SN74LVC1T45DBVT from Texas Instruments, in a SOT-23-6. 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	SYSTEM-1 supply voltage for the A port (1.65V to 5.5V). Sets the A-port output level and the DIR input threshold. Absolute max 6.5V.
2	GND	power_in	Device ground reference (0V).
3	A	bidirectional	A-port data I/O. Output level referenced to VCCA; input threshold also on VCCA side. Drives up to ±24mA at 3.3V. High-impedance when the port is disabled (opposite direction selected) or during VCC-isolation.
4	B	bidirectional	B-port data I/O. Output level referenced to VCCB; input threshold also on VCCB side. Drives up to ±24mA at 3.3V. High-impedance when the port is disabled or during VCC-isolation.
5	DIR	input	Direction-control input, referenced to VCCA. DIR=low (GND) enables B→A transmission (A is output); DIR=high (VCCA) enables A→B transmission (B is output). Must be driven high or low; must not float.
6	VCCB	power_in	SYSTEM-2 supply voltage for the B port (1.65V to 5.5V). Sets the B-port output level and B-port input threshold. Absolute max 6.5V.

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
Package	SOT-23-6
Category	Logic
Pins	6

Ordering variants

Same part, different packaging or reel option.

SN74LVC1T45DBVTDBVR
SN74LVC1T45DBVT
SN74LVC1T45DBVTDCKR
SN74LVC1T45DBVTDCKT
SN74LVC1T45DBVTDRLR
SN74LVC1T45DBVTDPKR
SN74LVC1T45DBVTYZPR

CAD (KiCad official)

Symbol: SN74LVC1T45DBVT
Footprint: Package_TO_SOT_SMD:SOT-23-6
3D model: SOT-23-6 (KiCad packages3D, STEP)

Provenance

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

Datasheet: Texas Instruments datasheet (42 pp, sha256 e6fbd84001613995, 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