Description

The Microchip Technology Inc. 24LC21A is a 128 x 8-bit dual-mode Electrically Erasable PROM. This device is designed for use in applications requiring storage and serial transmission of configuration and control information. Two modes of operation have been implemented:

Transmit-only mode and Bidirectional mode. Upon power-up, the device will be in the Transmit-only mode, sending a serial bit stream of the memory array from 00h to 7Fh, clocked by the VCLK pin. A valid high-to-low transition on the SCL pin will cause the device to enter the transition mode, and look for a valid control byte on the I2C bus. If it detects a valid control byte from the master, it will switch into Bidirectional mode, with byte selectable read/write capability of the memory array using SCL. If no control byte is received, the device will revert to the Transmit-only mode after it receives 128 consecutive VCLK pulses while the SCL pin is idle. The 24LC21A is available in a standard 8-pin PDIP and SOIC package in both commercial and industrial temperature ranges.

Features

• Single supply with operation down to 2.5V

• Completely implements DDC1™/DDC2™ interface for monitor identification, including recovery to DDC1

• Pin and function compatible with 24LC21

• Low-power CMOS technology

- 1 mA typical active current

- 10 µA standby current typical at 5.5V

• 2-wire serial interface bus, I2C™ compatible

• 100 kHz (2.5V) and 400 kHz (5V) compatibility

• Self-timed write cycle (including auto-erase)

• Page write buffer for up to eight bytes

• 1,000,000 erase/write cycles ensured

• Data retention > 200 years

• ESD Protection > 4000V

• 8-pin PDIP and SOIC package

• Available for extended temperature ranges

- Commercial (C): 0°C to +70°C

- Industrial (I): -40°C to +85°C

24LC21A属于集成电路（IC） > 存储器。微芯科技股份有限公司制造生产的24LC21A存储器存储器是集成电路上用作数据存储设备的半导体器件。这些器件分为非易失性或易失性两种，格式包括 CBRAM、DRAM、EEPROM、EERAM、EPROM、闪存、FRAM、NVSRAM、PCM (PRAM)、PSRAM、RAM 和 SRAM。这些器件的存储容量为 64 b 至 6 Tb 不等，接口有 I2C、MMC、并行、eMMC、串行、单线、SPI、UFS、Xccela 总线和 1-线。