24LC21T/SN

The Microchip Technology 24LC21T/SN is a 1Kbit Electrically Erasable PROM (EEPROM) designed for applications requiring serial data storage and transmission. This device utilizes a 2-wire serial interface bus compatible with I2C standards, allowing for efficient communication.

Key electrical specifications include a memory size of 1Kbit organized as 128 x 8 bits, an operating voltage range of 2.5V to 5.5V, and a clock frequency of up to 400kHz. It offers a fast access time of 900 ns and a write cycle time of 10ms. The device operates within a commercial temperature range of 0°C to 70°C.

Packaged in an 8-SOIC surface-mount configuration, the 24LC21T/SN is suitable for various electronic designs. It features low power consumption with a typical active current of 1mA and a standby current of 10µA at 5.5V. The EEPROM ensures high data integrity with 1,000,000 erase/write cycles and data retention exceeding 200 years.

This EEPROM supports DDC1/DDC2 interfaces for monitor identification and operates in both Transmit-only and Bidirectional modes. Upon power-up, it defaults to Transmit-only mode, sending memory contents clocked by the VCLK pin. A high-to-low transition on the SCL pin initiates Bidirectional mode for byte-selectable read/write operations.