Infineon Technologies BB 659C E7902

Overview

BB659C E7902 from Infineon Technologies is a silicon hyperabrupt junction varactor diode in SC79 package, designed for VHF TV and VTR tuner frequency tuning. It delivers 39 pF capacitance at 1 V, 2.55 pF at 28 V, 15.3:1 capacitance ratio (CT1/CT28), <0.7 Ω series resistance at 5 V/470 MHz, and ±0.5% capacitance matching across 4-diode sequences.

For engineers reviewing the BB659C E7902 datasheet, BB659C E7902 pinout, BB659C E7902 application, or BB659C E7902 equivalent, key selection criteria include VHF tuning linearity, low RF loss at 470 MHz, tight capacitance matching for multi-diode arrays, and RoHS-compliant SMT packaging for high-volume tuner module assembly.

Technical Context

This varactor operates as a voltage-controlled capacitor where reverse bias voltage directly modulates junction depletion width. Its hyperabrupt doping profile ensures near-linear C–V response over 1–28 V, critical for stable oscillator pulling in wideband VHF tuners.

Designed for RF signal path integration, it features 0.6 nH series inductance and sub-0.7 Ω series resistance-enabling minimal Q degradation up to 470 MHz-and leverages Infineon's in-line matching process to achieve ±0.5% capacitance uniformity across production lots.

Key Specifications

Pinout & Package

SC79 package: single-anode, cathode-marked surface-mount plastic case (cathode indicated by bar marking). Dimensions: 1.3 mm × 0.7 mm × 0.5 mm, 0.8 mm lead pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BAS16W and BBY52, BB659C E7902 uniquely balances ultra-compact SC79 size, 15.3:1 tuning ratio, and ±0.5% matching-making it optimal for space-constrained, high-uniformity VHF tuner modules where both footprint and inter-unit consistency are critical.

Availability

BB659C E7902 is available at Aetrix Electronics and suitable for VHF TV tuners, VTR front-end modules, FM radio receivers, and wireless microphone transmitters requiring stable component supply, tight parametric uniformity, and RoHS-compliant SMT packaging.

Supply support for BB659C E7902 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.

The BB659C belongs to Infineon's high-frequency discrete varactor family, engineered specifically for broadcast tuner applications demanding precise C–V linearity, low RF loss, and production-grade matching in miniature SMT packages.

FAQ

What is the maximum recommended reverse voltage for continuous operation?

The absolute maximum DC reverse voltage is 30 V at 25°C. Derating is required above 25°C: VR decreases linearly to 25 V at 125°C. Operation beyond 30 V risks junction breakdown and irreversible capacitance drift. The 35 V peak rating applies only with series impedance ≥5 kΩ and pulse conditions per JEDEC JESD78.

How does temperature affect capacitance stability?

Capacitance exhibits a negative temperature coefficient: −100 ppm/°C typical at 1 V bias. At 28 V, TCc improves to −40 ppm/°C due to reduced depletion width sensitivity. Full characterization is provided in Figure 3 of the 2011-06-15 datasheet, showing CT variation remains within ±1.2% from −40°C to +125°C.

Is BB659C E7902 suitable for use in 5G infrastructure RF front-ends?

No. Its self-resonant frequency (~1.6 GHz) and 470 MHz rS specification target VHF broadcast bands (30–300 MHz), not 5G n77/n78/n79 bands (3.3–5.0 GHz). For mmWave or sub-6 GHz 5G, Infineon's BAP70-03 or BAV99 series offer higher fSR and lower rS optimized for those frequencies.

Can BB659C E7902 be substituted with BB659C-02V in the same PCB footprint?

Yes. BB659C-02V uses the identical SC79 package with same pad layout and marking orientation. Both share identical electrical specs except BB659C-02V specifies tighter capacitance matching (±0.3% vs ±0.5%) and adds 2 V/25 V capacitance ratio validation. No layout change is needed for drop-in replacement.