Datasheet > AM28F020-90JCB

AM28F020-90JCB

更新时间： 2024-11-04 23:00:27

品牌	Logo	应用领域
超微 - AMD		闪存
页数	文件大小	规格书
35页	483K
描述
2 Megabit (256 K x 8-Bit) CMOS 12.0 Volt, Bulk Erase Flash Memory

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AM28F020-90JCB 数据手册

FINAL

Am28F020

2 Megabit (256 K x 8-Bit)

CMOS 12.0 Volt, Bulk Erase Flash Memory

■

Latch-up protected to 100 mA from

–1 V to V_CC+1 V

DISTINCTIVE CHARACTERISTICS

■

High performance

■

Flasherase Electrical Bulk Chip Erase

— One second typical chip erase time

Flashrite Programming

— Access times as fast as 70 ns

CMOS low power consumption

— 30 mA maximum active current

— 100 µA maximum standby current

— No data retention power consumption

■

— 10 µs typical byte program time

— 4 s typical chip program time

■

Command register architecture for

microprocessor/microcontroller compatible

write interface

■

Compatible with JEDEC-standard byte-wide

32-pin EPROM pinouts

— 32-pin PDIP

■

On-chip address and data latches

— 32-pin PLCC

Advanced CMOS flash memory technology

— Low cost single transistor memory cell

Automatic write/erase pulse stop timer

— 32-pin TSOP

■

10,000 write/erase cycles minimum

■

Write and erase voltage 12.0 V 5%

GENERAL DESCRIPTION

The Am28F020 is a 2 Megabit Flash memory orga-

nized as 256 Kbytes of 8 bits each. AMD’s Flash mem-

ories offer the most cost-effective and reliable read/

write non-volatile random access memory. The

Am28F020 is packaged in 32-pin PDIP, PLCC, and

TSOP versions. It is designed to be reprogrammed and

erased in-system or in standard EPROM programmers.

The Am28F020 is erased when shipped from

the factory.

gramming mechanisms. In addition, the combination of

advanced tunnel oxide processing and low internal

electric fields for erase and programming operations

produces reliable cycling. The Am28F020 uses a

12.0±5% V_PPsupply input to perform the Flasherase

and Flashrite functions.

The highest degree of latch-up protection is achieved

with AMD’s proprietary non-epi process. Latch-up pro-

tection is provided for stresses up to 100 mA on

address and data pins from –1 V to V_CC+1 V.

The standard Am28F020 offers access times of as fast

as 70 ns, allowing high speed microprocessors to

operate without wait states. To eliminate bus conten-

tion, the device has separate chip enable (CE#) and

output enable (OE#) controls.

The Am28F020 is byte programmable using 10 µs

programming pulses in accordance with AMD’s

Flashrite programming algorithm. The typical room

temperature programming time of the Am28F020 is

four seconds. The entire chip is bulk erased using 10

ms erase pulses according to AMD’s Flasherase

algorithm. Typical erasure at room temperature is

accomplished in less than one second. The windowed

package and the 15–20 minutes required for EPROM

erasure using ultraviolet light are eliminated.

AMD’s Flash memories augment EPROM functionality

with in-circuit electrical erasure and programming. The

Am28F020 uses a command register to manage this

functionality, while maintaining a JEDEC-standard 32-

pin pinout. The command register allows for 100% TTL

level control inputs and fixed power supply levels during

erase and programming, while maintaining maximum

EPROM compatibility.

Commands are written to the command register using

standard microprocessor write timings. Register con-

tents serve as input to an internal state-machine, which

controls the erase and programming circuitry. During

write cycles, the command register internally latches

AMD’s Flash technology reliably stores memory con-

tents even after 10,000 erase and program cycles. The

AMD cell is designed to optimize the erase and pro-

Publication# 14727 Rev: F Amendment/+2

Issue Date: January 1998

12 3 4 5 6 7...35

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与AM28F020-90JCB相关器件

型号	品牌	获取价格	描述	数据表
AM28F020-90JE	AMD	获取价格	2 Megabit (256 K x 8-Bit) CMOS 12.0 Volt, Bulk Erase Flash Memory
AM28F020-90JEB	AMD	获取价格	2 Megabit (256 K x 8-Bit) CMOS 12.0 Volt, Bulk Erase Flash Memory
AM28F020-90JI	AMD	获取价格	2 Megabit (256 K x 8-Bit) CMOS 12.0 Volt, Bulk Erase Flash Memory
AM28F020-90JIB	AMD	获取价格	2 Megabit (256 K x 8-Bit) CMOS 12.0 Volt, Bulk Erase Flash Memory
AM28F020-90LC	ETC	获取价格	x8 Flash EEPROM
AM28F020-90PC	AMD	获取价格	2 Megabit (256 K x 8-Bit) CMOS 12.0 Volt, Bulk Erase Flash Memory
AM28F020-90PCB	AMD	获取价格	2 Megabit (256 K x 8-Bit) CMOS 12.0 Volt, Bulk Erase Flash Memory
AM28F020-90PE	AMD	获取价格	2 Megabit (256 K x 8-Bit) CMOS 12.0 Volt, Bulk Erase Flash Memory
AM28F020-90PE	ROCHESTER	获取价格	Flash, 256KX8, 90ns, PDIP32, PLASTIC, DIP-32
AM28F020-90PEB	AMD	获取价格	2 Megabit (256 K x 8-Bit) CMOS 12.0 Volt, Bulk Erase Flash Memory

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