FIF485
Full-Way
Needs validationmedium risk
FIF485 is a strong 5V RS-485 candidate, pending pinout and temperature review.
Best Alternatives to RS485
RS485 is a 5V half-duplex RS-485/RS-422 transceiver in SOP-8. Best candidates must match supply, package, pinout and bus function.
AI replacement insight
Electrical riskhigh
3.3V parts do not match a 5V rail.
Package risklow
Kept parts list SOP-8 and 8 pins.
Firmware risklow
Same RS-485/RS-422 protocol role.
Sourcing riskmedium
Lifecycle and maker data vary by source.
Can it be replaced directly?
No pin-compatible replacement is verified from the provided fields.
Best replacement path
Start with FIF485, then verify SOP-8 pinout, temperature and protection details.
Main risk
Pinout is missing and several candidates have 3.3V-only supplies.
Recommended alternatives
4Alternative comparison matrix
| Feature / factor | RS485 | FIF485 | MAX3485ESA | SIT3485ESA | Compatibility / risk |
|---|---|---|---|---|---|
| Package | SOP-8, 8 | SOP-8, 8 | SOP-8, 8 | SOP-8, 8 | SOP-8, 8 — same body count; MAX3485ESA: same package; SIT3485ESA: same package; SP3485EEN: same package |
| Pinout | RS485 SOP-8 | not shown | not shown | not shown | not shown — must verify pins; MAX3485ESA: must verify; SIT3485ESA: must verify; SP3485EEN: must verify |
| Voltage | 5 V | 4.5-5.5 V | 3.0-5.5V or 3.3V | 3.0-3.6 V | 4.5-5.5 V / 3.0-5.5V or 3.3V / 3.0-3.6 V — 5V rail OK; MAX3485ESA: conflicting data; SIT3485ESA: not 5V supply; SP3485EEN: needs 3.3V rail |
| Interface | RS485/422 half, 2.5Mbps | RS485/422 half, 10Mbps | RS485/422 half, 10Mbps | RS485/422 half, 12Mbps | RS485/422 half, 10Mbps / RS485/422 half, 12Mbps — faster rate; MAX3485ESA: rate OK if supply OK; SIT3485ESA: rate margin; SP3485EEN: faster data rate |
| Temperature | -40 to 85C | not shown | -40 to 125C | -40 to 85C | not shown / -40 to 125C / -40 to 85C — needs rating; MAX3485ESA: ES source only; SIT3485ESA: range matches; SP3485EEN: range matches |
Application & sourcing insights
Questions & answers
FIF485 is the closest kept candidate because it is a 5V half-duplex RS-485 part in SOP-8.