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SP485REN-L Equivalent & Substitute Parts
Part Overview
The SP485REN-L is a half-duplex RS422/RS485 transceiver IC manufactured by MaxLinear, Inc., housed in an 8-SOIC surface mount package. This device is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. The SP485REN-L operates at 5V supply voltage with a 5 Mbps data rate and supports industrial temperature ranges from -40°C to 85°C.
Substiute Parts
Key Parameters
| Parameter | SP485REN-L |
|---|---|
| Manufacturer | MaxLinear, Inc. |
| Type | Transceiver Half Duplex |
| Protocol | RS422, RS485 |
| Number of Drivers/Receivers | 1/1 |
| Data Rate | 5 Mbps |
| Voltage Supply | 4.75V ~ 5.25V |
| Operating Temperature | -40°C ~ 85°C |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) |
| Mounting Type | Surface Mount |
| Product Status | Obsolete |
| Moisture Sensitivity Level | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution for the SP485REN-L is determined by the following critical parameters:
- Protocol Compatibility: RS422/RS485 half-duplex transceiver functionality
- Package Compatibility: 8-SOIC surface mount package (0.154", 3.90mm width)
- Driver/Receiver Configuration: 1/1 half-duplex architecture
- Supply Voltage Range: Must support or exceed the 4.75V ~ 5.25V operating range
- Operating Temperature Range: Must support -40°C ~ 85°C industrial temperature range
- Moisture Sensitivity: MSL 1 (Unlimited) classification
Substitute parts are grouped into two categories based on supply voltage compatibility:
Category A - 5V Supply Voltage (Direct Substitutes): ADM1485ARZ, ADM1485ARZ-REEL, ADM1485ARZ-REEL7, ADM1485JRZ, ADM1485JRZ-REEL. These devices operate at 4.75V ~ 5.25V, matching the original part's supply voltage specification.
Category B - 3V Supply Voltage (Functional Alternatives): ADM3485ARZ, ADM3485ARZ-REEL7, ADM3485EARZ, ADM3485EARZ-REEL, ADM3485EARZ-REEL7. These devices operate at 3V ~ 3.6V supply voltage and require voltage level consideration in system design.
Parameter Comparison
| Parameter | SP485REN-L | ADM1485ARZ | ADM1485ARZ-REEL | ADM1485ARZ-REEL7 | ADM1485JRZ | ADM1485JRZ-REEL | ADM3485ARZ | ADM3485ARZ-REEL7 | ADM3485EARZ | ADM3485EARZ-REEL | ADM3485EARZ-REEL7 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Type | Transceiver Half | Transceiver Half | Transceiver Half | Transceiver Half | Transceiver Half | Transceiver Half | Transceiver Half | Transceiver Half | Transceiver Half | Transceiver Half | Transceiver Half |
| Protocol | RS422, RS485 | RS422, RS485 | RS422, RS485 | RS422, RS485 | RS422, RS485 | RS422, RS485 | RS422, RS485 | RS422, RS485 | RS422, RS485 | RS422, RS485 | RS422, RS485 |
| Drivers/Receivers | 1/1 | 1/1 | 1/1 | 1/1 | 1/1 | 1/1 | 1/1 | 1/1 | 1/1 | 1/1 | 1/1 |
| Duplex | Half | Half | Half | Half | Half | Half | Half | Half | Half | Half | Half |
| Data Rate | 5 Mbps | 30 Mbps | 30 Mbps | 30 Mbps | 30 Mbps | 30 Mbps | 10 Mbps | 10 Mbps | 12 Mbps | 10 Mbps | 10 Mbps |
| Voltage Supply | 4.75V ~ 5.25V | 4.75V ~ 5.25V | 4.75V ~ 5.25V | 4.75V ~ 5.25V | 4.75V ~ 5.25V | 4.75V ~ 5.25V | 3V ~ 3.6V | 3V ~ 3.6V | 2.97V ~ 3.63V | 3V ~ 3.6V | 3V ~ 3.6V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C | 0°C ~ 70°C | 0°C ~ 70°C | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C |
| Package / Case | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| Product Status | Obsolete | Active | Active | Active | Active | Active | Active | Active | Active | Active | Active |
| Moisture Sensitivity Level | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| RoHS Status | Not specified | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
Engineering Selection Recommendations
For 5V System Designs: The ADM1485 series (ADM1485ARZ, ADM1485ARZ-REEL, ADM1485ARZ-REEL7) provides direct voltage compatibility with the SP485REN-L. These Analog Devices parts are active products with ROHS3 compliance and support the full -40°C ~ 85°C industrial temperature range. The ADM1485ARZ-REEL and ADM1485ARZ-REEL7 variants offer higher inventory availability (30,400 and 15,100 units respectively) in Cut Tape and Digi-Reel packaging formats.
For Industrial Temperature Range (-40°C ~ 85°C): Select from ADM1485ARZ, ADM1485ARZ-REEL, ADM1485ARZ-REEL7, ADM3485ARZ, ADM3485ARZ-REEL7, ADM3485EARZ, ADM3485EARZ-REEL, or ADM3485EARZ-REEL7. The ADM1485JRZ and ADM1485JRZ-REEL variants operate only at 0°C ~ 70°C and are not suitable for full industrial temperature applications.
For 3V Supply Voltage Systems: The ADM3485 series (ADM3485ARZ, ADM3485ARZ-REEL7, ADM3485EARZ, ADM3485EARZ-REEL, ADM3485EARZ-REEL7) operates at 3V ~ 3.6V supply voltage. These parts require system-level voltage compatibility assessment. ADM3485EARZ-REEL7 offers the highest inventory (50,200 units).
For Packaging and Availability: Tube packaging is available in ADM1485ARZ (19,566 units), ADM1485JRZ (16,500 units), and ADM3485ARZ (1,471 units). Cut Tape and Digi-Reel packaging provides higher inventory across multiple variants.
All substitute parts carry ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity classification, matching the environmental requirements of the original SP485REN-L.
Frequently Asked Questions (FAQ)
Q: Can ADM1485 parts directly replace SP485REN-L in existing designs?
A: Yes, ADM1485ARZ, ADM1485ARZ-REEL, and ADM1485ARZ-REEL7 are direct substitutes. They share identical supply voltage (4.75V ~ 5.25V), operating temperature range (-40°C ~ 85°C), package type (8-SOIC), and protocol support (RS422/RS485). Pin-to-pin compatibility and functional equivalence are maintained.
Q: What is the difference between ADM1485ARZ, ADM1485ARZ-REEL, and ADM1485ARZ-REEL7?
A: These are the same IC with different packaging and tape formats. ADM1485ARZ is supplied in Tube packaging. ADM1485ARZ-REEL and ADM1485ARZ-REEL7 are supplied in Cut Tape and Digi-Reel formats, differing in reel specifications. Electrical performance and functionality are identical.
Q: Can ADM3485 parts replace SP485REN-L?
A: ADM3485 parts are functional alternatives but operate at 3V ~ 3.6V supply voltage, not 5V. They are suitable only for systems designed for 3V operation. System-level voltage compatibility must be confirmed before substitution.
Q: Why do ADM1485JRZ and ADM1485JRZ-REEL have a narrower operating temperature range?
A: ADM1485JRZ variants operate at 0°C ~ 70°C, which is narrower than the SP485REN-L specification of -40°C ~ 85°C. These parts are not suitable for applications requiring full industrial temperature range operation.
Q: Are all substitute parts RoHS compliant?
A: Yes, all substitute parts listed carry ROHS3 compliance certification. The original SP485REN-L does not specify RoHS status.
Q: What is the significance of data rate differences between SP485REN-L (5 Mbps) and ADM1485 (30 Mbps)?
A: ADM1485 parts support higher data rates (30 Mbps) than the original SP485REN-L (5 Mbps). Higher data rate capability is backward compatible with lower-speed applications. System performance is not degraded by using a higher-rated transceiver in lower-speed designs.
Q: Which substitute part offers the best inventory availability?
A: ADM3485EARZ-REEL7 offers the highest inventory at 50,200 units. For 5V supply voltage applications, ADM1485ARZ-REEL provides 30,400 units.
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