SCAN90004 Datasheet, PDF (1/8 Pages) National Semiconductor (TI) – 4-Channel LVDS Buffer/Repeater with Pre-Emphasis and IEEE 1149.6

November 2005
SCAN90004
4-Channel LVDS Buffer/Repeater
with Pre-Emphasis and IEEE 1149.6
General Description
The SCAN90004 is a four channel 1.5 Gbps LVDS buffer/
repeater. High speed data paths and flow-through pinout
minimize internal device jitter and simplify board layout,
while configurable pre-emphasis overcomes ISI jitter effects
from lossy backplanes and cables. The differential inputs
interface to LVDS, and Bus LVDS signals such as those on
National’s 10-, 16-, and 18- bit Bus LVDS SerDes, as well as
CML and LVPECL. The differential inputs and outputs are
internally terminated with a 100Ω resistor to improve perfor-
mance and minimize board space. The repeater function is
especially useful for boosting signals for longer distance
transmission over lossy cables and backplanes.
Integrated IEEE 1149.1 (JTAG) and 1149.6 circuitry supports
testability of both single-ended LVTTL/CMOS and high-
speed differential LVDS interconnects. The 3.3V supply,
CMOS process, and LVDS I/O ensure stable high perfor-
mance at low power over the entire industrial -40 to +85˚C
temperature range.
Features
n 1.5 Gbps data rate per channel
n Configurable pre-emphasis drives lossy backplanes and
cables
n Low output skew and jitter
n Hot plug protection
n LVDS/CML/LVPECL compatible input, LVDS output
n On-chip 100Ω input and output termination
n 15 kV ESD protection on LVDS inputs and outputs
n IEEE 1149.1 and 1149.6 compliant
n Fault Insertion
n Single 3.3V supply
n Very low power consumption
n Industrial -40 to +85˚C temperature range
n Small TQFP Package Footprint
n Evaluation Kit Available
n See DS90LV004 for non-JTAG version
20113001
SCAN90004 Block Diagram
© 2005 National Semiconductor Corporation DS201130
Pinout - Top View
20113002
www.national.com