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SN74HC244DW

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Texas Instruments Buffers, Drivers, Receivers, Transceivers, SOIC-20-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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SN74HC244DW

Texas Instruments · Buffers, Drivers, Receivers, Transceivers · SOIC-20-300mil

SN74HC244DW from Texas Instruments, in a SOIC-20-300mil. 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 for bank 1: when low, outputs 1Y1 to 1Y4 follow 1A1 to 1A4, and when high, they go to the high-impedance state.
2 1A1 input Data input for bank 1, channel 1, non-inverting to 1Y1 when 1OE is low; it is a standard CMOS input and must not be left floating.
3 2Y4 tri_state Three-state output of bank 2, channel 4, non-inverting copy of 2A4 when 2OE is low and high-impedance when 2OE is high; it must not be pulled above VCC.
4 1A2 input Data input for bank 1, channel 2, non-inverting to 1Y2 when 1OE is low; it is a standard CMOS input and must not be left floating.
5 2Y3 tri_state Three-state output of bank 2, channel 3, non-inverting copy of 2A3 when 2OE is low and high-impedance when 2OE is high; it must not be pulled above VCC.
6 1A3 input Data input for bank 1, channel 3, non-inverting to 1Y3 when 1OE is low; it is a standard CMOS input and must not be left floating.
7 2Y2 tri_state Three-state output of bank 2, channel 2, non-inverting copy of 2A2 when 2OE is low and high-impedance when 2OE is high; it must not be pulled above VCC.
8 1A4 input Data input for bank 1, channel 4, non-inverting to 1Y4 when 1OE is low; it is a standard CMOS input and must not be left floating.
9 2Y1 tri_state Three-state output of bank 2, channel 1, non-inverting copy of 2A1 when 2OE is low and high-impedance when 2OE is high; it must not be pulled above VCC.
10 GND power_in Ground reference pin for the device.
11 2A1 input Data input for bank 2, channel 1, non-inverting to 2Y1 when 2OE is low; it is a standard CMOS input and must not be left floating.
12 1Y4 tri_state Three-state output of bank 1, channel 4, non-inverting copy of 1A4 when 1OE is low and high-impedance when 1OE is high; it must not be pulled above VCC.
13 2A2 input Data input for bank 2, channel 2, non-inverting to 2Y2 when 2OE is low; it is a standard CMOS input and must not be left floating.
14 1Y3 tri_state Three-state output of bank 1, channel 3, non-inverting copy of 1A3 when 1OE is low and high-impedance when 1OE is high; it must not be pulled above VCC.
15 2A3 input Data input for bank 2, channel 3, non-inverting to 2Y3 when 2OE is low; it is a standard CMOS input and must not be left floating.
16 1Y2 tri_state Three-state output of bank 1, channel 2, non-inverting copy of 1A2 when 1OE is low and high-impedance when 1OE is high; it must not be pulled above VCC.
17 2A4 input Data input for bank 2, channel 4, non-inverting to 2Y4 when 2OE is low; it is a standard CMOS input and must not be left floating.
18 1Y1 tri_state Three-state output of bank 1, channel 1, non-inverting copy of 1A1 when 1OE is low and high-impedance when 1OE is high; it must not be pulled above VCC.
19 2OE input Active-low output enable for bank 2: when low, outputs 2Y1 to 2Y4 follow 2A1 to 2A4, and when high, they go to the high-impedance state.
20 VCC power_in Supply pin; recommended supply range is 2 V to 6 V, with an absolute maximum of 7 V.

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package SOIC-20-300mil
Category Logic
Pins 20

CAD (KiCad official)

  • Symbol: SN74HC244DW
  • Footprint: Package_SO:SOIC-20W_7.5x12.8mm_P1.27mm
  • 3D model: SOIC-20-300mil (KiCad packages3D, STEP)
  • 3D model files: sn74hc244dw-etched.step / sn74hc244dw-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); sn74hc244dw.step / sn74hc244dw.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (41 pp, sha256 75f58a56722eea30, retrieved 2026-10-08, tier: lcsc)
  • Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
  • 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