Texas Instruments
Reinforced 5 kVrms quad digital isolator, 3 forward / 1 reverse, 100 Mbps, default-low output, SOIC-16 wide body
The Texas Instruments ISO7741FDWR is a reinforced four-channel digital isolator with three forward and one reverse channel, rated 5000 Vrms (UL 1577) in the wide-body SOIC-16 package. It runs up to 100 Mbps from 2.25 V to 5.5 V supplies with ±100 kV/µs typical CMTI. The F suffix sets the default output low when the input side loses power. It is used to isolate SPI, RS-485, RS-232 and CAN interfaces in industrial automation, motor drives, power supplies and medical equipment. Lead times are extended; Cerametronics helps buyers locate traceable stock.
Key Specifications
Verify against the original datasheet before quoting.
| Channels | 4 channels: 3 forward, 1 reverse |
|---|---|
| Isolation Rating | Reinforced; 5000 Vrms (UL 1577, DW package); surge up to 12.8 kV |
| Data Rate / CMTI | 100 Mbps max; ±100 kV/µs typ CMTI |
| Supply Voltage | 2.25 V to 5.5 V on each side |
| Default Output | Low (F suffix); devices without F default high |
| Temperature / Package | -55 to +125 °C; SOIC-16 wide body (DW), 10.3 x 10.3 mm, tape and reel |
Market Status
Allocated – Limited Market Stock Factory lead time is currently around 26 weeks.
Quality & Traceability
Cerametronics is ISO 9001 certified and products are RoHS compliant, with counterfeit screening and full traceability on every shipment. A Certificate of Conformance is available on request. For allocation-sensitive or high-risk lots, independent third-party lab verification can be arranged — just flag it on your RFQ. Any lot that fails incoming inspection is quarantined and never shipped.
FAQ
Can ISO7741DWR replace ISO7741FDWR?
Same pinout and isolation rating, but the default output state differs: the F version outputs low and the non-F version outputs high when the input is unpowered. Check the fail-safe requirement of the design before swapping.
Is there a newer alternative?
TI lists the ISO6441 as a drop-in upgrade with higher CMTI and data rate. Confirm the F (default-low) variant is available for the same fail-safe behaviour.
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