TMUX1119

SEL

S1

D

S2

21

TMUX1119

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SCDS401 – DECEMBER 2018

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8 Detailed Description

8.1 Functional Block Diagram

The TMUX1119 is an 2:1, 1-ch. (SPDT), analog switch where the input is controlled with a single select (SEL)

control pin.

Figure 25. TMUX1119 Functional Block Diagram

8.2 Feature Description

8.2.1 Bidirectional Operation

The TMUX1119 conducts equally well from source (Sx) to drain (D) or from drain (D) to source (Sx). The device

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 TMUX1119 has 1.8-V logic compatible control for the logic control input (SEL). The logic input threshold

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

inputs allow the TMUX1119 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 TMUX1119 supports Fail-Safe Logic on the control input pin (SEL) allowing for operation up to 5.5 V,

regardless of the state of the supply pin. This feature allows voltages on the control pin 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.