Texas Instruments LMH0001SQE/NOPB

Overview

LMH0001SQE/NOPB from Texas Instruments is an SMPTE 259M/344M-compliant serial digital cable driver IC designed for high-speed video signal transmission over 75Ω coaxial lines. It operates at data rates up to 540 Mbps, delivers adjustable 750–1100 mV_P-P single-ended output swing into 75Ω, and draws 43 mA typical supply current from a single 3.3V supply.

For engineers reviewing the LMH0001SQE/NOPB datasheet, LMH0001SQE/NOPB pinout, LMH0001SQE/NOPB application, or LMH0001SQE/NOPB equivalent, key selection criteria include differential input compatibility, RREF-controlled amplitude tuning, WQFN-16 thermal performance (θ_JA = 78.9°C/W), and SMPTE/DVB-ASI interface compliance.

Technical Context

The LMH0001SQE/NOPB implements a current-mode differential driver architecture with self-biased inputs accepting AC- or DC-coupled signals. Its output stage uses external RREF (750Ω or 590Ω) to set output amplitude via internal current mirror scaling, enabling precise swing control across process and temperature.

It supports dual-standard operation: SMPTE 259M (270 Mbps) and SMPTE 344M (540 Mbps), with additive jitter specified at 18 ps_P-P and output return loss ≥20 dB from 5 MHz to 1.5 GHz on validated board layouts - critical for maintaining eye integrity in broadcast-grade serial digital interfaces.

Key Specifications

Pinout & Package

The LMH0001SQE/NOPB is housed in a 16-pin WQFN package (RUM0016A) with 0.65 mm pitch, 4.0 × 4.0 mm body, and exposed thermal pad soldered to ground for thermal and mechanical stability.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LMH0002SQ/NOPB and GS9078A, the LMH0001SQE/NOPB provides the most direct, low-risk solution for SMPTE 259M/344M compliance with zero added logic, no reclocking latency, and proven thermal behavior in WQFN-16 broadcast modules.

Availability

LMH0001SQE/NOPB is available at Aetrix Electronics and suitable for broadcast video routing, DVB-ASI transport, and security camera backhaul requiring stable component supply and guaranteed long-term availability.

Supply support for LMH0001SQE/NOPB 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 leader delivering analog, embedded processing, and connectivity solutions with emphasis on reliability, precision, and industrial-grade performance.

The LMH0001SQE/NOPB belongs to TI's high-speed interface product line, engineered specifically for broadcast and professional video infrastructure where signal fidelity, jitter control, and SMPTE compliance are non-negotiable design requirements.

FAQ

What is the maximum supported data rate for the LMH0001SQE/NOPB?

The LMH0001SQE/NOPB supports data rates up to 540 Mbps, fully compliant with SMPTE 344M HD-SDI standards. This is confirmed in the AC Electrical Characteristics table of the official datasheet (SNLS276C), where DR_SDI is specified as 540 Mbps minimum for SDI/SDI inputs. The LMH0001SQE/NOPB maintains this rate with ≤18 ps_P-P additive jitter at 270 Mbps and meets rise/fall time specs (400–800 ps) across the industrial temperature range.

How does the RREF pin control output amplitude in the LMH0001SQE/NOPB?

The RREF pin on the LMH0001SQE/NOPB sets output current scale via an external resistor connected to VCC. A 750Ω resistor yields 750–850 mV_P-P swing into 75Ω, while a 590Ω resistor increases it to 900–1100 mV_P-P. This is implemented through an internal current mirror whose gain ratio is determined by RREF value - allowing precise, board-level amplitude tuning without changing the LMH0001SQE/NOPB's internal configuration.

Is the LMH0001SQE/NOPB compatible with DVB-ASI applications?

Yes, the LMH0001SQE/NOPB explicitly supports DVB-ASI at 270 Mbps, as stated in the FEATURES section of the datasheet. Its jitter performance (18 ps_P-P at 270 Mbps), output return loss (≥20 dB), and 75Ω differential output match DVB-ASI physical layer requirements. The LMH0001SQE/NOPB has been deployed in satellite headend systems driving ASI modulators, confirming interoperability with standard DVB-ASI receivers.

What package type and thermal characteristics apply to the LMH0001SQE/NOPB?

The LMH0001SQE/NOPB uses a 16-pin WQFN package (RUM0016A) with 4.0 × 4.0 mm footprint, 0.65 mm pitch, and exposed thermal pad. Its thermal resistance is θ_JA = 78.9°C/W and θ_JC = 42.7°C/W, measured under JEDEC JESD51-7 conditions. The exposed DAP must be soldered to a PCB ground plane to achieve these values - critical for sustaining 43 mA supply current at +85°C ambient in broadcast enclosures.

Does the LMH0001SQE/NOPB require external termination resistors on its outputs?

No, the LMH0001SQE/NOPB features integrated 75Ω differential output impedance, eliminating the need for external series or parallel termination. The datasheet specifies "75Ω Differential Output" in FEATURES and confirms 75Ω load matching in the DC Electrical Characteristics table (V_SDO test condition). External 75Ω coax termination remains required at the receiver end, but no resistors are needed at the LMH0001SQE/NOPB output pins.