TMUX1104

S1

D1

S2

S3

S4

A0

A1

EN

1-of-4

Decoder

21

TMUX1104

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SCDS392A – NOVEMBER 2018 – REVISED DECEMBER 2018

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8 Detailed Description

8.1 Functional Block Diagram

The TMUX1104 is an 4:1, 1-channel (single-ended) multiplexer or demultiplexer. Each input is turned on or

turned off based on the state of the address lines and enable pin.

Figure 28. TMUX1104 Functional Block Diagram

8.2 Feature Description

8.2.1 Bidirectional Operation

The TMUX1104 conducts equally well from source (Sx) to drain (Dx) or from drain (Dx) to source (Sx). Each

channel has very similar characteristics in both directions and supports both analog and digital signals.

8.2.2 Rail to Rail Operation

8.2.3 1.8 V Logic Compatible Inputs

The TMUX1104 has 1.8-V logic compatible control for all logic control inputs. The logic input thresholds scale

with supply but still provide 1.8-V logic control when operating at 5.5 V supply voltage. 1.8-V logic level inputs

allows the TMUX1104 to interface with processors that have lower logic I/O rails and eliminates the need for an

external translator, which saves both space and BOM cost. For more information on 1.8 V logic implementations

refer to Simplifying Design with 1.8 V logic Muxes and Switches

8.2.4 Fail-Safe Logic

The TMUX1104 supports Fail-Safe Logic on the control input pins (EN, A0, A1) allowing for operation up to 5.5

V, regardless of the state of the supply pin. This feature allows voltages on the control pins to be applied before

the supply pin, protecting the device from potential damage. Fail-Safe Logic minimizes system complexity by

removing the need for power supply sequencing on the logic control pins. For example, the Fail-Safe Logic

of another device up to 5.5 V.