The CAT24C21J is a 2-Kb Serial CMOS EEPROM (Electrically Erasable Programmable Read-Only Memory) device organized as 256 bytes of 8 bits each. This device features a low voltage and low power operation, making it suitable for a wide range of applications.

Applications

• Consumer electronics
• Industrial control systems
• Medical devices
• Automotive electronics
• Data storage

Features

• 2-Kb Serial EEPROM
• Low-voltage operation: 1.8V to 5.5V
• Low power CMOS technology
• Schmitt trigger inputs for noise immunity
• 2-wire serial interface: I2C compatible
• Write protect feature for entire memory
• Self-timed write cycle
• High reliability with endurance of 1,000,000 cycles
• Data retention: 100 years
• Available in various packages like SOIC, TSSOP, and TDFN

Benefits

• Low power consumption extends battery life in portable applications.
• I2C interface simplifies integration with microcontrollers and other I2C-compatible devices.
• Write protect feature prevents accidental data corruption.
• High endurance ensures reliable operation over a long lifespan.
• Small package sizes allow for use in space-constrained applications.

Additional Details

The CAT24C21J utilizes a 2-wire serial interface, supporting both standard (100 kHz) and fast (400 kHz) I2C bus speeds. The device supports byte write and page write operations, with a page size of 16 bytes. The self-timed write cycle typically completes within 5 ms, and the device includes a write cycle completion detect feature. The EEPROM is designed to operate over a wide temperature range, typically from -40°C to +85°C, making it suitable for harsh environments. The device is available in various industry-standard packages, providing flexibility in mounting options.