9 Detailed Description

9.1 Overview

The TMUX4051 is an 8:1, single-ended (1-channel) mux, the TMUX4052 is a 4:1, differential (2-channel)

multiplexer, and the TMUX4053 is 2:1, 3 channel switch. Each channel is turned on or turned off based on the

state of the address lines and enable pin.

9.2 Functional Block Diagram

TMUX4051

A2

A1

A0

EN

S2

D

S3

S4

S5

S6

S7

S0

1-OF-8

DECODER

TMUX4052

S0A

DB

S1A

S2A

S3A

S0B

S1B

S2B

S3B

DA

A1

A0

EN

1-OF-4

DECODER

TMUX4053

S1A

S1B

D1

S2A

S2B

D2

S3A

S3B

D3

EN

SEL3

SEL2

SEL1

S1

LOGIC CONTROL

9.3 Feature Description

9.3.1 Bidirectional Operation

The TMUX4051, TMUX4052, and TMUX4053 devices conduct equally well from source (Sx) to drain (Dx) or

from drain (Dx) to source (Sx). Each signal path has very similar characteristics in both directions so they can be

used as both multiplexers and demultiplexer to support analog signals.

9.3.2 Rail-to-Rail Operation

The valid signal path input and output voltage for the TMUX4051, TMUX4052, and TMUX4053 ranges from VSS

to VDD.

9.3.3 1.8 V Logic Compatible Inputs

The TMUX4051, TMUX4052, and TMUX4053 support 1.8-V logic compatible control for all logic control inputs.

1.8-V logic level inputs allows the multiplexers to interface with processors that have lower logic I/O rails

and eliminates the need for an external voltage translator, which saves both space and BOM cost. For more

information on 1.8-V logic implementation, refer to Simplifying Design with 1.8 V logic Muxes and Switches.

9.3.4 Device Functional Modes

When the EN pin of the TMUX405x devices is pulled low, one of the switches is closed based on the state of the

address or select pins. When the EN pin is pulled high, all the switches are in an open state regardless of the

state of the address or select pins.

Unused logic control pins must be tied to GND or VDD to be certain that the device does not consume additional

current as highlighted in Implications of Slow or Floating CMOS Inputs. Unused signal path inputs (Sx and Dx)

should be connected to GND.

TMUX4051, TMUX4052, TMUX4053

SCDS445B – MAY 2022 – REVISED MARCH 2023

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