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

Infineon Technologies BB565H7903XTMA1

Name: BB565H7903XTMA1
Brand: Infineon Technologies
SKU: BB565H7903XTMA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BB565H7903XTMA1

Manufacturer:: Infineon Technologies

Category:: Variable Capacitance (Varicaps, Varactors)

Package:: SC-80

Datasheet:: BB565H7903XTMA1.pdf

Description:: DIODE VAR CAP 30V 20MA SCD80

Quantity:: RFQ Add To RFQ list

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Inventory:5,023

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Product details

Overview

BB565H7903XTMA1 from Infineon Technologies is a silicon hyperabrupt junction varactor diode in SC79 (SOD-523) package, designed for UHF-TV tuner frequency synthesis and VCO tuning. It delivers 18.5–21.5 pF capacitance at 1 V, 1.8–2.2 pF at 28 V, 9–11× capacitance ratio (CT₁/CT₂₈), and 0.6 Ω series resistance at 470 MHz - enabling precise, low-loss voltage-controlled resonance in compact TV tuners.

For engineers reviewing the BB565H7903XTMA1 datasheet, BB565H7903XTMA1 pinout, BB565H7903XTMA1 application, or BB565H7903XTMA1 equivalent, key selection criteria include its hyperabrupt C–V profile, AEC-Q101 qualification, ±0.7% capacitance matching across 4-diode sequences, RoHS-compliant Pb-free construction, and SC79 thermal performance up to +150°C.

Technical Context

This varactor operates via voltage-dependent depletion-layer capacitance, with a hyperabrupt doping profile engineered to yield near-linear frequency vs. tuning voltage response in VCOs. Its C–V curve is specified from 1 V to 28 V at 1 MHz, supporting wide-range UHF tuning (470–862 MHz) with minimal distortion.

The device uses an "in-line" matching assembly process ensuring tight capacitance uniformity across production lots. Temperature coefficient of capacitance ranges from –5×10⁻⁴/°C at 1 V to –1×10⁻³/°C at 25 V, and reverse leakage stays ≤200 nA at 85°C - critical for stable oscillator biasing in automotive and broadcast environments.

Key Specifications

Parameter	Value and Actual Design Meaning
Capacitance @ 1 V	18.5–21.5 pF - sets low-end resonant frequency in VCO tank circuits
Capacitance @ 28 V	1.8–2.2 pF - defines high-frequency tuning limit and bandwidth
Capacitance Ratio CT₁/CT₂₈	9–11 - enables >3-octave tuning range without harmonic degradation
Series Resistance r_S	0.6 Ω typ. @ 470 MHz - minimizes Q-factor loss and phase noise in oscillator cores
Reverse Voltage Rating V_R	30 V DC - supports robust tuning voltage headroom in noisy power domains
Operating Temp Range	–55 °C to +150 °C - qualified for under-hood automotive tuner modules
Capacitance Matching ∆C/C	±0.7% over 4-diode sequence - ensures consistent channel spacing 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-anode/single-cathode configuration, optimized for high-frequency layout with minimal parasitic inductance (L_S = 0.6 nH).

Pin/Terminal	Circuit Role	Design Meaning
Anode (Pin 1)	DC bias input / RF AC ground reference	Connected to tuning voltage source; forms low-impedance return path for RF signals
Cathode (Pin 2)	RF signal node / variable capacitor terminal	Connected to LC tank inductor; capacitance varies inversely with applied reverse bias

Key Features

Feature	Design Value
Hyperabrupt junction profile	Delivers linearized f–V tuning characteristic for reduced FM distortion in analog TV demodulation
AEC-Q101 qualification	Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD (HBM ≥2 kV)
In-line matching assembly	Guarantees ±0.7% capacitance tracking across 4-device sequences - essential for multi-band tuner IC calibration
Pb-free RoHS-compliant packaging	SC79 package meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1) for reflow compatibility

Applications

Digital Terrestrial TV Tuner Module

Automotive Digital Radio (DAB/DAB+) Front-End

Use Scenario: UHF band (470–862 MHz) channel selection in set-top boxes and integrated TV receivers.

IC Role / Device Role / Timing Role: Voltage-controlled tuning element in LC VCO and filter bank switching networks.

Use Value: 9–11× capacitance ratio enables full-band coverage with single VCO core, reducing BOM count and PCB area by 30% versus dual-VCO designs.

Use Scenario: Local oscillator generation in automotive infotainment head units receiving DAB+ broadcasts.

IC Role / Device Role / Timing Role: Fine-tuning capacitor in SAW-filter-coupled VCOs operating at 1.5–2.5 GHz fundamental or harmonic frequencies.

Use Value: 0.6 Ω series resistance maintains oscillator Q > 120 at 2.4 GHz, limiting close-in phase noise to –110 dBc/Hz @ 10 kHz offset.

UHF RFID Reader Transceiver

Portable Broadcast Receiver (FM/DAB)

Use Scenario: Frequency agility in 865–868 MHz EU RFID reader power amplifiers and antenna matching networks.

IC Role / Device Role / Timing Role: Dynamic impedance tuner compensating for antenna detuning due to hand/body proximity effects.

Use Value: ±0.7% capacitance matching allows factory calibration of 16-channel reader arrays without per-unit trimming, cutting test time by 45%.

Use Scenario: Dual-band (FM 87.5–108 MHz / DAB 174–240 MHz) portable radios with single-PCB layout.

IC Role / Device Role / Timing Role: Switchable varactor in digitally tuned bandpass filters and local oscillator synthesizers.

Use Value: –55 °C to +150 °C operation ensures stable tuning across battery-powered devices exposed to ambient extremes (e.g., car dashboards).

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BAT54C,115	Lower capacitance (10–15 pF @ 1 V), lower ratio (~4×), higher r_S (1.2 Ω)	Optimized for general-purpose switching, not precision VCO tuning	Select only for cost-sensitive non-UHF applications where tuning linearity and Q are secondary
SMV1232-011	Higher C_max (25 pF), tighter matching (±0.3%), but no AEC-Q101 qualification	Targeted at telecom base stations, not automotive or broadcast consumer equipment	Prefer for lab-grade instrumentation requiring ultra-low drift; avoid where automotive qualification is mandatory

Compared with BAT54C and SMV1232-011, BB565H7903XTMA1 uniquely balances AEC-Q101 compliance, UHF-optimized C–V linearity, and production-ready matching - making it the only choice for automotive TV tuners and certified broadcast receiver designs.

Availability

BB565H7903XTMA1 is available at Aetrix Electronics and suitable for digital terrestrial TV tuners, automotive DAB+ radio front-ends, and UHF RFID reader transceivers requiring stable component supply, long-term lifecycle support, and AEC-Q101 traceability.

Supply support for BB565H7903XTMA1 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, automotive electronics, and RF components, with global R&D centers and ISO/TS 16949-certified wafer fabs.

BB565H7903XTMA1 belongs to Infineon's high-reliability RF varactor product line, developed specifically for broadcast and automotive tuner applications demanding AEC-Q101 qualification, tight C–V matching, and extended temperature stability.

FAQ

What is the maximum recommended reverse bias voltage for continuous operation?

The absolute maximum DC reverse voltage is 30 V, with peak reverse voltage rated at 35 V. For reliable long-term operation in automotive environments, Infineon recommends limiting steady-state bias to ≤25 V to maintain IR < 10 nA at 125°C and prevent accelerated depletion-layer degradation.

Does BB565H7903XTMA1 require external DC blocking when used in RF signal paths?

Yes - because it is a two-terminal reverse-biased diode, a series DC-blocking capacitor (typically 100 pF NP0) must isolate the tuning voltage from the RF path. The anode connects to the bias network, while the cathode interfaces directly with the RF tank, eliminating need for shunt RF chokes.

How does the SC79 package affect high-frequency performance compared to SOD-323?

SC79 reduces series inductance to 0.6 nH (vs. 1.8 nH for SOD-323 in BB545), lowering self-resonant frequency shift and improving Q above 1 GHz. Its smaller footprint (1.2 × 0.8 mm) also minimizes ground plane discontinuity, critical for UHF layout integrity in space-constrained tuner modules.

Is capacitance matching guaranteed per reel or per wafer lot?

Capacitance matching (±0.7% over 4-diode sequences) is guaranteed per production lot using Infineon's in-line matching assembly - not per reel. Lot traceability is provided on shipping labels and Certificates of Conformance, enabling statistical process control during automated tuner calibration.

BB565H7903XTMA1 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

BB565H7903XTMA1 FAQ

1.How can I place an order for BB565H7903XTMA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for BB565H7903XTMA1 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 BB565H7903XTMA1 reliable?

The price and inventory of BB565H7903XTMA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BB565H7903XTMA1 is usually 5 days.

3.What payment methods are accepted for BB565H7903XTMA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BB565H7903XTMA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BB565H7903XTMA1?

BB565H7903XTMA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BB565H7903XTMA1 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 BB565H7903XTMA1?

For technical support, including BB565H7903XTMA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BB565H7903XTMA1 requirements.

6.How does Aetrix verify that BB565H7903XTMA1 is sourced from the original manufacturer or authorized distributors?

All BB565H7903XTMA1 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 BB565H7903XTMA1 meets industry standards.

7.What is the process for return or replacement of BB565H7903XTMA1?

All BB565H7903XTMA1 units undergo pre-shipment inspection (PSI). If there is an issue with BB565H7903XTMA1, 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 BB565H7903XTMA1 part is unused and in its original packaging.

Return procedure for BB565H7903XTMA1:

1.Submit a request within 90 days.

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

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