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Technical Datasheet:
PCF8583P   Datasheet
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Product Overview

The PCF8583P is a Clock and Calendar Chip, based on a 2048 bit static CMOS RAM organized as 256 words by 8 bits. 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. Address pin A0 is used for programming the hardware address, allowing the connection of two devices to the bus without additional hardware. The built-in 32.768kHz oscillator circuit and the first 8bytes of the RAM are used for the clock, calendar and counter functions. The next 8bytes can be programmed as alarm registers or used as free RAM space. The remaining 240bytes are free RAM locations.
  • 50µA Maximum Operating current (at fSCL = 0Hz)
  • Clock function with four year calendar
  • Universal timer with alarm and overflow indication
  • 24- or 12-hour format
  • 32.768kHz or 50Hz time base
  • Serial input and output bus (I²C-bus)
  • Automatic word address incrementing


Clock & Timing


ESD sensitive device, take proper precaution while handling the device.

Product Information

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Technical Documents (2)

CAD Downloads


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CAD Models - Notice
CAD Models and drawings are provided to you on a revocable limited licence for your internal use only but remain the property of the manufacturer who retain all intellectual property rights and ownership. They are provided to assist you in decision making and as design guide but are not guaranteed to be error free, accurate or up to date and is not intended to be taken as advice.
Use of these CAD models and other options provided are downloaded and used entirely at your own risk and by continuing you confirm acceptance of the above.

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