Rochester Electronics Specialized ICs - PCA2129T/Q900/2 PCA2129T/Q900/2

The PCA2129T/Q900/2 is a CMOS Real Time Clock (RTC) designed for automotive applications, featuring an integrated Temperature Compensated Crystal Oscillator (TCXO) and a 32.768 kHz quartz crystal. It operates within a temperature range of -40 ¬8C to +85 ¬8C and offers a typical accuracy of ¬±3 ppm from -30 ¬8C to +80 ¬8C. The device supports both I¬=C-bus and SPI-bus interfaces, with a maximum SPI speed of 6.5 Mbit/s and a Fast-mode I¬=C-bus interface capable of 400 kHz. Key functionalities include a backup battery switch-over circuit, programmable watchdog timer, timestamp function with interrupt capability, and various alarm functions. The PCA2129T/Q900/2 is UL Recognized and AEC-Q100 compliant, making it suitable for use in automotive environments. It operates at a voltage range of 1.8 V to 4.2 V and has a low supply current of approximately 0.70 OºA at 3.3 V, which is beneficial for battery-powered applications. This product is ideal for applications requiring precise timekeeping, such as electronic metering and GPS equipment.