1. General description
The CBTL06GP212 is a six-channel (‘hex’) multiplexer for DisplayPort and PCI Express
applications at Generation 2 (‘Gen2’) speeds. It provides four differential channels
capable of 1 : 2 switching or 2 : 1 multiplexing (bidirectional and AC-coupled) PCI Express
or DisplayPort signals, using high-bandwidth pass-gate technology. It provides support for
high common-mode/bias voltage on the high speed differential channels. Additionally, it
provides for switching/multiplexing of the Hot Plug Detect signal as well as the AUX or
DDC (Direct Display Control) signals, for a total of six channels on the display side. The
AUX and DDC channels provide a four-position multiplexer such that an additional level of
multiplexing can be accomplished when AUX and DDC I/Os are on separate pins of the
display source device.
The CBTL06GP212 is designed for Gen2 speeds, at 5.0 Gbit/s for PCI Express or
5.4 Gbit/s for DisplayPort. It consumes 2 mA current (typical) in operational mode and
provides a shutdown function to support battery-powered applications.
A typical application of CBTL06GP212 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 CBTL06GP212 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.
2. Features
CBTL06GP212
High performance DisplayPort switch with high
common-mode voltage support
Rev. 1 — 2 May 2012 Product brief
1 : 2 switching or 2 : 1 multiplexing of DisplayPort
(v1.2 - 5.4 Gbit/s) or PCI Express (v2.0 - 5.0 Gbit/s)
signals
4 high-speed differential channels with
2 : 1 muxing/switching for DisplayPort or
PCI Express signals
1 channel with 4 : 1 muxing/switching
for AUX at 1 Mbit/s or DDC signals
1 channel with 2 : 1 muxing/switching
for single-ended HPD signal
R
ON
on DP high-speed channels: 6 Ω
Low insertion loss:
−0.5 dB at 100 MHz
−1.5 dB at 1.35 GHz
−2.5 dB at 2.7 GHz
Low crosstalk: −35 dB at 2.7 GHz
Low off-state isolation: −30 dB at 2.7 GHz
Low return loss: −8dB at 2.7GHz
Very low intra-pair skew (5 ps typical)
Very low inter-pair skew (< 80 ps)
High-bandwidth analog pass-gate technology 3 dB bandwidth at 5 GHz
Supports a wide range of common-mode/bias
voltage on high speed differential channels
Switch/multiplexer position select CMOS input
Shutdown mode CMOS input
Supports backdrive protection
Single 3.3 V power supply
Supports high-speed signal switching over a wide
common-mode range and differential swing
