SN74LVTH245APWR from Texas Instruments, in a TSSOP-20. 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	DIR	input	Direction control. When DIR=L, data flows from B to A; when DIR=H, data flows from A to B. TTL-compatible input, VIH ≥ 2 V, VIL ≤ 0.8 V.
2	A1	bidirectional	Channel-1 A-side bus port. Input or 3-state output depending on DIR and /OE. Includes active bus-hold circuitry to hold unused inputs at a valid logic level.
3	A2	bidirectional	Channel-2 A-side bus port. Input or 3-state output depending on DIR and /OE. Includes bus-hold.
4	A3	bidirectional	Channel-3 A-side bus port. Input or 3-state output depending on DIR and /OE. Includes bus-hold.
5	A4	bidirectional	Channel-4 A-side bus port. Input or 3-state output depending on DIR and /OE. Includes bus-hold.
6	A5	bidirectional	Channel-5 A-side bus port. Input or 3-state output depending on DIR and /OE. Includes bus-hold.
7	A6	bidirectional	Channel-6 A-side bus port. Input or 3-state output depending on DIR and /OE. Includes bus-hold.
8	A7	bidirectional	Channel-7 A-side bus port. Input or 3-state output depending on DIR and /OE. Includes bus-hold.
9	A8	bidirectional	Channel-8 A-side bus port. Input or 3-state output depending on DIR and /OE. Includes bus-hold.
10	GND	power_in	Device ground reference (0 V).
11	B8	bidirectional	Channel-8 B-side bus port. Input or 3-state output depending on DIR and /OE. Includes bus-hold.
12	B7	bidirectional	Channel-7 B-side bus port. Input or 3-state output depending on DIR and /OE. Includes bus-hold.
13	B6	bidirectional	Channel-6 B-side bus port. Input or 3-state output depending on DIR and /OE. Includes bus-hold.
14	B5	bidirectional	Channel-5 B-side bus port. Input or 3-state output depending on DIR and /OE. Includes bus-hold.
15	B4	bidirectional	Channel-4 B-side bus port. Input or 3-state output depending on DIR and /OE. Includes bus-hold.
16	B3	bidirectional	Channel-3 B-side bus port. Input or 3-state output depending on DIR and /OE. Includes bus-hold.
17	B2	bidirectional	Channel-2 B-side bus port. Input or 3-state output depending on DIR and /OE. Includes bus-hold.
18	B1	bidirectional	Channel-1 B-side bus port. Input or 3-state output depending on DIR and /OE. Includes bus-hold.
19	/OE	input	Active-low output enable. When /OE=L the transceiver is enabled and drives the destination bus per DIR; when /OE=H both A and B ports are in the high-impedance (isolation) state. Should be tied to VCC through a pull-up during power sequencing to guarantee Hi-Z at power-up/down.
20	VCC	power_in	3.3-V supply input. Recommended VCC = 2.7 V to 3.6 V; absolute max 4.6 V. Bypass locally with a 0.1 µF ceramic to GND.

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
Package	TSSOP-20
Category	Logic
Pins	20

Ordering variants

Same part, different packaging or reel option.

SN74LVTH245APWR
SN74LVTH245APWRAPWE4
SN74LVTH245APWRAPWG4
SN74LVTH245APWRE4
SN74LVTH245APWRG4
SN74LVTH245APWRADBR
SN74LVTH245APWRADBR.B
SN74LVTH245APWRADBR1G4
SN74LVTH245APWRADBR1G4.B
SN74LVTH245APWRADW
SN74LVTH245APWRADWR
SN74LVTH245APWRADW.B
SN74LVTH245APWRADWR.B
SN74LVTH245APWRADWRG4
SN74LVTH245APWRANSR
SN74LVTH245APWRANS.B
SN74LVTH245APWRANSR.B
SN74LVTH245APWRANSRG4
SN74LVTH245APWRARGYR
SN74LVTH245APWRARGYR.B
SN74LVTH245APWRARGYRG4
SN74LVTH245APWRARGYRG4.B
SN74LVTH245APWRAFK
SN74LVTH245APWRAJ
SN74LVTH245APWRAW
SN74LVTH245APWRAGQNR
SN74LVTH245APWRAZQNR

CAD (KiCad official)

Symbol: SN74LVTH245APWR
Footprint: Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm
3D model: TSSOP-20 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`sn74lvth245apwr.step`	267 KB	You want the bare part, or you mark your own boards.
`sn74lvth245apwr-etched.step`	2.9 MB	You want the part with `SN74LVTH245APWR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 761 faces against 327 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 (30 pp, sha256 7af52ff8d823ffed, 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