What the LMH0002SQ drives and where it fits
The LMH0002SQ is a single-channel serial digital cable driver from Texas Instruments, designed to drive 75-ohm coaxial cable for broadcast video transport. It supports both DVB-ASI and SMPTE standards, making it the output stage for professional video encoding, distribution amplifiers, and test equipment in consumer video applications. The supply range is 3.135V to 3.465V — a tight 3.3V nominal rail — so the board's local 3.3V regulator must stay within 5 % tolerance under load to keep the driver's output amplitude within the SMPTE eye-mask limits.
Package, footprint, and mounting
Housed in a 16-WQFN with an exposed thermal pad (4x4 mm body), the LMH0002SQ requires a surface-mount reflow profile consistent with JEDEC MSL level for QFN packages. The exposed pad must be soldered to a PCB ground plane with adequate thermal vias to keep the junction temperature below the datasheet maximum during continuous 75-ohm drive. The Supplier Device Package designation is 16-WQFN (4x4) — confirm the PCB land pattern matches the TI recommended footprint for this package code, particularly the pad-to-pin spacing under the QFN edge.
Lifecycle and compliance note
RoHS non-compliant per the manufacturer's declaration. If your BOM requires RoHS 10/10 compliance, a Pb-free variant or a functionally equivalent driver from the same family should be verified against the SMPTE timing specs.