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ISO1640BDR

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by Ray

Texas Instruments I2C Isolators, SOIC-8. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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Datasheet

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Contents

README

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ISO1640BDR

Texas Instruments · I2C Isolators · SOIC-8

ISO1640BDR 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 Supply voltage, side 1. Operating range 3 V to 5.5 V. Requires local decoupling capacitor to GND1.
2 SDA1 bidirectional Serial data input / output, side 1. Open-drain bidirectional I2C data line; requires external pull-up to VCC1. Sink current up to 3.5 mA.
3 SCL1 bidirectional Serial clock, side 1. Bidirectional (input/output) on ISO1640; input only on ISO1641. Open-drain, requires external pull-up to VCC1.
4 GND1 power_in Ground reference for side 1. Isolated from GND2 by the SiO2 capacitive barrier.
5 GND2 power_in Ground reference for side 2. Isolated from GND1 by the SiO2 capacitive barrier.
6 SCL2 bidirectional Serial clock, side 2. Bidirectional (input/output) on ISO1640; output only on ISO1641 (unidirectional clock forwarding). Open-drain, requires external pull-up to VCC2. Sink current up to 50 mA on side-2 outputs.
7 SDA2 bidirectional Serial data input / output, side 2. Open-drain bidirectional I2C data line; requires external pull-up to VCC2. Sink current up to 50 mA.
8 VCC2 power_in Supply voltage, side 2. Operating range 2.25 V to 5.5 V. Requires local decoupling 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.

  • ISO1640BDR
  • ISO1641BDR
  • ISO1641BD
  • ISO1640DW
  • ISO1640DWR

CAD (KiCad official)

  • Symbol: ISO1640BDR
  • 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 (49 pp, sha256 1d0da3be1a05f511, 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