1FEATURES

2? 1.5 Gbps Maximum Data Rate Per Channel

? Configurable Pre-emphasis Drives Lossy

Backplanes and Cables

? Low Output Skew and Jitter

? LVDS/CML/LVPECL Compatible Input, LVDS

Output

? On-chip 100Ω Input and Output Termination

? 12 kV ESD Protection on LVDS Outputs

? IEEE 1149.1 JTAG Interface

? IEEE 1149.6 Limited Capability

? Fault Insertion

? Single 3.3V Supply

? Very Low Power Consumption

? Industrial -40 to +85°C Temperature Range

? Small TQFP Package Footprint

? See DS90LV004 for Non-JTAG Version

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 TI'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 performance and minimize board

space. The repeater function is especially useful for

boosting signals for longer distance transmission over

lossy cables and backplanes.

Integrated testability circuitry supports IEEE1149.1

(JTAG) on single-ended LVTTL/CMOS I/O and

limited IEEE1149.6 capability on high-speed

differential LVDS interconnects. The 3.3V supply,

CMOS process, and LVDS I/O ensure stable high

performance at low power over the entire industrial -

40 to +85°C temperature range.