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ISO7721FDR

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Texas Instruments Digital Isolators, SOIC-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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ISO7721FDR

Texas Instruments · Digital Isolators · SOIC-8

ISO7721FDR from Texas Instruments, in a SOIC-8. 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 VCC1 power_in Input supply voltage with operating range 2.25 V to 5.5 V.
2 OUTA output Channel A digital output with 100 Mbps data rate; output high voltage 4.8 V nominal (IOH = -4 mA), output low voltage 0.2 V to 0.4 V (IOL = 4 mA).
3 INB input Channel B digital input with high-level threshold 0.7 × VCCI and low-level threshold 0.3 × VCCI.
4 GND1 power_in Ground connection for input-side VCC1.
5 GND2 power_in Ground connection for output-side VCC2.
6 OUTB output Channel B digital output with 100 Mbps data rate; output high voltage 4.8 V nominal (IOH = -4 mA), output low voltage 0.2 V to 0.4 V (IOL = 4 mA).
7 INA input Channel A digital input with high-level threshold 0.7 × VCCI and low-level threshold 0.3 × VCCI.
8 VCC2 power_in Output supply voltage with operating range 2.25 V to 5.5 V.

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package SOIC-8
Category Signal Isolation Devices
Pins 8

CAD (KiCad official)

  • Symbol: ISO7721FDR
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOIC-8 (KiCad packages3D, STEP)
  • 3D model files: iso7721fdr-etched.step / iso7721fdr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); iso7721fdr.step / iso7721fdr.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (51 pp, sha256 7158bdf150cc2c73, retrieved 2026-10-05, 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-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