FEATURES
· LVTTL Receiver and Eight Line Drivers
Configured as an 8-Port M-LVDS Repeater –
SN65MLVD128
· 2 LVTTL Receivers and Eight Line Drivers
Configured as Dual 4-Port M-LVDS Repeaters
– SN65MLVD129
· Drivers Meet or Exceed the M-LVDS Standard
(TIA/EIA-899)
· Low-Voltage Differential 30-W to 55-W Line
Drivers for Data Rates (1) Up to 250 Mbps or
Clock Frequencies Up to 125 MHz
· Power Up/Down Glitch Free
· Controlled Driver Output Voltage Transition
Times for Improved Signal Quality
Bus Pins High Impedance When Disabled or
VCC £ 1.5 V
Independent Enables for each Driver
Output-to-Ouput Skew tsk(o) £ 160 ps
Part-to-Part Skew tsk(pp) £ 800 ps
Single 3.3-V Voltage Supply
Bus Pin ESD Protection Exceeds 9 kV
Packaged in 48-Pin TSSOP (DGG)

APPLICATIONS
AdvancedTCA™ (ATCA™) Clock Bus Driver
Clock Distribution
Data and Clock Repeating Over Backplanes
and Cables
Cellular Base Stations
Central Office Switches
Network Switches and Routers

DESCRIPTION
The SN65MLVD128 and SN65MLVD129 are LVTTL-to-M-LVDS translators/repeaters. Outputs comply with the
M-LVDS standard (TIA/EIA-899) and are optimized for data rates up to 250 Mbps, and clock frequencies up to
125 MHz. The driver outputs have been designed to support multipoint buses presenting loads as low as 30 W
and incorporates controlled transition times for backbone operation.
M-LVDS compliant devices allow for 32 nodes on a common bus, providing a high-speed replacement for
RS-485 devices when lower common-mode voltage range and lower output signaling levels are acceptable. The
SN65MLVD128 and SN65MLVD129 provide separate driver enables, allowing for independent control of each
output signal.
Intended applications for these devices include transmission of clock signals from a central clock module, as well
as translation and buffering of data or control signals for transmission through a controlled impedance backplane
or cable.