This part is a kind of semiconductor called DHT22.

Function of this product has Digital-output relative humidity & temperature sensor/module.

Manufacturers : Aosong

Image and pinout :

Some of the text within the PDF file :

Aosong Electronics Co.,Ltd --------------------------------------------------------------------------------------------------------------------Your specialist in innovating humidity & temperature sensors Digital-output relative humidity & temperature sensor/module DHT22 (DHT22 also named as AM2302) Capacitive-type humidity and temperature module/sensor 1 Thomas Liu (Business Manager) Email: thomasliu198518@yahoo.com.cn Free Datasheet http://www.Datasheet4U.com Aosong Electronics Co.,Ltd --------------------------------------------------------------------------------------------------------------------Your specialist in innovating humidity & temperature sensors 1. Feature & Application: * Full range temperature compensated * Relative humidity and temperature measurement * Calibrated [ ... ]

ICL71C03 PDF Datasheet Download