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MAX3485ESA Equivalent & Substitute Parts
Part Overview
The MAX3485ESA is a half-duplex RS422/RS485 transceiver interface IC manufactured by Analog Devices Inc./Maxim Integrated in an 8-SOIC surface mount package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The device operates at 3V to 3.6V supply voltage with a 10 Mbps data rate and supports industrial temperature ranges from -40°C to 85°C.
Substiute Parts
Key Parameters
| Parameter | Specification |
|---|---|
| Manufacturer Part Number | MAX3485ESA |
| Manufacturer | Analog Devices Inc./Maxim Integrated |
| Category | Interface |
| Type | Transceiver |
| Protocol | RS422, RS485 |
| Number of Drivers/Receivers | 1/1 |
| Duplex | Half |
| Receiver Hysteresis | 50 mV |
| Data Rate | 10 Mbps |
| Voltage - Supply | 3V ~ 3.6V |
| Operating Temperature | -40°C ~ 85°C |
| Mounting Type | Surface Mount |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| Product Status | Obsolete |
Substitute Part Grouping Explanation
Substitution for the MAX3485ESA is determined by strict adherence to the following electrical and mechanical parameters:
Critical Parameters for Substitution:
- Protocol: RS422/RS485 half-duplex transceiver
- Number of Drivers/Receivers: 1/1 configuration
- Duplex Mode: Half-duplex operation
- Receiver Hysteresis: 50 mV
- Supply Voltage Range: 3V ~ 3.6V
- Operating Temperature Range: -40°C ~ 85°C
- Package Type: 8-SOIC surface mount
- RoHS3 Compliance and MSL Level 1
Data Rate Consideration: The MAX3485ESA operates at 10 Mbps. Substitute parts are grouped into two categories based on data rate capability:
-
Full-Rate Equivalents (10 Mbps): Parts maintaining the 10 Mbps specification are direct parametric equivalents suitable for direct replacement without application redesign.
-
Reduced-Rate Alternatives (250 kbps, 2.5 Mbps): Parts with lower data rates are functional substitutes only when application bandwidth requirements do not exceed the specified data rate of the substitute part.
Parameter Comparison
| Part Number | Manufacturer | Product Status | Data Rate | Supply Voltage | Operating Temperature | Package | Packaging Type |
|---|---|---|---|---|---|---|---|
| MAX3485ESA | Analog Devices Inc./Maxim Integrated | Obsolete | 10 Mbps | 3V ~ 3.6V | -40°C ~ 85°C | 8-SOIC | Standard |
| MAX3485ESA+ | Analog Devices Inc./Maxim Integrated | Active | 10 Mbps | 3V ~ 3.6V | -40°C ~ 85°C | 8-SOIC | Tube |
| ADM3485ARZ-REEL7 | Analog Devices Inc. | Active | 10 Mbps | 3V ~ 3.6V | -40°C ~ 85°C | 8-SOIC | Cut Tape (CT) & Digi-Reel® |
| ADM3485EARZ-REEL | Analog Devices Inc. | Active | 10 Mbps | 3V ~ 3.6V | -40°C ~ 85°C | 8-SOIC | Cut Tape (CT) & Digi-Reel® |
| ADM3485EARZ-REEL7 | Analog Devices Inc. | Active | 10 Mbps | 3V ~ 3.6V | -40°C ~ 85°C | 8-SOIC | Cut Tape (CT) & Digi-Reel® |
| ADM3483ARZ | Analog Devices Inc. | Active | 250 kbps | 3V ~ 3.6V | -40°C ~ 85°C | 8-SOIC | Tube |
| ADM3483ARZ-REEL7 | Analog Devices Inc. | Active | 250 kbps | 3V ~ 3.6V | -40°C ~ 85°C | 8-SOIC | Cut Tape (CT) & Digi-Reel® |
| ADM3483EARZ | Analog Devices Inc. | Active | 250 kbps | 3V ~ 3.6V | -40°C ~ 85°C | 8-SOIC | Tube |
| ADM3483EARZ-REEL7 | Analog Devices Inc. | Active | 250 kbps | 3V ~ 3.6V | -40°C ~ 85°C | 8-SOIC | Cut Tape (CT) & Digi-Reel® |
| ADM3486EARZ | Analog Devices Inc. | Active | 2.5 Mbps | 3V ~ 3.6V | -40°C ~ 85°C | 8-SOIC | Tube |
| ADM3486EARZ-REEL7 | Analog Devices Inc. | Active | 2.5 Mbps | 3V ~ 3.6V | -40°C ~ 85°C | 8-SOIC | Tape & Reel (TR) |
Engineering Selection Recommendations
Primary Substitutes (Active Status, Full 10 Mbps Capability):
The MAX3485ESA+ is the direct parametric equivalent with identical electrical specifications and active product status. The ADM3485 series (ADM3485ARZ-REEL7, ADM3485EARZ-REEL, ADM3485EARZ-REEL7) provides active alternatives from Analog Devices Inc. with matching 10 Mbps data rate capability and identical electrical parameters. These parts are suitable for direct replacement in applications requiring full 10 Mbps performance.
Secondary Substitutes (Active Status, Reduced Data Rate):
The ADM3483 series (ADM3483ARZ, ADM3483ARZ-REEL7, ADM3483EARZ, ADM3483EARZ-REEL7) operates at 250 kbps and the ADM3486 series (ADM3486EARZ, ADM3486EARZ-REEL7) operates at 2.5 Mbps. These parts maintain all other electrical and mechanical parameters but support lower data rates. Selection of reduced-rate alternatives requires verification that application bandwidth requirements do not exceed the substitute part's specified data rate.
Compliance and Certification:
All substitute parts maintain ROHS3 compliance, MSL Level 1 rating, and identical operating temperature specifications (-40°C to 85°C). All parts are manufactured by Analog Devices Inc. or its Maxim Integrated division, ensuring consistent quality and reliability standards.
Frequently Asked Questions (FAQ)
Q: Can MAX3485ESA be replaced with MAX3485ESA+?
A: Yes. The MAX3485ESA+ is a parametric equivalent with identical electrical specifications, supply voltage range, data rate, operating temperature, and package type. The primary difference is packaging format (Tube vs. standard) and active product status. This is a direct replacement.
Q: What is the difference between ADM3485 and ADM3483 series substitutes?
A: Both maintain identical supply voltage (3V ~ 3.6V), operating temperature (-40°C ~ 85°C), and 8-SOIC package specifications. The ADM3485 series supports 10 Mbps data rate, matching the MAX3485ESA specification. The ADM3483 series supports only 250 kbps. Selection depends on application bandwidth requirements.
Q: Are packaging variants (Tube, Cut Tape & Digi-Reel, Tape & Reel) electrically equivalent?
A: Yes. Packaging variants of the same part number (e.g., ADM3485EARZ-REEL vs. ADM3485EARZ-REEL7) contain identical die and electrical specifications. Packaging differences affect handling, storage, and assembly processes only. Electrical performance is unchanged.
Q: Can ADM3486EARZ (2.5 Mbps) substitute for MAX3485ESA (10 Mbps)?
A: ADM3486EARZ is a functional substitute only when application data rate requirements do not exceed 2.5 Mbps. All other electrical and mechanical parameters are identical. Applications requiring 10 Mbps performance must use full-rate equivalents (MAX3485ESA+, ADM3485 series).
Q: Why is MAX3485ESA classified as obsolete?
A: Obsolete status indicates the part is no longer manufactured. Active equivalents and substitutes from the same manufacturer ensure design continuity and supply chain reliability. Selection of active alternatives is recommended for new designs and ongoing production.
Q: Are all substitute parts RoHS3 compliant?
A: Yes. All listed substitute parts maintain ROHS3 compliance and MSL Level 1 rating, matching the original MAX3485ESA specifications.
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