1. Product Parameters ( )​​

​​Input Voltage:​​ 2.4V-5.5V DC (Wide Voltage Compatible)

​​Humidity Measurement Range:​​ 0% to 100% RH (Full Range)

​​Humidity Accuracy:​​ ±2% RH (Typical @ 25°C)

​​Temperature Measurement Range:​​ -40°C to +125°C (-40°F to +257°F)

​​Temperature Accuracy:​​ ±0.3°C (Typical @ 25°C)

​​Communication Interface:​​ I²C (Up to 1 MHz)

​​Power Consumption:​​

Measurement Mode:

Standby Mode:

​​Package Size:​​ 2.5mm × 2.5mm × 0.9mm (DFN Surface Mount)

​​Operating Temperature:​​ -40°C to +85°C (Suitable for Industrial Settings)

​​2. Pin Functions ( )​​

​​VCC:​​ Power Positive Input (2.4V-5.5V DC)

​​GND:​​ Power Supply and Logic Ground (Common Ground with Controller)

​​SCL:​​ I²C Clock Line (4.7kΩ Pull-up Resistor Required)

​​SDA:​​ I²C Data Line (4.7kΩ Pull-up Resistor Required)

​​ADDR:​​ I²C Address Selection:

Open or GND: Default Address 0x44

To VCC: Address 0x45 (Avoids Bus Conflicts)

​​ALERT:​​ Alarm Output (Active High, Holds Until Condition is Restored)

Frequently Asked Questions (FAQ)​​

​​Q1: I²C Communication Fails. How to Troubleshoot?​​

​​A:​​ Confirm the ADDR pin level matches the programmed address (0x44 or 0x45). Ensure SCL/SDA have 4.7kΩ pull-up resistors. Check for bus address conflicts with other I2C devices.

​​Q2: Humidity Reading Deviation >5% RH. How to Resolve?​​

​​A:​​ Avoid sensor exposure to condensing Settings (or enable the built-in heater for dehumidification in supported models). Add a 10µF capacitor between VCC and GND for power supply filtering.