Interface Selection Guide Texas Instruments 1Q 2009
LVDS, xECL, CML
Design Considerations
Signaling Rate — TI offers repeaters/
translators and crosspoint switches with
signaling rates up to 4.0 Gbps.
Jitter — Reducing jitter, the deviation of a
signal timing event from its ideal position,
has become a priority for ensuring
reliability in high-speed data buses.
Skew — Excessive skew, the time delta
between the actual and expected arrival
time of a clock signal, can limit the maxi-
mum bandwidth performance and lead
to data sampling errors. Low skew speci-
cations make high-speed interconnect
devices excellent for signal buffering.
Power Consumption — Low-voltage
differential signaling (LVDS) offers a
low-power alternative to ECL and PECL
devices. Current-mode drivers in LVDS
produce a constant current, which
allows power consumption to be
relatively independent of frequency.
The constant current driver delivers
about 3.5 mA to a 100-Ω load.
Technical Information
r-7%4JTCBTFEPOUIF5*"&*""
standard conceived to provide a general-
purpose electrical-layer specication
for drivers and receivers connected in a
point-to-point or multidrop interface.
Literature
Number Description
Application Notes
SLLA014A Low-Voltage Differential Signaling (LVDS) Design Notes (Rev. A)
SLLA030C Reducing Electromagnetic Interference with LVDS (Rev. C)
SLLA031A Using an LVDS Receiver with TIA/EIA-422 Data (Rev. A)
SLLA034A Slew Rate Control of LVDS Circuits (Rev. A)
SLLA038B Interface Circuits for TIA/EIA-644 (LVDS) (Rev. B)
SLLA053B Performance of LVDS with Different Cables (Rev. B)
SLLA054A LVDS Multidrop Connections (Rev. A)
SLLA065 A Comparison of LinBiCMOS and CMOS Process Technologies in LVDS ICs
SLLA082B Active Fail-Safe in TI's LVDS Receivers (Rev. B)
SLLA100 Increase Current Drive Using LVDS
SLLA101 Interfacing Different Logic with LVDS Receivers
SLLA103 LVPECL and LVDS Power Comparison
SLLA104 Suggestions for LVDS Connections
SLLA105 DSP to DSP Link Using LVDS
SLLA107 Live Insertion with Differential Interface Products
SLLA147 Suitable LVDS Architectures
Literature Number Description
Application Notes
SCAA059 AC-Coupling Between Differential LVPECL, LVDS, HSTL,
and CML
SCAA062 DC-Coupling Between Differential LVPECL, LVDS, HSTL,
and CML
Part Number Description Price*
Evaluation Modules (EVM)
SN65LVDS31-32EVM Evaluation Module for LVDS31 and LVDS32
49.00
SN65LVDS31-32BEVM Evaluation Module for LVDS31 and LVDS32B 49.00
SN65LVDS31-33EVM Evaluation Module for LVDS31 and LVDS33 49.00
SN65LVDS386EVM SN65LVDS386 Evaluation Module 49.00
SN65LVDS387EVM SN65LVDS387 Evaluation Module 49.00
SN65LVDS100EVM SN65LVDS100 Evaluation Module 49.00
SN65LVDS20EVM SN65LVDS20 Evaluation Module 99.00
SN65CML20EVM SN65CML20 Evaluation Module 49.00
SN65LVCP22-23EVM SN65LVCP22 Evaluation Module 25.00
SN65LVDS122EVM SN65LVDS122 Evaluation Module 49.00
SN65LVDS250EVM SN65LVDS250 Evaluation Module 49.00
Resources For a complete list of resources (evaluation modules, data sheets and application notes), visit interface.ti.com
Note: IBIS models are available at interface.ti.com
*Suggested resale price in U.S. dollars.
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