NXP Semiconductors MHW8247AN

Overview

MHW8247AN from Freescale Semiconductor is a GaAs-based CATV forward power doubler amplifier module operating from 47 to 870 MHz, delivering 24.9 dB typical gain at 870 MHz, +48 dBmV/channel output capability under 112-channel flat loading, and –64 dBc typical CSO distortion. It serves as the RF output stage in optical nodes and trunk amplifiers for broadband cable distribution systems.

For engineers reviewing the MHW8247AN datasheet, MHW8247AN pinout, MHW8247AN application, or MHW8247AN equivalent, key selection criteria include its 24 Vdc operation, 420–460 mA supply current, unconditional stability across all load conditions, and RoHS-compliant Case 1302-01 Style 1 package with defined RF input/output terminals and ground layout.

Technical Context

The MHW8247AN implements a two-stage GaAs FET power doubler architecture optimized for linear CATV signal amplification in 75 Ω systems. It operates with fixed 24 Vdc bias and delivers flat gain response (≤0.7 dB peak-to-valley) across 40–870 MHz while maintaining ≥16 dB return loss at both input and output ports over the full band.

Its distortion performance is specified under multiple channel-loading configurations-112-channel flat, 79-channel flat, and 12 dB tilt variants-with CSO, CTB, and XMD measured at defined output levels (+48 to +58 dBmV/ch). Built-in input diode protection and output ring wave suppression support robust field deployment in active HFC infrastructure.

Key Specifications

Pinout & Package

Package: Case 1302-01, Style 1 - hermetically sealed metal-ceramic module with integrated heat slug, designed for surface-mount soldering and chassis-ground thermal coupling.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MHW8247A, the MHW8247AN offers identical performance with RoHS compliance; compared with ERA-5SM+, it provides 75 Ω-optimized linearity, higher gain, and validated CATV distortion metrics-making it uniquely suited for production cable infrastructure.

Availability

MHW8247AN is available at Aetrix Electronics and suitable for optical node output stages, trunk distribution amplifiers, and line extender drivers requiring stable component supply in legacy and extended-life CATV infrastructure programs.

Supply support for MHW8247AN 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

Freescale Semiconductor was a U.S.-based semiconductor company specializing in RF, microcontroller, and analog solutions before its acquisition by NXP in 2015; its CATV portfolio remains widely deployed in global broadband networks.

The MHW8247AN belongs to Freescale's GaAs CATV amplifier module product line, engineered specifically for high-output, low-distortion RF amplification in 75 Ω HFC distribution systems operating up to 870 MHz.

FAQ

What is the recommended DC supply voltage for stable operation of the MHW8247AN?

The MHW8247AN is specified for 24 Vdc nominal operation, with absolute maximum rating of +28 Vdc. Operating at 24 Vdc ensures optimal gain, linearity, and thermal performance per datasheet conditions (TC = +45°C). Deviation beyond ±5% may affect CSO/CTB distortion and output power consistency. The MHW8247AN must be decoupled with 10 µF and 0.1 µF capacitors at Pin 5 to suppress supply noise.

Does the MHW8247AN require external matching components for 75 Ω system integration?

No, the MHW8247AN features internally matched 75 Ω input and output ports across 47–870 MHz, as verified by ≥16 dB return loss in all specified bands. External matching is unnecessary for standard CATV applications. However, PCB layout must maintain controlled 75 Ω microstrip traces and minimize stub length at Pins 1 and 9 to preserve return loss performance. The MHW8247AN's integrated matching eliminates discrete baluns or transformers required by many discrete GaAs FET solutions.

How does the MHW8247AN handle transient overvoltage events on the RF input?

The MHW8247AN incorporates built-in input diode protection rated to withstand +70 dBmV single-tone RF surges and 300 V surge per IEC 1000-4-5. This protects the first GaAs FET stage from lightning-induced transients on coaxial drop cables. The protection circuit clamps without latch-up and recovers automatically. For sustained overvoltage conditions exceeding ratings, external gas discharge tubes remain recommended upstream-but the MHW8247AN's internal protection significantly reduces failure rates in field-deployed optical nodes.

Is the MHW8247AN pin-compatible with earlier Freescale CATV modules like the MHW8246 series?

No, the MHW8247AN uses Case 1302-01 Style 1 packaging with nine terminals (including four grounds), whereas the MHW8246 series uses different case outlines and pin assignments. Pin compatibility is confirmed only with its direct predecessor MHW8247A, which shares identical footprint, terminal numbering, and mechanical dimensions. Substituting MHW8247AN for MHW8246-series modules would require PCB redesign due to incompatible land patterns and signal routing.

What thermal management guidance applies to the MHW8247AN in continuous operation?

The MHW8247AN operates over –20°C to +100°C case temperature and dissipates ~10.6 W (24 V × 440 mA). Its metal-ceramic Case 1302-01 package requires direct thermal coupling to a heatsink via the bottom slug. Freescale recommends minimum 25 cm² copper pour with thermal vias under the module, plus forced airflow or chassis mounting for ambient temperatures above +60°C. Derating is required above TC = +85°C; the MHW8247AN's performance specifications are guaranteed only within the stated thermal envelope.