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Microchip Technology UM7306SM
- Part No.:
- UM7306SM
- Manufacturer:
- Microchip Technology
- Category:
- RF Diodes
- Package:
- -
- Datasheet:
-
UM7306SM.pdf
- Description:
- RF DIODE PIN 600V 7.5W
- Quantity:
- Payment:
- Shipping:
Inventory:8,628
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Product details
Overview
UM7306SM from Microsemi is a surface-mount PIN diode optimized for RF switching and linear attenuator applications in HF–1 GHz systems. It features 600 V reverse voltage rating, 0.7 pF maximum capacitance at 100 V/1 MHz, 3.0 Ω maximum series resistance at 100 mA/100 MHz, and 4.0 μs minimum carrier lifetime - enabling low-distortion signal control in high-linearity RF paths.
For engineers reviewing the UM7306SM datasheet, UM7306SM pinout, UM7306SM application, or UM7306SM equivalent, key selection criteria include its low-capacitance (0.7 pF), high-voltage hold-off (600 V), thermally efficient SM package, and verified performance in broadband RF attenuators and transmit/receive switching circuits.
Technical Context
The UM7306SM implements a thick intrinsic-region PIN structure with non-cavity construction and thermally matched materials to minimize distortion in linear RF operation. Its carrier lifetime of ≥4.0 μs ensures transit-time-limited behavior below 5 MHz, supporting clean analog attenuation without harmonic generation.
As an RF switch, it operates with low DC bias while blocking RF voltages up to 600 V peak; as an attenuator element, its series resistance varies from 3.0 Ω (100 mA) to 3000 Ω (10 μA) at 100 MHz, enabling precise gain control across HF–1 GHz bands.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Voltage | 600 V - supports high-power RF switching in transmitter output stages without breakdown |
| Capacitance (CT) | 0.7 pF max @ 100 V, 1 MHz - minimizes signal leakage and insertion loss in broadband RF paths |
| Series Resistance (RS) | 3.0 Ω max @ 100 mA, 100 MHz - enables low-loss ON-state conduction in RF switches |
| Carrier Lifetime (τ) | 4.0 μs min @ 10 mA - ensures low intermodulation distortion in linear attenuator mode |
| I-Region Width | 250 μm min - defines intrinsic layer thickness critical for high-voltage handling and low distortion |
| Parallel Resistance (RP) | 150 kΩ min @ 100 V, 100 MHz - maintains high OFF-state isolation in RF switching |
Pinout & Package
UM7306SM uses a surface-mount (SM) package with two terminals: anode and cathode. The SM footprint matches standard pick-and-place placement requirements and provides solder fillets at outboard ends per Microsemi mechanical drawing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | DC bias injection node; polarity must be observed to avoid reverse conduction during RF switching |
| Cathode | Forward current exit / RF return path | Common RF ground reference; requires low-inductance PCB connection for broadband performance |
Key Features
| Feature | Design Value |
|---|---|
| Low capacitance | 0.7 pF max - preserves impedance matching and bandwidth in 50 Ω RF systems up to 1 GHz |
| High reverse voltage rating | 600 V - allows use in high-power HF transmitters and antenna tuning networks |
| Thermally matched construction | 18 °C/W thermal resistance (end cap temp) - enables stable RS over temperature in power RF attenuators |
| Non-cavity design | Eliminates parasitic resonances - ensures flat frequency response in broadband linear applications |
| Pick-and-place compatible | Standard SM footprint - supports automated assembly without rework or special tooling |
Applications
| HF Transmitter Output Switching | 1 GHz Broadband Attenuator |
|---|---|
Use Scenario: High-power HF band (3–30 MHz) transmit/receive switching in military comms radios requiring fast settling and minimal harmonic generation. IC Role / Device Role / Timing Role: PIN diode RF switch operating in series-shunt configuration with controlled forward bias current. Use Value: 600 V reverse rating prevents breakdown under high RF swing; 4.0 μs carrier lifetime suppresses IMD3 below –65 dBc. | Use Scenario: Precision programmable attenuator in test equipment covering 100 kHz–1 GHz, requiring <0.1 dB step linearity. IC Role / Device Role / Timing Role: Linear-mode PIN diode used as voltage-controlled resistor in π-type attenuator topology. Use Value: 0.7 pF capacitance and 3000 Ω–3.0 Ω RS range enable >60 dB dynamic range with <0.05 dB tracking error. |
| Antenna Tuning Network | RF Front-End Protection |
Use Scenario: Adaptive impedance matching network in HF/VHF software-defined radios, dynamically adjusting antenna feedpoint reactance. IC Role / Device Role / Timing Role: Bias-controlled variable reactance element replacing varactor diodes where higher power handling is required. Use Value: Non-cavity construction avoids spurious resonances; 250 μm I-region enables stable C-V curve up to 10 W average RF power. | Use Scenario: T/R switch protection stage in radar receiver front-end, clamping transient overvoltage before LNA input. IC Role / Device Role / Timing Role: Fast-switching shunt limiter activated by RF envelope detection circuitry. Use Value: 100 kW pulsed power rating (1 μs) and 150 kΩ parallel resistance ensure >40 dB isolation during clamp event without latch-up. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PIN diode RF switching and attenuation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| UM7306CR | Stud-mount package (CR style); 25 °C stud temp rating; 6 W max power dissipation | Better thermal anchoring for chassis-mounted high-power RF modules; not SMT-compatible | Select UM7306CR when board-level thermal management is insufficient and metal chassis heat sinking is available |
| UMX7306SM | RoHS-compliant version; identical electrical specs; same SM footprint | Required for EU/China export compliance; no performance trade-offs | Select UMX7306SM for new designs targeting RoHS-constrained markets without redesign |
Compared with UM7306CR, UM7306SM offers superior manufacturability in automated SMT lines but lower absolute power handling; versus UMX7306SM, it lacks RoHS certification yet remains suitable for legacy industrial or defense programs where leaded assembly is permitted.
Availability
UM7306SM is available at Aetrix Electronics and suitable for HF transmitter switching, 1 GHz broadband attenuators, and antenna tuning networks requiring stable component supply, long-term obsolescence planning, and traceable sourcing.
Supply support for UM7306SM 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 RF, microwave, and radiation-hardened components for defense, aerospace, and industrial applications.
The UM7300 series was designed specifically for high-linearity RF switching and analog attenuation in demanding HF–1 GHz systems where low distortion, high voltage tolerance, and thermal stability are critical.
FAQ
What is the maximum RF voltage that UM7306SM can block in switching applications?
The UM7306SM is rated for 600 V reverse voltage at 10 μA leakage, allowing it to block RF peak voltages up to ±600 V in properly biased switching configurations. This rating is validated under DC reverse bias conditions and applies to continuous-wave and pulsed RF signals within its specified frequency range (HF to 1 GHz). Actual blocking capability depends on thermal management and bias network design.
Does UM7306SM require a heatsink in typical surface-mount applications?
UM7306SM does not require an external heatsink in most surface-mount applications due to its 18 °C/W thermal resistance referenced to end-cap temperature and 5.5 W maximum power dissipation at 25 °C. However, sustained operation above 1 W average RF power or ambient temperatures exceeding 70 °C warrants evaluation of PCB copper area and thermal vias per Microsemi's SM footprint guidelines.
How does UM7306SM differ from UM4306SM in RF attenuator use?
UM7306SM offers lower capacitance (0.7 pF vs. 2.2 pF) and higher series resistance (3.0 Ω vs. 1.5 Ω at 100 mA), making it better suited for high-isolation, broadband attenuators where capacitance-induced signal leakage must be minimized. UM4306SM delivers lower ON-state loss but sacrifices high-frequency isolation and linearity due to higher CT.
Is UM7306SM compatible with lead-free reflow profiles?
Yes, UM7306SM is qualified for standard lead-free reflow processes (J-STD-020, peak 260 °C). Its SM package and internal construction withstand thermal cycling without delamination or parameter shift. Microsemi documentation confirms compatibility with IPC-A-610 Class 2 and Class 3 assembly standards.
Can UM7306SM be used in DC-coupled linear variable-resistor applications?
No - UM7306SM is not characterized or recommended for DC-coupled variable-resistor use. Its series resistance is highly nonlinear with DC current and temperature, and its 4.0 μs carrier lifetime introduces significant phase lag below 100 kHz. It is engineered exclusively for RF signal-path applications where AC coupling and RF biasing are employed.
UM7306SM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Diode Type:
- PIN - Single
- Voltage - Peak Reverse (Max):
- 600V
- Current - Max:
- -
- Capacitance @ Vr, F:
- -
- Resistance @ If, F:
- -
- Power Dissipation (Max):
- 7.5 W
- Operating Temperature:
- -55°C ~ 175°C (TA)
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- -
UM7306SM FAQ
1.How can I place an order for UM7306SM through Aetrix?
Please submit a Request for Quotation (RFQ) for UM7306SM 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 UM7306SM reliable?
The price and inventory of UM7306SM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UM7306SM is usually 5 days.
3.What payment methods are accepted for UM7306SM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UM7306SM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UM7306SM?
UM7306SM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UM7306SM 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 UM7306SM?
For technical support, including UM7306SM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UM7306SM requirements.
6.How does Aetrix verify that UM7306SM is sourced from the original manufacturer or authorized distributors?
All UM7306SM 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 UM7306SM meets industry standards.
7.What is the process for return or replacement of UM7306SM?
All UM7306SM units undergo pre-shipment inspection (PSI). If there is an issue with UM7306SM, 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 UM7306SM part is unused and in its original packaging.
Return procedure for UM7306SM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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