SCAN90004 Datasheet | National Semiconductor

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 overes 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 Ser Des, 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 IEEE 1149.1 (JTAG) and 1149.6 circuitry supports testability of both single-ended LVTTL/CMOS and highspeed 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. 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 patible input, LVDS output n On-chip 100Ω input and output termination n 15 k V ESD protection on LVDS inputs and outputs n IEEE 1149.1 and 1149.6 pliant 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 Pinout - Top View SCAN90004 Block Diagram © 2005 National Semiconductor Corporation DS201130 .national. Pin Descriptions Pin Name IN0+ IN0- IN1+ IN1- IN2+ IN2- IN3+ IN3- OUT0+ OUT0- OUT1+ OUT1- OUT2+ OUT2- OUT3+ OUT3PWDN PEM0 PEM1 TDI TDO TMS TCK TRST POWER VDD GND 3, 4, 5, 7, 10, 11, 28, 29, 32, 33 8, 9, 17, 18, 23, 24, 37, 38, 43, 44 6, 30, 31, 36 I, Power I, Power VDD = 3.3V, ± 5% Ground TQFP Pin Number 13 14 15 16 19 20 21 22...