7 January 2010


Non-reflective high-isolation SPDT switch for cellular and LTE/4G

Hittite Microwave Corp of Chelmsford, MA, USA has launched a GaAs pHEMT SPDT (single pole, double throw) MMIC switch suited to automotive telematics, private mobile radio (PMR), cellular/3G, WiMAX/4G and test equipment applications from DC to 6GHz.

The HMC849LP4CE is a low-loss, high-linearity GaAs pHEMT SPDT MMIC switch for use in transmit and receive applications that require wide bandwidth and high isolation. The versatile switch suits cellular/LTE/4G infrastructure applications offering up to 60dB isolation and +52dBm input IP3, with insertion loss as low as 0.8dB. Power handling through the 5–6GHz WiMAX band offers a P1dB compression point of +32dBm.

The HMC849LP4CE also has on-chip circuitry that accepts a single positive control voltage of 0/+3V or 0/+5V at very low DC currents. An enable input (EN) set to logic high will put the switch in an 'all off' state with both outputs terminated into 50 Ohms.

The SPDT switch is housed in a RoHS-compliant, 4mm x 4mm QFN SMT package, and complements Hittite's broad line of SPST and SPNT switch products with frequency coverage up to 86GHz.

Samples and evaluation PC boards for all SMT-packaged products are available.

See related item:

Hittite recovery continues, driven by new products

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