SW-438 Datasheet | Tyco Electronics

.. Ga As SPDT Switch DC- 3.0 GHz Functional Schematic GHz 1 C=100p F C=8p F C=100p F C=100p F C≥39p F V 1.00 Features - - - - 1. Low Insertion Loss, 0.7 d B @ 2.4 High Isolation, 25 d B @ 2.4 GHz1 Low Power Consumption, < 10 µA @ +3 V Low Cost Plastic SOT-363 Package For best results at 2.4 GHz, use 8 p F 0402 profile SMT capacitors on RF ports and 100 p F bypassing on pins 4 and 6. C=100p F V1 V2 V1 V2 Description The SW-438 is a Ga As MMIC SPDT switch in a low cost SOT-363 surface mount plastic package. Typical applications include transmit/receive switching for Bluetooth and WLAN equipment. The SW-438 can also be used in applications up to 500 m W in systems such as cellular, PCS, DCS1800, GSM, CDMA and other analog and digital wireless munications systems. M/A- fabricates the SW-438 using a 0.5 micron gate length Ga As p-HEMT process. The process Features full passivation for increased performance and reliability. RF1 GND RF2 RF1 GND RF2 PIN 1 2.4 GHz Application C=8p F C=8p F PIN 1 Broad Band Applications C≥39p F C≥ 39p F Pin Configuration Pin No. 1 Function RF1 GND RF2 V2 RFC V1 Description RF Input/Output RF Ground RF Input/Output Control 2 Input RF mon Port Control 1 Input External ponent Requirements Please note the values of the external capacitors. The capacitors at each of the RF ports are used as for achieving optimum insertion loss. They also provide DC blocking for positive control. The 8 p F (0402) capacitor is remended for 2 - 3 GHz operation. If this value is changed or the capacitor placed too far from the switch, the performance will be affected. We also remend 100 p F bypass capacitors on pins 4 and 6. For broadband applications with positive control voltages, use DC blocking capacitors with value of 39 p F or more. 2 3 4 5...