Overview
The PCF2127T/2Y is a highly accurate Real Time Clock (RTC) and calendar module manufactured by NXP USA Inc. This component is designed for industrial applications and features an integrated Temperature Compensated Crystal (Xtal) Oscillator (TCXO) and a 32.768 kHz quartz crystal, ensuring very high accuracy and low power consumption. The device operates within a temperature range of -40°C to +85°C, making it suitable for a wide range of environments.
Key Specifications
| Specification | Value |
|---|---|
| Package Type | SO16 (SOT162-1) |
| Number of Leads | 16 |
| Operating Voltage | 1.8 V to 4.2 V |
| Supply Current | Typical 0.70 μA at VDD = 3.3 V |
| Accuracy | Typical 3 ppm from 30°C to +80°C |
| Communication Interface | Selectable I2C-bus or SPI-bus |
| RAM | 512 bytes of general-purpose static RAM |
| Backup Battery | Battery backup input pin and switch-over circuitry |
| Power Management | Battery switch-over, battery low detection, extra power fail detection |
Key Features
- Temperature Compensated Crystal Oscillator (TCXO) with integrated capacitors
- Integrated 32.768 kHz quartz crystal and oscillator
- 512 bytes of general-purpose static RAM
- Timestamp function with interrupt capability
- Two-line bidirectional 400 kHz Fast-mode I2C-bus interface and 3-line SPI-bus
- Battery backed output voltage and battery low detection function
- Extra power fail detection function with input and output pins
- Programmable watchdog timer, alarm function, and square wave output pin
- Interrupt output (open-drain) and oscillator stop detection function
Applications
- Electronic metering for electricity, water, and gas
- Precision timekeeping
- GPS equipment to reduce time to first fix
- Applications requiring accurate process timing
- Products with long automated unattended operation time
Q & A
- What is the PCF2127T/2Y used for?
The PCF2127T/2Y is used as a Real Time Clock (RTC) and calendar module in various industrial applications requiring precise timekeeping. - What is the operating temperature range of the PCF2127T/2Y?
The operating temperature range is from -40°C to +85°C. - What communication interfaces does the PCF2127T/2Y support?
The PCF2127T/2Y supports both I2C-bus and SPI-bus interfaces. - How much RAM does the PCF2127T/2Y have?
The PCF2127T/2Y has 512 bytes of general-purpose static RAM. - What power management features does the PCF2127T/2Y have?
The device includes battery switch-over, battery low detection, and extra power fail detection functions. - What is the typical accuracy of the PCF2127T/2Y?
The typical accuracy is 3 ppm from 30°C to +80°C. - Does the PCF2127T/2Y support interrupts?
Yes, it supports various interrupt capabilities including timestamp, watchdog, alarm, and oscillator stop detection. - What is the supply current of the PCF2127T/2Y at 3.3 V?
The typical supply current is 0.70 μA at VDD = 3.3 V. - Is the PCF2127T/2Y RoHS compliant?
Yes, the PCF2127T/2Y is RoHS compliant. - What package type does the PCF2127T/2Y come in?
The PCF2127T/2Y comes in a SO16 (SOT162-1) package.
