The PCA2129T/Q900/2,51 is an automotive accurate Real Time Clock with an integrated temperature compensated crystal (Xtal) oscillator (TCXO) and a 32.768kHz quartz crystal optimized for very high accuracy and very low power consumption. This has a selectable I2C-bus or SPI-bus, a backup battery switch-over circuit, a programmable watchdog function and a timestamp function.
- Two line bidirectional 400kHz Fast-mode I2C-bus interface
- 3 Line SPI-bus with separate data input and output
- Battery backup input pin and switch-over circuitry
- Battery low detection function
- Power-on reset override
- Oscillator stop detection function
计量, 时钟与计时, 通信与网络, 自动化与过程控制
