Design Files
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Real-Time Clock and Calendar with 8 B RAM
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.
Product Details
Features
- 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 ℃ to +70 ℃
- 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 fSCL = 0 Hz, 32 kHz time base, VDD = 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
- Follower addresses: A3h for reading, A2h for writing
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Documentation
Quick reference to our documentation types.
1-5 of 9 documents
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Data Sheet
Low power clock and calendar
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User Guide
I2C-bus specification and user manual
Design Resources
Engineering Services
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Independent Design House (IDH)
Hardware Design Services
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Independent Design House (IDH)
NFC hardware design review and consulting
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Independent Design House (IDH)
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