Description
The PCF85263A is a highly integrated CMOS Real-Time Clock (RTC) and calendar designed for low-power operation and reliability. A standout feature of this device is its automatic power-fail detection and seamless switching to a battery backup source upon main power loss. In addition to standard timekeeping, the PCF85263A can be configured as a stopwatch (elapsed time counter) and includes three dedicated time-log registers triggered by battery switch-over or external events.
This versatile IC provides two independent interrupt signals, two programmable alarms, and a flexible quartz crystal calibration register for precise frequency tuning. Communication is handled via an I²C-bus interface. Housed in an industry-standard SOIC-8 package, the PCF85263A is a robust choice for sophisticated applications ranging from consumer electronics and industrial automation to automotive systems where battery-backed reliability is mandatory.
Key Features
- Automatic Battery Backup: Integrated power-fail detection switches seamlessly to a backup battery when main power drops.
- Versatile Functionality: Functions as both a calendar/clock and an elapsed time counter (stopwatch).
- Event Logging: Includes three time-log registers triggered by either power state changes or external inputs.
- Programmable Alarms: Features two independent alarms and two independent interrupt signals for flexible system triggering.
- Calibration: On-chip register allows for accurate quartz crystal calibration.
- Wide Voltage Range: Operates efficiently from 900mV to 5.5V.
Application
- Industrial Automation: Reliable time-stamping for data logging and event synchronization in noisy environments.
- Portable Electronics: Optimized for low-power consumption to extend battery life in handheld devices.
- Automotive Systems: Robust timing solution for systems requiring continuous operation during power cycles.
- Consumer Electronics: Versatile enough for smart home devices, appliances, and general-purpose embedded hardware.
Package Includes
- 1 x PCF85263AT/AJ Real-Time Clock & Calendar IC (SOIC-8)
Technical Specifications
| Parameter | Specification |
|---|---|
| Device | PCF85263AT/AJ |
| Calendar/Clock Format | YYYY:MM:WK:DD:hh:mm:ss / Binary |
| Interface | I²C |
| Supply Voltage | 900mV – 5.5V |
| Package Type | SOIC-8 |
| Shipping Weight | 0.003 kg |
| Shipping Dimensions | 5 × 4 × 1 cm |
Note: Product images are shown for illustrative purposes only and may differ from the actual product. For complete technical parameters, please refer to the official device datasheet.
