The FM8638 is a CMOS silicon-on-insulator (SOI), single-pole, triple-throw (SP3T) transmitting and receiving switch. The high linearity performance and low insertion loss makes the device an ideal choice for GSM/WCDMA/LTE handset and data card applications.
The FM8638 SP3T switch is provided in a compact QFN 9-pin 1.15mm x 1.15mm x 0.45mm package. A functional block diagram is shown in Figure 1. The pin configuration and package are shown in Figure 2. Signal pin assignments and functional pin descriptions are provided in Table 1.

Broadband frequency range: 0.1 to 3.0 GHz

Low insertion: 0.50 dB @ 2.7 GHz

High isolation: 25 dB up to 2.7 GHz

P0.1dB of 36dBm

No external DC blocking capacitors required

Positive low voltage control: VC = 1.6 to 3.00 V, VDD = 2.5 to 3.0 V

Small, QFN (9-pin, 1.1mm x 1.1mm x 0.5mm) package

GSM/WCDMA/LTE receive and transmit

802.11b/g/n WLANs

FM8638功能框图及引脚俯视图：



FM8638应用示意图及引脚说明：