CBTL05023BS: Multiplexer/demultiplexer switch for Thunderbolt applications

The CBTL05023 is a multiplexer/demultiplexer switch chip for DisplayPort v1.2 signals and the control signals of a 10 Gbit/s channel. The 10 Gbit/s channel does not pass through this switch. This chip provides BIASOUT output control signal, and the DC-biasing pull-down resistors to facilitate an external 10 Gbit/s channel.

The AUX MUX is a 2 : 1 switch with CA_DETect pin selecting between AUX and DDC (Direct Display Control) signals.

The DP MUX is a 2 : 1 switch that selects between DPML (DisplayPort Main Link) and LSTX/LSRX signals.

This chip also includes three control signal buffers: HPDOUT, CA_DETOUT and BIASOUT.

CBTL05023 is powered by a 3.3 V supply and it is available in 3 mm x 3 mm HVQFN24 package with 0.4 mm pitch.

sot905-1_3d

This 2 : 1 switch is controlled by CA_DET signal multiplexing of the 1 Mbit/s differential AUX and DDC (Direct Display Control) signals When CA_DET is HIGH, DDC path is selected
Differential AUX channel: Low insertion loss: -0.5 dB at 5 MHz Low return loss: -19 dB at 5 MHz Low ON-state resistance: 7.5 Ω Bandwidth: 5 GHz Low off-state isolation: -75 dB at 5 MHz Low crosstalk: -40 dB at 5 MHz Common-mode input voltage VIC: 0 V to 3.3 V Differential input voltage VID: 1.4 V (maximum)
DDC channel has DDC_CLK and DDC_DAT I²C signals 100 kHz 3.3 V voltage swing
Both AUXIO+ and AUXIO- outputs have 900 Ω (±20 %) pull-down resistor that is enabled by the status of the BIASOUT output pin These pull-down resistors provide DC bias for the 10 Gbit/s channel

The DP MUX is a 2:1 switch that is controlled by DP_PD pin multiplexing of a differential DPML signal and LSTX/LSRX signals

The DPML (DisplayPort Main Link) runs up to HBR2 data rate of 5.4 Gbit/s
The low speed DC coupled signals LSTX and LSRX are 3.3 V single-ended signals that operated at 1 Mbit/s
5.4 Gbit/s DPML channel: Low insertion loss for DP-DPMLO path: -2.0 dB at 2.5 GHz Low insertion loss for LS-DPMLO path: -2.0 dB at 2.5 GHz Low return loss for DP-DPMLO path: -15 dB at 2.5 GHz Low return loss for LS-DPMLO path: -14 dB at 2.5 GHz Low ON-state resistance for DP-DPMLO path: 9 Ω Low ON-state resistance for LS-DPMLO path: 13 Ω High bandwidth: 7 GHz Low off-state isolation: -20 dB at 2.5 GHz Low crosstalk: -25 dB at 2.5 GHz Common-mode input voltage VIC: 0 V to 3.3 V Differential input voltage VID: 1.4 V (maximum)

Data Sheets (1)

Name/Description	Modified Date
Multiplexer/demultiplexer switch for Thunderbolt applications (REV 5.0) PDF (251.0 kB) CBTL05023	15 Jul 2013

Package Information (1)

Name/Description	Modified Date
plastic thermal enhanced very thin quad flat package; no leads; 24 terminals; body 3 x 3 x 0.85 mm (REV 1.0) PDF (242.0 kB) SOT905-1	08 Feb 2016

Packing (1)

Name/Description	Modified Date
HVQFN24; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or... (REV 1.0) PDF (184.0 kB) SOT905-1_118	19 Apr 2013