NXP Semiconductors PCF2131 Nano-Power Highly Accurate RTC
NXP Semiconductors PCF2131 Nano-Power Highly Accurate Real-Time Clock (RTC) features an integrated Temperature Compensated Crystal (Xtal) Oscillator (TCXO) and a 32.768kHz quartz crystal. The PCF2131 is optimized for very high accuracy and ultra-low power consumption. The PCF2131 offers a selectable I2C-bus or SPI-bus, a backup battery switch-over circuit, a programmable watchdog function, four timestamps function, and many other features.
The NXP PCF2131 Nano-Power Highly Accurate RTC has an operating temperature range from -40°C to +85°C in an HLSON 16 package.
Features
- Operating temperature range from -40°C to +85°C
- Temperature Compensated Crystal Oscillator (TCXO) with trimmed integrated capacitors
- Ultra-low supply current of typical 64nA at VDD = 3.3V
- Temperature-compensated RTC, typical accuracy ±3ppm from -40°C to +85°C
- Integration of a 32.768kHz quartz crystal and oscillator in the same package
- Provides year, month, day, weekday, hours, minutes, seconds, and 1/100 seconds
- Provides leap year correction
- Timestamp function
- With interrupt capability
- Detection of four different events on four input pins (for example, for tamper detection)
- 2-line bidirectional 400kHz Fast-mode I2C-bus interface
- 4-line SPI-bus with separate data input and output (maximum speed 6.5Mbit/s)
- Battery backup input pin and switch-over circuitry
- Battery backed output voltage
- Battery low detection function
- Power-On Reset (POR)
- Power-On Reset Override (PORO) function
- Software reset function
- Two interrupt outputs (open-drain)
- Programmable 1 second or 1-minute interrupt
- Programmable watchdog timer with interrupt
- Programmable alarm function with interrupt capability
- Programmable square output
- Clock operating voltage of 1.2V to 5.5V
Applications
- Electronic metering for electricity, water, and gas
- Precision timekeeping
- Access to accurate time of the day
- GPS equipment to reduce time to first fix
- Applications that require an accurate process timing
- Products with long automated unattended operation time
Associated Boards
NXP Semiconductors PCF2131-ARD Evaluation Board
Ideal evaluation and demo board for the PCF2131 Nano-Power Highly Accurate Real-Time Clock.
NXP Semiconductors Bảng mạch phát triển MCIMX93-QSB
Nền tảng để đánh giá Bộ xử lý ứng dụng i.MX 93 đặt trong vỏ 9 mm x 9 mm.
Block Diagram
Đã phát hành: 2021-08-31
| Đã cập nhật: 2024-10-08