TMUX1248DCKR from Texas Instruments, in a SC-70-6. 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	S2	bidirectional	Source pin 2 of the SPDT analog switch. Can be an input or output; signal path handles bidirectional analog/digital signals from GND to VDD (1.08 V to 5.5 V range).
2	GND	power_in	Ground (0 V) reference for the device.
3	S1	bidirectional	Source pin 1 of the SPDT analog switch. Can be an input or output; signal path handles bidirectional analog/digital signals from GND to VDD.
4	D	bidirectional	Drain (common) pin of the SPDT analog switch. Connects to either S1 or S2 depending on the SEL state; can be an input or output.
5	VDD	power_in	Positive power supply, most positive rail of the device. Operating range 1.08 V to 5.5 V; connect a 0.1 µF to 10 µF decoupling capacitor between VDD and GND for reliable operation.
6	SEL	input	Digital select input controlling which source (S1 or S2) is connected to D per the truth table. 1.8 V logic compatible (VIH ≥ 1.42 V at VDD = 5 V) with fail-safe logic and 5.5 V overvoltage tolerance independent of VDD.

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
Package	SC-70-6
Category	Comm/UART
Pins	6

Ordering variants

Same part, different packaging or reel option.

TMUX1248DCKR

CAD (KiCad official)

Symbol: TMUX1248DCKR
Footprint: Package_TO_SOT_SMD:SOT-363_SC-70-6
3D model: SC-70-6 (KiCad packages3D, STEP)

Provenance

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

Datasheet: Texas Instruments datasheet (31 pp, sha256 da96b95383399b5a, 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