PCF2129 devices are "Not Recommended for New Designs", please use the replacement part PCA2131TF.
The PCF2129 is a CMOS 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.
Participating products are available for a minimum of 10 years. Designated participating products developed for the automotive, telecom and medical segments are available for a minimum of 15 years.
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Part | Order | CAD Model | resolution | Interface | VDD (interface) | watchdog timer | Programmable alarm | countdown timer | VDD (clock) | Special features | leap year tracking | IDD (nA) | temperature compensation | AEC-Q100 compliant |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1 sec to year | I2C, SPI | 1.8 to 4.2 | yes | yes | no | 1.8 to 4.2 | — | yes | 700 | yes | no | |||
1 sec to year | I2C, SPI | 1.8 to 4.2 | yes | yes | no | 1.8 to 4.2 | wide temp range of compensation | yes | 700 | yes | no |
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