PCF8564AUG/12HB/1V

Real Time Clock Overview

The PCF8564AUG/12HB/1V 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 and a low backup current typical 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 programmable clock output, alarm and timer functions, integrated oscillator capacitors, and an internal Power-On Reset.

Real Time Clock Feature Summary

• Provides timekeeping based on a 32.768 kHz quartz crystal with century flag
• Wide operating voltage range: 1.0 V to 5.5 V; Low backup current: 250 nA typical at 3.0 V
• 400 kHz I²C-bus interface with slave addresses A2h (write) and A3h (read)
• Programmable clock output (32.768 kHz, 1.024 kHz, 32 Hz, 1 Hz) and interrupt output
• Integrated low-voltage detector and internal Power-On Reset (POR)

Real Time Clock Applications

• Timing devices including time-of-day tracking and process timing
• Portable instruments
• Electronic metering
• Battery powered products

Real Time Clock Procurement Notes

Verify the specific ordering suffix /12HB/1V against the manufacturer's documentation to confirm delivery form details. The source indicates this part number corresponds to a wafer sawn on an 8-inch metal FFC with chips featuring soft bumps. Ensure compatibility with the required bump hardness and packaging specifications before procurement.

Real Time Clock Selection Notes

Select this component when a bare die RTC solution is required for space-constrained designs. Verify that the application supports wire bond or flip-chip integration given the bare die package type. Confirm that the system design can accommodate the external 32.768 kHz quartz crystal and the necessary I²C bus pull-up resistors.

Real Time Clock Part Context

The PCF8564A is part of NXP's CMOS real-time clock family, offering similar functionality to the PCF8563 but in a bare die format. This specific variant (PCF8564AUG) is supplied as a bare die with 9 bumps, distinct from packaged versions like the SO8 or TSSOP. It shares the same register map and electrical characteristics as other PCF8564A variants.

Real Time Clock Replacement Considerations

For packaged replacements, consider the PCF8563 or PCF8564A in SO8 or TSSOP packages if board space allows. Direct bare die substitutes are not explicitly listed in the provided documentation; verify availability of equivalent bare die RTCs from NXP or other manufacturers.