DS3231 hiBCTR High Precision RTC Module 3.3V/5V Dual Voltage 5 Pack

Description

Product Overview

The hiBCTR DS3231 Real Time Clock (RTC) module is engineered for industrial‑grade timing accuracy, offering a stability of plus minus 5 parts per million (ppm) across a temperature range of -40°C to +85°C. Built around the renowned DS3231 chip, the module integrates a 32.768 kHz crystal oscillator, a temperature‑compensated crystal oscillator (TCXO), and a battery backup socket for a CR2032 cell. This combination ensures that the clock maintains precise timekeeping even when power is lost, with a backup current draw of only 1.3 µA. The module operates on a wide voltage range of 2.3 V to 5.5 V, making it fully compatible with both 3.3 V and 5 V logic levels used by popular development platforms such as Arduino, Raspberry Pi, ESP32, and many others. No additional level shifters are required, simplifying circuit design and reducing overall system cost.

Usage

Designed for a broad spectrum of applications, this RTC module excels in data‑logging stations, environmental monitoring rigs, automation controllers, and Internet of Things (IoT) devices that require reliable timestamps. Its compact 20 × 15 mm footprint allows it to be placed on breadboards, perfboards, or custom PCBs with ease. The module’s I²C interface operates at up to 400 kHz, enabling fast communication with microcontrollers while preserving low‑power consumption. Whether you are building a weather station that records temperature and humidity every minute, a smart meter that timestamps energy usage, or a robotic system that synchronizes multiple actuators, the DS3231 provides the calendar functions—including leap‑year handling up to the year 2100—necessary for accurate long‑term operation.

Why Choose Us

hiBCTR is a trusted supplier of high‑reliability electronic components. Each RTC module undergoes rigorous testing for voltage tolerance, temperature stability, and timing precision before it leaves the factory. The inclusion of a CR2032 backup socket means that your system retains accurate time even during unexpected power outages, a feature often omitted in lower‑cost alternatives. Our five‑piece value pack provides a cost‑effective solution for projects that require multiple synchronized clocks, such as distributed sensor networks or multi‑node data acquisition systems. Additionally, we stand behind our products with responsive technical support and a clear return policy, ensuring that you receive both a quality component and peace of mind.

Key Features

• Industrial‑grade timing accuracy of plus minus 5 ppm for dependable performance
• Dual‑voltage operation (3.3 V / 5 V) eliminates the need for level shifters
• Integrated CR2032 backup socket preserves time during power loss
• Provides both 1 Hz and 32.768 kHz outputs for flexible timing needs
• Comes with five modules in a single pack, reducing overall cost for multi‑node projects
• Extensive temperature compensation from -40 °C to +85 °C ensures stability in harsh environments
• Responsive customer support and hassle‑free returns for added confidence

FAQ

Do I need a level shifter when using this module with a 5 V Arduino?

No. The module is designed to operate across a voltage range of 2.3 V to 5.5 V, so it can be directly connected to both 3.3 V and 5 V logic without additional circuitry.

What type of battery should I use for the backup socket?

A standard CR2032 lithium coin cell is recommended. The module draws only 1.3 µA in backup mode, allowing the battery to last for several years.

Can the module handle leap years?

Yes. The DS3231 chip includes built‑in leap‑year compensation and will correctly track the calendar up to the year 2100.

Is the I²C address configurable?

The default I²C address is 0x68, which is standard for DS3231 devices. It can be changed by modifying the address pins if multiple RTCs share the same bus.

What is the recommended way to mount the module on a PCB?

Because the module is surface‑mount ready, you can solder it directly onto a PCB using standard 2.54 mm pitch footprints. For prototyping, the pins are compatible with typical breadboard spacing.