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Home > Products > Discrete Semiconductor Products > Diodes > Variable Capacitance (Varicaps, Varactors)

Toshiba Semiconductor and Storage 1SV270TPH3F

Name: 1SV270TPH3F
Brand: Toshiba Semiconductor and Storage
SKU: 1SV270TPH3F
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 1SV270TPH3F

Manufacturer:: Toshiba Semiconductor and Storage

Category:: Variable Capacitance (Varicaps, Varactors)

Package:: SC-76, SOD-323

Datasheet:: 1SV270TPH3F.pdf

Description:: DIODE VARICAP VCO UHF USC

Quantity:: RFQ Add To RFQ list

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Inventory:5,830

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Product details

Overview

1SV270TPH3F from Toshiba is a silicon epitaxial planar varactor diode optimized for voltage-controlled oscillator (VCO) applications in UHF-band radio systems. It delivers a typical capacitance ratio C1V/C4V of 2.0, low series resistance of 0.28 Ω at 470 MHz, and nominal capacitance of 16 pF at 1 V reverse bias - enabling precise frequency tuning with minimal loss.

For engineers reviewing the 1SV270TPH3F datasheet, 1SV270TPH3F pinout, 1SV270TPH3F application, or 1SV270TPH3F equivalent, key selection criteria include reverse voltage rating (10 V), junction temperature limit (125°C), C1V/C4V ratio stability, RF series resistance at UHF, and compatibility with compact SOD-323 (SC-90) surface-mount layouts.

Technical Context

This varactor diode operates as a voltage-dependent capacitor in resonant tank circuits, where applied reverse bias modulates junction depletion width to tune oscillation frequency. Its epitaxial planar structure ensures reproducible C-V characteristics and low parasitic resistance critical for high-Q VCOs.

The device is characterized at 1 MHz for capacitance (C1V, C4V) and at 470 MHz for series resistance (rs), reflecting its intended use in UHF VCOs (300–1000 MHz). Absolute maximum ratings specify 10 V reverse voltage and 125°C junction temperature, with storage range from −55°C to +125°C.

Key Specifications

Parameter	Value and Actual Design Meaning
Capacitance at 1 V	16 pF (typ.) - sets baseline tank capacitance for UHF resonance center frequency
Capacitance at 4 V	8.0 pF (typ.) - defines minimum capacitance under tuning voltage, determining max frequency swing
Capacitance ratio C1V/C4V	2.0 (typ.) - quantifies usable tuning range; higher ratio enables wider frequency deviation
Series resistance rs	0.28 Ω (typ.) at 470 MHz - directly impacts VCO phase noise and Q-factor degradation
Reverse voltage VR	10 V - maximum DC bias before leakage or breakdown compromises tuning linearity or reliability
Junction temperature Tj	125°C - thermal limit for continuous operation; derating required above ambient 85°C

Pinout & Package

Package: SOD-323 (SC-90), surface-mount, 2-terminal plastic package (JEITA code: 1-1E1A), dimensions per Toshiba drawing - 1.7 × 1.3 × 0.9 mm, weight 0.004 g.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry / DC bias reference	Connected to ground or bias network; polarity must be observed to maintain reverse-bias operation
Cathode	Reverse-biased terminal / RF signal node	Connected to LC tank; voltage applied here controls depletion capacitance; RF path must minimize trace inductance

Key Features

Feature	Design Value
High C1V/C4V ratio	2.0 typ. - enables >30% relative frequency tuning range in fundamental-mode UHF VCOs
Low RF series resistance	0.28 Ω at 470 MHz - reduces resistive loss in resonant circuit, preserving oscillator Q and phase noise performance
UHF-optimized characterization	rs measured at 470 MHz - ensures parameter validity within target operating band, not extrapolated from LF data
Small-outline SOD-323 package	1.7 × 1.3 mm footprint - supports dense RF layout with minimal parasitic inductance and thermal mass

Applications

UHF FM Transmitter Tuning	Wireless Microphone VCO
Use Scenario: Frequency modulation in portable UHF FM transmitters (470–698 MHz) requiring stable, low-noise carrier generation. IC Role / Device Role / Timing Role: Varactor diode providing voltage-controlled capacitance in Colpitts VCO tank circuit. Use Value: 2.0 C1V/C4V ratio and 0.28 Ω rs support ±5 MHz deviation with <−110 dBc/Hz phase noise at 100 kHz offset.	Use Scenario: Compact battery-powered wireless microphones needing wideband tuning across UHF TV white space bands. IC Role / Device Role / Timing Role: Tuning element in integrated VCO module, biased via DAC-controlled voltage. Use Value: SOD-323 size allows placement adjacent to inductor without trace length penalty; 10 V VR rating accommodates 0–9 V tuning range.
ISM Band Remote Control	UHF RFID Reader Oscillator
Use Scenario: Low-cost remote control transmitters operating in 433 MHz or 868 MHz ISM bands with channel-hopping capability. IC Role / Device Role / Timing Role: Voltage-variable capacitor in PLL-based synthesizer front-end VCO. Use Value: 16 pF C1V provides optimal tank impedance match to common 3.3 V CMOS PLL charge pumps; low rs minimizes lock-time jitter.	Use Scenario: Handheld UHF RFID readers (860–960 MHz) requiring fast, accurate frequency agility across regulatory sub-bands. IC Role / Device Role / Timing Role: Primary tuning diode in discrete VCO used for local oscillator generation. Use Value: 125°C Tj rating supports operation in sealed enclosures; 3 nA IR at 10 V ensures stable bias point over temperature.

UHF FM Transmitter Tuning

Wireless Microphone VCO

Use Scenario: Frequency modulation in portable UHF FM transmitters (470–698 MHz) requiring stable, low-noise carrier generation.

IC Role / Device Role / Timing Role: Varactor diode providing voltage-controlled capacitance in Colpitts VCO tank circuit.

Use Value: 2.0 C1V/C4V ratio and 0.28 Ω rs support ±5 MHz deviation with <−110 dBc/Hz phase noise at 100 kHz offset.

Use Scenario: Compact battery-powered wireless microphones needing wideband tuning across UHF TV white space bands.

IC Role / Device Role / Timing Role: Tuning element in integrated VCO module, biased via DAC-controlled voltage.

Use Value: SOD-323 size allows placement adjacent to inductor without trace length penalty; 10 V VR rating accommodates 0–9 V tuning range.

ISM Band Remote Control

UHF RFID Reader Oscillator

Use Scenario: Low-cost remote control transmitters operating in 433 MHz or 868 MHz ISM bands with channel-hopping capability.

IC Role / Device Role / Timing Role: Voltage-variable capacitor in PLL-based synthesizer front-end VCO.

Use Value: 16 pF C1V provides optimal tank impedance match to common 3.3 V CMOS PLL charge pumps; low rs minimizes lock-time jitter.

Use Scenario: Handheld UHF RFID readers (860–960 MHz) requiring fast, accurate frequency agility across regulatory sub-bands.

IC Role / Device Role / Timing Role: Primary tuning diode in discrete VCO used for local oscillator generation.

Use Value: 125°C Tj rating supports operation in sealed enclosures; 3 nA IR at 10 V ensures stable bias point over temperature.

Equivalent & Alternatives

The following parts are listed as comparable options for similar varactor diode applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BBY52-02W	C1V = 20 pF (typ.), C1V/C4V = 1.9, rs = 0.45 Ω at 500 MHz	Higher C1V shifts tank resonance lower; higher rs increases phase noise in narrowband VCOs	Prefer when wider absolute capacitance range needed; verify tank redesign for 20 pF baseline
SVC123	C1V = 12 pF (typ.), C1V/C4V = 2.2, rs = 0.35 Ω at 470 MHz	Lower C1V requires larger inductor for same center frequency; higher ratio improves tuning linearity	Choose for improved linearity in wide-deviation systems; confirm layout tolerance for 12 pF sensitivity

Compared with BBY52-02W and SVC123, the 1SV270TPH3F offers the lowest series resistance (0.28 Ω) among the three, making it optimal for low-phase-noise UHF VCOs where Rs directly limits Q; its 16 pF C1V strikes a balance between tuning range and tank component sizing.

Availability

1SV270TPH3F is available at Aetrix Electronics and suitable for UHF FM transmitters, wireless microphone systems, and ISM-band remote controls requiring stable component supply and consistent C-V characteristics across production lots.

Supply support for 1SV270TPH3F 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

Toshiba Electronic Devices & Storage Corporation designs and manufactures discrete semiconductors, power devices, and logic ICs with emphasis on reliability, efficiency, and miniaturization for industrial and consumer applications.

The 1SV270TPH3F belongs to Toshiba's legacy varactor diode product line, engineered specifically for analog RF tuning in UHF communication equipment where predictable C-V slope and low RF loss are essential.

FAQ

What is the maximum reverse voltage rating for the 1SV270TPH3F?

The 1SV270TPH3F has an absolute maximum reverse voltage rating of 10 V at Ta = 25°C. Exceeding this voltage risks irreversible junction breakdown or accelerated degradation. Designers should apply appropriate derating - especially at elevated temperatures - per Toshiba's Reliability Handbook guidelines. The 1SV270TPH3F must remain reverse-biased during operation; forward conduction is not permitted.

How does the capacitance ratio C1V/C4V affect VCO design using the 1SV270TPH3F?

The 1SV270TPH3F exhibits a typical C1V/C4V ratio of 2.0, meaning its capacitance changes from ~16 pF at 1 V to ~8 pF at 4 V reverse bias. This 2:1 ratio determines the theoretical frequency tuning range (since f ∝ 1/√C) - enabling up to ~41% relative frequency shift in a simple LC tank. Designers use this ratio to size inductors and define control voltage range for linear tuning.

Is the 1SV270TPH3F suitable for operation above 800 MHz?

The 1SV270TPH3F is characterized up to 470 MHz for series resistance (rs = 0.28 Ω typ.), and its C-V data is specified at 1 MHz. While usable in 800–900 MHz applications (e.g., UHF RFID), actual rs increases with frequency due to skin effect and package parasitics. For reliable >700 MHz operation, designers must validate Q-factor and phase noise empirically; the 1SV270TPH3F remains viable but requires careful layout and measurement.

What is the thermal limit for continuous operation of the 1SV270TPH3F?

The 1SV270TPH3F has a maximum junction temperature (Tj) rating of 125°C and a storage temperature range of −55°C to +125°C. Continuous operation above 85°C ambient requires thermal derating of power dissipation - primarily from RF current heating and DC bias leakage. The 1SV270TPH3F's low 3 nA IR at 10 V helps minimize self-heating, but PCB copper area and airflow must be considered in enclosed UHF modules.

Does the 1SV270TPH3F have lead-free and RoHS-compliant packaging?

Yes, the 1SV270TPH3F uses lead-free terminations and complies with the EU RoHS Directive. Toshiba confirms RoHS compliance for this part in its official environmental documentation. The SOD-323 package (JEITA code 1-1E1A) contains no intentionally added lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE. Always verify latest compliance status via Toshiba's official materials declaration portal before high-volume deployment.

1SV270TPH3F Specifications

Product attributes: Attribute value

Manufacturer:: Toshiba Semiconductor and Storage

Series:: -

Package/Case:: SC-76, SOD-323

Packaging:: Tape & Reel (TR)

Product Status:: Active

Capacitance @ Vr, F:: 8.7pF @ 4V, 1MHz

Capacitance Ratio:: 2.0

Capacitance Ratio Condition:: C1/C4

Voltage - Peak Reverse (Max):: 10 V

Diode Type:: Single

Q @ Vr, F:: -

Operating Temperature:: 125°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: USC

1SV270TPH3F FAQ

1.How can I place an order for 1SV270TPH3F through Aetrix?

Please submit a Request for Quotation (RFQ) for 1SV270TPH3F 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 1SV270TPH3F reliable?

The price and inventory of 1SV270TPH3F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1SV270TPH3F is usually 5 days.

3.What payment methods are accepted for 1SV270TPH3F?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1SV270TPH3F transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1SV270TPH3F?

1SV270TPH3F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1SV270TPH3F 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 1SV270TPH3F?

For technical support, including 1SV270TPH3F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1SV270TPH3F requirements.

6.How does Aetrix verify that 1SV270TPH3F is sourced from the original manufacturer or authorized distributors?

All 1SV270TPH3F 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 1SV270TPH3F meets industry standards.

7.What is the process for return or replacement of 1SV270TPH3F?

All 1SV270TPH3F units undergo pre-shipment inspection (PSI). If there is an issue with 1SV270TPH3F, 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 1SV270TPH3F part is unused and in its original packaging.

Return procedure for 1SV270TPH3F:

1.Submit a request within 90 days.

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

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