SMP1345-079LF

RF Diode Overview

The SMP1345-079LF is a single silicon PIN diode from the Skyworks SMP1345 series, packaged in SC-79. It operates from 10 MHz to 6 GHz with a maximum reverse voltage of 50 V and power dissipation of 250 mW. Key electrical parameters include a typical capacitance of 0.15 pF (max 0.20 pF at 1V/1MHz), forward voltage of 890 mV at 10 mA, and carrier lifetime of 100 ns. Series resistance ranges from 1.5 Ω to 3.5 Ω at 100 MHz depending on current. The device supports an operating temperature range of -65 °C to +150 °C.

RF Diode Feature Summary

• Very low insertion loss of 0.4 dB for efficient RF signal transmission
• Extremely low capacitance of 0.15 pF ensuring high isolation performance
• Fast switching speed enabled by a short carrier lifetime of 100 ns

RF Diode Applications

• High isolation Low-Noise Block (LNB) systems
• Wireless Local Area Network (WLAN) components
• RF wireless switches

RF Diode Procurement Notes

Verify component authenticity against official Skyworks documentation before integration. Confirm that the SC-79 package marking matches the specified cathode indicator. Ensure handling procedures strictly follow ESD precautions due to the sensitivity of the semiconductor junction. Validate that the design environment remains within the specified -65 °C to +150 °C operating temperature limits.

RF Diode Selection Notes

Select this component when applications require fast switching speeds combined with minimal signal attenuation up to 6 GHz. The SC-79 package provides a compact footprint suitable for dense surface mount layouts. Consider the 100 ns carrier lifetime for high-speed modulation requirements and verify that the 50 V reverse voltage rating aligns with the circuit's peak reverse bias conditions.

RF Diode Part Context

This part belongs to the SMP1345 series of very low capacitance plastic packaged silicon PIN diodes. The series includes variants such as SMP1345-004LF and SMP1345-040LF, which differ primarily in parasitic inductance values and physical package types like SOT-23 or SOD-882. All variants share similar core electrical characteristics optimized for high-frequency RF switching.

RF Diode Replacement Considerations

SMP1345-004LF and SMP1345-040LF are direct family members offering different inductance profiles. Alternative packages include SOT-23 and SOD-882 configurations within the same series. Verify pinout compatibility and thermal management requirements when substituting across different package styles.