NXP Semiconductors BB153,135

Overview

BB153 from NXP Semiconductors is a planar-technology variable capacitance diode (varactor) in SOD323 (SC-76) package, designed for electronic tuning in VHF television tuners (band B, up to 460 MHz) and Voltage-Controlled Oscillators (VCOs). It delivers Cd(1 V) = 34.65–42.35 pF, Cd(28 V) = 2.361–2.754 pF, capacitance ratio of 13.5–15, series resistance rs = 0.65–0.8 Ω at 100 MHz, and matching accuracy ≤2 % via Direct Matching Assembly (DMA).

For engineers reviewing the BB153 datasheet, BB153 pinout, BB153 application, or BB153 equivalent, key selection criteria include reverse voltage rating (32 V), low series resistance for high-Q VCO design, tight capacitance matching across diode pairs, and stable performance from −55 °C to +125 °C junction temperature.

Technical Context

The BB153 operates as a reverse-biased junction varactor, where capacitance varies nonlinearly with applied DC reverse voltage (1–28 V). Its planar structure enables precise doping control, supporting high linearity and reproducible C–V characteristics per Figure 1 of the datasheet.

Capacitance tuning is optimized for VHF band B (up to 460 MHz) and relies on gliding matching and DMA assembly to achieve ≤2 % capacitance deviation across sequences of 10 diodes - critical for balanced VCO core and tuner front-end symmetry.

Key Specifications

Pinout & Package

Package: SOD323 (SC-76), plastic surface-mounted, 2-lead, 1.35 × 0.8 mm body, cathode indicated by marking bar.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BBY52,115 and SMV1232-011, the BB153 uniquely combines 15× capacitance ratio, sub-0.8 Ω series resistance, and factory-matched ≤2 % tolerance - making it optimal for high-stability, high-frequency VCOs where tuning linearity and pair consistency are critical.

Availability

BB153 is available at Aetrix Electronics and suitable for VHF television tuners, voltage-controlled oscillators, FM radio front-ends, and RF filter tuning modules requiring stable component supply and traceable sourcing.

Supply support for BB153 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

NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and consumer applications.

The BB153 belongs to NXP's RF varactor diode product line, engineered specifically for high-linearity, high-stability electronic tuning in VHF broadcast and communications equipment.

FAQ

What is the maximum reverse voltage rating for the BB153?

The BB153 has an absolute maximum reverse voltage (VR) rating of 32 V, with a peak reverse voltage (VRM) of 35 V when used in series with a 10 kΩ resistor. Exceeding 32 V DC reverse bias risks permanent junction damage per IEC 60134 limiting values. The BB153 is rated for continuous operation up to this limit under specified thermal conditions.

How does the BB153 achieve its 2 % capacitance matching specification?

The BB153 achieves ≤2 % capacitance matching through a Direct Matching Assembly (DMA) procedure combined with gliding matching across sequences of 10 diodes. This factory-level process selects and groups diodes based on measured C–V curves at 1 V and 28 V, ensuring tight tracking for differential VCO and balanced tuner applications. The BB153 datasheet confirms this matching applies to VR = 1 V to 28 V.

What is the typical series resistance (rs) of the BB153 and why does it matter?

BB153 exhibits a typical series resistance (rs) of 0.65 Ω, with a maximum of 0.8 Ω at 100 MHz and Cd = 30 pF. This low rs value minimizes resistive losses in high-frequency resonant circuits, directly improving Q-factor and reducing phase noise in VCO designs - a critical parameter confirmed in Table 5 of the BB153 datasheet.

Can the BB153 be used in automotive applications?

No - the BB153 is not automotive-qualified. Per section 9.3 of the BB153 datasheet, unless explicitly stated, NXP products like the BB153 are not tested or warranted for automotive use. Its qualification covers industrial and consumer VHF tuning applications only. For automotive systems, designers must select components with explicit AEC-Q200 certification.

What package type and marking does the BB153 use?

The BB153 uses the SOD323 (SC-76) plastic surface-mounted package, measuring 1.35 × 0.8 mm with 0.45 mm lead pitch. It is marked with code "PC" on the top surface, and the cathode is identified by a visible marking bar aligned with Pin 1, as shown in Figure 4 and Table 1 of the BB153 datasheet.