NXP Semiconductors CGY887A,112

Overview

CGY887A,112 from NXP Semiconductors is a hybrid push-pull RF amplifier module designed for CATV distribution systems, delivering 25.5 dB small-signal power gain at 860 MHz, operating from a 24 V DC supply, with 40–870 MHz bandwidth and 75 Ω input/output impedance.

For engineers reviewing the CGY887A,112 datasheet, CGY887A,112 pinout, CGY887A,112 application, or CGY887A,112 equivalent, key selection criteria include flat frequency response (±0.5 dB), low composite distortion (CTB ≤ –62 dB), high input return loss (>17 dB up to 870 MHz), and rugged SOT115J package with gold metallization for reliability in headend and node amplifiers.

Technical Context

The CGY887A,112 employs a GaAs/Si hybrid die architecture in a single-ended, flanged metal package, configured as a broadband push-pull amplifier to suppress even-order harmonics and improve linearity. It operates with fixed 24 V bias and requires no external bias network or stabilization components.

Its 75 Ω matched design targets CATV infrastructure where impedance continuity, low noise figure (≤5.5 dB), and distortion performance (CSO ≤ –59 dB, Xmod ≤ –56 dB) are critical for multi-channel analog/digital signal integrity across the full 40–870 MHz band.

Key Specifications

Pinout & Package

SOT115J: Rectangular single-ended aluminum flange package with 7 gold-plated in-line leads, 2 vertical 6-32 UNC mounting holes, and thermal base for direct heatsink attachment.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CGY887A,112, the CGY887B,112 offers higher gain and lower distortion at slightly increased current, while the CGY886A,112 trades 2 dB gain for 40 mA lower consumption-enabling different thermal and cascade design trade-offs in CATV RF paths.

Availability

CGY887A,112 is available at Aetrix Electronics and suitable for CATV trunk amplifiers, HFC node designs, two-way RF distribution systems, and legacy analog video infrastructure requiring stable component supply and long-lifecycle support.

Supply support for CGY887A,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 specializing in high-performance RF, analog, and mixed-signal solutions for communications, automotive, and industrial markets.

The CGY887A,112 belongs to NXP's legacy CATV amplifier product line, engineered specifically for broadband cable infrastructure where linearity, gain stability, and rugged packaging are essential for field-deployed RF modules.

FAQ

What is the recommended DC supply voltage for CGY887A,112?

The CGY887A,112 is specified for operation at 24 V DC, with absolute maximum rating of 30 V for transient conditions. Its internal biasing is fixed, requiring no external resistors or regulators. Stable 24 V operation ensures nominal 25.5 dB gain and optimal distortion performance; deviation below 22 V or above 26 V degrades CTB and gain flatness per the Quick Reference Data table in the datasheet. The CGY887A,112 must be used with adequate decoupling capacitors near pin 5 (+VB) to suppress supply noise.

Does CGY887A,112 require external matching components?

No, the CGY887A,112 features fully 75 Ω matched input and output ports, eliminating the need for external matching networks in standard CATV applications. Its s11 and s22 return loss exceeds 17 dB across 40–870 MHz, confirming intrinsic impedance alignment. External components are only required if interfacing with non-75 Ω systems or adding filtering; in typical trunk/node designs, the CGY887A,112 connects directly between 75 Ω traces or coaxial connectors. This simplifies layout and improves repeatability versus discrete-matched alternatives.

What thermal management is required for CGY887A,112?

The CGY887A,112 uses an aluminum flange (SOT115J) designed for direct mechanical and thermal attachment to a heatsink. With ≤240 mA total current at 24 V, it dissipates up to 5.76 W; junction temperature must remain ≤100 °C. Mounting requires conductive thermal interface material and torque-controlled screws (6-32 UNC) to ensure low thermal resistance. Ambient case temperature must not exceed +100 °C, and airflow or heatsink fin area should be sized per NXP's AN10327 thermal guidelines. Failure to secure the flange risks thermal runaway and permanent gain shift in the CGY887A,112.

Is CGY887A,112 suitable for DOCSIS 4.0 deployments?

Yes, the CGY887A,112 supports DOCSIS 4.0 downstream channel plans with verified performance up to 870 MHz, including CTB ≤ –62 dB and CSO ≤ –59 dB under 129-channel flat conditions. Its 25.5 dB gain and ±0.5 dB flatness maintain signal integrity across extended spectrum usage. However, DOCSIS 4.0 upstream aggregation may require additional filtering due to the CGY887A,112's primary downstream optimization; system-level validation with real-world QAM256/1024 modulation and OFDMA loading is recommended before full deployment.

What is the meaning of "push-pull" in CGY887A,112's description?

In the CGY887A,112, "push-pull" refers to its internal amplifier topology using two complementary active devices driven 180° out of phase to cancel even-order harmonics and improve linearity. This architecture directly enables its low CSO (–59 dB) and Xmod (–56 dB) performance-critical for multi-channel CATV. Unlike single-ended amplifiers, the push-pull configuration reduces second-harmonic generation and allows higher output swing before clipping, making the CGY887A,112 especially effective in dense channel environments where distortion products fall within the passband.