Overview
The NXP PCF2127AT/2Y is a highly accurate Real Time Clock (RTC) and calendar integrated circuit designed for industrial applications. It features a Temperature Compensated Crystal (Xtal) Oscillator (TCXO) which ensures high precision timekeeping. The device is equipped with power management functions, including battery switch-over, battery low detection, and extra power fail detection, making it reliable in various power conditions. The PCF2127AT/2Y is packaged in a 20-pin SOIC (Small Outline Integrated Circuit) package and supports both I2C and SPI interfaces for communication.
Key Specifications
| Attribute | Value |
|---|---|
| Date Format | DW:DM:M:Y |
| Time Format | HH:MM:SS |
| Interface | I2C/SPI |
| Non-Volatile Memory Size | 512B |
| Supply Voltage-Nom | 1.8V to 4.2V |
| Temperature Grade | Industrial |
| Operating Temp Range | -40°C to +85°C |
| Storage Temperature Range | -55°C to +85°C |
| Moisture Sensitivity Level | 3 |
| Package Style | SOIC-20 |
| Mounting Method | Surface Mount |
Key Features
- Integrated Temperature Compensated Crystal (Xtal) Oscillator (TCXO) for high accuracy timekeeping.
- Battery switch-over function to automatically switch to backup battery during power failure.
- Battery low detection function to monitor the status of the backup battery.
- Extra power fail detection function to monitor the voltage at the power fail input pin.
- Support for both I2C and SPI interfaces.
- 512 bytes of non-volatile memory.
- Industrial temperature range operation from -40°C to +85°C.
Applications
The NXP PCF2127AT/2Y is suitable for a variety of industrial applications where accurate timekeeping is crucial. These include:
- Industrial automation systems.
- Medical devices requiring precise timing.
- Aerospace and defense systems.
- Automotive systems, especially those requiring backup power during engine shutdown.
- Smart meters and other utility monitoring devices.
Q & A
- What is the primary function of the NXP PCF2127AT/2Y?
The primary function is to serve as a Real Time Clock (RTC) and calendar with high accuracy timekeeping. - What interfaces does the PCF2127AT/2Y support?
The device supports both I2C and SPI interfaces. - What is the temperature range for the PCF2127AT/2Y?
The operating temperature range is -40°C to +85°C, and the storage temperature range is -55°C to +85°C. - Does the PCF2127AT/2Y have power management functions?
Yes, it includes battery switch-over, battery low detection, and extra power fail detection functions. - What type of package is the PCF2127AT/2Y available in?
The device is packaged in a 20-pin SOIC (Small Outline Integrated Circuit) package. - How much non-volatile memory does the PCF2127AT/2Y have?
The device has 512 bytes of non-volatile memory. - What is the purpose of the integrated TCXO in the PCF2127AT/2Y?
The integrated TCXO ensures high precision timekeeping by compensating for temperature variations. - Can the PCF2127AT/2Y operate with a backup battery?
Yes, it has a battery switch-over function to automatically switch to a backup battery during power failure. - How does the battery low detection function work?
The function monitors the status of the backup battery and sets a flag when the battery voltage drops below a threshold value. - What is the moisture sensitivity level of the PCF2127AT/2Y?
The moisture sensitivity level is 3.
