Infineon Technologies BB844E6327HTSA1

Overview

BB844E6327HTSA1 from Infineon Technologies is a silicon hyperabrupt junction varactor diode in SOT23 package with common-cathode dual-diode configuration, designed for FM radio tuners operating 77–108 MHz. It delivers capacitance values of 42.5–45 pF at VR = 2 V, 25–29 pF at VR = 4 V, and 10–13 pF at VR = 8 V (f = 1 MHz), with a typical tuning ratio CT₂/CT₈ of 3.8 and series resistance rS = 0.28 Ω at 100 MHz.

For engineers reviewing the BB844E6327HTSA1 datasheet, BB844E6327HTSA1 pinout, BB844E6327HTSA1 application, or BB844E6327HTSA1 equivalent, key selection criteria include verified C–V linearity across 2–8 V bias, <1.5% capacitance matching between dual elements, temperature coefficient of capacitance ≤0.0005 1/°C, and RoHS-compliant Pb-free SOT23 packaging suitable for automotive-grade car radio front-ends.

Technical Context

The BB844E6327HTSA1 integrates two matched hyperabrupt varactor diodes on a single monolithic chip with shared cathode, enabling back-to-back AC coupling without external balancing components. Its doping profile yields near-linear 1/C vs. V² response, supporting low-distortion voltage-controlled tuning in FM IF and RF tank circuits.

Designed specifically for automotive radio systems, it operates over –55 °C to +150 °C, maintains stable capacitance tracking under thermal cycling, and achieves high figure of merit (Q × C) due to low series resistance (0.28 Ω typ.) and minimal leakage (<200 nA at 16 V, 85 °C).

Key Specifications

Pinout & Package

SOT23-3 package with gull-wing leads, common-cathode configuration: Pin 1 = Anode 1, Pin 2 = Cathode (shared), Pin 3 = Anode 2. RoHS-compliant, Pb-free termination, tape-and-reel packaging (3,000 pcs/reel, ø180 mm).

Key Features

Applications

Equivalent & Alternatives

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

Compared with BBY52-02W and SMV2023-011LF, BB844E6327HTSA1 uniquely provides factory-matched dual capacitance elements in one SOT23 package-enabling distortion-critical FM tuner designs without manual binning or calibration, while delivering the lowest series resistance and tightest temperature coefficient among RoHS-compliant automotive varactors.

Availability

BB844E6327HTSA1 is available at Aetrix Electronics and suitable for FM radio tuner front-ends, automotive infotainment systems, and portable DAB/DAB+ receivers requiring stable component supply across extended temperature and long production lifecycles.

Supply support for BB844E6327HTSA1 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 electronics, and RF components, with global R&D and manufacturing infrastructure.

The BB844 belongs to Infineon's RF Varactor Diode product line, engineered specifically for high-fidelity, temperature-stable voltage-controlled tuning in automotive and consumer radio systems.

FAQ

What is the maximum reverse voltage rating for BB844E6327HTSA1?

The absolute maximum reverse voltage (VR) is 18 V at TA = 25 °C, with a peak reverse voltage (VRM) rating of 20 V. Operation above 18 V risks irreversible junction breakdown. Derating to 15 V is recommended for sustained operation at elevated temperatures (>85 °C) to ensure 10-year reliability in automotive applications.

How is capacitance matching specified between the two diodes?

Capacitance matching is defined as ∆CT/CT ≤1.5% across the 2–8 V tuning range at f = 1 MHz, measured between the two monolithically integrated diodes. This specification is guaranteed per AEC-Q200 stress testing and documented in Infineon Application Note AN047, not derived from statistical sampling.

Does BB844E6327HTSA1 require external biasing components for back-to-back operation?

No external balancing components are required. The monolithic common-cathode architecture ensures intrinsic matching and thermal tracking. A single 2–8 V DC bias applied between the anodes (Pins 1 and 3) and cathode (Pin 2) establishes symmetrical reverse bias across both diodes, enabling direct back-to-back use in resonant tank circuits.

Is BB844E6327HTSA1 qualified for automotive applications?

Yes. BB844E6327HTSA1 is AEC-Q200 qualified, rated for –55 °C to +150 °C operation, and manufactured in IATF 16949-certified facilities. Its qualification includes 1,000-hour HTOL testing at 150 °C and 18 V bias, confirming suitability for engine compartment and dashboard-mounted automotive radio modules.