PCA8565AU/5BB/1,01

Real Time Clock Overview

The PCA8565AU/5BB/1,01 is a CMOS Real-Time Clock (RTC) and calendar die 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 operates with a clock voltage of 1.8 V to 5.5 V and supports an extended temperature range from -40 °C to +125 °C. Communication occurs via a two-line bidirectional I²C-bus with a maximum speed of 400 kbit/s. Key features include programmable clock outputs, alarm/timer functions, integrated oscillator capacitors, and an internal Power-On Reset.

Real Time Clock Feature Summary

• AEC-Q100 compliant for automotive applications
• Low backup current: typical 0.65 μA at VDD = 3.0 V and Tamb = 25 °C
• Programmable clock output for peripheral devices (32.768 kHz, 1.024 kHz, 32 Hz, and 1 Hz)
• Two integrated oscillator capacitors and internal Power-On Reset (POR)

Real Time Clock Applications

• Automotive systems
• Industrial equipment requiring wide operating temperature ranges

Real Time Clock Procurement Notes

This item is a wire bond die supplied as an unsawn wafer with a thickness of 280 μm. Verification should confirm the sales item number 93528 9264015 and ensure handling procedures accommodate bare die requirements rather than standard packaged components.

Real Time Clock Selection Notes

Select this part when integrating RTC functionality into custom substrates or flip-chip assemblies. The die format requires external bonding and substrate design. Ensure the application board supports the 1.8 V to 5.5 V supply range and utilizes a 32.768 kHz external crystal connected to the OSC pins.

Real Time Clock Part Context

The PCA8565AU is the die variant of the PCA8565A family. While the PCA8565TS offers a TSSOP8 package, the AU version provides the underlying silicon for custom packaging solutions. It shares identical electrical specifications and register maps with the packaged counterparts.

Real Time Clock Replacement Considerations

For packaged replacements, consider the PCA8565TS/1,118. Verify that the target application can accommodate the TSSOP8 footprint if transitioning from the bare die form factor.