1 Features
1• Supports ST-2082-1 (12G), ST-2081-1 (6G), ST-
424 (3G), ST-292 (HD), and ST-259 (SD)
• Compatible with DVB-ASI and AES10 (MADI)
• Dual differential output cable drivers
• On-chip 75-Ω termination and return loss
compensation network
• Host-side equalized 100-Ω loop-back output
• Programmable slew rate control on 75-Ω outputs
• Programmable pre-emphasis and output
amplitude on 75-Ω outputs
• Programmable de-emphasis and output amplitude
on 100-Ω output
• Polarity inversion on 75-Ω and 100-Ω outputs
• Automatic power save in absence of input signal
– Power consumption: 25 mW (Typical)
• Power-down control through ENABLE pin
• Single 2.5-V supply
– Power consumption: 200 mW (typical)
• Programmable through pins, SPI, or SMBus
interface
• –40°C to +85°C operating temperature range
• 5-mm × 5-mm, 32-pin WQFN package

2 Applications
• SMPTE compatible serial digital interface
• UHDTV/4K/8K/HDTV/SDTV video
• IP media gateway
• Digital video processing and editing

3 Description
LMH1208 device is a 12G UHD-SDI low power dual
output cable driver. It supports SMPTE video rates up
to 11.88 Gbps, enabling UHD video for 4K/8K
applications. The additional equalized 100-Ω driver
output on the host-side can be used for monitoring or
signal distribution purposes.
The programmable PCB input equalizer provides high
frequency boost to reduce inter symbol interference
(ISI) induced by PCB board trace. The integrated 75-
Ω termination and return loss network at both cable
driver outputs facilitate overall system design in
meeting stringent SMPTE return loss requirements.
Input Signal Detect determines the presence of a
valid signal at the input of the cable driver. This
sensing feature may be used to alert the user of a
system fault and activate a Power Save Mode,
reducing the power consumption of the cable driver.
The LMH1208 provides selectable slew rates for data
rates up to 11.88 Gbps. The output slew rate and
amplitude can be controlled by pin, SPI, or SMBus
control.
The LMH1208 is powered from a single 2.5-V supply.
It is offered in a small footprint 5 mm × 5 mm 32-pin
WQFN package. The LMH1208 is pin compatible with
the LMH1228 (12G Dual Cable Driver with Integrated
Reclocker).