PCF8564AU/5BB/1,01

Real Time Clock Overview

The PCF8564AU/5BB/1,01 is a bare die CMOS real-time clock and calendar optimized for low power consumption. It provides year, month, day, weekday, hours, minutes, and seconds based on a 32.768 kHz quartz crystal. The device features a wide clock operating voltage of 1.0 V to 5.5 V with a typical back-up current of 250 nA at 3.0 V and 25 °C. It includes a 400 kHz two-wire I²C interface (operating from 1.8 V to 5.5 V), a low-voltage detector, alarm and timer functions, and two integrated oscillator capacitors. A programmable clock output supports frequencies of 32.768 kHz, 1.024 kHz, 32 Hz, and 1 Hz.

Real Time Clock Feature Summary

• CMOS RTC and calendar providing timekeeping based on a 32.768 kHz quartz crystal
• Wide clock operating voltage range of 1.0 V to 5.5 V with low back-up current (typical 250 nA at 3.0 V)
• 400 kHz two-wire I²C bus interface compatible with voltages from 1.8 V to 5.5 V
• Programmable clock output offering 32.768 kHz, 1.024 kHz, 32 Hz, and 1 Hz signals

Real Time Clock Applications

• Timing devices including time-of-day tracking and process timing
• Portable instruments requiring low power operation
• Electronic metering systems
• Battery powered products

Real Time Clock Procurement Notes

Verify the specific ordering suffix /5BB/1,01 against the manufacturer's documentation to confirm it corresponds to an unsawn wafer delivery form. Ensure that the bare die package type matches the intended assembly requirements for the target application.

Real Time Clock Selection Notes

Select this component when a bare die solution is required for space-constrained designs. Confirm compatibility with the system's I²C bus voltage levels, as the interface operates between 1.8 V and 5.5 V. Verify that the external circuitry can support the necessary supply voltage range of 1.0 V to 5.5 V.

Real Time Clock Part Context

This part belongs to the PCF8564A family of real-time clocks and calendars. The AU designation indicates a bare die wire bond configuration with nine bonding pads. The suffix /5BB/1,01 specifies the sales item and delivery form as an unsawn wafer.

Real Time Clock Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.