TMUX8109 datasheet(26/43 Pages) TI1

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9.4 Device Functional Modes

9.4.1 Normal Mode

In Normal Mode operation, signals of up to VDD and VSS can be passed through the switch from source (Sx) to

drain (D or Dx) or from drain (D or Dx) to source (Sx). Table 9-1 and Table 9-2 provides the address (Ax) pins

and the enable (EN) pin determines which switch path to turn on. The following conditions must be satisfied for

the switch to stay in the ON condition:

• The difference between the primary supplies (VDD – VSS) must be greater than or equal to 10 V. With a

minimum VDD of 10 V.

• The input signals on the source (Sx) or the drain (Dx) must be between VDD and VSS.

• The logic control address pins (Ax) must have selected the switch path.

9.4.2 Truth Tables

Table 9-1 provides the truth tables for the TMUX8108.

Table 9-1. TMUX8108 Truth Table

Normal Condition

X(1)

None

(1)

"X" means "do not care."

Table 9-2 provides the truth tables for the TMUX8109.

Table 9-2. TMUX8109 Truth Table

Normal Condition

X(1)

None

S1x

S2x

S3x

S4x

(1)

"X" means "do not care."

If unused, then address (Ax) pins must be tied to GND or Logic High in so that the device does not consume

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

or Dx) should be connected to GND for best performance.

TMUX8108, TMUX8109

SCDS435B – SEPTEMBER 2021 – REVISED AUGUST 2023

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TMUX8109 Datasheet(PDF) 26 Page - Texas Instruments