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ISO7721FQDWRQ1

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Texas Instruments Digital Isolators, SOIC-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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ISO7721FQDWRQ1

Texas Instruments · Digital Isolators · SOIC-16

ISO7721FQDWRQ1 from Texas Instruments, in a SOIC-16. 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 GND1 power_in Ground connection for VCC1 on the input side; decouple VCC1 to GND1 with 0.1 µF as recommended by the datasheet.
2 NC unconnected Not connected per the DW-16 pin table; no function on this device.
3 VCC1 power_in Input-side supply voltage, recommended 2.25 V to 5.5 V, set independently of VCC2; place a 0.1 µF decoupling capacitor between VCC1 and GND1.
4 OUTA output Channel A output on the input-side reference (reverse-direction channel driven from INA, pin 13); on F-suffix devices it defaults low when the input side is unpowered or INA is open.
5 INB input Channel B logic input referenced to VCCI, with VIH at least 0.7 x VCCI and VIL at most 0.3 x VCCI, supporting up to 100 Mbps.
6 NC unconnected Not connected per the DW-16 pin table; no function on this device.
7 GND1 power_in Ground connection for VCC1 on the input side (second input-side ground pin on the DW-16 package).
8 NC unconnected Not connected per the DW-16 pin table; no function on this device.
9 GND2 power_in Ground connection for VCC2 on the output side; decouple VCC2 to GND2 with 0.1 µF.
10 NC unconnected Not connected per the DW-16 pin table; no function on this device.
11 NC unconnected Not connected per the DW-16 pin table; no function on this device.
12 OUTB output Channel B output referenced to VCCO; VOH is at least VCCO - 0.4 V at 5 V with IOH = -4 mA, and the F-suffix device defaults low when the input is unpowered or open.
13 INA input Channel A logic input (reverse-direction channel) on the output-side reference, with VIH at least 0.7 x VCCI and VIL at most 0.3 x VCCI, supporting up to 100 Mbps.
14 VCC2 power_in Output-side supply voltage, recommended 2.25 V to 5.5 V, set independently of VCC1; place a 0.1 µF decoupling capacitor between VCC2 and GND2.
15 NC unconnected Not connected per the DW-16 pin table; no function on this device.
16 GND2 power_in Ground connection for VCC2 on the output side (second output-side ground pin on the DW-16 package).

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package SOIC-16
Category Signal Isolation Devices
Pins 16

CAD (KiCad official)

  • Symbol: ISO7721FQDWRQ1
  • Footprint: Package_SO:SOIC-16_3.9x9.9mm_P1.27mm
  • 3D model: SOIC-16 (KiCad packages3D, STEP)
  • 3D model files: iso7721fqdwrq1-etched.step / iso7721fqdwrq1-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); iso7721fqdwrq1.step / iso7721fqdwrq1.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (52 pp, sha256 fbb553de6ff2b6fe, 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