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SN74HC240DTR

Public Made by Adom

by adom

XBLW Buffers, Drivers, Receivers, Transceivers, SOP-20. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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Symbol & Footprint

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Datasheet

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Contents

README

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SN74HC240DTR

XBLW · Buffers, Drivers, Receivers, Transceivers · SOP-20

SN74HC240DTR from XBLW, in a SOP-20. 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 1OE input Active-LOW output enable input for the 1Y outputs; a HIGH puts them in high-impedance OFF-state.
2 1A0 input Data input.
3 2Y0 tri_state Bus output (3-state).
4 1A1 input Data input.
5 2Y1 tri_state Bus output (3-state).
6 1A2 input Data input.
7 2Y2 tri_state Bus output (3-state).
8 1A3 input Data input.
9 2Y3 tri_state Bus output (3-state).
10 GND power_in Ground (0 V).
11 2A3 input Data input.
12 1Y3 tri_state Bus output (3-state).
13 2A2 input Data input.
14 1Y2 tri_state Bus output (3-state).
15 2A1 input Data input.
16 1Y1 tri_state Bus output (3-state).
17 2A0 input Data input.
18 1Y0 tri_state Bus output (3-state).
19 2OE input Active-LOW output enable input for the 2Y outputs; a HIGH puts them in high-impedance OFF-state.
20 VCC power_in Supply voltage.

Key specifications

Parameter Value
Manufacturer XBLW
Package SOP-20
Category Logic
Pins 20

CAD (KiCad official)

  • Symbol: SN74HC240DTR
  • Footprint: Package_SO:SOP-20_7.5x12.8mm_P1.27mm
  • 3D model: SOP-20, generated from the KiCad footprint (body from the F.Fab outline, terminals on the pads, 2.65 mm nominal SOIC height). Neither the vendor nor KiCad ships a 3D model for this package, so the dimensions are nominal, not the manufacturer's CAD (STEP)
  • 3D model files: sn74hc240dtr-etched.step / sn74hc240dtr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); sn74hc240dtr.step / sn74hc240dtr.glb are the bare package body.

Provenance

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

  • Datasheet: XBLW datasheet (17 pp, sha256 95767b9945600aba, retrieved 2026-10-18, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (vision), consensus claude-opus-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