SMP1345-518

RF Diode Overview

The SMP1345-518 is a plastic packaged, surface mountable silicon PIN diode designed for high volume Low-Noise Block (LNB), Wireless Local Area Network (WLAN), and switch applications from 10 MHz to 6 GHz. It features a short carrier lifetime of 100 ns typical and an I-region width of 10 μm nominal. The device exhibits very low capacitance of 0.15 pF typical at 1 V reverse bias and low resistance of 1.5 Ω at 10 mA forward current. It operates within a temperature range of -65 °C to +150 °C with a maximum reverse voltage of 50 V and power dissipation of 250 mW.

RF Diode Feature Summary

• Designed specifically for WLAN 802.11 a/b/g diversity switch applications
• Fast speed RF switching enabled by short carrier lifetime and thin I-region width
• Very low insertion loss of 0.4 dB

RF Diode Applications

• High isolation LNBs
• Wireless Local Area Networks (WLAN)
• Diversity switch applications

RF Diode Procurement Notes

Verify the specific package marking '0' and lead-free status when sourcing. Confirm Moisture Sensitivity Level 1 (MSL1) compliance for soldering processes. Ensure ESD precautions are followed as the device is Class 1B. Check for discontinuation notices or alternative packages if production quantities are required.

RF Diode Selection Notes

Select this component for designs requiring fast RF switching in the 10 MHz to 6 GHz range. Consider the 0.15 pF capacitance for low insertion loss requirements. Verify that the 50 V reverse voltage rating meets the circuit's peak reverse voltage needs. Evaluate the 250 mW power dissipation limit against thermal constraints.

RF Diode Part Context

The SMP1345-518 belongs to the SMP1345 series of very low capacitance silicon PIN diodes manufactured by Skyworks Solutions Inc. This series includes various configurations such as common anode, common cathode, single ring, and single devices in packages like SOT-23, SC-79, SC-70, and SOD-882. The -518 suffix denotes the specific single device variant optimized for WLAN applications.

RF Diode Replacement Considerations

SMP1345-003LF, SMP1345-004LF, SMP1345-005LF, SMP1345-079LF