SN74LVCC3245APWR from Texas Instruments, in a TSSOP-24. 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, 2.3 V to 3.6 V. Sets VIH/VIL thresholds for control inputs and A-port output HIGH level.
2	DIR	input	Direction-control input (referenced to VCCA). DIR = HIGH transfers data A -> B; DIR = LOW transfers data B -> A.
3	A1	bidirectional	A-port channel 1 I/O. Referenced to VCCA supply rail; high-impedance when OE is HIGH or during VCC isolation.
4	A2	bidirectional	A-port channel 2 I/O. Referenced to VCCA supply rail; high-impedance when OE is HIGH or during VCC isolation.
5	A3	bidirectional	A-port channel 3 I/O. Referenced to VCCA supply rail; high-impedance when OE is HIGH or during VCC isolation.
6	A4	bidirectional	A-port channel 4 I/O. Referenced to VCCA supply rail; high-impedance when OE is HIGH or during VCC isolation.
7	A5	bidirectional	A-port channel 5 I/O. Referenced to VCCA supply rail; high-impedance when OE is HIGH or during VCC isolation.
8	A6	bidirectional	A-port channel 6 I/O. Referenced to VCCA supply rail; high-impedance when OE is HIGH or during VCC isolation.
9	A7	bidirectional	A-port channel 7 I/O. Referenced to VCCA supply rail; high-impedance when OE is HIGH or during VCC isolation.
10	A8	bidirectional	A-port channel 8 I/O. Referenced to VCCA supply rail; high-impedance when OE is HIGH or during VCC isolation.
11	GND	power_in	Ground reference. Tie all three GND pins (11, 12, 13) to the board ground plane.
12	GND	power_in	Ground reference. Tie all three GND pins (11, 12, 13) to the board ground plane.
13	GND	power_in	Ground reference. Tie all three GND pins (11, 12, 13) to the board ground plane.
14	B8	bidirectional	B-port channel 8 I/O. Referenced to VCCB supply rail (3 V to 5.5 V); high-impedance when OE is HIGH or during VCC isolation.
15	B7	bidirectional	B-port channel 7 I/O. Referenced to VCCB supply rail (3 V to 5.5 V); high-impedance when OE is HIGH or during VCC isolation.
16	B6	bidirectional	B-port channel 6 I/O. Referenced to VCCB supply rail (3 V to 5.5 V); high-impedance when OE is HIGH or during VCC isolation.
17	B5	bidirectional	B-port channel 5 I/O. Referenced to VCCB supply rail (3 V to 5.5 V); high-impedance when OE is HIGH or during VCC isolation.
18	B4	bidirectional	B-port channel 4 I/O. Referenced to VCCB supply rail (3 V to 5.5 V); high-impedance when OE is HIGH or during VCC isolation.
19	B3	bidirectional	B-port channel 3 I/O. Referenced to VCCB supply rail (3 V to 5.5 V); high-impedance when OE is HIGH or during VCC isolation.
20	B2	bidirectional	B-port channel 2 I/O. Referenced to VCCB supply rail (3 V to 5.5 V); high-impedance when OE is HIGH or during VCC isolation.
21	B1	bidirectional	B-port channel 1 I/O. Referenced to VCCB supply rail (3 V to 5.5 V); high-impedance when OE is HIGH or during VCC isolation.
22	OE	input	Output-enable, active LOW (referenced to VCCA). OE = LOW enables the transceiver; OE = HIGH puts all A and B I/O in high impedance.
23	NC	unconnected	No internal connection. Leave floating or tie to ground.
24	VCCB	power_in	B-port supply rail, 3 V to 5.5 V. Sets B-port output HIGH level; can operate independently of VCCA for level translation.

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
Package	TSSOP-24
Category	Logic
Pins	24

Ordering variants

Same part, different packaging or reel option.

SN74LVCC3245APWR
SN74LVCC3245APWRDB
SN74LVCC3245APWRDBR
SN74LVCC3245APWRDW
SN74LVCC3245APWRDWR
SN74LVCC3245APWRDBQ
SN74LVCC3245APWRDBQR
SN74LVCC3245APWRNS
SN74LVCC3245APWRNSR

CAD (KiCad official)

Symbol: SN74LVCC3245APWR
Footprint: Package_SO:TSSOP-24_4.4x7.8mm_P0.65mm
3D model: TSSOP-24 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`sn74lvcc3245apwr.step`	315 KB	You want the bare part, or you mark your own boards.
`sn74lvcc3245apwr-etched.step`	3.6 MB	You want the part with `SN74LVCC3245APWR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 906 faces against 387 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 (32 pp, sha256 7db28552f9c96869, 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