Infineon Technologies BB56502VH7902XTSA1

Overview

BB56502VH7902XTSA1 from Infineon Technologies is a silicon hyperabrupt junction varactor diode in SC79 (SOD-523) package, designed for UHF-TV tuner voltage-controlled oscillator (VCO) and RF filter 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), 0.6 Ω series resistance at 470 MHz, and operates from –55 °C to +150 °C.

For engineers reviewing the BB56502VH7902XTSA1 datasheet, BB56502VH7902XTSA1 pinout, BB56502VH7902XTSA1 application, or BB56502VH7902XTSA1 equivalent, key selection criteria include tunable capacitance range, high C-ratio for wide frequency coverage, low rₛ for minimal insertion loss in resonant circuits, thermal stability across automotive-grade temperature extremes, and RoHS-compliant SC79 packaging for space-constrained UHF front-ends.

Technical Context

This varactor operates via voltage-dependent depletion-layer width modulation, enabling precise analog tuning of LC tank resonance in RF signal paths. Its hyperabrupt doping profile ensures near-linear frequency vs. tuning voltage (f ∝ 1/√C) behavior over 1–28 V reverse bias, critical for stable channel selection in terrestrial digital TV tuners.

Capacitance matching is guaranteed by "in-line" assembly of up to four diodes per sequence (per BB565/-02V spec), with ≤1.5% ∆C/C variation across the 1–28 V range. Temperature coefficient is specified as ±0.001%/°C at 1 V and ±0.0003%/°C at 25 V, supporting stable VCO operation under thermal cycling.

Key Specifications

Pinout & Package

BB56502VH7902XTSA1 uses the 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, and tape-and-reel packaging (8,000 pcs/reel, 2 mm pitch).

Key Features

Applications

Equivalent & Alternatives

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

Compared with BB56502VH7902XTSA1, BB56502VH7902XTMA1 offers identical RF performance with different logistics packaging, while BBY52-02W trades UHF coverage breadth for higher low-voltage capacitance-making the BB56502VH7902XTSA1 optimal for digital TV tuner designs demanding maximum frequency span and thermal robustness.

Availability

BB56502VH7902XTSA1 is available at Aetrix Electronics and suitable for digital TV tuners, automotive infotainment receivers, and portable RF test equipment requiring stable component supply, AEC-Q101 qualification, and high-C-ratio varactor performance.

Supply support for BB56502VH7902XTSA1 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 high-reliability discrete components.

BB56502VH7902XTSA1 belongs to Infineon's RF varactor diode product line, engineered specifically for high-linearity, high-ratio tuning in broadcast and wireless infrastructure applications where thermal stability and batch-matching are critical.

FAQ

What is the maximum reverse voltage rating for BB56502VH7902XTSA1?

The absolute maximum DC reverse voltage is 30 V, with a peak reverse voltage of 35 V for short-duration transients. Exceeding 30 V continuously risks irreversible junction breakdown. The device is characterized from 1 V to 28 V for capacitance tuning, and operation beyond 28 V yields diminishing C-change return while increasing leakage and thermal stress.

Does BB56502VH7902XTSA1 require external biasing circuitry?

Yes-it must be reverse-biased via a high-impedance DC voltage source (typically ≥100 kΩ) to avoid loading the RF path. A series RF choke or π-filter is recommended to isolate the tuning voltage rail from RF signals. No internal bias circuitry is integrated; the diode functions purely as a voltage-variable capacitor.

How does temperature affect capacitance stability in BB56502VH7902XTSA1?

At 1 V bias, capacitance varies by ±0.001%/°C; at 25 V, it shifts by ±0.0003%/°C. Over –55 °C to +150 °C, total drift is <±3% relative to 25 °C value. This low TCc enables stable VCO center frequency in thermally unregulated environments like automotive dashboards.

Is BB56502VH7902XTSA1 pin-compatible with other SC79 varactors?

Yes-its anode/cathode pinout matches standard SC79 (SOD-523) orientation: cathode is marked on top surface, anode is unmarked pad. Mechanical and solder footprint compatibility is confirmed per JEDEC MO-203-AB. Electrical compatibility depends on C-V curve alignment; direct substitution requires verification of capacitance range and rₛ at target frequency.