TMUX1308PWR from Texas Instruments, in a TSSOP-16-175mil. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	S4	bidirectional	Source pin 4. Analog/digital signal path that can be an input or output. Bidirectional, rail-to-rail from GND to VDD.
2	S6	bidirectional	Source pin 6. Analog/digital signal path that can be an input or output. Bidirectional, rail-to-rail from GND to VDD.
3	D	bidirectional	Drain pin (common). Shared analog/digital signal path that can be an input or output; connects to one of S0-S7 selected by A[2:0] when EN is low.
4	S7	bidirectional	Source pin 7. Analog/digital signal path that can be an input or output. Bidirectional, rail-to-rail from GND to VDD.
5	S5	bidirectional	Source pin 5. Analog/digital signal path that can be an input or output. Bidirectional, rail-to-rail from GND to VDD.
6	EN	input	Active-low enable logic input. When high, all switches are turned off. When low, the A[2:0] address inputs determine which switch is turned on. 1.8 V logic compatible; fail-safe logic allows voltage before VDD is applied.
7	NC	unconnected	Not internally connected. May be left floating or tied to any potential.
8	GND	power_in	Ground (0 V) reference.
9	A2	input	Address line 2 (MSB). Controls the switch configuration selecting one of S0-S7 as listed in the truth table. 1.8 V logic compatible.
10	A1	input	Address line 1. Controls the switch configuration selecting one of S0-S7 as listed in the truth table. 1.8 V logic compatible.
11	A0	input	Address line 0 (LSB). Controls the switch configuration selecting one of S0-S7 as listed in the truth table. 1.8 V logic compatible.
12	S3	bidirectional	Source pin 3. Analog/digital signal path that can be an input or output. Bidirectional, rail-to-rail from GND to VDD.
13	S0	bidirectional	Source pin 0. Analog/digital signal path that can be an input or output. Bidirectional, rail-to-rail from GND to VDD.
14	S1	bidirectional	Source pin 1. Analog/digital signal path that can be an input or output. Bidirectional, rail-to-rail from GND to VDD.
15	S2	bidirectional	Source pin 2. Analog/digital signal path that can be an input or output. Bidirectional, rail-to-rail from GND to VDD.
16	VDD	power_in	Positive power supply, 1.62 V to 5.5 V. Most positive supply potential. Connect a 0.1 uF to 10 uF decoupling capacitor between VDD and GND for reliable operation.

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
Package	TSSOP-16-175mil
Category	Comm/UART
Pins	16

Ordering variants

Same part, different packaging or reel option.

TMUX1308PWR
TMUX1308PWRDYYR
TMUX1308PWRDYY
TMUX1308PWRBQBR
TMUX1308PWRBQB

CAD (KiCad official)

Symbol: TMUX1308PWR
Footprint: Package_SO:TSSOP-16_4.4x5mm_P0.65mm
3D model: TSSOP-16-175mil (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`tmux1308pwr.step`	205 KB	You want the bare part, or you mark your own boards.
`tmux1308pwr-etched.step`	2.7 MB	You want the part with `TMUX1308PWR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 670 faces against 255 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

Datasheet: Texas Instruments datasheet (46 pp, sha256 9a123a5f68937572, retrieved 2026-08-17, tier: manufacturer)
Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF