AB-RTC-TH-32.768KHZ-2-T3

Overview

The Abracon AB-RTC-TH-32.768KHZ-2-T3 is a Real Time Clock (RTC) module featuring an integrated frequency-adjusted 32.768kHz crystal unit and I2C bus interface. It supports a supply voltage range of 1.6V to 5.5V with low current consumption, typically 1.0µA at 3.0V. The device includes a built-in temperature sensor, leap year autocorrection, alarm functions, and timer output capabilities. Operating within a temperature range of -40°C to +85°C, it provides high stability with ±5 ppm frequency accuracy. The component is housed in a compact 10-SMD, No Lead package.

Feature Summary

• Integrated 32.768kHz crystal unit with ±5 ppm stability across the operating temperature range
• Built-in temperature sensor with ±5°C accuracy at VDD=3.0V
• Low power consumption: typical 1.0µA at 3.0V and 4.9µA at 5.0V
• I2C communication interface supporting up to 400 kHz clock frequency

Applications

• IoT devices and wireless communication systems
• Medical instrumentation
• Utility meters
• Data loggers and consumer appliances

Procurement Notes

Verify the T3 suffix indicates a reel quantity of 3,000 pieces per manufacturer specifications. Confirm that the 10-SMD package dimensions align with PCB layout requirements. Ensure I2C pull-up resistors are selected appropriately for the target supply voltage between 1.6V and 5.5V. Check lead times and availability through authorized distributors as stock levels fluctuate.

Selection Notes

Select this RTC when a compact solution with an integrated crystal is required to save board space. The wide supply voltage range allows compatibility with various system architectures. Consider the ±5 ppm stability for applications requiring precise timekeeping without external temperature compensation. Verify that the I2C address and register map match the host microcontroller's software implementation.

Part Context

This part belongs to Abracon’s AB-RTC-TH series of real-time clock modules. These components are designed to replace discrete RTC ICs and separate crystals, simplifying design and reducing assembly steps. The TH variant specifically denotes the 10-SMD package configuration suitable for surface mount technology.

Replacement Considerations

Direct replacements must support I2C interface, similar voltage ranges, and comparable package dimensions. Verify pinout compatibility if substituting directly on existing boards. Check if alternative parts offer similar integrated crystal stability and current consumption profiles.