TMUX7411F datasheet(39/48 Pages) TI

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11 Power Supply Recommendations

The TMUX7411F, TMUX7412F, and TMUX7413F operates across a wide supply range of ±5 V to ±22 V (8 V to

44 V in single-supply mode). They also perform well with asymmetrical supplies such as VDD = 12 V and VSS

= –5 V. Use a supply decoupling capacitor ranging from 1 µF to 10 µF at the VDD and VSS pins to ground for

improved supply noise immunity. Always ensure the ground (GND) connection is established before supplies are

ramped.

12 Layout

12.1 Layout Guidelines

Figure 12-1 and Figure 12-2 shows an example of a PCB layout with the TMUX741xF. The following are some

key considerations:

• Decouple the VDD and VSS pins with a 1-µF capacitor, placed as close to the pin as possible. Make sure that

the capacitor voltage rating is sufficient for the VDD and VSS supplies.

• Multiple decoupling capacitors can be used if their is a lot of noise in the system. For example, a 0.1-µF and

1-µF can be placed on the supply pins. If multiple capacitors are used, placing the lowest value capacitor

closest to the supply pin is recommended.

• Keep the input lines as short as possible.

• Use a solid ground plane to help distribute heat and reduce electromagnetic interference (EMI) noise pickup.

• Do not run sensitive analog traces in parallel with digital traces. Avoid crossing digital and analog traces if

possible, and only make perpendicular crossings when necessary.

12.2 Layout Example

SEL1

VSS

TMUX741xF

VDD

SEL2

SEL3

GND

SEL4

Wide (low inductance)

trace for power

Wide (low inductance)

trace for power

Via to ground plane

To Pull-up resistor

Figure 12-1. TSSOP Layout Example

VSS

VDD

GND

Via to ground plane

Via to power plane

To Pull-up resistor

Figure 12-2. WQFN Layout Example

www.ti.com

TMUX7411F, TMUX7412F, TMUX7413F

SCDS404B – MARCH 2021 – REVISED NOVEMBER 2022

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