TMUX6213 datasheet(25/45 Pages) TI2

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8 Detailed Description

8.1 Overview

The TMUX6211, TMUX6212, and TMUX6213 are 1:1 (SPST), 4-Channel switches. The devices have four

independently selectable single-pole, single-throw switches that are turned-on or turned-off based on the state of

the corresponding select pin.

8.2 Functional Block Diagram

SEL1

SEL2

SEL3

SEL4

VDD

VSS

VDD

VSS

VDD

VSS

SEL1

SEL2

SEL3

SEL4

SEL1

SEL2

SEL3

SEL4

TMUX6211

(SELx = Logic 1)

TMUX6212

(SELx = Logic 1)

TMUX6213

(SELx = Logic 1)

8.3 Feature Description

8.3.1 Bidirectional Operation

The TMUX621x conducts equally well from source (Sx) to drain (Dx) or from drain (Dx) to source (Sx). Each

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

8.3.2 Rail-to-Rail Operation

The valid signal path input and output voltage for TMUX621x ranges from VSS to VDD.

8.3.3 1.8 V Logic Compatible Inputs

The TMUX621x devices have 1.8-V logic compatible control for all logic control inputs. 1.8-V logic level inputs

allows the TMUX621x 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.

8.3.4 Integrated Pull-Down Resistor on Logic Pins

The TMUX621x has internal weak pull-down resistors to GND to so the logic pins are not left floating. The value

of this pull-down resistor is approximately 4MΩ, but is clamped to about 1µA at higher voltages. This feature

integrates up to four external components and reduces system size and cost.

8.3.5 Fail-Safe Logic

The TMUX621x supports Fail-Safe Logic on the control input pins (SEL1, SEL2, SEL3, and SEL4) allowing for

operation up to 36V, 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 feature allows the select pins of the TMUX621x to be ramped to 36V while VDD and VSS = 0

V. The logic control inputs are protected against positive faults of up to 36V in powered-off condition, but do not

offer protection against negative overvoltage conditions.

www.ti.com

TMUX6211, TMUX6212, TMUX6213

SCDS431D – OCTOBER 2020 – REVISED JULY 2024

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