SMP1321-005LF

RF Diode Overview

The SMP1321-005LF is a low capacitance, plastic packaged PIN diode from the Skyworks SMP1321 series. It is designed for high-performance wireless switch applications operating from 10 MHz to over 10 GHz. The device features a typical capacitance of 0.18 pF at 30 V and a maximum of 0.25 pF. Series resistance is typically 1.05 Ω at 10 mA, with a maximum of 2.0 Ω. It has a reverse voltage rating of 100 V and power dissipation of 400 mW per junction. Operating temperature ranges from -65 °C to +150 °C. The component is housed in an SOT-23 package with a low inductance (LS = 1.5 nH) configuration.

RF Diode Feature Summary

• Low capacitance design optimized for high isolation series-connected switches
• Low series resistance suitable for battery-operated circuits
• Plastic surface mountable packages rated MSL1 at 260 °C

RF Diode Applications

• High-performance wireless switches
• Series-connected PIN diode switches
• Battery operated circuit switching

RF Diode Procurement Notes

Verify the specific ordering suffix against the manufacturer's datasheet to confirm package type and lead-free compliance. Confirm current availability status as product lifecycles may change. Ensure handling procedures follow industry-standard ESD precautions during storage and assembly.

RF Diode Selection Notes

Select this component when low capacitance and low series resistance are critical for high-frequency switching performance. Verify that the SOT-23 package dimensions and low inductance characteristics meet the PCB layout requirements. Check absolute maximum ratings against the intended operating conditions.

RF Diode Part Context

The SMP1321-005LF belongs to the SMP1321 series of low capacitance, plastic packaged PIN diodes manufactured by Skyworks Solutions. This series includes various configurations such as SC-79, SOD-882, and SOD-323 packages. The -005LF designation specifically identifies the SOT-23 package variant with a marking code of RM2.

RF Diode Replacement Considerations

Direct replacements within the same series include SMP1321-079LF (SC-79), SMP1321-040LF (SOD-882), and SMP1321-011LF (SOD-323). These alternatives share similar electrical characteristics but differ in package footprint and inductance values.