Overview
The PCA2129T/Q900/2,518 is a highly accurate Real Time Clock (RTC) and calendar module designed by NXP USA Inc. This component integrates a Temperature Compensated Crystal (Xtal) Oscillator (TCXO) and a 32.768 kHz quartz crystal, ensuring very high accuracy and low power consumption. It is particularly suited for automotive and other applications requiring precise timekeeping.
Key Specifications
| Parameter | Value |
|---|---|
| Operating Temperature Range | -40 °C to +85 °C |
| Supply Voltage | 1.8 V to 4.2 V |
| Typical Timekeeping Current | 0.70 μA at VDD = 3.3 V |
| Accuracy | ±3 ppm from -30 °C to +80 °C |
| Interface | Selectable I2C-bus (400 kHz) or SPI-bus (6.5 Mbit/s) |
| Package Type | SO16 plastic small outline package; 16 leads |
| Backup Battery Input | Backup battery switch-over circuit with battery low detection |
Key Features
- UL Recognized Component and AEC-Q100 compliant for automotive applications
- Integrated Temperature Compensated Crystal Oscillator (TCXO) with capacitors
- Timestamp function with interrupt capability for tamper detection
- Programmable watchdog timer and alarm function with interrupt capability
- Battery backup input pin and switch-over circuitry
- Battery low detection function and power-on reset override (PORO)
- Oscillator stop detection and interrupt output (open-drain)
- Programmable square wave output
Applications
- Electronic metering for electricity, water, and gas
- Precision timekeeping in various devices
- Access to accurate time of the day in multiple systems
- GPS equipment to reduce time to first fix
- Applications requiring accurate process timing and long automated unattended operation time
Q & A
- What is the PCA2129T/Q900/2,518 used for?
The PCA2129T/Q900/2,518 is used as a Real Time Clock (RTC) and calendar in applications requiring high accuracy and low power consumption, particularly in automotive and precision timekeeping scenarios.
- What is the operating temperature range of the PCA2129T/Q900/2,518?
The operating temperature range is from -40 °C to +85 °C.
- What interfaces does the PCA2129T/Q900/2,518 support?
The component supports both I2C-bus (400 kHz) and SPI-bus (6.5 Mbit/s) interfaces.
- Does the PCA2129T/Q900/2,518 have a backup battery feature?
Yes, it has a backup battery input pin and switch-over circuitry with battery low detection.
- What is the typical timekeeping current of the PCA2129T/Q900/2,518?
The typical timekeeping current is 0.70 μA at VDD = 3.3 V.
- Is the PCA2129T/Q900/2,518 compliant with automotive standards?
Yes, it is AEC-Q100 compliant for automotive applications.
- What is the accuracy of the PCA2129T/Q900/2,518?
The typical accuracy is ±3 ppm from -30 °C to +80 °C.
- Does the PCA2129T/Q900/2,518 have a programmable watchdog timer?
Yes, it has a programmable watchdog timer with interrupt capability.
- What package type does the PCA2129T/Q900/2,518 come in?
The component comes in a SO16 plastic small outline package with 16 leads.
- Does the PCA2129T/Q900/2,518 support timestamp functions?
Yes, it supports a timestamp function with interrupt capability for tamper detection.
