LVDS Interface Circuit
TIA/EIA-899 Electrical Characteristics of Multipoint Low Voltage Differential Signaling (M-LVDS) Interface Circuits for Multipoint Data Interchange
[EIA899 Description]
[LVDS ICs] [Standard
Organizations ] [Connectors ]
[PECL to LVDS Conversion]
[LVPECL to LVDS Conversion]
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M-LVDS Multipoint LVDS [EIA-899], Addresses double terminated bus
configurations extends the common-mode range to +/-2 V. 11mA drive
at 500Mbps max, 200/300Mbps typical for Multi-pointEIA/TIA-644 Balanced (differential) interface [LVDS]; defines the
Electrical layer (Receiver and Transmitter) only.
Designed with an output voltage swing of 350mV at better then 400Mbps
into a 100 ohm load, across a distance of about 10 meters. LVDS is only
an Electrical spec - to be referenced by other specifications, it may be
used with either a cable or PWB design. The type of cable determines
cable length; Category 3 (CAT3) for 10m in length, CAT5 for longer runs
(~20 meters @ 100Mbps, ~50 meters @ 50Mbps, ~100 meters @ 10Mbps). Ribbon
cable may be used for sub meter runs. Also listed under IEEE
1596.3.
Other vendor types:
LVDS [EIA-644], Low Voltage Differential Signaling; 3.5mA drive,
at 655Mbps max, Point-to-Point
BLVDS Bus LVDS, [Proprietary] 10mA drive designed to handle
mulit-card low impedance backplane applications [One bus driver].
GLVDS Ground referenced LVDS, Places the driver output voltage
offset closer to ground potential.
LVDM Low Voltage Differential Signaling Multi-Point,
[Proprietary], 8mA with one bus driver.
LVDS Owner's Manual and Design Guide {National Semiconductor}
For detailed LVDS design information see this LVDS Design Data page.
LVDS uses a single 100 ohm termination resistor at the
Receiver side of the bus. The Receiver provides failsafe bias so
Pull-up/down resistors are not required. Noisy
environments may require the addition of bias resistors.
The Pullup/Down
Resistors (Idle-line failsafe) are used to keep the +/- inputs of the
Receiver(s) inputs at a minimum of 200mV differential or higher. Normally
required once the system has reached it's quiescent state, when no
drivers are driving the bus. Only one end of the bus requires the
resistor network.
Aeroflex UTMC {RAD hard IC Manufacturer}
Fairchild Semiconductor Corp. {Differential LVDS Repeater ICs}
Maxim Integrated Products, Inc.
National Semiconductor {Differential Bus Transceiver ICs- Receiver ICs -Driver ICs-SERDES Devices}
NXP {Clock Driver ICs}
ON Semiconductor {Clock Driver ICs}
Pericom Semiconductor Corporation {LVDS Drivers/Receivers/Crosspoint/Repeaters/Distribution IC Manufacturer}
STMicroelectronics {Differential Bus Transceiver ICs-Receiver- Clock Driver ICs}
Texas Instruments 'TI' {RS-644 Differential Driver/Receiver-8 bit Registered Transceiver ICs/SERDES Devices}
IC Manufacturers {All other device types}
Recall that EIA/TIA-644 does not define the connectors, so this list should be used as a guide.
Amphenol {LVDS Connector Manufacturer}
Methode Electronics {LVDS Connector Manufacturer}
Molex {LVDS Connector Manufacturer}
Electronic Industries Alliance {EIA}
Telecommunications Industry
Association {TIA}
TIA/EIA-899: Electrical Characteristics of Multipoint Low Voltage Differential Signaling (M-LVDS) Interface Circuits for Multipoint Data Interchange
ANSI/TIA/EIA-644: Electrical Characteristics of Low Voltage Differential Signaling (LVDS) Interface Circuits
Other specifications which use LVDS as the electrical interface
include:
SATA, RapidIO, HyperTransport, and InfiniBand.
Engineering Design Key words: IEEE-899, IEEE899, LVDS, RS-644, IEEE644, EIA644, Low Voltage Differential Signaling, Electrical layer, Multi-Drop, M-LVDS, MLVDS, Standard, differential Balanced interface, Interface Standard Data Bus, Standard, Specification, Spec, Interface, IC, Integrated Circuits, Device, Physical Interface, EIA-644, Description, Personal Computer, PC, Local Bus
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