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Notes:

1. Set logic gate and switch Vdd = +3V to +10V and use HCT series logic to provide a TTL driver interface.

2. Control inputs A/B can be driven directly with CMOS logic (HC) with Vdd of +3 to +10 Volts applied to the CMOS

logic gates and to pin 4 of the RF switch.

3. DC Blocking capacitors are required for each RF port as shown. Capacitor value determines lowest frequency

of operation.

4. Highest RF signal power capability is achieved with V set to +10V. The switch will operate properly (but at lower

RF power capability) at bias voltages down to +3V.

Typical Application Circuit

Pin Descriptions

Pin Number

Function

Description

Interface Schematic

1

A

See truth table and control voltage table.

2

B

See truth table and control voltage table.

3, 5, 8

RFC, RF1, RF2

This pin is DC coupled and matched to 50 Ohms.

Blocking capacitors are required.

4Vdd

Supply Voltage

6, 7

GND

Package bottom must also

be connected to PCB RF ground.

HMC484MS8G / 484MS8GE

v04.0608

GaAs MMIC 10 WATT T/R SWITCH

DC - 3 GHz