PCF2127AT/2Y

Accurate real-time clock with an integrated temperature-compensated crystal oscillator, battery backup, and 512-byte RAM.

PCF8523T/1,118

Low-power real-time clock and calendar with an I2C interface and battery switchover.

PCF8523TK/1,118

Low-power real-time clock and calendar with an I2C interface and battery switchover.

PCF8563T/F4,118

Low-power real-time clock and calendar with a serial I2C interface.

PCF8593T/1,118

Real-time clock and calendar with an I2C interface and eight bytes of RAM.