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ISOW7742FQDFMRQ1

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Texas Instruments Digital Isolators (With Power), SOIC-20. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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ISOW7742FQDFMRQ1

Texas Instruments · Digital Isolators (With Power) · SOIC-20

ISOW7742FQDFMRQ1 from Texas Instruments, in a SOIC-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 VIO power_in Side 1 logic supply, with a recommended range of 1.71 V to 5.5 V.
2 INA input Input channel A.
3 INB input Input channel B.
4 OUTC output Output channel C on ISOW7742-Q1.
5 OUTD output Output channel D.
6 GNDIO power_in Ground connection for VIO; GND1 and GNDIO need to be shorted on board.
7 EN_IO1 input Output Enable 1: high or open enables side 1 channel outputs; low puts them in high impedance and disables the side 1 input transmitters.
8 EN/FLT bidirectional Multi-function pin used either as power converter enable input (high to the VIO level enables, low at GND1 level disables) or as an active-low fault output needing a pull-up of 5 kΩ or greater.
9 VDD power_in Side 1 DC-DC converter power supply, with a range of 3 V to 5.5 V.
10 GND1 power_in Ground connection for VDD; GND1 and GNDIO need to be shorted on board.
11 GND2 power_in Ground connection for VISOOUT; GND2 and GISOIN can be shorted on board or connected through a ferrite bead.
12 VISOOUT power_out Isolated power converter output voltage; VISOIN and VISOOUT can be shorted on board or connected through a ferrite bead.
13 VSEL input VISOOUT selection pin: VISOOUT = 5 V when shorted to VISOOUT, 3.3 V when shorted to GND2.
14 EN_IO2 input Output Enable 2: high or open enables side 2 channel outputs; low puts them in high impedance and disables the side 2 input transmitters.
15 GISOIN power_in Ground connection for VISOIN; GND2 and GISOIN can be shorted on board or connected through a ferrite bead.
16 IND input Input channel D.
17 INC input Input channel C on ISOW7742-Q1.
18 OUTB output Output channel B.
19 OUTA output Output channel A.
20 VISOIN power_in Side 2 supply voltage for isolation channels; VISOIN and VISOOUT can be shorted on board or connected through a ferrite bead.

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package SOIC-20
Category Signal Isolation Devices
Pins 20

CAD (KiCad official)

  • Symbol: ISOW7742FQDFMRQ1
  • Footprint: Package_SO:SOIC-20W_7.5x12.8mm_P1.27mm
  • 3D model: SOIC-20 (KiCad packages3D, STEP)
  • 3D model files: isow7742fqdfmrq1-etched.step / isow7742fqdfmrq1-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); isow7742fqdfmrq1.step / isow7742fqdfmrq1.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (59 pp, sha256 5f94cde786001b58, retrieved 2026-10-03, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-4-5-20251001 (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