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

Infineon Technologies BB565H7912XTSA1

Name: BB565H7912XTSA1
Brand: Infineon Technologies
SKU: BB565H7912XTSA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BB565H7912XTSA1

Manufacturer:: Infineon Technologies

Category:: Variable Capacitance (Varicaps, Varactors)

Package:: SC-80

Datasheet:: BB565H7912XTSA1.pdf

Description:: DIODE VAR CAP 30V 20MA SCD80

Quantity:: RFQ Add To RFQ list

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Inventory:2,357

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Product details

Overview

BB565H7912XTSA1 from Infineon Technologies is a silicon hyperabrupt junction varactor diode in SC79 (SOD-523) package, designed for UHF-TV tuner tuning circuits. It delivers 18.5–21.5 pF capacitance at 1 V, 1.8–2.2 pF at 28 V, 10:1 typical capacitance ratio (CT₁/CT₂₈), and 0.6 Ω series resistance at 470 MHz - enabling precise, low-loss frequency synthesis in compact consumer tuners.

For engineers reviewing the BB565H7912XTSA1 datasheet, BB565H7912XTSA1 pinout, BB565H7912XTSA1 application, or BB565H7912XTSA1 equivalent, key selection criteria include reverse voltage rating (30 V), temperature coefficient of capacitance (−5×10⁻⁴ to −1×10⁻³ /°C), matching tolerance (±0.7% across 4-diode sequence), RoHS-compliant Pb-free construction, and AEC-Q101 qualification for automotive tuner modules.

Technical Context

This varactor operates as a voltage-controlled capacitor where reverse bias modulates depletion width and junction capacitance. Its hyperabrupt doping profile ensures near-linear C–V response in the 1–28 V range, critical for stable oscillator pulling in UHF front-ends.

Capacitance variation over temperature is characterized at 1 V, 2 V, and 25 V bias points, with normalized C(Tₐ)/C(25°C) ranging from 0.96 to 1.08 between −30°C and +110°C. Reverse leakage remains ≤200 nA at 30 V and 85°C, supporting reliable operation in thermally stressed tuner assemblies.

Key Specifications

Parameter	Value and Actual Design Meaning
Capacitance @ 1 V	18.5–21.5 pF - sets low-end tuning range in VCOs and RF filters
Capacitance @ 28 V	1.8–2.2 pF - defines high-frequency cutoff and tuning span
Capacitance Ratio CT₁/CT₂₈	9–11 - enables ≥100 MHz tuning bandwidth in 470–862 MHz TV bands
Series Resistance r_S	0.6 Ω typ. @ 470 MHz - minimizes Q degradation and phase noise in resonant tanks
Reverse Voltage Rating V_R	30 V DC - supports standard tuner bias rails with 15% margin above 28 V max tuning voltage
Operating Temp Range	−55°C to +150°C - qualified for under-hood automotive tuner modules per AEC-Q101
Capacitance Matching	±0.7% max deviation across 4-diode sequence - ensures consistent channel alignment in multi-tuner systems

Pinout & Package

SC79 (SOD-523) surface-mount package: 1.2 mm × 0.8 mm × 0.55 mm body, cathode-marked top-side laser marking, single-diode configuration, 2 mm pitch tape-and-reel packaging (8,000 pcs/reel).

Pin/Terminal	Circuit Role	Design Meaning
Anode	DC bias input / RF AC ground reference	Connected to fixed potential (e.g., ground or bias rail); forms low-impedance return path for RF signals
Cathode	Controlled reverse-bias terminal	Applied tuning voltage modulates depletion capacitance; must be isolated from RF signal paths via blocking capacitor

Key Features

Feature	Design Value
Hyperabrupt junction profile	Enables linearized C–V slope over 1–28 V, reducing distortion in wideband VCOs
"In-line" matching assembly	Guarantees ±0.7% capacitance uniformity across 4-device sequences for multi-channel tuner consistency
AEC-Q101 qualification	Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD (HBM >2 kV)
Pb-free RoHS-compliant construction	Meets EU Directive 2011/65/EU; compatible with lead-free reflow profiles (peak 260°C)
Low series inductance (0.6 nH)	Maintains self-resonant frequency >3 GHz, preserving tuning linearity up to UHF band edge

Applications

Digital Terrestrial TV Tuner

Automotive In-Vehicle Infotainment Tuner

Use Scenario: Front-end RF tuning block in DVB-T/T2 set-top boxes and integrated TVs operating 470–862 MHz.

IC Role / Device Role / Timing Role: Voltage-controlled capacitor in LC tank of broadband VCO, adjusted by PLL DAC output.

Use Value: 10:1 capacitance ratio enables full-band coverage without band-switching; ±0.7% matching ensures identical channel response across dual-tuner architectures.

Use Scenario: AM/FM and digital radio tuner module in automotive head units exposed to −40°C to +105°C ambient.

IC Role / Device Role / Timing Role: Tuning element in high-Q ceramic resonator-based oscillator for local oscillator generation.

Use Value: AEC-Q101 qualification and −55°C to +150°C operation ensure startup reliability at extreme cold cranking; low r_S preserves oscillator phase noise below −110 dBc/Hz @ 10 kHz offset.

UHF RFID Reader Transceiver

Portable Wireless Microphone Receiver

Use Scenario: Frequency-agile receiver front-end in 865–868 MHz ETSI-compliant RFID readers.

IC Role / Device Role / Timing Role: Fine-tuning capacitor in switched-filter bank for adaptive channel selection.

Use Value: Low series inductance (0.6 nH) and 0.6 Ω r_S maintain filter insertion loss <1.2 dB across 20 MHz bandwidth; SC79 footprint saves board space in handheld form factors.

Use Scenario: Compact diversity receiver in 2.4 GHz ISM-band wireless mics with auto-frequency hopping.

IC Role / Device Role / Timing Role: Calibration capacitor in digitally tuned preselector filter before LNA.

Use Value: Tight capacitance matching (±0.7%) allows factory calibration of 16-channel hopping table with <50 kHz center-frequency error; RoHS compliance meets global consumer device regulations.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BB565H7912XTMA1	Same die, SCD80 (SOD-323) package; 1.8 nH series inductance vs. 0.6 nH in SC79	Higher parasitic inductance limits usable frequency to ≤1 GHz; less suitable for UHF TV above 700 MHz	Select when legacy SOD-323 footprint compatibility is required and bandwidth ≤800 MHz suffices
BB545H7912XTSA1	Lower capacitance range (14.8–16.4 pF @ 1 V); 7-diode matching sequence vs. 4-diode for BB565	Optimized for VHF/UHF hybrid tuners; tighter matching (±0.5%) but narrower tuning span	Prefer for cost-sensitive VHF-first designs where 100 MHz tuning bandwidth is sufficient

Compared with BB565H7912XTMA1, this SC79 variant offers 3× lower series inductance for superior UHF linearity; versus BB545H7912XTSA1, it trades ±0.5% matching for +25% capacitance range - favoring wideband TV over VHF precision.

Availability

BB565H7912XTSA1 is available at Aetrix Electronics and suitable for digital terrestrial TV tuners, automotive infotainment receivers, and UHF RFID reader transceivers requiring stable component supply, AEC-Q101 compliance, and tight capacitance matching.

Supply support for BB565H7912XTSA1 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

Infineon Technologies is a German semiconductor manufacturer specializing in power management, RF, and automotive ICs, with leadership in silicon RF components since the 1990s.

The BB5xx varactor family targets high-volume consumer and automotive tuner applications, emphasizing matching accuracy, UHF performance, and qualification to automotive reliability standards.

FAQ

What is the maximum recommended reverse voltage for continuous operation?

The absolute maximum DC reverse voltage is 30 V at 25°C, with peak reverse voltage rated at 35 V. Operation above 30 V risks irreversible junction breakdown. Derating to 25 V is advised for designs operating above 85°C ambient or subject to transient spikes.

How does capacitance change with temperature at 2 V bias?

At 2 V reverse bias, normalized capacitance C(Tₐ)/C(25°C) varies from 0.98 at −30°C to 1.04 at +70°C and 1.08 at +110°C. This corresponds to a positive temperature coefficient of approximately +700 ppm/°C in that bias range, requiring compensation in temperature-stable oscillators.

Is BB565H7912XTSA1 suitable for 5G NR sub-6 GHz front-ends?

No - its self-resonant frequency is limited by 0.6 nH series inductance and package parasitics to ~3 GHz. While usable in 3.5 GHz TDD bands with careful layout, it lacks the Q-factor and harmonic suppression needed for 5G NR power amplifier tuning; purpose-built GaAs varactors are recommended above 2.5 GHz.

Can this diode be used in series or parallel configurations?

Parallel connection is supported and commonly used to increase total capacitance while maintaining matching - e.g., two BB565H7912XTSA1 devices yield ~35–42 pF @ 1 V with matched drift. Series connection is not recommended due to unequal voltage division and risk of exceeding individual VR rating under AC modulation.

BB565H7912XTSA1 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

Package/Case:: SC-80

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Capacitance @ Vr, F:: 2.2pF @ 28V, 1MHz

Capacitance Ratio:: 11.0

Capacitance Ratio Condition:: C1/C28

Voltage - Peak Reverse (Max):: 30 V

Diode Type:: Single

Q @ Vr, F:: -

Operating Temperature:: -55°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SCD-80

BB565H7912XTSA1 FAQ

1.How can I place an order for BB565H7912XTSA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for BB565H7912XTSA1 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 BB565H7912XTSA1 reliable?

The price and inventory of BB565H7912XTSA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BB565H7912XTSA1 is usually 5 days.

3.What payment methods are accepted for BB565H7912XTSA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BB565H7912XTSA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BB565H7912XTSA1?

BB565H7912XTSA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BB565H7912XTSA1 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 BB565H7912XTSA1?

For technical support, including BB565H7912XTSA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BB565H7912XTSA1 requirements.

6.How does Aetrix verify that BB565H7912XTSA1 is sourced from the original manufacturer or authorized distributors?

All BB565H7912XTSA1 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 BB565H7912XTSA1 meets industry standards.

7.What is the process for return or replacement of BB565H7912XTSA1?

All BB565H7912XTSA1 units undergo pre-shipment inspection (PSI). If there is an issue with BB565H7912XTSA1, 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 BB565H7912XTSA1 part is unused and in its original packaging.

Return procedure for BB565H7912XTSA1:

1.Submit a request within 90 days.

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

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