SN74LVC2T45DCUR from Texas Instruments, in a VSSOP-8. 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 rail. Accepts 1.65 V to 5.5 V and sets the A-side logic level as well as the DIR input reference. Must be powered up before or with VCCB.
2	A1	bidirectional	Bit-1 data I/O on the A port, referenced to VCCA (1.65-5.5 V). Acts as input when DIR = H (A->B) and as 3-state output when DIR = L (B->A). Input circuit is always active and must be held at a valid level.
3	A2	bidirectional	Bit-2 data I/O on the A port, referenced to VCCA (1.65-5.5 V). Acts as input when DIR = H (A->B) and as 3-state output when DIR = L (B->A). Input circuit is always active and must be held at a valid level.
4	GND	power_in	Device ground. Must be connected before any supply rail is applied per the power-up sequence.
5	DIR	input	Direction-control input, referenced to VCCA. DIR = H transmits A -> B (B outputs enabled); DIR = L transmits B -> A (A outputs enabled). Input circuit is always active and must not float.
6	B2	bidirectional	Bit-2 data I/O on the B port, referenced to VCCB (1.65-5.5 V). Acts as output when DIR = H and as 3-state input when DIR = L. 3-state; both ports go high-impedance if either VCC is at GND.
7	B1	bidirectional	Bit-1 data I/O on the B port, referenced to VCCB (1.65-5.5 V). Acts as output when DIR = H and as 3-state input when DIR = L. 3-state; both ports go high-impedance if either VCC is at GND.
8	VCCB	power_in	B-port supply rail. Accepts 1.65 V to 5.5 V and sets the B-side logic level. May be ramped up along with or after VCCA.

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
Package	VSSOP-8
Category	Logic
Pins	8

Ordering variants

Same part, different packaging or reel option.

SN74LVC2T45DCUR
SN74LVC2T45DCURDCUT
SN74LVC2T45DCURDCTR
SN74LVC2T45DCURDCTT
SN74LVC2T45DCURYZPR

CAD (KiCad official)

Symbol: SN74LVC2T45DCUR
Footprint: Package_SO:VSSOP-8_2.3x2mm_P0.5mm
3D model: VSSOP-8 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`sn74lvc2t45dcur.step`	122 KB	You want the bare part, or you mark your own boards.
`sn74lvc2t45dcur-etched.step`	2.6 MB	You want the part with `SN74LVC2T45DCUR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 644 faces against 147 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 (26 pp, sha256 8d9730a9217e2efc, 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