Description
The PCF85063AT/AAZ is a sophisticated CMOS Real-Time Clock (RTC) and calendar IC, optimized for ultra-low power consumption in resource-constrained applications. It maintains accurate timekeeping—including years, months, days, weekdays, hours, minutes, and seconds—using an external 32.768 kHz quartz crystal. A key advantage of this device is the programmable offset register, which allows for precise software-based frequency calibration to ensure long-term timing accuracy.
Communication is handled via a two-line, bidirectional I²C-bus at data rates up to 400 kbit/s, with automatic register address incrementing to facilitate efficient data access. Designed for versatility, the IC includes selectable oscillator load capacitors, a programmable clock output for peripheral synchronization, and a range of power-management features like an internal Power-On Reset (POR). Housed in a compact SOIC-8 package, it is an ideal choice for portable instruments, IoT nodes, and any battery-operated system requiring reliable, high-precision timing.
Key Features
- High-Precision Calibration: Integrated programmable offset register allows for fine-tuning of the clock frequency.
- Flexible Integration: Selectable internal load capacitors (7pF or 12.5pF) for the quartz crystal.
- Wide Voltage Range: Operates from 0.9V to 5.5V, making it highly suitable for low-voltage battery-operated systems.
- Programmable Outputs: Offers multiple frequency outputs (from 1Hz up to 32.768kHz) for system peripherals.
- Advanced Diagnostics: Includes oscillator stop detection, alarm functions, and a countdown timer.
- Ultra-Low Current: Typical current consumption of 0.22µA at 3.3V (25°C).
Application
- IoT & Connected Devices: Energy-efficient timing for remote sensor nodes and low-power hardware.
- Portable Instrumentation: Reliable clock reference for handheld test and measurement equipment.
- Battery-Powered Electronics: Ideal for devices where battery life is a critical design constraint.
- Embedded Systems: Provides stable, configurable time and interrupt services for microcontrollers.
Package Includes
- 1 x PCF85063AT/AAZ RTC and Calendar IC (SOIC-8)
Technical Specifications
| Parameter | Specification |
|---|---|
| Device | PCF85063AT/AAZ |
| Date/Clock Format | YY-MM-DD-dd / HH:MM:SS |
| Interface | I²C (up to 400 kbit/s) |
| Supply Voltage | 900mV – 5.5V |
| Package Type | SOIC-8 |
| Operating Temp | -40°C to +85°C |
| Shipping Weight | 0.001 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.
