LMH0303 Datasheet | National Semiconductor

Description The LMH0303 3 Gbps HD/SD SDI Cable Driver with Cable Detect is designed for use in SMPTE 424M, SMPTE 292M, SMPTE 344M, and SMPTE 259M serial digital video applications. The LMH0303 drives 75Ω transmission lines (Belden 1694A, Belden 8281, or equivalent) at data rates up to 2.97 Gbps. The LMH0303 includes intelligent sensing capabilities to improve system diagnostics. The cable detect feature senses near-end termination to determine if a cable is correctly attached to the output BNC. Input loss of signal (LOS) detects the presence of a valid signal at the input of the cable driver. These sensing features may be used to alert the user of a system fault and activate a deep power save mode, reducing the cable driver's power consumption to 3 m W. These features are accessible via an SMBus interface. The LMH0303 provides two selectable slew rates for SMPTE 259M and SMPTE 424M / 292M pliance. The output amplitude is adjustable ±10% in 5 m V steps via the SMBus. The LMH0303 is powered from a single 3.3V supply. Power consumption is typically 130 m W in SD mode and 155 m W in HD mode. The LMH0303 is available in a 16-pin LLP package. The LMH0303 interfaces with National's LMH0356 for additional system control and power consumption savings (see Typical Application). Features - SMPTE 424M, SMPTE 292M, SMPTE 344M, and SMPTE 259M pliant Data rates to 2.97 Gbps Cable detect on output Loss of signal detect at input Output driver power down control Typical power consumption: 130 m W in SD mode and 155 m W in HD mode - Power save mode typical power consumption: 4 m W - Single 3.3V supply operation - Differential input - - - - - - - - - - 75Ω differential output Selectable slew rate Industrial temperature range: - 40°C to +85°C 16- pin LLP package Footprint patible with the LMH0302 Applications - SMPTE 424M, SMPTE 292M, SMPTE 344M, and SMPTE 259M serial digital interfaces - Digital video routers and switches - Distribution amplifiers Typical Application © 2008...