Specifications
| Type | Description |
|---|---|
| Part Number | ISO1641 |
| Manufacturer | Texas Instruments |
| Product Type | Operational Amplifier |
| Category | Signal Chain |
| Package Case | SOIC-8 (D): 4.90 mm x 3.91 mm; SOIC-16 (DW): 10.30 mm x 7.50 mm |
| Communication Type | Bidirectional SDA and unidirectional SCL |
| I2C Data Rate | Up to 1.7 MHz |
| Side 1 Supply Voltage | 3 V to 5.5 V |
| Side 2 Supply Voltage | 2.25 V to 5.5 V |
| Side 1 Open-Drain Sink Current | 3.5 mA |
| Side 2 Open-Drain Sink Current | 50 mA |
| Side 1 Maximum Capacitive Load | 80 pF |
| Side 2 Maximum Capacitive Load | 400 pF |
| Operating Temperature Range | -40°C to +125°C |
| Common-Mode Transient Immunity | ±100 kV/µs typical |
| IEC ESD Contact Discharge Across Isolation Barrier | ±8 kV |
| Same-Side Unpowered IEC ESD | ±8 kV |
| ISO1641BD Protection Level | Basic |
| ISO1641DW Protection Level | Reinforced |
| ISO1641BD Surge Test Voltage | 6500 VPK |
| ISO1641DW Surge Test Voltage | 10000 VPK |
| ISO1641BD Isolation Rating | 3000 VRMS |
| ISO1641DW Isolation Rating | 5000 VRMS |
| ISO1641BD Working Voltage | 450 VRMS / 637 VPK |
| ISO1641DW Working Voltage | 1500 VRMS / 2121 VPK |
| Supply Voltage Absolute Maximum | -0.5 V to 6 V |
| SDA1/SCL1 Input-Output Voltage Absolute Maximum | -0.5 V to VCCX + 0.5 V |
| SDA2/SCL2 Input-Output Voltage Absolute Maximum | -0.5 V to VCCX + 0.5 V |
| Hot-Swap Bus Pin Voltage | 0 V < SDAx, SCLx < 6 V |
| SDA1/SCL1 Input-Output Current Absolute Maximum | 0 mA to 20 mA |
| SDA2/SCL2 Input-Output Current Absolute Maximum | 0 mA to 100 mA |
| Maximum Junction Temperature | 150°C |
| Storage Temperature | -65°C to 150°C |
| All-Pins HBM ESD Rating | ±6000 V |
| ISO1641 Side 1 Bus Pin HBM ESD Rating | ±10000 V |
| ISO1641 Side 2 Bus Pin HBM ESD Rating | ±14000 V |
| CDM ESD Rating | ±1500 V |
| Isolation Barrier IEC ESD Withstand | ±8000 V |
| Datasheet Status | request_only |
Product Overview
The ISO1641 is a Texas Instruments I2C digital isolator in the Signal_Chain category. It provides bidirectional SDA communication and unidirectional SCL communication, with bidirectional data transfer specified up to 1.7 MHz. The recommended supply range is 3 V to 5.5 V on Side 1 and 2.25 V to 5.5 V on Side 2.
Package options include SOIC-8 (D), measuring 4.90 mm x 3.91 mm, and SOIC-16 (DW), measuring 10.30 mm x 7.50 mm. The SOIC-8 ISO1641BD option is specified for basic protection, 6500 VPK surge test voltage, 3000 VRMS UL 1577 isolation rating, and 450 VRMS / 637 VPK working voltage. The SOIC-16 ISO1641DW option is specified for reinforced protection, 10000 VPK surge test voltage, 5000 VRMS UL 1577 isolation rating, and 1500 VRMS / 2121 VPK working voltage.
Bus-interface parameters include 3.5 mA Side 1 open-drain sink current, 50 mA Side 2 open-drain sink current, 80 pF Side 1 capacitive load, and 400 pF Side 2 capacitive load. The device is specified over a -40°C to +125°C free-air operating temperature range.
Key Features
- Bidirectional SDA with unidirectional SCL communication
- Bidirectional I2C data transfer up to 1.7 MHz
- Side 1 supply range from 3 V to 5.5 V
- Side 2 supply range from 2.25 V to 5.5 V
- Side 1 open-drain sink current of 3.5 mA
- Side 2 open-drain sink current of 50 mA
- Side 1 bus capacitive load up to 80 pF
- Side 2 bus capacitive load up to 400 pF
- Typical CMTI rating of ±100 kV/µs
- Basic and reinforced isolation package options
Typical Applications
- Isolated I2C bus interfaces
- Bidirectional SDA isolation
- Unidirectional SCL isolation
- Hot-swap bus pin designs
- Basic isolation bus designs
- Reinforced isolation bus designs
- High-CMTI I2C links
Procurement Notes
When requesting a quote for ISO1641, buyers should confirm the manufacturer, package or case, required quantity, target date code, compliance documents, packing method, destination country and expected delivery schedule.
If alternatives are acceptable, buyers should share the approved vendor list, required electrical or optical limits, package constraints and qualification requirements. Any alternative part should be reviewed by the buyer's engineering team before production use.
For analog and signal-chain sourcing, supply voltage, bandwidth, accuracy, noise level, package, temperature grade, input/output configuration and qualification requirements should be verified before approval.
FAQ
What communication configuration does ISO1641 support?
ISO1641 supports bidirectional SDA communication and unidirectional SCL communication. The extracted data specifies bidirectional data transfer up to 1.7 MHz for the I2C interface.
What supply voltage ranges are specified for ISO1641?
The recommended Side 1 supply range is 3 V to 5.5 V. The recommended Side 2 supply range is 2.25 V to 5.5 V.
How do the ISO1641BD and ISO1641DW isolation options differ?
ISO1641BD in the SOIC-8 D package provides basic protection with a 3000 VRMS UL 1577 isolation rating. ISO1641DW in the SOIC-16 DW package provides reinforced protection with a 5000 VRMS UL 1577 isolation rating.
Technical Review & Sourcing Note
Prepared by LDeepAI Component Sourcing Team. Reviewed for RFQ, documentation and alternative sourcing use. Last updated: July 20, 2026.
This page is based on manufacturer datasheet information and LDeepAI sourcing review. Specifications should be verified against the official manufacturer datasheet before final procurement or design approval. Final electrical, optical and reliability approval should be confirmed by the buyer's engineering team.