Texas Instruments LMH0002MAX

Overview

LMH0002MAX from Texas Instruments is an SMPTE 292M/259M-compliant serial digital cable driver IC with differential input, 75Ω differential output, selectable slew rate (SD/HD pin), and adjustable output amplitude via RREF resistor. It operates from a single 3.3V supply, supports data rates up to 1.485 Gbps, and delivers 800 mV_P–P into 75Ω in SD mode - used in broadcast video routing, HD-SDI distribution amplifiers, and digital video infrastructure.

For engineers reviewing the LMH0002MAX datasheet, LMH0002MAX pinout, LMH0002MAX application, or LMH0002MAX equivalent, key selection criteria include SMPTE compliance mode control, RREF-based amplitude tuning, thermal performance in SOIC package (θ_JA = 160°C/W), and industrial temperature range (−40°C to +85°C) for rugged video systems.

Technical Context

The LMH0002MAX implements a current-mode differential output stage with programmable slew rate via the SD/HD pin: low = SMPTE 292M (fast rise/fall, 120–220 ps), high = SMPTE 259M (slower, 400–800 ps). Input common-mode voltage is self-biased at ~2.1 V with V_CC = 3.3 V, supporting both AC- and DC-coupled differential inputs.

Output amplitude is set by external R_REF (750 Ω typical for 800 mV_P–P, 590 Ω for 1000 mV_P–P) connected between RREF and V_CC. Power consumption is 49 mA typical in SD mode and 43 mA in HD mode, with additive jitter ≤26 ps_P–P at 1.485 Gbps.

Key Specifications

Pinout & Package

LMH0002MAX is housed in an 8-pin SOIC (Package Drawing D), 1.75 mm max height, RoHS-compliant, green finish, moisture sensitivity level 1. Pin 1 marked with ID area; exposed pad not present.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar serial digital cable driver applications.

Compared with LMH0002TMAX/NOPB, LMH0002MAX/NOPB offers identical performance and qualification but distinct device marking and tape-and-reel packaging (2500 vs. 2500 units); versus LMH0002SQ/NOPB, it trades higher thermal resistance for proven SOIC manufacturability and drop-in replacement capability in existing HD-SDI designs.

Availability

LMH0002MAX is available at Aetrix Electronics and suitable for HD-SDI video routing, SD-SDI distribution amplifiers, and DVB-ASI transport interfaces requiring stable component supply, long-term industrial temperature support, and SMPTE compliance assurance.

Supply support for LMH0002MAX 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

Texas Instruments is a global semiconductor company delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and communications markets.

The LMH0002MAX belongs to TI's high-speed interface portfolio, designed specifically for broadcast video infrastructure requiring SMPTE 259M/292M/344M compliance, low-jitter cable driving, and robust coaxial transmission.

FAQ

What is the operating temperature range of the LMH0002MAX?

The LMH0002MAX is rated for industrial operation from −40°C to +85°C. This specification is confirmed in the Recommended Operating Conditions table of the SNLS215E datasheet and applies to the LMH0002MAX/NOPB ordering variant. The device maintains full SMPTE 292M/259M compliance and jitter performance across this entire range, making it suitable for broadcast equipment deployed in uncontrolled environments. LMH0002MAX uses the same die as LMH0002TMA and shares identical thermal and electrical characterization.

How does the SD/HD pin affect LMH0002MAX output timing?

The SD/HD pin on the LMH0002MAX directly controls output slew rate: when pulled low, it configures the driver for SMPTE 292M compliance with fast rise/fall times (120–220 ps); when high, it selects SMPTE 259M mode with slower transitions (400–800 ps). This pin is TTL-compatible and requires no external pull-up/down resistors. The setting determines whether the LMH0002MAX meets the stricter timing masks for HD-SDI (1.485 Gbps) or SD-SDI (270 Mbps) applications - a hardware-selectable feature that avoids firmware overhead.

What value of RREF resistor should I use for 800 mVP–P output on LMH0002MAX?

For 800 mV_P–P differential output swing into a 75 Ω load, the LMH0002MAX requires a 750 Ω ±1% resistor connected between the RREF pin and V_CC. This value is explicitly specified in the DC Electrical Characteristics table (V_SDO = 750–850 mV_P–P at R_REF = 750 Ω). The resistor must be placed adjacent to the RREF pin with minimal trace length, and underlying copper should be removed to reduce parasitic capacitance - per TI's Application Information section.

Is LMH0002MAX pin-compatible with Gennum GS1528A?

No - LMH0002MAX is not pin-compatible with Gennum GS1528A. According to the LMH0002 datasheet, only the LMH0002MA (commercial temp) is form-fit-function compatible with GS1528/GS1528A, while LMH0002SQ matches GS1578A. LMH0002MAX is an industrial-grade SOIC variant with different pinout (e.g., NC pins omitted) and internal biasing. Direct replacement would require PCB redesign; migration requires validation of SD/HD control logic and RREF network placement.

What is the maximum additive jitter specification for LMH0002MAX at 1.485 Gbps?

The LMH0002MAX has a maximum additive jitter of 26 ps_P–P at 1.485 Gbps, as specified in the AC Electrical Characteristics table under parameter t_jit. This value is measured differentially at the SDO/SDO outputs with proper termination and reflects deterministic jitter added by the driver itself - excluding source jitter. It is verified by characterization and test per JEDEC standards, and enables compliance with SMPTE RP184 eye diagram requirements for HD-SDI transmission over 100+ meters of coaxial cable.