Microchip Technology 4K/16k I2C串行EERAM

Microchip 4K/16K I2C串行EERAM设有带EEPROM备份的4/16Kb SRAM。该款4K/16K EERAM组织为512 x 8位或2048 x 8位内存，利用I2C串行接口。该EEPROM单元提供针对数据的高耐久性非易失性存储，且器件支持对SRAM的无限次读写循环。在断电情况下，借助外部电容器，SRAM数据将自动传输到EEPROM。借助硬件Store引脚或软件控制，可以手动传输数据。上电或借助软件控制时，EEPROM数据会自动回读到SRAM。该款4K/16K I2C Serial EERAM串行EERAM采用8引脚SOIC、PDIP和TSSOP封装。

The Microchip Technology 4K/16K I²C Serial EERAMs are available in 8-lead SOIC, PDIP, and TSSOP packages.

特性

4Kbit/16Kbit SRAM with EEPROM backup:
- Internally organized as 512 x 8bits (47 x 04) or 2048 x 8bits (47 x 16)
- Automatic Store to EEPROM array upon power-down (using optional external capacitor)
- Automatic Recall to SRAM array upon power-up
- Hardware Store pin for manual Store operations
- Software commands for initiating Store and Recall operations
- Store time 8ms maximum (47 x 04) or 25ms maximum (47 x 16)
Nonvolatile external event detect flag
High reliability:
- Infinite read and write cycles to SRAM
- More than one million Store cycles to EEPROM
- Data retention: >200 years
- ESD protection: >4,000V

High-speed I²C interface:
- Industry-standard 100kHz, 400kHz and 1MHz
- Zero cycle delay reads and writes
- Schmitt Trigger inputs for noise suppression
- Cascadable up to four devices
Write protection:
- Software write protection from 1/64 of SRAM array to whole array
Low-power CMOS technology:
- 200μA active current typical
- 40μA standby current (maximum)
8-lead PDIP, SOIC, and TSSOP packages
Available temperature ranges:
- Industrial (I): -40°C to +85°C
- Automotive (E): -40°C to +125°C