TXB0104DR from Texas Instruments, in a SOIC-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. 1.2V <= VCCA <= 3.6V and VCCA <= VCCB. Also supplies the OE input circuit.
2	A1	bidirectional	Input/output 1 on the A port. Referenced to VCCA. Auto-sensing bidirectional level-translated I/O to B1.
3	A2	bidirectional	Input/output 2 on the A port. Referenced to VCCA. Auto-sensing bidirectional level-translated I/O to B2.
4	A3	bidirectional	Input/output 3 on the A port. Referenced to VCCA. Auto-sensing bidirectional level-translated I/O to B3.
5	A4	bidirectional	Input/output 4 on the A port. Referenced to VCCA. Auto-sensing bidirectional level-translated I/O to B4.
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 high-impedance (tri-state) mode; a pulldown resistor to GND is recommended to ensure Hi-Z during power up/down.
9	NC	unconnected	No connection. Not internally connected.
10	B4	bidirectional	Input/output 4 on the B port. Referenced to VCCB. Auto-sensing bidirectional level-translated I/O to A4.
11	B3	bidirectional	Input/output 3 on the B port. Referenced to VCCB. Auto-sensing bidirectional level-translated I/O to A3.
12	B2	bidirectional	Input/output 2 on the B port. Referenced to VCCB. Auto-sensing bidirectional level-translated I/O to A2.
13	B1	bidirectional	Input/output 1 on the B port. Referenced to VCCB. Auto-sensing bidirectional level-translated I/O to A1.
14	VCCB	power_in	B-port supply voltage. 1.65V <= VCCB <= 5.5V. Must be greater than or equal to VCCA.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

TXB0104DRD
TXB0104DR
TXB0104DRPW
TXB0104DRPWR
TXB0104DRDYY
TXB0104DRDYYR
TXB0104DRRGY
TXB0104DRRGYR
TXB0104DRBQA
TXB0104DRBQAR
TXB0104DRRUT
TXB0104DRRUTR
TXB0104DRGXU
TXB0104DRZXU
TXB0104DRGXUR
TXB0104DRZXUR
TXB0104DRNMN
TXB0104DRNMNR
TXB0104DRYZT
TXB0104DRYZTR

CAD (KiCad official)

Symbol: TXB0104DR
Footprint: Package_SO:SOIC-14_3.9x8.7mm_P1.27mm
3D model: SOIC-14 (KiCad packages3D, STEP)

Provenance

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

Datasheet: Texas Instruments datasheet (55 pp, sha256 9a852f7bcc4104df, 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