Real Time Clock Serial 9-Pin DIE Wafer

The PCF8564A is a CMOS real-time clock and calendar optimized for low power consumption. A programmable clock output, interrupt output and voltage low detector are also provided. All addresses and data are transferred serially via a two-line bidirectional I²C-bus. Maximum bus speed is 400 kbit/s. The built-in word address register is incremented automatically after each written or read data byte.

• Provides year, month, day, weekday, hours, minutes, and seconds based on a 32.768 kHz quartz crystal
• Wide clock operating voltage: 1.0 V to 5.5 V
• Low back-up current typical 250 nA at 3.0 V and 25 ?
• 400 kHz two-wire I²C interface (1.8 V to 5.5 V)
• Low-voltage detector
• Alarm and timer functions
• Two integrated oscillator capacitors
• Programmable clock output for peripheral devices (32.768 kHz, 1.024 kHz, 32 Hz, and 1 Hz)
• Internal Power-On Reset (POR)
• I²C slave address: read A3h, write A2h