PCF8593 Datasheet, PDF (1/35 Pages) NXP Semiconductors – Low power clock/calendar

PCF8593
Low power clock and calendar
Rev. 04 — 6 October 2010
Product data sheet
1. General description
The PCF8593 is a CMOS¹ clock and calendar circuit, optimized for low power
consumption. Addresses and data are transferred serially via the two-line bidirectional
I²C-bus. The built-in word address register is incremented automatically after each written
or read data byte. The built-in 32.768 kHz oscillator circuit and the first 8 bytes of the RAM
are used for the clock, calendar, and counter functions. The next 8 bytes can be
programmed as alarm registers or used as free RAM space.
2. Features and benefits
„ I²C-bus interface operating supply voltage: 2.5 V to 6.0 V
„ Clock operating supply voltage 1.0 V to 6.0 V at 0 °C to +70 °C
„ 8 bytes scratchpad RAM (when alarm not used)
„ Data retention voltage: 1.0 V to 6.0 V
„ External RESET input resets I²C interface only
„ Operating current (at f_SCL = 0 Hz, 32 kHz time base, V_DD = 2.0 V): typical 1 μA
„ 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
„ Serial input and output bus (I²C-bus)
„ Automatic word address incrementing
„ Programmable alarm, timer, and interrupt function
„ Space-saving SO8 package available
„ Slave addresses: A3h for reading, A2h for writing
3. Ordering information
Table 1. Ordering information
Type number Package
Name
Description
PCF8593P
DIP8
plastic dual in-line package; 8 leads (300 mil)
PCF8593T
SO8
plastic small outline package; 8 leads;
body width 3.9 mm
Version
SOT97-1
SOT96-1
1. The definition of the abbreviations and acronyms used in this data sheet can be found in Section 14.