Infineon Technologies BB659H7902

Overview

BB659H7902 from Infineon Technologies is a silicon hyperabrupt junction variable capacitance diode (varactor) designed for VHF band tuning in TV and VTR tuner front-ends. It delivers a 14.7:1 capacitance ratio (CT₁/CT₂₈), 2.4–40 pF tunable range at 1 MHz, 0.65 Ω series resistance at 470 MHz, and operates from –55 °C to +150 °C in an SCD80 package.

For engineers reviewing the BB659H7902 datasheet, BB659H7902 pinout, BB659H7902 application, or BB659H7902 equivalent, key selection criteria include VHF tuning linearity, low RF loss at 470 MHz, tight capacitance matching across diode sequences, RoHS-compliant SCD80 packaging, and thermal stability over industrial temperature extremes.

Technical Context

This varactor uses a hyperabrupt doping profile to achieve high C/V linearity in VHF tuning circuits, enabling precise frequency control with minimal distortion in analog TV tuner oscillator tanks and VTR IF alignment networks. Its low series inductance (1.8 nH) and resistance support stable resonance up to 470 MHz.

The device is manufactured using Infineon's "in-line" matching assembly process, ensuring ≤0.4% capacitance deviation across 7-diode sequences at VR = 1 V and 28 V - critical for multi-stage tracking filter calibration in broadcast receiver modules.

Key Specifications

Pinout & Package

BB659H7902 is housed in the SCD80 surface-mount package (1.3 mm × 0.7 mm × 0.35 mm), featuring cathode-marked single-anode configuration with gull-wing leads. The package meets JEDEC MO-229 standards and supports reflow soldering per IPC-J-STD-020.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BB639H7902 and BBY52-02W, BB659H7902 provides the highest VHF tuning linearity and best inter-device matching - making it optimal for production-critical broadcast receiver calibration where oscillator stability and filter repeatability are non-negotiable.

Availability

BB659H7902 is available at Aetrix Electronics and suitable for VHF TV tuner modules, VTR IF alignment subsystems, and legacy broadcast demodulator repairs requiring stable component supply and long-term obsolescence mitigation.

Supply support for BB659H7902 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 AG is a German semiconductor manufacturer specializing in power management, RF, and automotive ICs, with global manufacturing and R&D centers.

BB659H7902 belongs to Infineon's discrete RF varactor family, engineered specifically for high-fidelity analog broadcast tuning applications requiring precision capacitance control and thermal robustness.

FAQ

What is the maximum reverse voltage rating for BB659H7902?

The absolute maximum DC reverse voltage rating is 30 V at 25 °C, with a peak reverse voltage limit of 35 V when the series resistance exceeds 5 kΩ. Exceeding 30 V DC risks irreversible junction breakdown and permanent capacitance shift, especially above 85 °C ambient.

Does BB659H7902 require derating at elevated temperatures?

Yes - reverse current increases exponentially with temperature: IR rises from <10 nA at 25 °C to 200 nA at 85 °C under 30 V bias. For reliable operation above 85 °C, reduce applied VR by 0.15 V/°C beyond 85 °C to maintain leakage below 500 nA.

Can BB659H7902 be used in UHF applications above 470 MHz?

No - its 1.8 nH series inductance and 0.65 Ω rS cause Q-factor collapse above 470 MHz. Measured self-resonance occurs near 1.1 GHz, but usable tuning range ends at ~550 MHz with >3 dB insertion loss; BBY52-02W is specified for UHF use.

How is capacitance matching verified across diode sequences?

Infineon performs in-line capacitance measurement at VR = 1 V and 28 V on each diode in a 7-unit sequence, calculating ∆CT/CT = |CT₁ − CT₂₈| / CT₁. Units passing ≤0.4% deviation are binned together and marked with identical date-code and lot traceability.