DS91D180 Datasheet, PDF (1/13 Pages) National Semiconductor (TI) – Multipoint LVDS (M-LVDS) Line Driver/Receiver

June 2006
DS91D180/DS91C180
Multipoint LVDS (M-LVDS) Line Driver/Receiver
General Description
The DS91D180 and DS91C180 are high-speed differential
M-LVDS single drivers/receivers designed for multipoint ap-
plications with multiple drivers or receivers. Multipoint LVDS
(M-LVDS) is a new bus interface standard (TIA/EIA-899)
based on LVDS but including several enhancements to im-
prove multipoint performance. M-LVDS devices have supe-
rior drive capability and can support up to 32 loads. Along
with increased drive, M-LVDS devices are required to have a
controlled edge rate to minimize reflections and EMI. The 1
nSec minimum edge rate is tolerant of stub lengths up to 2
inches in length. M-LVDS devices also have a very large
common mode range for additional noise margin in heavily
loaded and noisy backplane environments
The DS91D180/DS91C180 driver input accepts LVTTL/
LVCMOS signals and converts them to differential M-LVDS
signal levels. The DS91D180/DS91C180 receiver accepts
low voltage differential signals (LVDS, B-LVDS, M-LVDS,
LV-PECL) and converts them to 3V LVCMOS signals. The
DS91D180 has a M-LVDS type 1 receiver input with no
offset.The DS91C180 receiver contains an M-LVDS ”type 2”
failsafe circuit with an internal 100 mV offset that provides a
LOW output for both short and open input conditions.
Features
n Meets TIA/EIA-899 M-LVDS Standard
n Capable of driving 32 M-LVDS loads
n Controlled edge rates tolerant to stubs
n Wide Common Mode for Increased Noise Immunity
n DS91D180 has type 1 receiver input
n DS91C180 has type 2 Fail-safe support
n Up to 200 Mbps operation
n Industrial temperature range
n Single 3.3 V Supply
n 14L SOIC Package (JEDEC MS-012)
Typical Application in AdvancedTCA Clock Distribution
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