HSMP-3894-TR2G

RF Diode Overview

The HSMP-3894-TR2G is a surface mount RF PIN switch diode from the HSMP-389x series, manufactured by Broadcom Limited. It features a common cathode configuration housed in an SOT-363 package. Key electrical specifications include a breakdown voltage of 100 V, a maximum series resistance of 2.5 ohms at 5 mA forward current, and a total capacitance of 0.30 pF measured at 1 MHz with 5 V reverse bias. The device supports a peak inverse voltage of 100 V and operates within a temperature range of -65°C to +150°C.

RF Diode Feature Summary

• Common cathode configuration for simplified biasing in switching circuits
• Low capacitance design optimized for high-frequency RF applications
• Low series resistance at low forward bias currents
• Lead-free construction compliant with environmental standards

RF Diode Applications

• RF switching circuits requiring low insertion loss
• High isolation SPDT switches using dual bias configurations
• Transmit/Receive (T/R) switches in communication systems
• Attenuator circuits in microstrip or coplanar waveguide layouts

RF Diode Procurement Notes

Verify the specific ordering suffix TR2G corresponds to the tape and reel quantity of 10,000 devices per 13-inch reel as defined in the datasheet. Confirm that the component is lead-free and matches the SOT-363 outline dimensions. Ensure compatibility with standard surface mount assembly profiles up to 260°C peak reflow temperature.

RF Diode Selection Notes

Select this component when a common cathode topology is required for RF switching applications. The 100 V breakdown voltage provides robust protection against high reverse voltages. The 0.30 pF capacitance ensures minimal signal attenuation at frequencies up to 3 GHz. Verify that the SOT-363 footprint aligns with the PCB layout requirements for the specific circuit density.

RF Diode Part Context

This part belongs to the HSMP-389x series of surface mount PIN diodes designed for switching applications. The series offers various configurations including single, series, and unconnected pairs. The HSMP-3894 specifically denotes the common cathode variant within this family, sharing similar electrical characteristics with other members like the HSMP-3890 and HSMP-3892 but differing in internal pin connectivity.

RF Diode Replacement Considerations

Direct substitutes within the same series include HSMP-3890 (Single), HSMP-3892 (Series), and HSMP-3893 (Common Anode). For common cathode needs, HSMP-489F is a low-inductance alternative in the HSMP-489x series. Ensure the replacement matches the SOT-363 package and electrical ratings if pinout differences exist.

RF Diode FAQ

What is the internal configuration of the HSMP-3894?

The HSMP-3894 features a common cathode configuration, where the cathodes of the internal diodes are connected together.

What is the maximum operating junction temperature?

The maximum junction temperature is 150°C.

How is the total capacitance specified?

Total capacitance is typically 0.30 pF, measured at 1 MHz with a reverse voltage of 5 V.