NXP PCF2127AT/1,518 Real-Time Clock (RTC)

The NXP PCF2127AT/1,518 is a highly accurate Real-Time Clock (RTC) and calendar optimized for low power consumption and with a wealth of features for timekeeping. This integrated circuit (IC) is designed to provide precise time and date information, and it includes a battery backup input to maintain accurate timekeeping when main power to the device is interrupted.

The PCF2127AT/1,518 offers a wide voltage range, operating from 1.3 V to 5.5 V, making it suitable for a variety of applications including industrial control systems, metering, and other embedded systems. Its low power consumption is ideal for battery-operated devices, ensuring minimal impact on battery life.

Key Features:

• High Accuracy: The device features a temperature-compensated crystal oscillator (TCXO) with a frequency offset of ±3 ppm from -40°C to +85°C, which translates to a time deviation of less than 2 minutes per year.
• Flexible Timekeeping: It supports a wide range of timekeeping formats including seconds, minutes, hours, days, weekdays, months, and years, with automatic leap year correction up to the year 2099.
• Alarm and Timer Functions: The RTC includes an integrated alarm function that can be programmed to trigger on a minute, hour, day, or weekday basis. It also features a countdown timer for additional time management.
• Power Management: The device includes an integrated power management system that switches automatically to the backup battery when necessary, and a battery low detection circuit.
• Communication Interface: The IC is equipped with both I²C-bus and SPI-bus interfaces for easy integration into a variety of systems.
• Additional Features: The PCF2127AT/1,518 also offers a programmable clock output, programmable timer, and a programmable offset register for frequency adjustment.

This RTC is available in a small TSSOP16 package, which is suitable for space-constrained applications. The product's part number, PCF2127AT/1,518, indicates the package type and quantity in which it is shipped, with this variant typically supplied in tape and reel format for automated assembly processes.

Whether for consumer electronics, automotive, telecommunications, or industrial applications, the NXP PCF2127AT/1,518 provides a reliable and versatile solution for maintaining accurate time and date, ensuring system reliability and performance.