Infineon Technologies BB814E6359HTMA1

Overview

BB814E6359HTMA1 from Infineon Technologies is a silicon varactor diode in SOT23 package with common-cathode dual-diode configuration, designed for FM radio tuner VCOs requiring precise capacitance tracking. It delivers 43–46.5 pF capacitance at 2 V, 19.1–22.7 pF at 8 V, 2.05–2.25 capacitance ratio, ≤3% inter-diode matching, and 0.18 Ω series resistance at 100 MHz - enabling stable tuning in automotive car radios.

For engineers reviewing the BB814E6359HTMA1 datasheet, BB814E6359HTMA1 pinout, BB814E6359HTMA1 application, or BB814E6359HTMA1 equivalent, key selection criteria include reverse voltage rating (18 V), low-voltage tuning performance (2–8 V range), dual-diode matching tolerance, SOT23 footprint compatibility, and RoHS-compliant Pb-free packaging for automotive-grade signal tuning circuits.

Technical Context

This monolithic dual varactor integrates two matched silicon junction diodes sharing a common cathode terminal, optimized for voltage-controlled oscillator (VCO) tank circuits in wideband FM tuners. Its capacitance-voltage curve is characterized at 1 MHz with tight group coding (C2V/C8V min/max bins) and guaranteed ≤3% ∆CT/CT matching across both diodes under identical bias conditions.

The device operates over –55 °C to +125 °C, supports peak reverse voltage up to 20 V, and maintains Q ≥ 200 at 100 MHz and VR = 2 V - ensuring low phase noise and high spectral purity in RF tuning applications where thermal stability and tracking consistency are critical.

Key Specifications

Pinout & Package

SOT23-3 package with gull-wing leads, JEDEC standard outline, 1.3 mm × 2.9 mm footprint, 1.15 mm height, and common-cathode configuration (Pin 1: Anode 1, Pin 2: Cathode, Pin 3: Anode 2).

Key Features

Applications

Equivalent & Alternatives

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

Compared with BB814E6359HTMA1, BBY52-02W trades dual-diode integration for smaller footprint but sacrifices tracking; SMV1232-011 matches dual functionality but introduces higher leakage and reduced Q - making BB814E6359HTMA1 optimal for automotive FM tuners demanding matched low-loss tuning.

Availability

BB814E6359HTMA1 is available at Aetrix Electronics and suitable for automotive infotainment systems, portable broadcast receivers, and RF test instrumentation requiring stable component supply, matched dual-varactor performance, and AEC-Q200-aligned reliability.

Supply support for BB814E6359HTMA1 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 R&D and manufacturing infrastructure.

BB814E6359HTMA1 belongs to Infineon's RF Varactor Diode product line, engineered specifically for high-reliability, temperature-stable voltage-controlled tuning in automotive and consumer broadcast front-ends.

FAQ

What is the maximum reverse voltage BB814E6359HTMA1 can withstand continuously?

The BB814E6359HTMA1 has a DC reverse voltage rating (VR) of 18 V and a peak reverse voltage (VRM) of 20 V. Continuous operation above 18 V risks irreversible junction breakdown. In automotive environments, transient suppression must ensure bias stays within this limit during load-dump events.

How does the common-cathode configuration affect PCB layout in a differential VCO?

The shared cathode (Pin 2) must be routed as a low-inductance, low-resistance node - ideally connected directly to ground plane or RFC-biased rail. Separating anode traces (Pins 1 and 3) equally prevents asymmetry; mismatched trace lengths degrade capacitance tracking beyond the specified ≤3% ∆CT/CT.

Is BB814E6359HTMA1 suitable for 5G sub-6 GHz tunable filters?

No. Its capacitance range (19–47 pF) and Q factor (200 at 100 MHz) are optimized for HF/VHF/UHF tuning (up to ~250 MHz). At 3.5 GHz, series resistance dominates and effective Q drops below 30 - insufficient for narrowband 5G filter selectivity. Use GaAs-based varactors for >1 GHz applications.

Can BB814E6359HTMA1 replace BB814E6329HTMA1 in existing designs?

Yes - both share identical SOT23 package, pinout, and electrical specs. BB814E6359HTMA1 is a later revision with updated traceability coding (HTMA1 suffix) and tighter binning per Application Note 047. No layout or bias changes are required; it is a drop-in replacement with enhanced production matching consistency.