NXP Semiconductors MHW1345N

Overview

MHW1345N from Freescale Semiconductor is a 10–200 MHz general-purpose linear RF amplifier module in Class A operation, delivering 34.5 dB typical gain at 100 MHz, +44 dBm typical third-order intercept (ITO), and 800 mW P1dB output power at 24 Vdc - used as a driver amplifier in 50 Ω CATV return-path systems.

For engineers reviewing the MHW1345N datasheet, MHW1345N pinout, MHW1345N application, or MHW1345N equivalent, key selection criteria include broadband gain flatness (±0.5 dB typ), unconditional stability across all load conditions, noise figure (3.8 dB typ at 200 MHz), and RoHS-compliant Case 1302-01 package compatibility with legacy MHW1345 designs.

Technical Context

The MHW1345N is a silicon bipolar monolithic amplifier module optimized for linear operation in 50 Ω systems. It operates unconditionally stable over 10–200 MHz with fixed 24 Vdc bias and delivers high linearity via Class A topology, evidenced by −60 dBc second-harmonic distortion at 100 mW output and −32 dBc two-tone IMD performance.

Its S-parameter data confirms broadband matching: S11 ≤ −11.1 dB and S22 ≤ −10.8 dB across 10–200 MHz, supporting wideband driver applications without external tuning. The module requires no external bias network beyond 0.01 μF input/output DC blocking capacitors and a single 24 V supply rail.

Key Specifications

Pinout & Package

Package: Case 1302-01, Style 1 - hermetically sealed metal-ceramic module with 9-terminal layout, designed for surface-mount or chassis-mount RF applications requiring thermal stability and EMI shielding.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CA2830C and MHW1345, the MHW1345N provides superior low-end bandwidth (down to 10 MHz), tighter gain flatness, and guaranteed RoHS compliance - making it the preferred choice for new CATV infrastructure and instrumentation designs requiring full 10–200 MHz linearity.

Availability

MHW1345N is available at Aetrix Electronics and suitable for CATV return-path amplifiers, RF instrumentation drivers, and 50 Ω broadband system upgrades requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.

Supply support for MHW1345N 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 leading designer of analog, RF, and mixed-signal semiconductors, acquired by NXP in 2015; its RF amplifier portfolio remains widely deployed in broadband infrastructure.

The MHW1345N belongs to Freescale's General Purpose Linear Amplifier Module product line, engineered specifically for high-linearity, wideband RF driver applications in CATV, test equipment, and communication systems operating from 10 MHz to 200 MHz.

FAQ

What is the maximum supply voltage rating for the MHW1345N?

The MHW1345N has a maximum DC supply voltage rating of 28 Vdc, as specified in its Absolute Maximum Ratings table. Operating at 24 Vdc is standard, but brief transients up to 28 Vdc are permissible. Exceeding this voltage risks permanent damage to the internal bipolar transistor structure. Always verify input ripple and transient suppression in the 24 V supply rail when deploying the MHW1345N in production systems.

Does the MHW1345N require external bias circuitry or tuning components?

No, the MHW1345N does not require external bias circuitry or tuning components. It is internally biased for Class A operation at 24 Vdc and features broadband 50 Ω input/output matching. Only two 0.01 μF DC-blocking capacitors are required - one at the RF input (Pin 1) and one at the RF output (Pin 9). No RF chokes, resistors, or matching networks are needed per the manufacturer's recommended external connections.

Is the MHW1345N pin-compatible with the older MHW1345?

Yes, the MHW1345N is fully pin-compatible with the MHW1345. The datasheet explicitly states "There are no form, fit or function changes with this part replacement." Both use identical Case 1302-01, Style 1 packaging, same 9-pin layout, and identical terminal functions - including deleted Pins 4 and 6. This allows direct substitution without PCB modification or firmware updates.

What is the typical noise figure of the MHW1345N and at what frequency is it specified?

The typical noise figure of the MHW1345N is 3.8 dB, measured at 200 MHz under standard test conditions (T_C = 25°C, V_CC = 24 V, 50 Ω system). This value appears in Table 2 of the official Freescale datasheet as the "Noise Figure, Broadband" parameter. It reflects the device's ability to amplify weak signals while adding minimal thermal noise - critical when cascading multiple amplifier stages in sensitive receiver paths.

Can the MHW1345N be operated at 28 Vdc to increase output power?

Yes, the MHW1345N can be operated at 28 Vdc to increase output power: its P1dB rises from 800 mW (at 24 V) to 1260 mW (typ) at 28 V, as documented in Table 2. However, supply current increases to ~330 mA and thermal management becomes more critical. Derating and heatsinking must be verified per application ambient conditions, and operation above 24 V should only occur if the system design accommodates higher power dissipation and voltage tolerance.