Overview
The PCF8523TS/1,112, produced by NXP USA Inc., is a CMOS Real-Time Clock (RTC) and calendar optimized for low power consumption. This component is designed to provide accurate timekeeping and is suitable for a variety of applications, including time-keeping devices and battery-powered systems. The PCF8523TS/1,112 features a 32.768 kHz quartz crystal oscillator and supports serial data transfer via an I2C-bus interface with a maximum data rate of 1000 kbit/s.
Key Specifications
| Specification | Value |
|---|---|
| Package | 14-TSSOP (0.173, 4.40mm width) |
| Operating Voltage | 1.0 V to 5.5 V |
| Operating Temperature | -40 °C to 85 °C |
| I2C Interface | 2 line bidirectional 1 MHz Fast-mode Plus (Fm+) |
| Oscillator Frequency | 32.768 kHz |
| Backup Current | Typical 150 nA at VDD = 3.0 V and Tamb = 25 °C |
| Integrated Load Capacitors | Selectable for CL = 7 pF or CL = 12.5 pF |
| Alarm and Timer Functions | Freely programmable with interrupt capability |
| Power-On Reset (POR) | Internal |
Key Features
- Provides year, month, day, weekday, hours, minutes, and seconds based on a 32.768 kHz quartz crystal
- Low backup current: typical 150 nA at VDD = 3.0 V and Tamb = 25 °C
- Battery backup input pin and switch-over circuit
- Freely programmable timer and alarm with interrupt capability
- Selectable integrated oscillator load capacitors for CL = 7 pF or CL = 12.5 pF
- Oscillator stop detection function
- Internal Power-On Reset (POR)
- Open-drain interrupt or clock output pins
- Programmable offset register for frequency adjustment
Applications
- Time-keeping applications
- Battery-powered devices
- Metering applications
Q & A
- What is the primary function of the PCF8523TS/1,112? The primary function is to provide accurate timekeeping and calendar information.
- What is the operating voltage range of the PCF8523TS/1,112? The operating voltage range is from 1.0 V to 5.5 V.
- What type of interface does the PCF8523TS/1,112 use for data transfer? It uses a 2 line bidirectional 1 MHz Fast-mode Plus (Fm+) I2C interface.
- What is the typical backup current of the PCF8523TS/1,112? The typical backup current is 150 nA at VDD = 3.0 V and Tamb = 25 °C.
- Does the PCF8523TS/1,112 have alarm and timer functions? Yes, it has freely programmable timer and alarm functions with interrupt capability.
- What are the selectable integrated oscillator load capacitors for the PCF8523TS/1,112? The selectable integrated oscillator load capacitors are for CL = 7 pF or CL = 12.5 pF.
- Does the PCF8523TS/1,112 have an internal Power-On Reset (POR)? Yes, it has an internal Power-On Reset (POR).
- What are the common applications of the PCF8523TS/1,112? Common applications include time-keeping, battery-powered devices, and metering applications.
- What is the maximum operating temperature of the PCF8523TS/1,112? The maximum operating temperature is 85 °C.
- What package type is the PCF8523TS/1,112 available in? It is available in a 14-TSSOP package.
