PCF8583 is a clock/calendar IC from Philips Semiconductors. It has 240×8 bits RAM and can be used as counter, alarm, timer and event counter.
The PCF8583 is a CMOS clock/calendar integrated circuit that includes a 32.768 kHz oscillator, a 240‑byte low‑voltage RAM and an I²C‑bus interface. It supports four‑year calendar operation, programmable alarms, timers and a 50 Hz time base.
The document provides a full feature list, pin configuration, functional block diagram, electrical characteristics, package options (DIP‑8 and SOP‑8) and handling guidelines for soldering and reflow processes.
| I²C‑bus supply voltage | 2.5 V to 6 V |
|---|---|
| Clock supply voltage (0 °C to +70 °C) | 1.0 V to 6.0 V |
| RAM size | 240 × 8‑bit (240 bytes) |
| Oscillator time base | 32.768 kHz or 50 Hz |
| Operating temperature range | -40 °C to +85 °C |
| Storage temperature range | -65 °C to +150 °C |
| Package – DIP‑8 | PCF8583P, 8‑lead plastic dual in‑line |
The I²C‑bus interface operates from 2.5 V to 6 V.
It provides 240 bytes of 8‑bit low‑voltage RAM.
The device can use a 32.768 kHz crystal‑oscillator or a 50 Hz time base.
It is offered in a DIP‑8 (PCF8583P) and an SOP‑8 (PCF8583T) plastic package.