HMC484MS8G / 484MS8GE
v04.0608
GaAs MMIC 10 WATT T/R SWITCH
DC - 3 GHz
Pin Descriptions
Pin Number
1
Function
A
Description
See truth table and control voltage table.
Interface Schematic
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.
4
Vdd
Supply Voltage
6, 7
GND
Package bottom must also
be connected to PCB RF ground.
11
SWITCHES - SPDT T/R - SMT
Typical Application Circuit
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.
11 - 138
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
HITTITE [ HITTITE MICROWAVE CORPORATION ]
