Overview
The PCF2123BS/1,518 is a CMOS Real-Time Clock (RTC) and calendar device produced by NXP USA Inc. This component is optimized for low power applications and is part of the PCF2123 series. It provides a comprehensive set of features for time-keeping, alarms, and timer functions, making it suitable for a variety of applications requiring precise time management.
Key Specifications
| Attribute | Specification |
|---|---|
| Interface | 3-Wire SPI |
| Supply Voltage (Nominal) | 1.1 V to 5.5 V |
| Temperature Grade | Industrial |
| Package Style | HVQFN-16 |
| Mounting Method | Surface Mount |
| Backup Current | Typical 100 nA at VDD = 2.0 V and Tamb = 25 ℃ |
| Oscillator Frequency | 32.768 kHz |
| Integrated Load Capacitors | CL = 7 pF |
| Serial Interface Data Rate | Up to 6.25 Mbit/s |
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: typical 100 nA at VDD = 2.0 V and Tamb = 25 ℃.
- Resolution from seconds to years.
- Watchdog functionality.
- Freely programmable timer and alarm with interrupt capability.
- Clock operating voltage: 1.1 V to 5.5 V.
- 3-line SPI-bus with separate, but combinable data input and output.
- 1 second or 1 minute interrupt output.
- Internal Power-On Reset (POR).
- Open-drain interrupt and clock output pins.
- Programmable offset register for frequency adjustment.
Applications
- Time keeping applications.
- Battery powered devices.
- Metering.
- High duration timers.
- Daily alarms.
- Low standby power applications.
Q & A
- What is the PCF2123BS/1,518?
The PCF2123BS/1,518 is a CMOS Real-Time Clock (RTC) and calendar device optimized for low power applications.
- What is the operating voltage range of the PCF2123BS/1,518?
The operating voltage range is from 1.1 V to 5.5 V.
- What type of interface does the PCF2123BS/1,518 use?
The device uses a 3-Wire SPI interface.
- What is the typical backup current of the PCF2123BS/1,518?
The typical backup current is 100 nA at VDD = 2.0 V and Tamb = 25 ℃.
- Does the PCF2123BS/1,518 have integrated load capacitors?
Yes, it has integrated oscillator load capacitors for CL = 7 pF.
- What are the common applications of the PCF2123BS/1,518?
Common applications include time keeping, battery powered devices, metering, high duration timers, daily alarms, and low standby power applications.
- Does the PCF2123BS/1,518 have watchdog functionality?
Yes, it includes watchdog functionality.
- Can the timer and alarm be programmed on the PCF2123BS/1,518?
Yes, the timer and alarm are freely programmable with interrupt capability.
- Is the PCF2123BS/1,518 RoHS compliant?
Yes, the device is RoHS compliant and lead-free.
- What is the package style of the PCF2123BS/1,518?
The package style is HVQFN-16, and it is surface mountable.
