AT28HC256 256Kbit,并行EEPROMs存储器

Density 256K
Organization 32K x 8
Speed 70, 90, 120 ns
Vcc (V) 4.5-5.5
Packages FLAT PACK 28
LCC 32
PDIP 28
PGA 28
PLCC 32
CERDIP 28
SOIC (300mil) 28
TSOP 28
Pb-Free
Packages
PLCC 32
SOIC (300mil) 28
TSOP 28

256K EEPROM with 64-Byte Page Software Protection

The AT28HC256 is a high-performance electrically erasable and programmable readonly memory. Its 256K of memory is organized as 32,768 words by 8 bits. Manufactured 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 operations. 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.

AT28HC256 特征
AT28HC256 订购型号
tACC
(ns)
ICC (mA) Ordering Code Package Operation Range
Active Standby
70 80 0.3 AT28HC256-70JU 32J Industrial
(-40° to 85°C)
AT28HC256-70SU 28S
AT28HC256-70TU 28T
90 80 0.3 AT28HC256-90JU 32J
AT28HC256E-90JU
AT28HC256F-90JU
AT28HC256-90SU 28S
AT28HC256E-90SU
AT28HC256F-90SU
AT28HC256-90TU 28T
AT28HC256E-90TU
AT28HC256F-90TU
120 80 0.3 AT28HC256-12JU 32J
AT28HC256E-12JU
AT28HC256F-12JU
AT28HC256-12SU 28S
AT28HC256E-12SU
AT28HC256F-12SU
AT28HC256-12TU 28T
AT28HC256E-12TU
AT28HC256F-12TU
AT28BHC256 应用技术支持与电子电路设计开发资源下载
  1. ATMEL 爱特梅尔EEPROM存储器AT28HC256 数据手册DataSheet 下载. PDF(完整版)
  2. 并行EEPROM 存储器参数选型指南(Excel 文档格式)
  3. EEPROM 存储器参数选型指南
  4. 中文版 ATMEL 汽车应用解决方案 . pdf
  5. 英文版 ATMEL 汽车应用解决方案 . pdf
  6. 嵌入式系统中EEPROM文件系统的设计与实现 . PDF
  7. ATMEL 爱特梅尔公司全线产品目录. pdf