Datasheet > 27C020

27C020

更新时间： 2024-11-23 22:44:59

品牌	Logo	应用领域
超微 - AMD		可编程只读存储器电动程控只读存储器
页数	文件大小	规格书
12页	165K
描述
2 Megabit (256 K x 8-Bit) CMOS EPROM

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27C020 数据手册

FINAL

Am27C020

2 Megabit (256 K x 8-Bit) CMOS EPROM

DISTINCTIVE CHARACTERISTICS

■ Fast access time

■ Single +5 V power supply

— Speed options as fast as 55 ns

■ Low power consumption

■ ±10% power supply tolerance standard

■ 100% Flashrite™ programming

— Typical programming time of 32 seconds

— 100 µA maximum CMOS standby current

■ JEDEC-approved pinout

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

V_CC+ 1 V

— Plug in upgrade of 1 Mbit EPROM

— Easy upgrade from 28-pin JEDEC EPROMs

■ High noise immunity

■ Compact 32-pin DIP, PDIP, and PLCC packages

GENERAL DESCRIPTION

The Am27C020 is a 2 Megabit, ultraviolet erasable pro-

grammable read-only memory. It is organized as 256

Kwords 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 100 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 32 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

PGM#

Gating

Decoder

A0–A17

Address

Inputs

2,097,152

Bit Cell

Matrix

Decoder

11507H-1

Publication# 11507 Rev: H Amendment/0

Issue Date: May 1998

12 3 4 5 6 7...12

中文翻译

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