Infineon Technologies BB669E7904HTSA1

Overview

BB669E7904HTSA1 from Infineon Technologies is a silicon tuning diode (varactor) designed for VHF TV tuner front-end voltage-controlled oscillator (VCO) and filter tuning circuits. It delivers a capacitance range of 2.5–61.5 pF at 1 MHz, 18–23.2× capacitance ratio (VR = 1 V / 28 V), and low series resistance of 0.85 Ω (typ.) at 470 MHz - enabling high-Q resonant tank performance in compact analog tuners.

For engineers reviewing the BB669E7904HTSA1 datasheet, BB669E7904HTSA1 pinout, BB669E7904HTSA1 application, or BB669E7904HTSA1 equivalent, key selection criteria include its SC79 package footprint, ±2% capacitance matching across 7-diode sequences, -55°C to +150°C operating range, and RoHS-compliant Pb-free construction suitable for high-reliability broadcast receiver designs.

Technical Context

This varactor operates under reverse-bias conditions only, with capacitance controlled by applied DC tuning voltage (1–28 V). Its nonlinear C–V curve is optimized for VHF band (30–300 MHz) resonance stability, supported by low temperature coefficient of capacitance (TCC) and tight process-matched unit-to-unit variation.

The device uses an "in-line" matching assembly method to achieve ≤2% ∆CT/CT over 1–28 V, critical for multi-stage filter alignment in analog TV tuner modules. Its 0.6 nH series inductance and sub-1.2 Ω rS ensure minimal Q degradation at 470 MHz, preserving signal selectivity in RF front-end stages.

Key Specifications

Pinout & Package

BB669E7904HTSA1 is housed in the SC79 (SOD-523) surface-mount package: 1.2 mm × 0.8 mm × 0.6 mm, cathode-marked top-side dot, single-anode/single-cathode configuration.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BB669E7904HTSA1, BAS16W sacrifices tuning range and Q for cost-sensitive switching roles, while BBY52-02W trades VHF matching precision for extended UHF coverage - making BB669E7904HTSA1 uniquely suited for production-grade analog TV tuner calibration.

Availability

BB669E7904HTSA1 is available at Aetrix Electronics and suitable for VHF analog TV tuners, FM radio front-ends, and set-top box IF filter calibration requiring stable component supply, tight capacitance matching, and high-temperature reliability.

Supply support for BB669E7904HTSA1 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, automotive, and RF components, with global R&D and manufacturing infrastructure.

BB669E7904HTSA1 belongs to Infineon's BB6xx silicon tuning diode product line, engineered specifically for high-uniformity analog RF tuning in broadcast receiver systems operating up to 300 MHz.

FAQ

What is the maximum reverse voltage rating for BB669E7904HTSA1?

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

Does BB669E7904HTSA1 require derating at elevated temperatures?

Yes - reverse current increases to 200 nA max at 85°C (vs. 10 nA at 25°C), and capacitance values shift with temperature coefficient (TCC) ranging from –5×10⁻⁴ to –1×10⁻³ /°C depending on bias voltage. Designers must verify C–V curves from Figure 3 in the 2011-06-15 datasheet for thermal operating points.

Can BB669E7904HTSA1 be used in DC-coupled tuning circuits?

No - it is strictly a reverse-biased varactor. Forward conduction degrades junction integrity and causes irreversible capacitance hysteresis. All applications must maintain DC bias within 0 V to –28 V (cathode positive), with AC modulation amplitude kept below 100 mVpp to avoid forward excursion.

Is the SC79 package compatible with standard reflow profiles?

Yes - the Pb-free SC79 package is qualified for IPC/JEDEC J-STD-020D-compliant lead-free reflow, with peak temperature ≤260°C for ≤10 seconds. The 0.6 mm height and 0.2 mm electrode spacing require stencil aperture control to prevent bridging during paste deposition.