Cable driver for serial digital video
The LMH0303SQE/NOPB is a single-channel cable driver from Texas Instruments, designed to drive 75-ohm coaxial cable for serial digital video signals. It supports both DVB-ASI and SMPTE standards, making it a direct fit for broadcast and professional video infrastructure like production switchers, routers, and distribution amplifiers. The part operates from a tightly regulated 3.13V to 3.46V supply rail, which is typical for the PLL and output stage in SDI drivers. The serial control interface allows for output slew rate adjustment and cable length equalization settings without external components.
Package and layout considerations
Housed in a 16-WQFN with an exposed pad (4x4 mm body), the LMH0303SQE/NOPB requires a thermal land pattern on the PCB to sink heat from the output stage. The exposed paddle must be soldered to a ground plane with adequate thermal vias to keep the junction temperature within limits during continuous 270 Mbps or 1.485 Gbps operation. The surface-mount package is compatible with standard reflow profiles. Tape & Reel (TR) and Cut Tape (CT) options are available for both production and prototyping volumes.
Lifecycle and compliance
The device is ROHS3 Compliant, meeting the latest EU directive for lead-free and restricted-substance materials. No additional compliance documentation beyond the standard TI declaration is required for most markets.