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PCF8583 Clock and Calendar Chip
A versatile clock and calendar chip with I2C-bus interface and low-voltage RAM.
- Operating Supply Voltage: 2.5 V to 6 V
- Clock Operating Supply Voltage (0 to +70°C): 1.0 V to 6.0 V
- RAM: 240×8-bit low-voltage
- Data Retention Voltage: 1.0 V to 6 V
- Operating Current (at fSCL= 0 Hz): max. 50µA
Top Features:
- I2C-bus interface
- Four year calendar
- Universal timer with alarm
- 32.768 kHz time base
The PCF8583 is a clock and calendar chip that utilizes a 2048 bit static CMOS RAM organized as 256 words by 8 bits. It operates via a two-line bidirectional I2C-bus for serial data transfer. The built-in word address register automatically increments after each data byte operation. Address pin A0 allows for hardware address programming, enabling connection of two devices without extra hardware.
The chip features a built-in 32.768 kHz oscillator circuit for clock, calendar, and counter functions. The first 8 bytes of RAM serve these functions, while the next 8 bytes can be used as alarm registers or free RAM space. The remaining 240 bytes are designated as free RAM locations.
- Clock Function: Four year calendar
- Timer: Universal timer with alarm and overflow indication
- Format: 24 or 12 hour
- Time Base: 32.768 kHz or 50 Hz
- Bus: Serial I2C
- Addressing: Automatic word address incrementing
- Functions: Programmable alarm, timer, and interrupt
- Slave Address: READ: A1 or A3, WRITE: A0 or A2
Package Includes:
- 1 x PCF8583P Real Time Clock (RTC) and Calendar IC DIP-8 Package
Images are for illustration only; actual product may vary.