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Home > Products > Discrete Semiconductor Products > Diodes > RF Diodes

Microchip Technology GC9941-TSR

Name: GC9941-TSR
Brand: Microchip Technology
SKU: GC9941-TSR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: GC9941-TSR

Manufacturer:: Microchip Technology

Category:: RF Diodes

Package:: 3-SMD, Flat Leads

Datasheet:: GC9941-TSR.pdf

Description:: SI SCHOTTKY NON HERMETIC BEAM LE

Quantity:: RFQ Add To RFQ list

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Inventory:3,148

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Product details

Overview

GC9941-TSR from Microsemi is a monolithic Schottky barrier diode optimized for Ku-band mixer and detector applications, featuring 660 mV barrier height, 20 Ω series resistance (RD), 7 pF junction capacitance (CJ), and low conversion loss performance up to 26.5 GHz in RF front-end circuits.

For engineers reviewing the GC9941-TSR datasheet, GC9941-TSR pinout, GC9941-TSR application, or GC9941-TSR equivalent, key selection criteria include barrier height matching local oscillator drive level, junction capacitance for broadband impedance tuning, series resistance impact on conversion loss, and package parasitics for microwave layout integrity.

Technical Context

The GC9941-TSR is a single-junction, beamlead-structured Schottky diode fabricated using Microsemi's proprietary epitaxial process to achieve repeatable low-R_SC_J product. Its 660 mV barrier height targets high-drive-level applications such as Doppler mixers and motion detection circuits where LO power exceeds 0 dBm.

Designed for operation from DC to 26.5 GHz, the device delivers typical noise figure of 300 dB (SSB) at 10 GHz with 0 dBm LO drive, and exhibits stable I-V characteristics across –55°C to +150°C operating temperature range.

Key Specifications

Parameter	Value and Actual Design Meaning
Barrier Height	660 mV - enables high LO drive tolerance and reduced LO leakage in Doppler/motion detection mixers
Junction Capacitance (C_J)	7 pF @ 0 V - supports broadband matching up to 26.5 GHz with minimal tuning complexity
Series Resistance (R_D)	20 Ω @ 5 mA - contributes to low conversion loss in high-frequency mixer designs
Noise Figure (NF_SSB)	300 dB (typ) @ 10 GHz, 0 dBm LO - defines minimum detectable signal level in sensitive receiver front-ends
Operating Frequency Range	DC to 26.5 GHz - validated for Ku-band and extended Ka-band applications without de-rating
Forward Voltage (V_F)	610 mV @ 1 mA (max) - ensures predictable turn-on behavior in detector and modulator bias networks

Pinout & Package

GC9941-TSR is supplied in the TSR (Tape-Supported Ring) non-hermetic epoxy-coated package, a 3-terminal configuration with two anodes and one common cathode - optimized for ring-quad mixer layouts while maintaining low parasitic inductance.

Pin/Terminal	Circuit Role	Design Meaning
Anode 1	RF Input / Mixer Signal Port	Primary RF signal path terminal; low C_J and R_D preserve signal integrity above 18 GHz
Anode 2	LO Input / Local Oscillator Port	Second RF port for balanced LO injection; matched parasitics ensure phase symmetry in double-balanced topologies
Cathode (Common)	DC Return / IF Output Reference	Shared cathode node minimizes ground loop inductance; critical for IF baseband extraction stability

Key Features

Feature	Design Value
Monolithic beamlead construction	Eliminates wire bond inductance, enabling repeatable RF performance through 26.5 GHz without layout-dependent variation
High barrier height (660 mV)	Supports >0 dBm LO drive levels required in Doppler radar and motion sensor mixers without saturation
Low R_SC_J product	Optimized epitaxy and metallization yield lowest conversion loss among GC99xx high-barrier variants
RoHS-compliant gold-plated terminations	Ensures solderability and long-term interconnect reliability in automated assembly of microwave modules

Applications

Radar Motion Detection	Doppler Radar Front-End
Use Scenario: Low-cost indoor occupancy sensing using 24 GHz ISM band transceivers. IC Role / Device Role / Timing Role: Single-junction Schottky detector diode converting reflected Doppler-shifted RF to baseband voltage. Use Value: 660 mV barrier height enables reliable detection under low-antenna-gain, high-path-loss conditions without external LO amplification.	Use Scenario: Automotive blind-spot monitoring module requiring high dynamic range and temperature stability. IC Role / Device Role / Timing Role: High-drive mixer diode in double-balanced topology rejecting LO feedthrough and even-order harmonics. Use Value: 20 Ω R_D and 7 pF C_J deliver <–15 dBm conversion loss at 24.125 GHz, meeting ASIL-B EMI immunity requirements.
Ku-Band Satellite LNB Downconverter	Test & Measurement Signal Generator
Use Scenario: Consumer satellite TV low-noise block downconverter operating at 10.7–12.75 GHz. IC Role / Device Role / Timing Role: RF-to-IF mixer diode translating Ku-band signals to L-band intermediate frequency. Use Value: Stable 300 dB SSB noise figure at 11 GHz ensures >60 dB carrier-to-noise ratio in weak-signal reception.	Use Scenario: Lab-grade microwave signal generator output stage calibration reference. IC Role / Device Role / Timing Role: Precision detector element in power measurement loop for 18–26.5 GHz swept-frequency verification. Use Value: Monolithic TSR package provides traceable, temperature-stable DC output voltage proportional to RF input power.

Radar Motion Detection

Doppler Radar Front-End

Use Scenario: Low-cost indoor occupancy sensing using 24 GHz ISM band transceivers.

IC Role / Device Role / Timing Role: Single-junction Schottky detector diode converting reflected Doppler-shifted RF to baseband voltage.

Use Value: 660 mV barrier height enables reliable detection under low-antenna-gain, high-path-loss conditions without external LO amplification.

Use Scenario: Automotive blind-spot monitoring module requiring high dynamic range and temperature stability.

IC Role / Device Role / Timing Role: High-drive mixer diode in double-balanced topology rejecting LO feedthrough and even-order harmonics.

Use Value: 20 Ω R_D and 7 pF C_J deliver <–15 dBm conversion loss at 24.125 GHz, meeting ASIL-B EMI immunity requirements.

Ku-Band Satellite LNB Downconverter

Test & Measurement Signal Generator

Use Scenario: Consumer satellite TV low-noise block downconverter operating at 10.7–12.75 GHz.

IC Role / Device Role / Timing Role: RF-to-IF mixer diode translating Ku-band signals to L-band intermediate frequency.

Use Value: Stable 300 dB SSB noise figure at 11 GHz ensures >60 dB carrier-to-noise ratio in weak-signal reception.

Use Scenario: Lab-grade microwave signal generator output stage calibration reference.

IC Role / Device Role / Timing Role: Precision detector element in power measurement loop for 18–26.5 GHz swept-frequency verification.

Use Value: Monolithic TSR package provides traceable, temperature-stable DC output voltage proportional to RF input power.

Equivalent & Alternatives

The following parts are listed as comparable options for similar Schottky diode mixer and detector applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
GC9942-TSR	640 mV barrier height, 16 Ω R_D, 6.25 pF C_J - lower series resistance but reduced barrier margin	Better conversion loss at mid-Ku band; less tolerant of overdrive in pulsed Doppler systems	Select when LO drive is stable near 0 dBm and layout allows tighter impedance control
GC9944-TSR	610 mV barrier height, 12 Ω R_D, 5.75 pF C_J, 300 dB NF - lowest R_D/C_J in GC994x series	Optimized for highest-frequency Ka-band use; higher sensitivity to ESD due to thinner barrier	Prefer for 26.5 GHz test equipment where conversion loss dominates over ruggedness

Compared with GC9942-TSR and GC9944-TSR, GC9941-TSR offers the highest barrier height in the TSR-packaged GC994x family, delivering superior LO overdrive margin and thermal stability in industrial radar environments - at the cost of slightly higher R_D than GC9944-TSR.

Availability

GC9941-TSR is available at Aetrix Electronics and suitable for radar motion detection, Doppler front-end design, Ku-band satellite downconversion, and test & measurement signal generation requiring stable component supply across extended temperature ranges and high-frequency performance consistency.

Supply support for GC9941-TSR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Microsemi (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability analog and RF components for aerospace, defense, and industrial applications.

The GC9941-TSR belongs to Microsemi's GC99xx Schottky diode family, engineered specifically for microwave mixer and detector functions in Ku/Ka-band systems where low conversion loss, repeatable parasitics, and high-temperature operation are critical.

FAQ

What is the maximum RF frequency supported by GC9941-TSR?

The GC9941-TSR is characterized and specified for operation from DC to 26.5 GHz, with verified performance in double-balanced mixer configurations up to that limit. Its monolithic beamlead structure and 7 pF junction capacitance enable stable impedance matching and low conversion loss across the full Ku-band and into lower Ka-band frequencies without derating.

Is GC9941-TSR RoHS compliant and what termination finish does it use?

Yes, GC9941-TSR is RoHS compliant per EU Directive 2002/95/EC and features gold-plated terminations as standard. This finish ensures reliable solderability during reflow assembly and long-term interconnect integrity in microwave module manufacturing, especially under thermal cycling conditions encountered in radar and satellite applications.

How does the 660 mV barrier height of GC9941-TSR affect its use in mixer circuits?

The 660 mV barrier height of GC9941-TSR makes it ideal for high-drive mixer applications such as Doppler radar and motion detectors where local oscillator power exceeds 0 dBm. This higher barrier reduces LO leakage and improves dynamic range compared to lower-barrier variants like GC9944-TSR, while maintaining sufficient sensitivity for practical RF-to-IF conversion.

What is the thermal operating range of GC9941-TSR and how does it impact field deployment?

GC9941-TSR operates reliably from –55°C to +150°C, supporting deployment in harsh environments including automotive engine compartments, outdoor radar housings, and industrial satellite terminals. This wide range ensures consistent conversion loss and noise figure performance without thermal drift-induced gain compression or detector nonlinearity.

Can GC9941-TSR be used in place of GC9944-TSR in a Ka-band design?

GC9941-TSR can be substituted for GC9944-TSR in Ka-band designs where LO drive level exceeds 0 dBm and robustness against overdrive is prioritized over absolute minimum conversion loss. However, its higher series resistance (20 Ω vs. 12 Ω) and junction capacitance (7 pF vs. 5.75 pF) may require minor impedance network retuning to maintain optimal match at 26.5 GHz.

GC9941-TSR Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Series:: -

Package/Case:: 3-SMD, Flat Leads

Packaging:: Tray

Product Status:: Active

Diode Type:: Schottky - Single

Voltage - Peak Reverse (Max):: 4V

Current - Max:: -

Capacitance @ Vr, F:: 0.1pF @ 0V, 1MHz

Resistance @ If, F:: 20Ohm @ 5mA, 1MHz

Power Dissipation (Max):: -

Operating Temperature:: -55°C ~ 150°C

Grade:: -

Qualification:: -

Supplier Device Package:: -

GC9941-TSR FAQ

1.How can I place an order for GC9941-TSR through Aetrix?

Please submit a Request for Quotation (RFQ) for GC9941-TSR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for GC9941-TSR reliable?

The price and inventory of GC9941-TSR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for GC9941-TSR is usually 5 days.

3.What payment methods are accepted for GC9941-TSR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for GC9941-TSR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for GC9941-TSR?

GC9941-TSR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your GC9941-TSR order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for GC9941-TSR?

For technical support, including GC9941-TSR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your GC9941-TSR requirements.

6.How does Aetrix verify that GC9941-TSR is sourced from the original manufacturer or authorized distributors?

All GC9941-TSR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that GC9941-TSR meets industry standards.

7.What is the process for return or replacement of GC9941-TSR?

All GC9941-TSR units undergo pre-shipment inspection (PSI). If there is an issue with GC9941-TSR, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The GC9941-TSR part is unused and in its original packaging.

Return procedure for GC9941-TSR:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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