Procurement Snapshot
| Procurement Field | Value |
|---|---|
| Exact MPN | ADUM1255ASA+ |
| Manufacturer | Analog Devices |
| Package | SOIC-8 |
| Availability | Contact for current stock and lead time |
| Datasheet | Verified PDF |
Key Selection Information
| Selection Parameter | Confirmed Information |
|---|---|
| Voltage – Supply | 2.25V~5.5V |
| CMTI(kV/us) | 100kV/us |
| Isolation Voltage(Vrms) | 3000 |
| Peak Output Current(sink) | 5mA;50mA |
| Clock Direction | Unidirectional |
| Features | Open-drain buffer output; Multi-voltage domain interface; Hotswap |
| Operating Temperature | -40℃~+125℃ |
| Manufacturer-confirmed feature | Bidirectional I²C data transfer up to 2 MHz SCL |
Product Overview
ADUM1255ASA+ is an I²C Isolator with Unidirectional SCL, Idle-Bus Hotswap and Low VOL from Analog Devices. The exact order code is preserved for BOM, RFQ and incoming-inspection control. The verified package for this listing is SOIC-8. Engineering selection should be based on the exact manufacturer part number, interface requirements, isolation needs and package.

Application Fit
- Isolated I²C/SMBus control links
- Hot-swappable isolated sensor and peripheral buses
- Mixed-voltage industrial control interfaces
Design Considerations
- Verify pull-up resistors and bus capacitance against the required I²C clock rate.
- Confirm VDD1/VDD2 logic domains and SCL direction match the target bus architecture.
- Maintain isolation creepage/clearance and follow the manufacturer layout guidance.
Alternative Candidates
| MPN | Manufacturer | Package |
|---|---|---|
| CMT8101WH | HopeRF Micro-electronics | SOW-8WB |
| CA-IS3021S | Chipanalog | SOIC-8 |
These candidates are listed by LCSC. Verify electrical characteristics, pinout, package, qualification and application requirements before substitution.
Quality & RFQ Support
For quotation or inspection requirements, provide the exact MPN, quantity, destination, target Date Code if applicable, and any requested third-party testing before shipment.






