NXP USA Inc. PCF8593T/1,118

Description
The PCF8593 is a CMOS clock and calendar circuit designed for low power consumption. It communicates via the two-line bidirectional I²C-bus. The built-in word address register automatically increments after each written or read data byte. The first 8 bytes of the RAM are used for clock, calendar, and counter functions. The next 8 bytes can be programmed as alarm registers or used as free RAM space.

Features
I²C-bus interface with operating supply voltage range of 2.5 V to 6.0 V
Clock operating supply voltage range of 1.0 V to 6.0 V at 0 °C to 70 °C
8 bytes of scratchpad RAM (when alarm not used)
Data retention voltage range of 1.0 V to 6.0 V
External RESET input for resetting the I²C interface
Operating current of typically 1 μA (at fscL=0 Hz, 32 kHz time base, Voo = 2.0 V)
Clock function with four-year calendar
Universal timer with alarm and overflow indication
24-hour or 12-hour format
32.768 kHz or 50 Hz time base
Programmable alarm, timer, and interrupt function
Space-saving SO8 package available
Slave addresses: A3h for reading, A2h for writing

Applications
Timekeeping and calendar functions
Alarm and timer applications
Data logging and storage
Industrial control and automation
Consumer electronics