HMC574MS8_09 Datasheet, PDF (6/8 Pages) Hittite Microwave Corporation – GaAs MMIC 5 WATT T/R SWITCH DC - 3 GHz

v02.0308
HMC574MS8 / 574MS8E
GaAs MMIC 5 WATT T/R SWITCH
DC - 3 GHz
Pin Descriptions
Pin Number
Function
1
A
2
B
3, 5, 8
RFC, RF1, RF2
4
Vdd
6, 7
GND
Description
See truth table and control voltage table.
See truth table and control voltage table.
This pin is DC coupled and matched to 50 Ohm.
Blocking capacitors are required.
Supply Voltage.
This pin must be connected to RF/DC ground.
Interface Schematic
10
Typical Application Circuit
Notes:
1. Set logic gate and switch 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 +3 to +8 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 Vdd set to +8V. The switch will operate properly (but at lower RF power
capability) at bias voltages down to +3V.
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: [phone] Fax: [phone]
Order On-line at www.hittite.com
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