SN74CBTLV3126PWR from Texas Instruments, in a TSSOP-14. 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	1OE	input	Output enable for switch channel 1, active high. When high, the FET switch between 1A and 1B is closed; when low, the switch is open (high impedance). VIH ≥ 2 V (VCC = 2.7-3.6 V).
2	1A	bidirectional	Channel 1 A-side switch terminal. Bidirectional data I/O; connects to 1B when 1OE is high. Rail-to-rail signal swing supported; ~5 Ω on-resistance.
3	1B	bidirectional	Channel 1 B-side switch terminal. Bidirectional data I/O; connects to 1A when 1OE is high.
4	2OE	input	Output enable for switch channel 2, active high. Closes the FET between 2A and 2B when high.
5	2A	bidirectional	Channel 2 A-side switch terminal. Bidirectional data I/O; connects to 2B when 2OE is high.
6	2B	bidirectional	Channel 2 B-side switch terminal. Bidirectional data I/O; connects to 2A when 2OE is high.
7	GND	power_in	Ground reference for the device.
8	3B	bidirectional	Channel 3 B-side switch terminal. Bidirectional data I/O; connects to 3A when 3OE is high.
9	3A	bidirectional	Channel 3 A-side switch terminal. Bidirectional data I/O; connects to 3B when 3OE is high.
10	3OE	input	Output enable for switch channel 3, active high. Closes the FET between 3A and 3B when high.
11	4B	bidirectional	Channel 4 B-side switch terminal. Bidirectional data I/O; connects to 4A when 4OE is high.
12	4A	bidirectional	Channel 4 A-side switch terminal. Bidirectional data I/O; connects to 4B when 4OE is high.
13	4OE	input	Output enable for switch channel 4, active high. Closes the FET between 4A and 4B when high.
14	VCC	power_in	Positive supply. Recommended VCC = 2.3 V to 3.6 V; absolute maximum 4.6 V. Decouple locally with a bypass capacitor.

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
Package	TSSOP-14
Category	Logic
Pins	14

Ordering variants

Same part, different packaging or reel option.

SN74CBTLV3126PWR
SN74CBTLV3126PWRD
SN74CBTLV3126PWRDGV
SN74CBTLV3126PWRRGY
SN74CBTLV3126PWRBQA
SN74CBTLV3126PWRDYY
SN74CBTLV3126PWRDBQ

CAD (KiCad official)

Symbol: SN74CBTLV3126PWR
Footprint: Package_SO:TSSOP-14_4.4x5mm_P0.65mm
3D model: TSSOP-14 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`sn74cbtlv3126pwr.step`	194 KB	You want the bare part, or you mark your own boards.
`sn74cbtlv3126pwr-etched.step`	3.1 MB	You want the part with `SN74CBTLV3126PWR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 785 faces against 237 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 (37 pp, sha256 65fbc35c107d5ea2, 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