HMC545 Datasheet, PDF (5/6 Pages) Hittite Microwave Corporation – GaAs MMIC SPDT SWITCH, DC - 3 GHz

v00.0905
Typical Application Circuit
8
HMC545 / 545E
GaAs MMIC SPDT
SWITCH, DC - 3 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 +8V 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.
4. Highest RF signal power capability is achieved with Vdd = +8V and A/B set to 0/+8V.
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
8 - 280
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