NXP Semiconductors PCF2129
The PCF2129 is a CMOS1 Real Time Clock (RTC) and calendar with an integrated Temperature Compensated Crystal (Xtal) Oscillator (TCXO) and a 32.768 kHz quartz crystal optimized for very high accuracy and very low power consumption. The PCF2129 has a selectable I2C-bus or SPI-bus, a backup battery switch-over circuit, a programmable watchdog function, a timestamp function, and many other features.| Part No. | PCF2129 |
|---|---|
| Datasheet | PCF2129 Download |
| Manufacturer |  NXP Semiconductors |
| Description | Accurate RTC |
| Buy | Stock & Price |
FEATURES AND BENEFITS
● UL Recognized Component (PCF2129AT and PCF2129T)● Operating temperature range from -40 °C to +85 °C
● Temperature Compensated Crystal Oscillator (TCXO) with integrated capacitors
● Typical accuracy: – PCF2129AT: ±3 ppm from -15 °C to +60 °C – PCF2129T: ±3 ppm from -30 °C to +80 °C
● Integration of a 32.768 kHz quartz crystal and oscillator in the same package
● Provides year, month, day, weekday, hours, minutes, seconds, and leap year correction
● Timestamp function – with interrupt capability – detection of two different events on one multilevel input pin (for example, for tamper detection)
● Two line bidirectional 400 kHz Fast-mode I2C-bus interface
● Three line SPI-bus with separate data input and output (maximum speed 6.5 Mbit/s)
● Battery backup input pin and switch-over circuitry
● Battery backed output voltage
● Battery low detection function
● Power-On Reset Override (PORO)
● Oscillator stop detection function
● Interrupt output (open-drain)
● Programma...
