-Kbit, ultraviolet erasable pro-

grammable read-only memory. It is organized as 32K

words by 8 bits per word, operates from a single +5 V

supply, has a static standby mode, and features fast

single address location programming. Products are

available in windowed ceramic DIP packages, as well

as plastic one time programmable (OTP) PDIP and

PLCC packages.

thus eliminating bus contention in a multiple bus micro-

processor system.

AMD’s CMOS process technology provides high

speed, low power, and high noise immunity. Typical

power consumption is only 80 mW in active mode, and

100 µW in standby mode.

All signals are TTL levels, including programming sig-

nals. Bit locations may be programmed singly, in

blocks, or at random. The device supports AMD’s

Flashrite programming algorithm (100 µs pulses), re-

sulting in a typical programming time of 4 seconds.

Data can be typically accessed in less than 55 ns, al-

lowing high-performance microprocessors to operate

without any WAIT states. The device offers separate

Output Enable (OE#) and Chip Enable (CE#) controls,

BLOCK DIAGRAM

Data Outputs

DQ0–DQ7

Output Enable

Chip Enable

and

OE#

CE#

Output

Buffers

Prog Logic

Gating

Decoder

A0–A14

Address

Inputs

262,144

Bit Cell

Matrix

Decoder

08007I-1

Publication# 08007 Rev: I Amendment/0

Issue Date: May 1998

12 3 4 5 6 7...12

中文翻译

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AM27C256-90PC 替代型号

型号	品牌	替代类型	描述	数据表
AT27C256R-90PC	ATMEL	功能相似	256K 32K x 8 OTP CMOS EPROM
M27C256B-90B1X	STMICROELECTRONICS	功能相似	256 Kbit (32Kb x 8) UV EPROM and OTP EPROM

与AM27C256-90PC相关器件

型号	品牌	获取价格	描述	数据表
AM27C256-90PI	AMD	获取价格	256 Kilobit (32 K x 8-Bit) CMOS EPRO
AM27C256-95DC	ETC	获取价格	x8 EPROM
AM27C256-95PC	ETC	获取价格	x8 EPROM
AM27C256DC	ETC	获取价格	x8 EPROM
AM27C256PC	ETC	获取价格	x8 EPROM
AM27C291-25DC	ETC	获取价格	x8 EPROM
AM27C291-35DC	ETC	获取价格	x8 EPROM
AM27C291-45DC	ETC	获取价格	x8 EPROM
AM27C400	AMD	获取价格	4 Megabit, ROM Compatible CMOS EPROM
AM27C400-100DC	ETC	获取价格	x8/x16 EPROM

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