SN74AXC4T245PWR from Texas Instruments, in a TSSOP-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. Operating range 0.65V to 3.6V. Sets the reference rail for A-side I/Os and the xDIR/xOE control inputs.
2	1DIR	input	Direction-control input for the '1' transceiver pair. Referenced to VCCA. High = A→B, Low = B→A.
3	2DIR	input	Direction-control input for the '2' transceiver pair. Referenced to VCCA. High = A→B, Low = B→A.
4	1A1	bidirectional	Input/output 1A1 of transceiver pair 1, A-side. Referenced to VCCA (0.65V-3.6V logic level).
5	1A2	bidirectional	Input/output 1A2 of transceiver pair 1, A-side. Referenced to VCCA (0.65V-3.6V logic level).
6	2A1	bidirectional	Input/output 2A1 of transceiver pair 2, A-side. Referenced to VCCA (0.65V-3.6V logic level).
7	2A2	bidirectional	Input/output 2A2 of transceiver pair 2, A-side. Referenced to VCCA (0.65V-3.6V logic level).
8	GND	power_in	Ground return for both supply rails.
9	GND	power_in	Ground return for both supply rails.
10	2B2	bidirectional	Input/output 2B2 of transceiver pair 2, B-side. Referenced to VCCB (0.65V-3.6V logic level).
11	2B1	bidirectional	Input/output 2B1 of transceiver pair 2, B-side. Referenced to VCCB (0.65V-3.6V logic level).
12	1B2	bidirectional	Input/output 1B2 of transceiver pair 1, B-side. Referenced to VCCB (0.65V-3.6V logic level).
13	1B1	bidirectional	Input/output 1B1 of transceiver pair 1, B-side. Referenced to VCCB (0.65V-3.6V logic level).
14	2OE	input	Active-low tri-state output-mode enable for pair 2. Pull high to place '2' outputs in tri-state. Referenced to VCCA. Tie to VCCA through a pullup during power-up/down to force high-impedance.
15	1OE	input	Active-low tri-state output-mode enable for pair 1. Pull high to place '1' outputs in tri-state. Referenced to VCCA. Tie to VCCA through a pullup during power-up/down to force high-impedance.
16	VCCB	power_in	B-port power supply voltage. Operating range 0.65V to 3.6V. Sets the reference rail for B-side I/Os.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

SN74AXC4T245PWR
SN74AXC4T245PWRBQB
SN74AXC4T245PWRRSV

CAD (KiCad official)

Symbol: SN74AXC4T245PWR
Footprint: Package_SO:TSSOP-16_4.4x5mm_P0.65mm
3D model: TSSOP-16 (KiCad packages3D, STEP)

Provenance

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

Datasheet: Texas Instruments datasheet (41 pp, sha256 56d2fab11d8986f4, 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