PCF8583P/F5,112

Real Time Clock Overview

The PCF8583P/F5,112 is a clock and calendar chip based on 2048-bit static CMOS RAM organized as 256 words by 8 bits. It features an I²C-bus interface with operating supply voltages of 2.5 V to 6 V for general operation and 1.0 V to 6.0 V for clock functions at 0 °C to +70 °C. The device includes 240 × 8-bit low-voltage RAM, data retention down to 1.0 V, and a maximum operating current of 50 μA at fSCL = 0 Hz. It supports a four-year calendar, universal timer with alarm, and programmable interrupt functions via the serial bus.

Real Time Clock Feature Summary

• I²C-bus interface supporting slave addresses A1h/A3h for reading and A0h/A2h for writing
• Integrated 32.768 kHz oscillator circuit or support for 50 Hz time base input
• 240-byte free RAM space available when alarm registers are disabled
• Programmable alarm, timer, and interrupt functions with open-drain INT output

Real Time Clock Applications

• Consumer channel number display systems
• Teletext and Broadcast Antiope applications
• Building automation I/O controllers requiring time-stamping

Real Time Clock Procurement Notes

Verify component authenticity through authorized NXP distributors. Confirm package type matches DIP8 (PCF8583P) specifications. Check manufacturing date codes against availability requirements as this product may be subject to discontinuation notices.

Real Time Clock Selection Notes

Select PCF8583P for through-hole mounting in DIP8 packages. Ensure system voltage aligns with the 2.5 V to 6 V operating range. Consider external crystal loading capacitance if utilizing the internal oscillator for precise timing applications.

Real Time Clock Part Context

This part belongs to the PCF8583 family, which also includes SO8 (PCF8583T) and HVQFN20 (PCF8583BS) variants. All versions share identical functional specifications but differ in physical packaging and pin configurations.

Real Time Clock Replacement Considerations

No direct public substitute part numbers are documented in the provided datasheet. Evaluate alternative RTC ICs based on I²C compatibility and RAM size requirements.