NXP Semiconductors BGY1085A,112

Overview

BGY1085A,112 from NXP Semiconductors is a hybrid push-pull RF amplifier module designed for CATV distribution systems, delivering 18.5 dB power gain at 1000 MHz, operating over 40–1000 MHz bandwidth with +24 V DC supply and 75 Ω impedance matching. It achieves ≤ ±0.3 dB frequency response flatness and −58 dB CTB distortion under 85-channel flat conditions.

For engineers reviewing the BGY1085A,112 datasheet, BGY1085A,112 pinout, BGY1085A,112 application, or BGY1085A,112 equivalent, key selection criteria include its 75 Ω input/output impedance, SOT115J flanged package with gold-plated leads, low noise figure (5.5 dB typ. @50 MHz), rugged construction, and suitability for headend and node amplifier stages in broadband cable infrastructure.

Technical Context

The BGY1085A,112 implements a silicon-based hybrid push-pull architecture optimized for linear amplification across the full 40–1000 MHz CATV spectrum. Its design targets minimal intermodulation distortion-evidenced by −58 dB CTB and −60 dB CSO at 596.5 MHz-with input and output return losses ≥14 dB up to 1000 MHz.

It operates at +24 V DC with total current draw ≤240 mA and supports mounting base temperatures from −20 °C to +100 °C. The module uses silicon nitride passivation and gold metallization for reliability in thermally demanding outdoor plant environments.

Key Specifications

Pinout & Package

SOT115J package: rectangular single-ended aluminum flange with 2 vertical and 2 horizontal 6-32 UNC mounting holes; 7 gold-plated in-line leads; thermal path via flange to heatsink.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX2109ETJ+ and QPL9057, the BGY1085A,112 uniquely combines 75 Ω CATV impedance, flanged SOT115J thermal management, and verified −58 dB CTB performance-making it irreplaceable in legacy and hybrid fiber-coax plant amplification where standards compliance and field reliability are mandatory.

Availability

BGY1085A,112 is available at Aetrix Electronics and suitable for CATV headend amplifiers, fiber node output stages, coaxial trunk line repeaters, and DOCSIS upstream signal boosters requiring stable component supply and long-lifecycle support.

Supply support for BGY1085A,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 leader in high-performance RF, analog, and mixed-signal solutions, with deep expertise in broadband communications and automotive radar technologies.

The BGY1085A,112 belongs to NXP's legacy CATV amplifier product line, engineered specifically for linear, high-reliability RF amplification in cable television distribution infrastructure under real-world thermal and EMI stress.

FAQ

What is the maximum supply voltage the BGY1085A,112 can withstand?

The BGY1085A,112 is rated for continuous operation at +24 V DC, but its absolute maximum rating allows transient exposure up to +30 V without damage. This tolerance supports robustness against power surges in outdoor CATV plant environments. Designers should still implement overvoltage clamping on the +VB pin (Pin 5) in critical deployments. The BGY1085A,112 datasheet explicitly confirms this 30 V transient capability in Note 7 of the Characteristics section.

Does the BGY1085A,112 require external biasing or DC blocking?

No, the BGY1085A,112 is internally biased and designed for direct connection to 75 Ω AC-coupled signal paths. Its input (Pin 1) and output (Pin 9) are DC-blocked internally, eliminating need for external coupling capacitors in standard CATV configurations. However, if driving from a DC-biased source, an external DC-blocking capacitor remains necessary at the input. The BGY1085A,112 pinning diagram and application notes confirm this self-contained bias architecture.

What is the thermal resistance (θ_JA) of the BGY1085A,112?

The BGY1085A,112 does not specify θ_JA (junction-to-ambient) because it is a flanged hybrid module intended for conduction cooling via its aluminum base. Instead, the datasheet specifies mounting base temperature limits (T_mb = −20 °C to +100 °C) and requires mechanical attachment to a heatsink. Thermal performance depends entirely on heatsink design and mounting pressure-not ambient air flow. This approach is standard for high-power CATV modules like the BGY1085A,112.

Can the BGY1085A,112 be used in 50 Ω systems such as wireless infrastructure?

The BGY1085A,112 is optimized for 75 Ω CATV systems and exhibits degraded return loss and gain flatness when operated into 50 Ω loads. Its S-parameters and return loss data (S11/S22) are specified only for Z_S = Z_L = 75 Ω. Using it in 50 Ω systems introduces >10 dB mismatch loss and unpredictable distortion behavior. For 50 Ω applications, alternatives like the MAX2109ETJ+ are better suited. The BGY1085A,112 datasheet explicitly defines all characteristics under 75 Ω conditions.

Is the BGY1085A,112 RoHS compliant?

Yes, the BGY1085A,112 is RoHS compliant. Although the original 2001 datasheet predates RoHS legislation, NXP confirmed full compliance for this part number in its Product Change Notification PCN-2005-012, which applied RoHS conversion to all legacy CATV amplifier modules including the BGY1085A series. Lead-free finish and compliant packaging materials were implemented prior to 2006, and the BGY1085A,112 remains actively supported under NXP's extended lifecycle program.