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PDF LVDS Data sheet ( Hoja de datos )
| Número de pieza | LVDS | |
| Descripción | Owner Manual (Low-Voltage Differential Signaling) | |
| Fabricantes | National Semiconductor | |
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LVDS Owner’s Manual
Low-Voltage Differential Signaling
3rd Edition, Spring 2004
National
Semiconductor
The Sight & Sound of Information
1 page  
5 Page 
LVDS Owner’s Manual
1.3 LVDS ICs
A wide variety of LVDS Interface devices is available from a range of suppliers. LVDS is most commonly
found in the following types of ICs.
Line drivers/receivers
These devices are typically used to convert single-ended signals, such as LVCMOS into a format more suitable
for transmission over a backplane or a cable. They are available in single-channel as well as multi-channel
configurations.
SerDes
Serializer/deserializer pairs are used to multiplex a number of low-speed CMOS lines and to transmit them
as a single channel running at a higher data rate. SerDes ICs are typically used to reduce the number of
connector pins or lines within cables and backplanes. SerDes functions are being embedded into large and
complex ICs in order to reduce the number of I/Os on the IC package.
Switches
Switching architectures are favored over bus architectures when data-rates are high. As a consequence,
switches tend to operate at high data rates. LVDS is a common choice for the I/Os on these ICs. Switches
can be used for clock distribution. LVDS is one of the most suitable signaling standards for clocks of any
frequency because of reliable signal integrity.
1.4 Bus LVDS (BLVDS)
Bus LVDS, sometimes called BLVDS, is a new family of bus interface circuits based on LVDS technology,
specifically addressing multipoint cable or backplane applications. it differs from standard LVDS in providing
increased drive current to handle double terminations that are required in multipoint applications.
Bus LVDS addresses many of the challenges faced in a high-speed bus design.
• Bus LVDS eliminates the need for a special termination pull-up rail
• It eliminates the need for active termination devices
• Utilizes common power supply rails (3.3V or 5V)
• Employs a simple termination scheme
• Minimizes power dissipation in the interface devices
• Generates little noise
• Supports live insertion of cards
• Drives heavily loaded multi-point busses at 100’s of Mbps
The Bus LVDS products provide designers with new alternatives for solving high-speed, multi-point bus
interface problems. Bus LVDS has a wide application space ranging from telecom infrastructure and datacom
applications where card density demands high-performance backplanes to industrial applications where
long cable length and noise immunity are useful.
Refer to Chapter 5 for more details on Bus LVDS.
1-4 National Semiconductor’s LVDS Group
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet LVDS.PDF ] | |
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