74LVC245AT20-13 from Diodes Incorporated, 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 input. When LOW, data flows from B bus to A bus; when HIGH, data flows from A bus to B bus. Schmitt-trigger input, tolerant to 5.5V.
2	A1	bidirectional	A-bus data I/O bit 1. Direction determined by DIR pin; high-impedance when OE is HIGH. 5.5V tolerant, sinks/sources 24 mA at VCC=3.0V.
3	A2	bidirectional	A-bus data I/O bit 2. Direction determined by DIR pin; high-impedance when OE is HIGH. 5.5V tolerant, sinks/sources 24 mA at VCC=3.0V.
4	A3	bidirectional	A-bus data I/O bit 3. Direction determined by DIR pin; high-impedance when OE is HIGH. 5.5V tolerant, sinks/sources 24 mA at VCC=3.0V.
5	A4	bidirectional	A-bus data I/O bit 4. Direction determined by DIR pin; high-impedance when OE is HIGH. 5.5V tolerant, sinks/sources 24 mA at VCC=3.0V.
6	A5	bidirectional	A-bus data I/O bit 5. Direction determined by DIR pin; high-impedance when OE is HIGH. 5.5V tolerant, sinks/sources 24 mA at VCC=3.0V.
7	A6	bidirectional	A-bus data I/O bit 6. Direction determined by DIR pin; high-impedance when OE is HIGH. 5.5V tolerant, sinks/sources 24 mA at VCC=3.0V.
8	A7	bidirectional	A-bus data I/O bit 7. Direction determined by DIR pin; high-impedance when OE is HIGH. 5.5V tolerant, sinks/sources 24 mA at VCC=3.0V.
9	A8	bidirectional	A-bus data I/O bit 8. Direction determined by DIR pin; high-impedance when OE is HIGH. 5.5V tolerant, sinks/sources 24 mA at VCC=3.0V.
10	GND	power_in	Ground reference (0 V). Continuous sink current through GND rated at -100 mA maximum.
11	B8	bidirectional	B-bus data I/O bit 8. Direction determined by DIR pin; high-impedance when OE is HIGH. 5.5V tolerant, sinks/sources 24 mA at VCC=3.0V.
12	B7	bidirectional	B-bus data I/O bit 7. Direction determined by DIR pin; high-impedance when OE is HIGH. 5.5V tolerant, sinks/sources 24 mA at VCC=3.0V.
13	B6	bidirectional	B-bus data I/O bit 6. Direction determined by DIR pin; high-impedance when OE is HIGH. 5.5V tolerant, sinks/sources 24 mA at VCC=3.0V.
14	B5	bidirectional	B-bus data I/O bit 5. Direction determined by DIR pin; high-impedance when OE is HIGH. 5.5V tolerant, sinks/sources 24 mA at VCC=3.0V.
15	B4	bidirectional	B-bus data I/O bit 4. Direction determined by DIR pin; high-impedance when OE is HIGH. 5.5V tolerant, sinks/sources 24 mA at VCC=3.0V.
16	B3	bidirectional	B-bus data I/O bit 3. Direction determined by DIR pin; high-impedance when OE is HIGH. 5.5V tolerant, sinks/sources 24 mA at VCC=3.0V.
17	B2	bidirectional	B-bus data I/O bit 2. Direction determined by DIR pin; high-impedance when OE is HIGH. 5.5V tolerant, sinks/sources 24 mA at VCC=3.0V.
18	B1	bidirectional	B-bus data I/O bit 1. Direction determined by DIR pin; high-impedance when OE is HIGH. 5.5V tolerant, sinks/sources 24 mA at VCC=3.0V.
19	~OE	input	Active-low output enable. When LOW, transceivers are enabled and pass data in the direction set by DIR. When HIGH, both A and B buses are placed in high-impedance (bus isolation).
20	VCC	power_in	Positive supply voltage input, 1.65 V to 3.6 V operating range (1.5 V minimum for data retention only). Decouple close to the pin.

Key specifications

Parameter	Value
Manufacturer	Diodes Incorporated
Package	TSSOP-20
Category	Logic
Pins	20

Ordering variants

Same part, different packaging or reel option.

74LVC245AT20-13
74LVC245AT20-13Q20-13

CAD (KiCad official)

Symbol: 74LVC245AT20-13
Footprint: Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm
3D model: TSSOP-20 (KiCad packages3D, STEP)

Provenance

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

Datasheet: Diodes Incorporated datasheet (10 pp, sha256 82a89c79af60b742, 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