Overview
The PCF8523T/1,118 is a CMOS Real-Time Clock (RTC) and calendar chip produced by NXP USA Inc. This component is optimized for low power consumption, making it suitable for a variety of applications, especially those requiring precise timekeeping and low energy usage.
Key Specifications
| Specification | Value |
|---|---|
| Operating Voltage | 1.0 V to 5.5 V |
| Backup Current | Typical 150 nA at VDD = 3.0 V and Tamb = 25 °C |
| I²C Interface | 2 line bidirectional 1 MHz Fast-mode Plus (Fm+) |
| Oscillator Frequency | 32.768 kHz |
| Integrated Load Capacitors | Selectable for CL = 7 pF or CL = 12.5 pF |
| Interrupt and Clock Output | Open-drain interrupt and clock output pins |
| Package Type | TSSOP14 |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Key Features
- Provides year, month, day, weekday, hours, minutes, and seconds based on a 32.768 kHz quartz crystal
- Resolution: seconds to years
- Battery backup input pin and switch-over circuit
- Freely programmable timer and alarm with interrupt capability
- Oscillator stop detection function
- Internal Power-On Reset (POR)
- Programmable offset register for frequency adjustment
Applications
- Time keeping applications
- Battery powered devices
- Metering applications
Q & A
- What is the PCF8523T/1,118 used for? The PCF8523T/1,118 is used as a Real-Time Clock (RTC) and calendar in various applications requiring precise timekeeping.
- What is the operating voltage range of the PCF8523T/1,118? The operating voltage range is from 1.0 V to 5.5 V.
- How does the PCF8523T/1,118 handle power failures? It has a backup battery switch-over circuit that automatically switches to the battery supply when a power failure occurs.
- What type of I²C interface does the PCF8523T/1,118 use? It uses a 2 line bidirectional 1 MHz Fast-mode Plus (Fm+) I²C interface.
- Can the PCF8523T/1,118 generate interrupts? Yes, it has freely programmable timer and alarm functions with interrupt capability.
- What is the typical backup current of the PCF8523T/1,118? The typical backup current is 150 nA at VDD = 3.0 V and Tamb = 25 °C.
- Does the PCF8523T/1,118 have an oscillator stop detection function? Yes, it includes an oscillator stop detection function.
- What package type is the PCF8523T/1,118 available in? It is available in a TSSOP14 package.
- What is the moisture sensitivity level (MSL) of the PCF8523T/1,118? The MSL is 1 (Unlimited).
- Can the PCF8523T/1,118 be used in battery-powered devices? Yes, it is suitable for battery-powered devices due to its low power consumption.
