Infineon Technologies BBY5705WH6327XTSA1

Overview

BBY5705WH6327XTSA1 from Infineon Technologies is a hyperabrupt silicon tuning diode optimized for voltage-controlled oscillators (VCOs) in mobile communications equipment, featuring 18.6 pF capacitance at 1 V, 2.45 capacitance ratio (CT₁/CT₃), and 0.3 Ω series resistance at 470 MHz - enabling low-voltage tuning with high Q and linearity.

For engineers reviewing the BBY5705WH6327XTSA1 datasheet, BBY5705WH6327XTSA1 pinout, BBY5705WH6327XTSA1 application, or BBY5705WH6327XTSA1 equivalent, key selection criteria include reverse voltage rating (10 V), temperature coefficient of capacitance (–3×10⁻² to +1×10⁻² /°C), capacitance vs. tuning voltage curve, RoHS-compliant SOT323 package, and AEC-Q101 qualification for automotive timing modules.

Technical Context

This tuning diode employs a hyperabrupt junction profile to deliver near-linear C–V response over 1–4 V, supporting stable phase noise performance in VCOs. Its low series resistance (≤0.3 Ω) and high capacitance ratio (min. 2.45, typ. 3.7) enable wide tuning range with minimal loss at RF frequencies up to 470 MHz.

The device operates across –55 °C to +125 °C and exhibits normalized capacitance variation ≤±4% over that range at 1 V and 4 V bias. Temperature coefficient of capacitance (TCC) is voltage-dependent, ranging from –3×10⁻² to +1×10⁻² /°C, critical for TCXO/VCXO loop stability.

Key Specifications

Pinout & Package

BBY5705WH6327XTSA1 is housed in a RoHS-compliant SOT323 (SC-70) plastic package with gull-wing leads, rated for reflow soldering per JEDEC J-STD-020. The package features a common-cathode configuration with two terminals: anode and cathode.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar voltage-controlled tuning applications.

Compared with BBY5705WH6327XTSA1, BBY58-02W trades tuning linearity for higher baseline capacitance, while SMV1232-011LF delivers lower loss at higher frequencies but lacks AEC-Q101 validation - making BBY5705WH6327XTSA1 optimal for automotive-grade mobile RF front-ends demanding both reliability and mid-band linearity.

Availability

BBY5705WH6327XTSA1 is available at Aetrix Electronics and suitable for mobile handset VCOs, TCXO reference modules, and automotive radar IF synthesizers requiring stable component supply, full traceability, and long-term lifecycle support.

Supply support for BBY5705WH6327XTSA1 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 for mission-critical systems.

BBY5705WH6327XTSA1 belongs to Infineon's BBY57 family of hyperabrupt tuning diodes, engineered specifically for low-voltage, high-linearity RF tuning in space-constrained mobile and automotive timing applications.

FAQ

What is the maximum recommended reverse voltage for continuous operation?

The absolute maximum reverse voltage is 10 V at TA = 25 °C. Derating is required above 25 °C: VR decreases linearly to 7.5 V at +125 °C per the datasheet's thermal derating curve. Exceeding VR risks junction breakdown and irreversible capacitance shift, especially under RF stress.

How does temperature affect capacitance stability at 2.5 V bias?

At 2.5 V reverse bias, capacitance varies by ≤±2.5% from –40 °C to +85 °C, based on normalized C(TA)/C(25°C) data. The temperature coefficient is –1.5×10⁻² /°C near 2.5 V, meaning a 10 °C rise reduces CT by ~1.5%, requiring compensation in precision TCXO loops.

Is BBY5705WH6327XTSA1 compatible with lead-free reflow profiles?

Yes - it is qualified for Pb-free reflow per JEDEC J-STD-020D, with peak temperature up to 260 °C for ≤30 seconds. The SOT323 package withstands standard SAC305 profiles; no special pre-bake is required unless stored >12 months in ambient humidity >60% RH.

Can this diode replace BBY57-02W in existing SCD80 layouts?

No - BBY5705WH6327XTSA1 uses SOT323 (3-pin), while BBY57-02W uses SCD80 (2-pin). Pin count, footprint, thermal pad presence, and cathode marking differ. Direct replacement requires PCB redesign; use BBY57-02W or BBY57-05W for SCD80 compatibility.