CBTL02042A PDF – 2 : 1 Multiplexer/Demultiplexer Switch

Part Number: CBTL02042A

Function: 2 : 1 Multiplexer / Demultiplexer Switch

Package: DHVQFN20 Type

Manufacturer: NXP

Images:CBTL02042A datasheet


The CBTL02042A is a 2 differential channel, 2-to-1 multiplexer/demultiplexer switch for PCI
Express Generation 2 (Gen2), and other high-speed serial interface applications.

The CBTL02042B can switch two differential signals to one of two locations. Using a unique
design technique, NXP has minimized the impedance of the switch such that the attenuation observed through the switch is negligible, and also minimized the channel-to-channel skew as well as channel-to-channel crosstalk, as required by the high-speed serial interface. CBTL02042A/B allows expansion of existing high speed ports for extremely low power […]

CBTL02042A pdf

1. Multiplexer (MUX):

A multiplexer is a device that takes multiple input signals and selects one of them to pass through to the output based on control signals.

It is often represented as an “N-to-1” MUX, where “N” represents the number of input channels, and “1” represents the single output channel.
MUXes are used for various purposes, such as data routing, signal selection, and digital data compression.

In digital circuits, multiplexers are frequently used to reduce the number of required pins on integrated circuits (ICs) by allowing multiple signals to share a common data path.

2. Demultiplexer (DEMUX):

A demultiplexer is the reverse of a multiplexer. It takes a single input signal and routes it to one of several possible output channels based on control signals.

It is often represented as a “1-to-N” DEMUX, where “1” represents the single input channel, and “N” represents the number of output channels.
DEMUXes are commonly used in communication systems to distribute a single input signal to multiple destinations or receivers.

In digital circuits, demultiplexers can be used to separate data that has been multiplexed for transmission and distribute it to the appropriate receiver.


1. 2 bidirectional differential channel, 2 : 1 multiplexer/demultiplexer

2. High-speed signal switching for PCIe Gen2 5 Gbit/s

3. High bandwidth : 7 GHz at −3 dB

4. Low intra-pair skew : 5 ps typical

5. Low inter-pair skew : 35 ps maximum

6. Low crosstalk : – 30 dB at 2.5 GHz

7. Low off-state isolation : -25 dB at 2.5 GHz

8. Low return loss : – 20 dB at 2.5 GHz


Other data sheets are available within the file: CBTL02042A, CBTL02042

CBTL02042A PDF Datasheet