NXP CBTL05024 is a multiplexer/demultiplexer switch chip optimized to interface the Thunderbolt / MiniDP connector with Thunderbolt systems. It supports 10.3125 Gbit/s Thunderbolt or DisplayPort v1.2 channels.

The TB MUX is a 3:1 switch that selects between Thunderbolt data path and DisplayPort v1.2 side-band signals, either DDC or AUX.

The DP MUX is a 2:1 switch that selects between DP ML (DisplayPort main link) and LS TX/RX signals. Both LSTX and LSRX are the side-band signals for the Thunderbolt channel.

This chip also includes HPD and CA_DET buffers for HPD_IN and CA_DET control signals.

CBTL05024 is powered by a 3.3 V supply and it is available in a 3 mm x 3 mm HVQFN24 package with 0.4 mm pitch.

• The input of the HPD (hot plug detect) buffer is 5 V tolerant
• HPDOUT and CA_DETOUT buffers
  • CA_DET input leakage current < 0.1µA to prevent driving the 1 MΩ pull-down to a HIGH level
• Integrated LSRX buffer with 1 MΩ pull-down resistor (R1) on the LSRX buffer input
• Integrated 8.75 kΩ pull-up resistor (R4) on the LSTX pin
• When AUXIO_EN = 1, TB_ENA = 0 and DP_PD = 1, the CBTL05024 is in detect mode
  • AUXIO+ and AUXIO- of the TB MUX are disabled
  • LS path is selected in DP MUX
  • CA_DET and HPD buffers are on
  • When the CBTL05024 is in detect mode, this chip consumes < 18 µW
• Patent-pending high-bandwidth analog pass-gate technology
• Very-low intra-pair differential skew (5 ps typical)
• Back current protection on connector pins (AUXIO+/-, DPMLO+/-, CA_DET and HPD pins)
• All channels support rail-to-rail input voltage
• All CMOS input buffer with hysteresis
• Single 3.3 V ±10 % power supply
• HVQFN24 3 mm x 3 mm package, 0.4 mm pitch, exposed center pad for thermal relief and electrical ground
• ESD: 2000 V HBM, 1000 V CDM
• Operating temperature range -20°C to 85°C