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ISO1641BDR
Public Unreviewedby Ray
Texas Instruments I2C Isolators, SOIC-8. Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownISO1641BDR
Texas Instruments · I2C Isolators · SOIC-8
ISO1641BDR 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 for side 1. Recommended operating range 3.0 V to 5.5 V. Bypass to GND1 with a low-ESR ceramic capacitor placed close to the pin. |
| 2 | SDA1 | bidirectional | Serial data input/output for side 1. Open-drain, bidirectional I2C data line referenced to GND1/VCC1. Sink capability 3.5 mA (matched to standard I2C). |
| 3 | SCL1 | input | Serial clock input for side 1 (ISO1641 unidirectional clock channel). Accepts I2C clock from the host controller on side 1 and drives the isolated SCL2 output on side 2. |
| 4 | GND1 | power_in | Ground reference for side 1. All Side-1 signals and VCC1 bypassing are referenced to this pin. |
| 5 | GND2 | power_in | Ground reference for side 2. Isolated from GND1 across the SiO2 dielectric barrier. |
| 6 | SCL2 | output | Serial clock output for side 2 (ISO1641 unidirectional clock channel). Open-drain output that mirrors SCL1 across the isolation barrier. Sink capability up to 50 mA (side-2 bus). |
| 7 | SDA2 | bidirectional | Serial data input/output for side 2. Open-drain, bidirectional I2C data line referenced to GND2/VCC2. Higher drive/sink capability (up to 50 mA) versus SDA1. |
| 8 | VCC2 | power_in | Supply voltage for side 2. Recommended operating range 2.25 V to 5.5 V. Bypass to GND2 with a low-ESR ceramic capacitor placed close to the pin. |
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.
ISO1641BDR
CAD (KiCad official)
- Symbol:
ISO1641BDR - 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
030beb20def01d69, 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).