AT28HC256E-70TU【PDF 1/24 页】IC EEPROM 256KBIT 70NS 28TSOP

收藏本站

您好，
买卖IC网欢迎您。
请登录
免费注册

买卖IC网

Sheet目录313

[1页]2页 3页 4页 5页

Features

? Fast Read Access Time – 70 ns

? Automatic Page Write Operation

– Internal Address and Data Latches for 64 Bytes

– Internal Control Timer

Fast Write Cycle Times

– Page Write Cycle Time: 3 ms or 10 ms Maximum

– 1 to 64-byte Page Write Operation

Low Power Dissipation

– 80 mA Active Current

– 3 mA Standby Current

Hardware and Software Data Protection

DATA Polling for End of Write Detection

High Reliability CMOS Technology

– Endurance: 10 4 or 10 5 Cycles

– Data Retention: 10 Years

Single 5V ± 10% Supply

CMOS and TTL Compatible Inputs and Outputs

JEDEC Approved Byte-wide Pinout

Full Military and Industrial Temperature Ranges

Green (Pb/Halide-free) Packaging Option

256K (32K x 8)

High-speed

Parallel

EEPROM

AT28HC256

1. Description

The AT28HC256 is a high-performance electrically erasable and programmable read-

only memory. Its 256K of memory is organized as 32,768 words by 8 bits. Manufac-

tured with Atmel’s advanced nonvolatile CMOS technology, the AT28HC256 offers

access times to 70 ns with power dissipation of just 440 mW. When the AT28HC256

is deselected, the standby current is less than 5 mA.

The AT28HC256 is accessed like a Static RAM for the read or write cycle without the

need for external components. The device contains a 64-byte page register to allow

writing of up to 64 bytes simultaneously. During a write cycle, the address and 1 to 64

bytes of data are internally latched, freeing the addresses and data bus for other oper-

ations. Following the initiation of a write cycle, the device will automatically write the

latched data using an internal control timer. The end of a write cycle can be detected

by DATA Polling of I/O7. Once the end of a write cycle has been detected a new

access for a read or write can begin.

Atmel’s 28HC256 has additional features to ensure high quality and manufacturability.

The device utilizes internal error correction for extended endurance and improved

data retention characteristics. An optional software data protection mechanism is

available to guard against inadvertent writes. The device also includes an extra

64 bytes of EEPROM for device identification or tracking.

0007N–PEEPR–9/09

发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

*型号	*数量	厂商	批号	封装

添加更多采购

采购需求

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

我的联系方式