描述 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 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.

特性 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- Line Drivers for Data Rates1 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
1The data rate of a line, is the number of voltage transitions that are made per second expressed in the units bps (bits per second). AdvancedTCA and ATCA are trademarks of the PCI Industrial Computer Manufacturers Group.