HSMS-281L-BLKG

RF Diode Overview

The HSMS-281L-BLKG is a surface mount RF Schottky barrier diode from the HSMS-281x series, housed in an SOT-363 package. It contains three unconnected diodes configured as a trio. Key electrical specifications at 25°C include a breakdown voltage of 5V, a maximum forward voltage of 400mV at 1mA forward current, and a typical capacitance of 15pF at 0V reverse bias. The device features low flicker noise and a dynamic resistance of 1.2Ω at 5mA. It supports lead-free construction and is supplied in tape and reel packaging.

RF Diode Feature Summary

• Designed for analog and digital applications with very low flicker (1/f) noise characteristics.
• Manufactured using techniques that ensure high matching precision for diodes within pairs and quads.
• Available in multiple surface mount package configurations including single, dual, and quad versions.

RF Diode Applications

• Low noise RF signal processing
• Analog switching circuits
• Digital logic interfacing

RF Diode Procurement Notes

Verify the specific ordering suffix to confirm package type and quantity. The BLKG suffix indicates the SOT-363 package with an unconnected trio configuration. Confirm lead-free status if required by checking for the 'G' character in the part number. Ensure compatibility with automated assembly processes by referencing the recommended PCB footprint dimensions provided in the datasheet.

RF Diode Selection Notes

Select this component when low flicker noise is critical compared to other Schottky families. The HSMS-281x series offers lower 1/f noise than the HSMS-282x family while maintaining moderate series resistance. Choose the SOT-363 package for compact designs requiring three independent diodes. Compare SPICE parameters against HSMS-280x and HSMS-282x families to ensure optimal performance for specific voltage and current requirements.

RF Diode Part Context

This component belongs to the Broadcom Limited HSMS-281x series of surface mount RF Schottky barrier diodes. The series provides various configurations including single, dual, and quad versions in SOT-23, SOT-143, SOT-323, and SOT-363 packages. The HSMS-281x family is specifically engineered for low flicker noise applications, distinguishing it from the higher breakdown HSMS-280x and lower resistance HSMS-282x families.

RF Diode Replacement Considerations

Direct substitutes within the same series include HSMS-281K-BLKG (High Isolation Unconnected Pair) or HSMS-281B-BLK (Single Diode) depending on circuit topology. For different package types, consider HSMS-281L-SMT equivalents. Verify pinout compatibility and electrical parameters such as breakdown voltage and capacitance before substitution.

RF Diode FAQ

What is the configuration of the HSMS-281L?

The HSMS-281L contains three unconnected diodes arranged in a trio configuration within an SOT-363 package.

How does the HSMS-281x series compare to the HSMS-282x series?

The HSMS-281x series offers lower flicker (1/f) noise compared to the HSMS-282x series, making it suitable for low-noise applications where the HSMS-282x might introduce excessive noise.

What is the typical junction capacitance of the HSMS-281L?

The typical junction capacitance is 15 pF at 0 V reverse bias and 1 MHz frequency.