HMC544A Datasheet, PDF (7/8 Pages) Hittite Microwave Corporation – GaAs MMIC T/R SWITCH, DC - 4 GHz

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Typical Application Circuit
HMC544A / 544AE
GaAs MMIC T/R SWITCH,
DC - 4 GHz
Notes:
1. Set logic gate Vdd = +3V to +5V 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 +3V to +5V applied to the CMOS logic gates.
3. DC Blocking capacitors are required for each RF port as shown. Capacitor value determines lowest frequency of operation.
Pin Descriptions
Pin Number
Function
1, 3, 5
RF2, RF1, RFC
Description
These pins are DC coupled and matched to 50 Ohms.
Blocking capacitors are required.
2
GND
This pin must be connected to RF/DC ground.
4
B
See truth and control voltage tables.
6
A
See truth and control voltage tables.
Interface Schematic
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