Translates four logic signals between two voltage domains in either direction, without a direction pin: it senses which side is driving and follows automatically. The A side (VCCA) and B side (VCCB) each set their own rail from 1.65 to 5.5 V, so a 1.8 V SoC drives a 3.3 or 5 V peripheral and vice versa, and an OE pin three-states all channels. Integrated edge-rate control and pull-ups suit it to push-pull and lightly-loaded open-drain lines. A common glue part for mixed-voltage GPIO, SPI, and UART.

Pinout

Pin	Name	Type	Function
1	VCCA	power_in	A-port supply voltage. 1.65 V ≤ VCCA ≤ 3.6 V and VCCA ≤ VCCB. Sets the OE threshold and the A-side signal level.
2	A1	bidirectional	Bidirectional I/O channel 1, A side. Referenced to VCCA. Auto-sensing direction, supports push-pull and open-drain.
3	A2	bidirectional	Bidirectional I/O channel 2, A side. Referenced to VCCA.
4	A3	bidirectional	Bidirectional I/O channel 3, A side. Referenced to VCCA.
5	A4	bidirectional	Bidirectional I/O channel 4, A side. Referenced to VCCA.
6	NC	unconnected	No internal connection. May be left floating or tied to GND.
7	GND	power_in	Ground reference. Also the reference return for both supplies.
8	OE	input	3-state output-mode enable, referenced to VCCA. High = translator active. Low = all outputs Hi-Z. For a defined Hi-Z state at power-up/down, tie OE to GND through a pull-down resistor.
9	NC	unconnected	No internal connection.
10	B4	bidirectional	Bidirectional I/O channel 4, B side. Referenced to VCCB.
11	B3	bidirectional	Bidirectional I/O channel 3, B side. Referenced to VCCB.
12	B2	bidirectional	Bidirectional I/O channel 2, B side. Referenced to VCCB.
13	B1	bidirectional	Bidirectional I/O channel 1, B side. Referenced to VCCB.
14	VCCB	power_in	B-port supply voltage. 2.3 V ≤ VCCB ≤ 5.5 V, and must be ≥ VCCA. Sets the B-side signal level.

Key specifications

Parameter	Value
Type	Push-pull (edge-rate controlled)
Channels	4 (auto-direction)
A side	1.65-5.5 V
B side	1.65-5.5 V
Output enable	OE (three-state)
Package	SOIC-14

Ordering variants

Same part, different packaging or reel option.

TXS0104EDR (SOIC-14)
TXS0104EPWR (TSSOP-14)
TXS0104ERGYR (VQFN-14)

CAD (KiCad official)

Symbol: Logic_LevelTranslator:TXS0104ED (KiCad official)
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 (51 pp, sha256 8622dc5ff42a36e2, 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