NXP Semiconductors BGY885B,112

Overview

BGY885B,112 from NXP Semiconductors (formerly Philips Semiconductors) is a hybrid push-pull RF amplifier module designed for CATV distribution systems. It delivers 20 dB small-signal power gain at 860 MHz, operates from a 24 V DC supply, draws ≤235 mA total current, and supports 40–860 MHz bandwidth with ±0.3 dB flatness. It is used in trunk and distribution amplifiers for multi-channel cable TV signal boosting.

For engineers reviewing the BGY885B,112 datasheet, BGY885B,112 pinout, BGY885B,112 application, or BGY885B,112 equivalent, key selection criteria include its 75 Ω input/output impedance, gold-metallized SOT115J package, composite distortion performance (CTB/CSO ≤ −60 dB), noise figure (≤7.5 dB at 860 MHz), and rugged 24 V operation with transient tolerance up to 30 V.

Technical Context

The BGY885B,112 implements a silicon-based hybrid push-pull architecture optimized for linear broadband amplification in 75 Ω CATV infrastructure. Its design targets low intermodulation distortion across 49-channel flat spectra, with CTB and CSO both specified at −60 dB under defined test conditions (Vo = 44 dBmV).

It features silicon nitride passivation and gold metallization for reliability in thermally demanding mounting environments, with operating base temperature range of −20 °C to +100 °C and storage up to +100 °C. Input and output return loss exceeds 14 dB across 40–860 MHz, supporting stable cascaded amplifier staging.

Key Specifications

Pinout & Package

SOT115J: rectangular single-ended metal-flange package with 7 gold-plated in-line leads, aluminum base for heatsinking, and dual vertical 6-32 UNC mounting holes.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar broadband RF amplifier applications.

Compared with MAX2109ETX+ and QPL9057TR13, the BGY885B,112 uniquely combines 24 V operation, 75 Ω impedance, flange-mounted thermal management, and verified −60 dB CTB/CSO in a rugged hybrid module-making it irreplaceable for field-deployed CATV amplification where reliability and spectral purity are non-negotiable.

Availability

BGY885B,112 is available at Aetrix Electronics and suitable for CATV trunk amplifiers, distribution nodes, two-way active splitters, and optical node power insertion circuits requiring stable component supply and long-lifecycle support.

Supply support for BGY885B,112 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 leader focused on secure connectivity solutions for automotive, industrial, and communication infrastructure markets.

The BGY885B,112 belongs to NXP's legacy CATV amplifier portfolio, engineered specifically for high-reliability, high-linearity RF amplification in cable television distribution networks operating up to 860 MHz.

FAQ

What is the maximum RF input voltage rating for BGY885B,112?

The BGY885B,112 has a maximum RF input voltage rating of 65 dBmV, as specified in the Absolute Maximum Ratings table. This corresponds to approximately 1.95 V_pp into 75 Ω and defines the upper limit before risk of parametric shift or damage. Operation should remain below this level under all conditions, including transient surges and multi-tone loading.

Does BGY885B,112 require external bias circuitry?

No, the BGY885B,112 is a fully self-biased hybrid module. It operates directly from a 24 V DC supply applied to pin 5 (+VB) with no external resistors, capacitors, or adjustment needed. Internal bias networks ensure stable quiescent current and gain across temperature, simplifying PCB layout and reducing bill-of-materials count.

Is BGY885B,112 compatible with 50 Ω systems?

The BGY885B,112 is strictly designed for 75 Ω CATV infrastructure and is not impedance-matched for 50 Ω systems. Its input and output return loss degrades significantly below 14 dB when terminated in 50 Ω, causing gain ripple, increased distortion, and potential instability. Use only in 75 Ω applications unless external matching networks are added-and even then, linearity and flatness specifications no longer apply.

What is the thermal resistance (R_th) from junction to case for BGY885B,112?

The datasheet does not specify R_th(j-c) for the BGY885B,112. However, its SOT115J package features an aluminum flange designed for direct thermal coupling to a heatsink or chassis. For reliable operation at T_mb = +100 °C, mounting torque on the 6-32 UNC screws must be maintained at 5–7 in·lb, and thermal interface material (e.g., silicone grease) is recommended to minimize contact resistance.

Can BGY885B,112 be used in DOCSIS 4.0 upstream bands?

No, the BGY885B,112 is not characterized for upstream operation above 860 MHz and lacks specifications for frequencies beyond that range. Its gain rolls off above 860 MHz, and distortion metrics (CTB/CSO) are only validated up to 860.5 MHz. For DOCSIS 4.0 upstream (up to 204 MHz or extended to 300 MHz depending on region), dedicated upstream amplifiers with appropriate noise and linearity specs must be used instead of BGY885B,112.