A 2-bit bidirectional voltage-level translator in VSSOP-8, for interfacing two logic domains at different voltages, such as a 1.8 V sensor and a 3.3 V MCU, or a 3.3 V MCU and 5 V I2C. Each of the two channels connects an A-side pin to a B-side pin and shifts signals both ways automatically, with no direction pin needed, thanks to one-shot edge accelerators and pull-ups that make it work for open-drain buses like I2C as well as push-pull signals. Separate VCCA and VCCB supplies (each 1.65-5.5 V) set the two logic levels, and an output-enable (OE) tri-states both channels. Its wider siblings are the TXS0104 and TXS0108.

Pinout

Pin	Name	Type	Function
1	B2	bidirectional	Input/output B, channel 2. Referenced to VCCB (2.3 V to 5.5 V). Bidirectional level-shifted I/O paired with A2; supports open-drain or push-pull.
2	GND	power_in	Ground reference for the device.
3	VCCA	power_in	A-port supply voltage. 1.65 V ≤ VCCA ≤ 3.6 V and VCCA ≤ VCCB. Sets the A-side logic reference and rails the A-side pass-transistor.
4	A2	bidirectional	Input/output A, channel 2. Referenced to VCCA (1.65 V to 3.6 V). Bidirectional level-shifted I/O paired with B2; supports open-drain or push-pull.
5	A1	bidirectional	Input/output A, channel 1. Referenced to VCCA (1.65 V to 3.6 V). Bidirectional level-shifted I/O paired with B1; supports open-drain or push-pull.
6	OE	input	Output enable, active high. Referenced to VCCA. Pull OE low to place all A- and B-port I/Os into 3-state (Hi-Z), which also drops quiescent current. Tie OE to GND through a pulldown during power-up/down to hold the device in Hi-Z.
7	VCCB	power_in	B-port supply voltage. 2.3 V ≤ VCCB ≤ 5.5 V and VCCB ≥ VCCA. Sets the B-side logic reference.
8	B1	bidirectional	Input/output B, channel 1. Referenced to VCCB (2.3 V to 5.5 V). Bidirectional level-shifted I/O paired with A1; supports open-drain or push-pull.

Key specifications

Parameter	Value
Type	2-bit bidirectional level translator
Channels	2 (auto-direction)
Voltage A / B	1.65-5.5 V each (independent)
Bus support	push-pull + open-drain (I2C)
Enable	OE (tri-state)
Direction control	automatic (no DIR pin)
Data rate	up to 24 Mbps (push-pull)
Package	VSSOP-8

Ordering variants

Same part, different packaging or reel option.

TXS0102DCUR (VSSOP-8)
TXS0102DCTR (SM8)

CAD (KiCad official)

Symbol: Logic_LevelTranslator:TXS0102DCT
Footprint: Package_SO:VSSOP-8_2.3x2mm_P0.5mm
3D model: VSSOP-8 (KiCad packages3D)

Provenance

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

Datasheet: Texas Instruments datasheet (45 pp, sha256 2f81661591dbfa6e, 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