Overview
The PCF2127AT/1,512, produced by NXP USA Inc., is a highly accurate Real Time Clock (RTC) and calendar module designed for industrial applications. It features an integrated Temperature Compensated Crystal (Xtal) Oscillator (TCXO) and a 32.768 kHz quartz crystal, ensuring very high accuracy and low power consumption. This device is equipped with 512 bytes of general-purpose static RAM, a selectable I²C-bus or SPI-bus interface, and various power management functions, making it versatile for a range of applications.
Key Specifications
| Specification | Value |
|---|---|
| Operating Temperature Range | −40°C to +85°C |
| Accuracy | ±3 ppm from −15°C to +60°C (PCF2127AT), ±3 ppm from −30°C to +80°C (PCF2127T) |
| Interface | Selectable I²C-bus or SPI-bus |
| RAM | 512 bytes of general-purpose static RAM |
| Quartz Crystal Frequency | 32.768 kHz |
| Power Management | Battery switch-over, battery low detection, extra power fail detection |
| Package | SO20 |
| Environmental Compliance | PbFree, EU RoHS, Halogen Free |
Key Features
- Integrated Temperature Compensated Crystal Oscillator (TCXO) with integrated capacitors
- 512 bytes of general-purpose static RAM, battery-backed
- Selectable I²C-bus or SPI-bus interface
- Programmable watchdog function
- Timestamp function with interrupt capability and detection of two different events on one multilevel input pin
- Battery backup input pin and switch-over circuitry
- Battery low detection function and extra power fail detection function
- Oscillator stop detection function and power-on reset override (PORO)
- Interrupt output (open-drain)
Applications
The PCF2127AT/1,512 is suitable for various industrial applications where high accuracy and reliability in timekeeping are crucial. These include:
- Industrial control systems
- Automated systems requiring precise timing
- Data loggers and monitoring devices
- Security systems with tamper detection
- Any application requiring low power consumption and high accuracy in time and date tracking
Q & A
- What is the operating temperature range of the PCF2127AT/1,512?
The operating temperature range is from −40°C to +85°C. - What is the accuracy of the PCF2127AT/1,512?
The accuracy is ±3 ppm from −15°C to +60°C for the PCF2127AT and ±3 ppm from −30°C to +80°C for the PCF2127T. - What interfaces does the PCF2127AT/1,512 support?
The device supports both I²C-bus and SPI-bus interfaces. - How much RAM does the PCF2127AT/1,512 have?
The device has 512 bytes of general-purpose static RAM. - What is the frequency of the quartz crystal in the PCF2127AT/1,512?
The frequency of the quartz crystal is 32.768 kHz. - Does the PCF2127AT/1,512 have power management functions?
Yes, it includes battery switch-over, battery low detection, and extra power fail detection functions. - What package type is the PCF2127AT/1,512 available in?
The device is available in an SO20 package. - Is the PCF2127AT/1,512 environmentally compliant?
Yes, it is PbFree, EU RoHS, and Halogen Free compliant. - What is the purpose of the timestamp function in the PCF2127AT/1,512?
The timestamp function allows for the detection of two different events on one multilevel input pin, useful for tamper detection and other applications. - Is the PCF2127AT/1,512 still recommended for new designs?
No, the PCF2127 is not recommended for new designs; instead, use the replacement part PCA2131TF.
