The RTC5639E with QFN-16-EP(3x3) RF Chips ROHS is a highly integrated, low profile, low power RF transceiver IC manufactured specifically for use in high frequency, short range, ISM band operations. It operates in the 2.4-2.5 GHz frequency band and is designed for applications such as 900M or 1Gbps wireless personal area networks (WPANs). Its key features include low power consumption and programmable packet formats for transferring data between two wireless devices. Additionally, it offers high sensitivity and range, and supports multiple instruction sets such as IEEE 802.15.4-2006 and ZigBee. Furthermore, its 16-pin QFN-EP (3x3) package allows for easy SMT integration into any application. The RTC5639E is certified by the RoHS directive and meets the necessary requirements for safe and efficient use in both consumer and industrial applications.