25AA640屬于集成電路（IC）的存儲器。由微芯科技股份有限公司制造生產(chǎn)的25AA640存儲器存儲器是集成電路上用作數(shù)據(jù)存儲設(shè)備的半導(dǎo)體器件。這些器件分為非易失性或易失性兩種，格式包括 CBRAM、DRAM、EEPROM、EERAM、EPROM、閃存、FRAM、NVSRAM、PCM (PRAM)、PSRAM、RAM 和 SRAM。這些器件的存儲容量為 64 b 至 6 Tb 不等，接口有 I2C、MMC、并行、eMMC、串行、單線、SPI、UFS、Xccela 總線和 1-線。

DESCRIPTION

The Microchip Technology Inc. 25AA640/25LC640/25C640 (25xx640*) is a 64K bit serial Electrically Erasable PROM. The memory is accessed via a simple Serial Peripheral Interface (SPI) compatible serial bus. The bus signals required are a clock input (SCK) plus separate data in (SI) and data out (SO) lines. Access to the device is controlled through a chip select (CS) input.

Communication to the device can be paused via the hold pin (HOLD). While the device is paused, transitions on its inputs will be ignored, with the exception of chip select, allowing the host to service higher priority interrupts.

FEATURES

? Low power CMOS technology

- Write current: 3 mA typical

- Read current: 500 μA typical

- Standby current: 500 nA typical

? 8192 x 8 bit organization

? 32 byte page

? Write cycle time: 5ms max.

? Self-timed ERASE and WRITE cycles

? Block write protection

- Protect none, 1/4, 1/2, or all of array

? Built-in write protection

- Power on/off data protection circuitry

- Write enable latch

- Write protect pin

? Sequential read

? High reliability

- Endurance: 1M cycles (guaranteed)

- Data retention: > 200 years

- ESD protection: > 4000 V

? 8-pin PDIP, SOIC, and TSSOP packages

? Temperature ranges supported:

- Commercial: (C) 0°C to +70°C

- Industrial: (I) -40°C to +85°C

- Automotive: (E) (25C640) -40°C to +125°C