Key Selection Information
| Selection Parameter | Confirmed Information |
|---|---|
| Supply | 3.3 V |
| Data rate | 10 Mbps |
| Duplex | Half duplex |
| 5 V logic compatibility | Interoperable with 5 V logic |
| Bus nodes | Up to 32 |
| Common-mode range | −7 V to +12 V |
| Package | 8-lead SOIC_N, R-8 |
| Operating temperature | −40°C to +85°C |
Product Overview
ADM3485ARZ-REEL7 is a 3.3 V low-power half-duplex RS-485/RS-422 transceiver for two-wire differential buses. The ADM3485 variant supports up to 10 Mbps and provides separate driver and receiver enable controls.
This part must not be conflated with ADM3485E. The non-E ADM3485 is specified at 10 Mbps; the E-suffixed family has different published speed and ESD characteristics. Exact suffix recognition is therefore important during replacement qualification.
Key Features
- 3.3 V half-duplex RS-485/RS-422 physical layer.
- 10 Mbps data-rate capability.
- Up to 32 transceivers on the bus.
- −7 V to +12 V bus common-mode range.
Functional Highlights
The 3.3 V supply and 5 V logic interoperability can simplify mixed-voltage logic domains, but bus common-mode limits still need system-level verification.
Do not transfer the ADM3485E ±15 kV ESD and 12 Mbps specifications to this non-E exact part.
Application Fit
- Low-power RS-485/RS-422 interfaces.
- Telecommunications serial links.
- Industrial process-control networks.
- HVAC control communication.
Design Considerations
- Terminate the bus for the selected cable impedance and limit stubs for 10 Mbps operation.
- Manage DE and /RE timing during half-duplex direction changes.
- Check common-mode range against expected ground offsets.
- Use ADM3485 exact-family values rather than ADM3485E values.
Product Status
Manufacturer status: PRODUCTION
Analog Devices currently lists ADM3485ARZ-REEL7 as PRODUCTION.
Related Engineering Resources
Alternative Candidates for Engineering Evaluation
| MPN | Manufacturer | Package |
|---|---|---|
| ADM3485ARZ | ADI | SOIC-8 |
| MAX3485ESA+ | MAXIM | SO-8 |
| ISL43485IBZ-T | RENESAS | SOIC-8 |
| GM3485E | GATEMODE | SOP-8 |
| MAX3485ESA+T | MAXIM | SOIC-8 |
| ADM3485EARZ-REEL7 | ADI | SOIC-8 |
| ISL83485IBZ-T | RENESAS | SOIC-8 |
| HG3485EIM/TR | HGSEMI | SOP-8 |
| ADM3485EARZ | ADI | SOIC-8 |
| ADM3485EARZ-REEL | ADI | SOIC-8 |
| MAX3485AEASA+T | MAXIM | SO-8 |
| MAX3485AEASA+ | MAXIM | SOIC-8 |
| ISL43485IBZ | RENESAS | SOIC-8 |
Candidate alternative parts require engineering verification before substitution. Electrical characteristics, pinout, package, qualification, and application requirements should be verified before use.
Quality & Verification Support
Third-party inspection or testing can be arranged according to customer requirements. Testing fees are borne by the buyer. Additional verification requirements can be discussed before shipment. After an order is placed, physical product, label, packaging, and Date Code photos may be provided where appropriate.
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To request a quotation, provide the exact manufacturer part number, required quantity, destination, target Date Code if applicable, and any testing or inspection requirements.
