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ISO6721FBDR

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by Ray

Texas Instruments Digital Isolators, SOIC-8. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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3D Model

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Symbol & Footprint

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Datasheet

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Contents

README

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ISO6721FBDR

Texas Instruments · Digital Isolators · SOIC-8

ISO6721FBDR from Texas Instruments, in a SOIC-8. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 VCC1 power_in Side-1 power supply. Recommended operating range 1.71-1.89 V or 2.25-5.5 V (with respect to GND1). Bypass locally with a 0.1 µF ceramic capacitor to GND1.
2 OUTA output Isolated push-pull logic output for channel A (referenced to side-1, VCC1/GND1). Drives up to ±4 mA at 5 V VCC. Follows INA (crossing the isolation barrier). ISO6721FB variant defaults LOW when the input signal or side-2 power is lost.
3 INB input Logic input for channel B (referenced to side-1, VCC1/GND1). VIH ≥ 0.7 × VCC1, VIL ≤ 0.3 × VCC1. CMOS-compatible.
4 GND1 power_in Side-1 ground reference for VCC1, INB, and OUTA.
5 GND2 power_in Side-2 ground reference for VCC2, INA, and OUTB. Isolated from GND1 through the capacitive SiO2 barrier.
6 OUTB output Isolated push-pull logic output for channel B (referenced to side-2, VCC2/GND2). Drives up to ±4 mA at 5 V VCC. Follows INB (crossing the isolation barrier). ISO6721FB variant defaults LOW when the input signal or side-1 power is lost.
7 INA input Logic input for channel A (referenced to side-2, VCC2/GND2). VIH ≥ 0.7 × VCC2, VIL ≤ 0.3 × VCC2. CMOS-compatible.
8 VCC2 power_in Side-2 power supply. Recommended operating range 1.71-1.89 V or 2.25-5.5 V (with respect to GND2). VCC2 can be set independently of VCC1. Bypass locally with a 0.1 µF ceramic capacitor to GND2.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

  • ISO6721BDR
  • ISO6721BD
  • ISO6721FBDR
  • ISO6721RBDR
  • ISO6721RBD
  • ISO6721RFBDR
  • ISO6721RFBD
  • ISO6720BDR
  • ISO6720BD
  • ISO6720FBDR
  • ISO6720FBD

CAD (KiCad official)

  • Symbol: ISO6721FBDR
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOIC-8 (KiCad packages3D, STEP)

Provenance

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

  • Datasheet: Texas Instruments datasheet (48 pp, sha256 342ebe8d7d5e069e, retrieved 2026-08-17, 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: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF