DS42MB100 Datasheet | National Semiconductor

Description The DS42MB100 is a signal conditioning 2:1 multiplexer and 1:2 fan-out buffer designed for use in backplane redundancy or cable driving applications. Signal conditioning features include input equalization and programmable output de-emphasis that enable data munication in FR4 backplane up to 4.25 Gbps. Each input stage has a fixed equalizer to reduce ISI distortion from board traces. All output drivers have four selectable levels of de-emphasis to pensate for transmission losses from long FR4 backplane or cable attenuation reducing deterministic jitter. The de-emphasis levels can be independently controlled for the line-side and switch-side drivers. The internal loopback paths from switch-side input to switch-side output enable at-speed system testing. All receiver inputs and driver outputs are internally terminated with 100Ω differential terminating resistors. Features - - - - - - - - - - - 2:1 multiplexer and 1:2 buffer 0.25 - 4.25 Gbps fully differential data paths Fixed input equalization Programmable output de-emphasis Independent de-emphasis controls Programmable loopback modes On-chip terminations HBM ESD rating 5.5 k V on all pins +3.3V supply Lead-less LLP-36 package -40°C to +85°C operating temperature range Applications - Backplane driver or cable driver - Redundancy and signal conditioning applications - CPRI/OBSAI Functional Block Diagram .. © 2007 National Semiconductor Corporation .national. Simplified Block Diagram .. .national. Connection Diagram Order number DS42MB100TSQ See NS Package Number SQA36A .. .national. Pin Descriptions Pin Name IN+ IN- OUT+ OUT- OUT0+ OUT0- OUT1+ OUT1- IN0+ IN0- IN1+ IN1- MUX EQL EQS DEL_0 DEL_1 DES_0 DES_1 LB0 LB1 RSV POWER Pin Number 30 31 30 31 3 4 22 21 6 7 25 24 19 11 36 18 27 10 1 28 26 17 I I I I I I I/O I O Description Inverting and non-inverting differential inputs at the line side. IN+ and IN- have an internal...