CBTL03SB212 DisplayPort Gen2 sideband signal multiplexer Rev. 1 21 February 2011 Product data sheet 1. General description The CBTL03SB212 is a sideband signal multiplexer for DisplayPort Gen2 applications. It provides one differential channel capable of switching or multiplexing (bidirectional and AC-coupled) DisplayPort 1.2 Fast AUX or AUX signal, using high-bandwidth pass-gate technology. Additionally, it provides for switching/multiplexing of the Hot Plug Detect signal as well as the Display Data Channel (DDC) signals, for a total of three channels. A typical application of CBTL03SB212 is on motherboards where one of two GPU display sources needs to be selected to connect to a display sink device or connector. A controller chip selects which path to use by setting a select signal HIGH or LOW. Due to the non-directional nature of the signal paths (which use high-bandwidth pass-gate technology), the CBTL03SB212 can also be used in the reverse topology, e.g., to connect one display source device to one of two display sink devices or connectors. GND CBTL03SB212 100 k AUX1+ AUX1 AUX+ 2 : 1 MUX AUX AUX2+ AUX2 100 k +3.3 V +3.3 V 2 k GPU1 DDC CLK1 DDC DAT1 DDC CLK 2 : 1 MUX DDC DAT DDC CLK2 DDC DAT2 HPD 1 2 : 1 HPD MUX HPD 2 SEL, XSD N GPU2 002aag007 Fig 1. CBTL03SB212 application exampleCBTL03SB212 NXP Semiconductors DisplayPort Gen2 sideband signal multiplexer 2. Features and benefits 1 : 2 multiplexing of DisplayPort signals 1 high-speed differential channel for Fast AUX or AUX 1 channel for DDC clock and data 1 channel for HPD High-bandwidth analog pass-gate technology Very low intra-pair differential skew (5 ps typical) Switch/MUX position select Shutdown mode CMOS input Shutdown mode minimizes power consumption while switching all channels off Very low operation current of 0.2 mA typical Very low shutdown current of < 10 A Single 3.3 V power supply ESD 4 kV HBM, 1 kV CDM Available in 4 mm 4 mm HVQFN20 package 3. Applications Motherboard applications requiring DisplayPort sideband switching/multiplexing Docking stations Notebook computers 4. Ordering information Table 1. Ordering information Type number Package Name Description Version CBTL03SB212BS HVQFN20 plastic thermal enhanced very thin quad flat package no leads SOT917-1 1 20 terminals body 4 4 0.85 mm 1 Total height after printed-circuit board mounting = 1 mm (maximum). CBTL03SB212 All information provided in this document is subject to legal disclaimers. NXP B.V. 2011. All rights reserved. Product data sheet Rev. 1 21 February 2011 2 of 16