SN74LVC1T45DBVR 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 (1.65V to 5.5V). Sets the A-port logic level; DIR input is also referenced to VCCA.
2	GND	power_in	Device ground reference (0 V).
3	A	bidirectional	A-port data I/O referenced to VCCA. Acts as an output when DIR = HIGH (B-to-A direction is not selected, output drives from B) - output level depends on VCCA. Tri-state (Hi-Z) when disabled via IOFF/VCC isolation. Drive strength up to ±24 mA at 3.3V.
4	B	bidirectional	B-port data I/O referenced to VCCB. Input threshold and output level depend on VCCB. Tri-state (Hi-Z) when disabled via IOFF/VCC isolation.
5	DIR	input	Direction control input referenced to VCCA. DIR = GND (low) selects B-to-A direction; DIR = VCCA (high) selects A-to-B direction. Must not be left floating.
6	VCCB	power_in	SYSTEM-2 supply voltage (1.65V to 5.5V). Sets the B-port logic level.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

SN74LVC1T45DBVR
SN74LVC1T45DBVRDBVT
SN74LVC1T45DBVRDCKR
SN74LVC1T45DBVRDCKT
SN74LVC1T45DBVRDRLR
SN74LVC1T45DBVRDPKR
SN74LVC1T45DBVRYZPR

CAD (KiCad official)

Symbol: SN74LVC1T45DBVR
Footprint: Package_TO_SOT_SMD:SOT-23-6
3D model: SOT-23-6 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`sn74lvc1t45dbvr.step`	97 KB	You want the bare part, or you mark your own boards.
`sn74lvc1t45dbvr-etched.step`	2.1 MB	You want the part with `SN74LVC1T45DBVR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 542 faces against 117 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 (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