SN74AVC4T245DR from Texas Instruments, in a SOIC-16. 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 power supply voltage. 1.2 V <= VCCA <= 3.6 V. Sets the reference voltage for the A-port I/Os and the DIR/OE control inputs.
2	1DIR	input	Direction-control input for the '1' 2-bit port pair (1A1/1A2 <-> 1B1/1B2). HIGH transmits A->B, LOW transmits B->A. Referenced to VCCA.
3	2DIR	input	Direction-control input for the '2' 2-bit port pair (2A1/2A2 <-> 2B1/2B2). HIGH transmits A->B, LOW transmits B->A. Referenced to VCCA.
4	1A1	bidirectional	Input/output 1A1 on the A side of the '1' transceiver bit. Referenced to VCCA (1.2 V to 3.6 V).
5	1A2	bidirectional	Input/output 1A2 on the A side of the '1' transceiver bit. Referenced to VCCA (1.2 V to 3.6 V).
6	2A1	bidirectional	Input/output 2A1 on the A side of the '2' transceiver bit. Referenced to VCCA (1.2 V to 3.6 V).
7	2A2	bidirectional	Input/output 2A2 on the A side of the '2' transceiver bit. Referenced to VCCA (1.2 V to 3.6 V).
8	GND	power_in	Ground reference for the device. Must be tied to system ground.
9	GND	power_in	Ground reference for the device. Must be tied to system ground.
10	2B2	bidirectional	Input/output 2B2 on the B side of the '2' transceiver bit. Referenced to VCCB (1.2 V to 3.6 V).
11	2B1	bidirectional	Input/output 2B1 on the B side of the '2' transceiver bit. Referenced to VCCB (1.2 V to 3.6 V).
12	1B2	bidirectional	Input/output 1B2 on the B side of the '1' transceiver bit. Referenced to VCCB (1.2 V to 3.6 V).
13	1B1	bidirectional	Input/output 1B1 on the B side of the '1' transceiver bit. Referenced to VCCB (1.2 V to 3.6 V).
14	2OE	input	Active-low 3-state output enable for the '2' transceiver bit. Drive LOW to enable outputs, HIGH to place 2A1/2A2/2B1/2B2 in Hi-Z. Referenced to VCCA.
15	1OE	input	Active-low 3-state output enable for the '1' transceiver bit. Drive LOW to enable outputs, HIGH to place 1A1/1A2/1B1/1B2 in Hi-Z. Referenced to VCCA.
16	VCCB	power_in	B-port power supply voltage. 1.2 V <= VCCB <= 3.6 V. Sets the reference voltage for the B-port I/Os.

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
Package	SOIC-16
Category	Logic
Pins	16

Ordering variants

Same part, different packaging or reel option.

SN74AVC4T245DRD
SN74AVC4T245DR
SN74AVC4T245DRDGV
SN74AVC4T245DRDGVR
SN74AVC4T245DRPW
SN74AVC4T245DRPWR
SN74AVC4T245DRRGY
SN74AVC4T245DRRGYR
SN74AVC4T245DRRSV
SN74AVC4T245DRRSVR
SN74AVC4T245DRBQB
SN74AVC4T245DRBQBR
SN74AVC4T245DRDYY
SN74AVC4T245DRDYYR

CAD (KiCad official)

Symbol: SN74AVC4T245DR
Footprint: Package_SO:SOIC-16_3.9x9.9mm_P1.27mm
3D model: SOIC-16 (KiCad packages3D, STEP)

Provenance

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

Datasheet: Texas Instruments datasheet (46 pp, sha256 218e7e3a60f567bb, 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