Plastic-packaged PIN diode circuit elements

November 23, 2016 // By Graham Prophet
Microsemi’s latest discrete product introductions continue a line of PIN diodes for RF power, small signal switching and receiver power limiting functions.

These devices are presented as highly cost competitive, to provide higher RF functionality, enabling defence, aerospace and medical customers to drive down bill of materials (BOM) costs with low risk and little sacrifice to performance.


“Our test and measurement, communication radio, radar and MRI customers all require an increased level of functional integration coupled with form factor reduction, which is consequently driving the need for PIN diode switches with higher density, functionality and performance,” said Kevin Harrington, director of strategic marketing for Microsemi's RF/Microwave Discrete Products business unit. “Our new PIN diode switches are both integrated and compact in surface mount plastic packaged formats which further enables superior RF performance.”


The product families include:

  • MPS4101-6LP, a single pole single throw (SPST) PIN switch with a 3 mm QFN-packaged series/shunt element offering wide-band, low-loss and high-isolation performance;

  • MMP4400, a series of five high-voltage, high-power PIN diode devices in plastic surface mount technology (SMT) packages with high stability and reliability, as well as low thermal resistance, high shunt isolation and low distortion;

  • GC4701-6LP, control devices with a SMT PIN limiter element, providing a specially processed PIN diode packaged in a low-cost plastic outline suitable for standard or co-planar microstrip circuits that comes in a 1.6 mm QFN package and offer low insertion loss, low threshold power and high isolation; and

  • MML4400, a series of fast surface mount MRI protection diodes offering protection from high-RF energy fields and enabling passive switching of surface-coil detuning and blocking circuits. The devices offer an anti-parallel option (unconnected pairs) in addition to low capacitance and conductance.


Example applications for each of these categories include;

MPS4101-6LP SPST PIN switch: receiver/transmitter and filter switching, receiver protection, attenuators in electronic warfare (EW) systems, channel switching in high linearity microwave radios, filter switching and receiver protection in military and land mobile radios

MMP4400 series: receiver/transmitter and filter switching, receiver protection, attenuators in EW systems,