TXB0104PWR 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	VCCA	power_in	A-port supply voltage. 1.2 V ≤ VCCA ≤ 3.6 V and VCCA ≤ VCCB. Sets the logic level and reference for the A-side I/Os and the OE input circuit.
2	A1	bidirectional	Input/output 1, referenced to VCCA. Automatic direction sensing between A1 and B1 for bidirectional level translation.
3	A2	bidirectional	Input/output 2, referenced to VCCA. Paired with B2 for bidirectional level translation.
4	A3	bidirectional	Input/output 3, referenced to VCCA. Paired with B3 for bidirectional level translation.
5	A4	bidirectional	Input/output 4, referenced to VCCA. Paired with B4 for bidirectional level translation.
6	NC	unconnected	No connection. Not internally connected.
7	GND	power_in	Ground reference for the device.
8	OE	input	Tri-state output-mode enable, referenced to VCCA. Pull OE low to place all outputs in the high-impedance state; must be tied to GND through a pulldown resistor during power sequencing to ensure high-Z at power up/down.
9	NC	unconnected	No connection. Not internally connected.
10	B4	bidirectional	Input/output 4, referenced to VCCB. Paired with A4 for bidirectional level translation.
11	B3	bidirectional	Input/output 3, referenced to VCCB. Paired with A3 for bidirectional level translation.
12	B2	bidirectional	Input/output 2, referenced to VCCB. Paired with A2 for bidirectional level translation.
13	B1	bidirectional	Input/output 1, referenced to VCCB. Paired with A1 for bidirectional level translation.
14	VCCB	power_in	B-port supply voltage. 1.65 V ≤ VCCB ≤ 5.5 V and must be ≥ VCCA. Sets the logic level and reference for the B-side I/Os.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

TXB0104PWR
TXB0104PWRD
TXB0104PWRDYY
TXB0104PWRRGY
TXB0104PWRBQA
TXB0104PWRRUT
TXB0104PWRGXU
TXB0104PWRZXU
TXB0104PWRNMN
TXB0104PWRYZT

CAD (KiCad official)

Symbol: TXB0104PWR
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
`txb0104pwr.step`	194 KB	You want the bare part, or you mark your own boards.
`txb0104pwr-etched.step`	2.3 MB	You want the part with `TXB0104PWR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 592 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 (58 pp, sha256 a5a73c1e32c2f0fa, 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