PCA8565BS/1,118

Real Time Clock Overview

The PCA8565BS/1,118 is a 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 operates with a clock voltage range of 0.9 V to 5.5 V at room temperature and supports an extended operating temperature range from -40 °C to +125 °C. It features a typical current consumption of 0.65 µA at VDD = 3.0 V and Tamb = 25 °C. Communication occurs via a 400 kHz two-wire I²C-bus interface.

Real Time Clock Feature Summary

• Provides complete timekeeping (year, month, day, weekday, hours, minutes, seconds) using a 32.768 kHz quartz crystal
• Operates within a wide voltage range of 0.9 V to 5.5 V and temperature range of -40 °C to +125 °C
• Features low backup current consumption, typically 0.65 µA at VDD = 3.0 V and 25 °C
• Includes programmable clock output (32.768 kHz, 1.024 kHz, 32 Hz, 1 Hz), alarm functions, and timer functions

Real Time Clock Applications

• Automotive systems
• Industrial equipment requiring wide temperature operation
• Battery-powered devices needing low standby current

Real Time Clock Procurement Notes

Verify the specific suffix 'BS' against official NXP documentation, as standard ordering information lists 'TS' (TSSOP8). Confirm package type and marking codes match project requirements. Ensure I²C address compatibility (Read A3h, Write A2h) with the host controller.

Real Time Clock Selection Notes

Select this component for applications requiring precise timekeeping with minimal power drain. The integrated oscillator capacitor simplifies PCB layout. Verify that the supply voltage remains within the 0.9 V to 5.5 V range across all operating conditions. Consider the open-drain interrupt pin configuration for system integration.

Real Time Clock Part Context

The PCA8565 series includes variants such as PCA8565TS in TSSOP8 packages. The BS suffix may indicate a specific tape-and-reel or packaging variant not explicitly detailed in the primary datasheet table, which lists PCA8565TS/1,118. Cross-reference with NXP's official ordering guide to confirm physical dimensions and reel specifications.

Real Time Clock Replacement Considerations

PCA8565TS/1,118 is a direct functional equivalent within the same family. Ensure the replacement matches the required package style and voltage specifications.