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SN74HC245PWR

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by Ray

Texas Instruments Buffers, Drivers, Receivers, Transceivers, TSSOP-20. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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Contents

README

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SN74HC245PWR

Texas Instruments · Buffers, Drivers, Receivers, Transceivers · TSSOP-20

SN74HC245PWR 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 input. When DIR = H, data flows from A bus to B bus; when DIR = L, data flows from B bus to A bus (provided OE is low).
2 A1 bidirectional A-side bus I/O, channel 1. Input when DIR = L (transmits B1 to A1 when OE = L); output when DIR = H.
3 A2 bidirectional A-side bus I/O, channel 2. Direction controlled by DIR; high-Z when OE = H.
4 A3 bidirectional A-side bus I/O, channel 3. Direction controlled by DIR; high-Z when OE = H.
5 A4 bidirectional A-side bus I/O, channel 4. Direction controlled by DIR; high-Z when OE = H.
6 A5 bidirectional A-side bus I/O, channel 5. Direction controlled by DIR; high-Z when OE = H.
7 A6 bidirectional A-side bus I/O, channel 6. Direction controlled by DIR; high-Z when OE = H.
8 A7 bidirectional A-side bus I/O, channel 7. Direction controlled by DIR; high-Z when OE = H.
9 A8 bidirectional A-side bus I/O, channel 8. Direction controlled by DIR; high-Z when OE = H.
10 GND power_in Ground reference (0 V). Tie to system ground.
11 B8 bidirectional B-side bus I/O, channel 8. Direction controlled by DIR; high-Z when OE = H.
12 B7 bidirectional B-side bus I/O, channel 7. Direction controlled by DIR; high-Z when OE = H.
13 B6 bidirectional B-side bus I/O, channel 6. Direction controlled by DIR; high-Z when OE = H.
14 B5 bidirectional B-side bus I/O, channel 5. Direction controlled by DIR; high-Z when OE = H.
15 B4 bidirectional B-side bus I/O, channel 4. Direction controlled by DIR; high-Z when OE = H.
16 B3 bidirectional B-side bus I/O, channel 3. Direction controlled by DIR; high-Z when OE = H.
17 B2 bidirectional B-side bus I/O, channel 2. Direction controlled by DIR; high-Z when OE = H.
18 B1 bidirectional B-side bus I/O, channel 1. Direction controlled by DIR; high-Z when OE = H.
19 OE input Output-enable input, active low. When OE = L the transceiver is enabled and drives per DIR; when OE = H both A and B buses are isolated (high-impedance).
20 VCC power_in Positive supply, 2 V to 6 V (5 V nominal). Decouple locally with a bypass capacitor 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.

  • SN74HC245PWR
  • SN74HC245PWRDB
  • SN74HC245PWRDW
  • SN74HC245PWRN
  • SN74HC245PWRNS
  • SN74HC245PWRFK

CAD (KiCad official)

  • Symbol: SN74HC245PWR
  • 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: Texas Instruments datasheet (35 pp, sha256 c78c3a1bb10a438d, 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