SN74LVC1T45QDCKRQ1 from Texas Instruments, in a SC-70-6. 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 (A-port) supply voltage, 1.65 V to 5.5 V. Sets the A-port I/O rail and is the reference for the DIR input. If VCCA is at GND, both ports are placed in the high-impedance state.
2	GND	power_in	Device ground reference (0 V) for both supply rails.
3	A	bidirectional	A-port data I/O. Output level and input threshold are referenced to VCCA (1.65 V-5.5 V). Drives up to ±24 mA at 3.3 V. Data direction relative to B is set by DIR.
4	B	bidirectional	B-port data I/O. Output level and input threshold are referenced to VCCB (1.65 V-5.5 V). Drives up to ±24 mA at 3.3 V. Data direction relative to A is set by DIR.
5	DIR	input	Direction control input, referenced to VCCA. DIR = High selects A→B (A is input, B is output); DIR = Low selects B→A (B is input, A is output).
6	VCCB	power_in	SYSTEM-2 (B-port) supply voltage, 1.65 V to 5.5 V. Sets the B-port I/O rail. If VCCB is at GND, both ports are placed in the high-impedance state.

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
Package	SC-70-6
Category	Logic
Pins	6

Ordering variants

Same part, different packaging or reel option.

SN74LVC1T45QDCKRQ1
SN74LVC1T45QDCKRQ1DCKT

CAD (KiCad official)

Symbol: SN74LVC1T45QDCKRQ1
Footprint: Package_TO_SOT_SMD:SOT-363_SC-70-6
3D model: SC-70-6 (KiCad packages3D, STEP)

Provenance

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

Datasheet: Texas Instruments datasheet (29 pp, sha256 dde2d43289f87195, 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