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SN74ALS245ANSR

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Texas Instruments Buffers / Drivers, SOIC-20-208mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentlogic icssn74als245ansrfactory-2.0.0extractor-text

Verified SN74ALS245ANSR

by Ray · last 30 Oct 2026 · 1 record · files match
SymbolFootprint3D modelPins

Verification log 1 record

30 Oct 2026RayPublished by the parts factory: tier mfr, 20 pinsfiles match
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: SN74ALS245ANSR · SOIC-20-208mil · 20 pins
  • ✓copper: 20 copper pads, none touching another net
  • ✓datasheet: all 20 pin names found in the 23-page datasheet
  • ✓distributor: lcsc C2675891, digikey 296-24979-2-ND, mouser 595-SN74ALS245ANSR
  • ✓family: SOIC-20W_7.5x12.8mm_P1.27mm
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-b8b8y1t7/x.lbr is a valid EAGLE .lbr with complete deviceset
  • ✓license: CC-BY-SA-4.0
  • ✓models_3d: 2 records
  • •package_fit (skip): no component.package_dims on the page: the model is unchecked against the datasheet drawing
  • ✓pads: 20 pins = 20 pads
  • ✓pose: 2 STEP(s) Z-up, seated, centred
  • ✓symbol: 20 pins agree
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ sn74als245ansr.kicad_sym✓ sn74als245ansr.kicad_mod✓ sn74als245ansr.step
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SN74ALS245ANSR

Texas Instruments · Buffers / Drivers · SOIC-20-208mil

SN74ALS245ANSR from Texas Instruments, in a SOIC-20-208mil. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 DIR input Direction-control input: a low level selects B-to-A data transfer and a high level selects A-to-B data transfer when OE is low.
2 A1 bidirectional A-bus port 1, a 3-state I/O that drives bus lines directly; I/O ports are rated to 5.5 V maximum input voltage.
3 A2 bidirectional A-bus port 2, a 3-state I/O that drives bus lines directly; I/O ports are rated to 5.5 V maximum input voltage.
4 A3 bidirectional A-bus port 3, a 3-state I/O that drives bus lines directly; I/O ports are rated to 5.5 V maximum input voltage.
5 A4 bidirectional A-bus port 4, a 3-state I/O that drives bus lines directly; I/O ports are rated to 5.5 V maximum input voltage.
6 A5 bidirectional A-bus port 5, a 3-state I/O that drives bus lines directly; I/O ports are rated to 5.5 V maximum input voltage.
7 A6 bidirectional A-bus port 6, a 3-state I/O that drives bus lines directly; I/O ports are rated to 5.5 V maximum input voltage.
8 A7 bidirectional A-bus port 7, a 3-state I/O that drives bus lines directly; I/O ports are rated to 5.5 V maximum input voltage.
9 A8 bidirectional A-bus port 8, a 3-state I/O that drives bus lines directly; I/O ports are rated to 5.5 V maximum input voltage.
10 GND power_in Ground reference; all unused inputs must be held at VCC or GND to ensure proper device operation.
11 B8 bidirectional B-bus port 8, a 3-state I/O that drives bus lines directly; I/O ports are rated to 5.5 V maximum input voltage.
12 B7 bidirectional B-bus port 7, a 3-state I/O that drives bus lines directly; I/O ports are rated to 5.5 V maximum input voltage.
13 B6 bidirectional B-bus port 6, a 3-state I/O that drives bus lines directly; I/O ports are rated to 5.5 V maximum input voltage.
14 B5 bidirectional B-bus port 5, a 3-state I/O that drives bus lines directly; I/O ports are rated to 5.5 V maximum input voltage.
15 B4 bidirectional B-bus port 4, a 3-state I/O that drives bus lines directly; I/O ports are rated to 5.5 V maximum input voltage.
16 B3 bidirectional B-bus port 3, a 3-state I/O that drives bus lines directly; I/O ports are rated to 5.5 V maximum input voltage.
17 B2 bidirectional B-bus port 2, a 3-state I/O that drives bus lines directly; I/O ports are rated to 5.5 V maximum input voltage.
18 B1 bidirectional B-bus port 1, a 3-state I/O that drives bus lines directly; I/O ports are rated to 5.5 V maximum input voltage.
19 OE input Output-enable input; a high level disables the device so that the A and B buses are effectively isolated.
20 VCC power_in Supply voltage, recommended operating range 4.5 V to 5.5 V (nominal 5 V).

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package SOIC-20-208mil
Category Logic ICs
Pins 20

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Supply voltage VCC 4.5 5 5.5 V 3
High-level input voltage VIH 2 V 3
Low-level input voltage VIL 0.8 V 3
High-level output current IOH -15 mA 3
Low-level output current IOL 24 mA 3
Operating free-air temperature TA 0 70 °C 3
Supply voltage VCC 7 V 2
Input voltage, all inputs VI 7 V 2
Input voltage, I/O ports VI 5.5 V 2
Storage temperature range -65 150 °C 2
Package thermal impedance, NS package θJA 60 °C/W NS package, see Note 1 2
Input clamp voltage VIK -1.5 V VCC = 4.5 V, II = -18 mA 3
High-level output voltage VOH 2.4 3.2 V IOH = -3 mA 3
High-level output voltage VOH 2 V VCC = 4.5 V, IOH = -15 mA 3
Low-level output voltage VOL 0.25 0.4 V VCC = 4.5 V, IOL = 12 mA 3
Low-level output voltage VOL 0.35 0.5 V VCC = 4.5 V, IOL = 24 mA 3
Input current at maximum input voltage, control inputs II 0.1 mA VCC = 5.5 V, VI = 7 V 3
Input current at maximum input voltage, A or B ports II 0.1 mA VCC = 5.5 V, VI = 5.5 V 3
High-level input current, control inputs IIH 20 µA VCC = 5.5 V, VI = 2.7 V 3
High-level input current, A or B ports IIH 20 µA VCC = 5.5 V, VI = 2.7 V 3
Low-level input current, control inputs IIL -0.1 mA VCC = 5.5 V, VI = 0.4 V 3
Low-level input current, A or B ports IIL -0.1 mA VCC = 5.5 V, VI = 0.4 V 3
Short-circuit output current IO -30 -112 mA VCC = 5.5 V, VO = 2.25 V 3
Supply current, outputs high ICC 30 45 mA VCC = 5.5 V 3
Supply current, outputs low ICC 36 55 mA VCC = 5.5 V 3
Supply current, outputs disabled ICC 38 58 mA VCC = 5.5 V 3
Propagation delay low-to-high, A or B to B or A tPLH 3 10 ns VCC = 4.5 V to 5.5 V, CL = 50 pF, R1 = 500 Ω, R2 = 500 Ω 4
Propagation delay high-to-low, A or B to B or A tPHL 3 10 ns VCC = 4.5 V to 5.5 V, CL = 50 pF, R1 = 500 Ω, R2 = 500 Ω 4
Enable time low-to-high, OE to A or B tPZH 5 20 ns VCC = 4.5 V to 5.5 V, CL = 50 pF, R1 = 500 Ω, R2 = 500 Ω 4
Enable time high-to-low, OE to A or B tPZL 5 20 ns VCC = 4.5 V to 5.5 V, CL = 50 pF, R1 = 500 Ω, R2 = 500 Ω 4
Disable time low-to-high-impedance, OE to A or B tPHZ 2 10 ns VCC = 4.5 V to 5.5 V, CL = 50 pF, R1 = 500 Ω, R2 = 500 Ω 4
Disable time high-to-low-impedance, OE to A or B tPLZ 4 15 ns VCC = 4.5 V to 5.5 V, CL = 50 pF, R1 = 500 Ω, R2 = 500 Ω 4

CAD (KiCad official)

  • Symbol: SN74ALS245ANSR
  • Footprint: Package_SO:SOIC-20W_7.5x12.8mm_P1.27mm
  • 3D model: SOIC-20-208mil (KiCad packages3D, STEP)
  • 3D model files: sn74als245ansr-etched.step / sn74als245ansr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); sn74als245ansr.step / sn74als245ansr.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (23 pp, sha256 641442de7d0147b7, retrieved 2026-10-30, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF