Overview
The PCF2123BS1512 is a CMOS Real-Time Clock (RTC) and calendar integrated circuit manufactured by NXP USA Inc. This device is optimized for low power applications and features a serial peripheral interface (SPI-bus) for data transfer. It is designed to provide accurate timekeeping with additional functionalities such as alarms, timers, and watchdog capabilities, making it suitable for a variety of applications requiring precise time management.
Key Specifications
| Parameter | Value |
|---|---|
| Operating Voltage | 1.1 V to 5.5 V |
| Backup Current | Typical 100 nA at VDD = 2.0 V and Tamb = 25 °C |
| Serial Interface | 3-line SPI-bus with separate, but combinable data input and output |
| Data Rate | Maximum 6.25 Mbit/s |
| Time Resolution | Seconds to years |
| Oscillator Frequency | 32.768 kHz |
| Package Type | HVQFN16 plastic thermal enhanced very thin quad flat package; no leads; 16 terminals; body 3 × 3 × 0.85 mm |
| Interrupt Output | 1 second or 1 minute interrupt output |
| Offset Register | Programmable offset register for frequency adjustment |
Key Features
- Real-time clock providing year, month, day, weekday, hours, minutes, and seconds based on a 32.768 kHz quartz crystal
- Low backup current for power efficiency
- Freely programmable timer and alarm with interrupt capability
- Watchdog functionality
- Integrated oscillator load capacitors for CL = 7 pF
- Internal Power-On Reset (POR)
- Open-drain interrupt and clock output pins
Applications
- Time keeping applications
- Battery powered devices
- Metering
- High duration timers
- Daily alarms
- Low standby power applications
Q & A
- What is the PCF2123BS1512?
The PCF2123BS1512 is a CMOS Real-Time Clock (RTC) and calendar integrated circuit optimized for low power applications. - What is the operating voltage range of the PCF2123BS1512?
The operating voltage range is from 1.1 V to 5.5 V. - How does the PCF2123BS1512 transfer data?
Data is transferred serially via a Serial Peripheral Interface (SPI-bus). - What is the maximum data rate of the SPI-bus?
The maximum data rate is 6.25 Mbit/s. - What are the key features of the PCF2123BS1512?
Key features include real-time clock, low backup current, programmable timer and alarm, watchdog functionality, and integrated oscillator load capacitors. - What are some common applications of the PCF2123BS1512?
Common applications include time keeping, battery powered devices, metering, high duration timers, daily alarms, and low standby power applications. - Does the PCF2123BS1512 have an internal Power-On Reset (POR)?
Yes, it has an internal Power-On Reset (POR). - Can the PCF2123BS1512 generate interrupt signals?
Yes, it can generate interrupt signals for alarms and timers. - What type of package does the PCF2123BS1512 come in?
The PCF2123BS1512 comes in an HVQFN16 plastic thermal enhanced very thin quad flat package. - Is the PCF2123BS1512 suitable for battery-powered devices?
Yes, it is suitable for battery-powered devices due to its low backup current.
