CBTL05023 Datasheet, PDF (1/4 Pages) NXP Semiconductors – Multiplexer/demultiplexer switch for Thunderbolt applications

CBTL05023
Multiplexer/demultiplexer switch for Thunderbolt applications
Rev. 2 — 15 August 2012
Product brief
1. General description
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 × 3 mm HVQFN24
package with 0.4 mm pitch.
2. Features and benefits
2.1 AUX MUX 2 : 1 switch
 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 V_IC: 0 V to 3.3 V
 Differential input voltage V_ID: 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