PCA2125TS/1,118

Real Time Clock Overview

The PCA2125TS/1,118 is a CMOS real-time clock and calendar optimized for low power consumption, operating within a voltage range of 1.3 V to 5.5 V and temperatures up to 125 °C. It features an SPI bus interface with a maximum data rate of 6.0 Mbit/s. The device provides year, month, day, weekday, hours, minutes, and seconds based on a 32.768 kHz quartz crystal. Key specifications include a typical backup current of 0.55 μA at VDD = 3.0 V and Tamb = 25 °C. It includes integrated oscillator capacitors, internal power-on reset, and open-drain interrupt capabilities.

Real Time Clock Feature Summary

• SPI bus interface supporting up to 6.0 Mbit/s data rate
• Low backup current: typical 0.55 μA at VDD = 3.0 V and Tamb = 25 °C
• Programmable alarm and timer functions with interrupt capability
• Integrated oscillator capacitor and internal power-on reset

Real Time Clock Applications

• Automotive time keeping applications
• Metering systems

Real Time Clock Procurement Notes

Verify the ordering suffix ,118 against official NXP documentation to confirm packaging details. Ensure compatibility with existing SPI interface designs regarding voltage levels and pin configurations. Check for end-of-life status or alternative sourcing requirements as supply chain conditions may vary.

Real Time Clock Selection Notes

Select this component for applications requiring low-power RTC functionality with SPI connectivity. Ensure the system operates within the 1.3 V to 5.5 V supply range. Consider the AEC-Q100 qualification if automotive reliability standards are required. Verify that the TSSOP-14 package fits the PCB layout constraints.

Real Time Clock Part Context

The PCA2125 is part of NXP's real-time clock family, designed for precise timekeeping in embedded systems. It distinguishes itself through its SPI interface and low-power characteristics, making it suitable for battery-backed applications. The device integrates essential timing functions into a compact package, reducing external component count.

Real Time Clock Replacement Considerations

Consult NXP datasheets for direct replacements or pin-compatible alternatives. Verify electrical parameters and interface compatibility before substitution. No specific substitute part numbers are confirmed in the provided source material.