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SP490ECN-L/TR RS422/RS485 Transceiver Equivalent & Substitute Parts
Part Overview
The SP490ECN-L/TR is a full-duplex RS422/RS485 transceiver manufactured by MaxLinear, Inc., supplied in 8-SOIC surface mount packaging with tape and reel (TR) delivery. This interface IC operates at 4.75V to 5.25V supply voltage and supports data rates up to 10 Mbps across industrial and commercial communication applications. The part is currently active in production status with RoHS compliance and unlimited moisture sensitivity rating (MSL 1).
Equivalent and substitute parts are identified based on matching functional protocol (RS422/RS485), transceiver configuration (1/1 full-duplex), package type (8-SOIC), and electrical operating parameters. Substitutes may vary in supply voltage range, operating temperature range, data rate capability, and receiver hysteresis specifications.
Substiute Parts
Key Parameters
| Parameter | SP490ECN-L/TR Value |
|---|---|
| Manufacturer | MaxLinear, Inc. |
| Protocol | RS422, RS485 |
| Type | Transceiver |
| Number of Drivers/Receivers | 1/1 |
| Duplex | Full |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) |
| Mounting Type | Surface Mount |
| Voltage - Supply | 4.75V ~ 5.25V |
| Data Rate | 10 Mbps |
| Receiver Hysteresis | 70 mV |
| Operating Temperature | 0°C ~ 70°C |
| RoHS Status | RoHS Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitute parts are grouped based on electrical compatibility within the following criteria:
Primary Compatibility Criteria:
- Protocol: RS422/RS485 full-duplex transceiver
- Configuration: 1/1 drivers/receivers
- Package: 8-SOIC surface mount
- Supply voltage overlap with SP490ECN-L/TR (4.75V ~ 5.25V)
Secondary Variation Parameters:
- Receiver hysteresis (30 mV to 70 mV)
- Data rate capability (5 Mbps to 16 Mbps)
- Operating temperature range (-40°C to +85°C vs. 0°C to +70°C)
- Packaging format (Tube, Tape & Reel, Cut Tape & Digi-Reel)
Substitutes are divided into two functional groups:
Group A: 5V Supply Voltage Compatible — ADM1490EBRZ, ADM1490EBRZ-REEL7, ISL8490EIBZ, ISL8490EIBZ-T. These parts operate within or overlap the 4.75V ~ 5.25V supply range of the SP490ECN-L/TR.
Group B: 3V Supply Voltage Range — ADM3490ARZ, ADM3490ARZ-REEL7, ADM3490EARZ-REEL7, ISL83490IBZ, ISL83490IBZ-T. These parts operate at 3V ~ 3.6V supply voltage and are not directly substitutable without circuit redesign.
Group C: Extended Supply Range — ISL8490IBZ operates at 4.5V ~ 5.5V, providing broader supply tolerance than the original part.
Parameter Comparison
| Part Number | Manufacturer | Protocol | Drivers/Receivers | Package | Supply Voltage | Data Rate | Receiver Hysteresis | Operating Temp | RoHS Status | Packaging Format |
|---|---|---|---|---|---|---|---|---|---|---|
| SP490ECN-L/TR | MaxLinear, Inc. | RS422, RS485 | 1/1 | 8-SOIC | 4.75V ~ 5.25V | 10 Mbps | 70 mV | 0°C ~ 70°C | RoHS Compliant | Tape & Reel (TR) |
| ADM1490EBRZ | Analog Devices Inc. | RS422, RS485 | 1/1 | 8-SOIC | 4.75V ~ 5.25V | 16 Mbps | 30 mV | -40°C ~ 85°C | ROHS3 Compliant | Tube |
| ADM1490EBRZ-REEL7 | Analog Devices Inc. | RS422, RS485 | 1/1 | 8-SOIC | 4.75V ~ 5.25V | 16 Mbps | 30 mV | -40°C ~ 85°C | ROHS3 Compliant | Tape & Reel (TR) |
| ADM3490ARZ | Analog Devices Inc. | RS422, RS485 | 1/1 | 8-SOIC | 3V ~ 3.6V | 10 Mbps | 50 mV | -40°C ~ 85°C | ROHS3 Compliant | Tube |
| ADM3490ARZ-REEL7 | Analog Devices Inc. | RS422, RS485 | 1/1 | 8-SOIC | 3V ~ 3.6V | 10 Mbps | 50 mV | -40°C ~ 85°C | ROHS3 Compliant | Cut Tape (CT) & Digi-Reel® |
| ADM3490EARZ-REEL7 | Analog Devices Inc. | RS422, RS485 | 1/1 | 8-SOIC | 3V ~ 3.6V | 10 Mbps | 50 mV | -40°C ~ 85°C | ROHS3 Compliant | Cut Tape (CT) & Digi-Reel® |
| ISL83490IBZ | Renesas Electronics Corporation | RS422, RS485 | 1/1 | 8-SOIC | 3V ~ 3.6V | 10 Mbps | 50 mV | -40°C ~ 85°C | ROHS3 Compliant | Tube |
| ISL83490IBZ-T | Renesas Electronics Corporation | RS422, RS485 | 1/1 | 8-SOIC | 3V ~ 3.6V | 10 Mbps | 50 mV | -40°C ~ 85°C | ROHS3 Compliant | Cut Tape (CT) & Digi-Reel® |
| ISL8490EIBZ | Renesas Electronics Corporation | RS422, RS485 | 1/1 | 8-SOIC | 4.5V ~ 5.5V | 10 Mbps | 70 mV | -40°C ~ 85°C | ROHS3 Compliant | Tube |
| ISL8490EIBZ-T | Renesas Electronics Corporation | RS422, RS485 | 1/1 | 8-SOIC | 4.5V ~ 5.5V | 10 Mbps | 70 mV | -40°C ~ 85°C | ROHS3 Compliant | Tape & Reel (TR) |
| ISL8490IBZ | Renesas Electronics Corporation | RS422, RS485 | 1/1 | 8-SOIC | 4.5V ~ 5.5V | 5 Mbps | 70 mV | -40°C ~ 85°C | ROHS3 Compliant | Tube |
Engineering Selection Recommendations
Direct Substitutes (5V Supply Voltage Group):
ADM1490EBRZ-REEL7 and ISL8490EIBZ-T are the closest functional equivalents to SP490ECN-L/TR. Both maintain the 4.75V ~ 5.25V (or overlapping 4.5V ~ 5.5V) supply voltage requirement, 8-SOIC package, and full-duplex RS422/RS485 protocol. ADM1490EBRZ-REEL7 offers higher data rate capability (16 Mbps vs. 10 Mbps) and extended operating temperature range (-40°C ~ 85°C vs. 0°C ~ 70°C). ISL8490EIBZ-T matches the receiver hysteresis (70 mV) and data rate (10 Mbps) of the original part while providing extended temperature range and ROHS3 compliance.
Packaging Consideration:
SP490ECN-L/TR is supplied in Tape & Reel (TR) format. Direct packaging equivalents in TR format are ADM1490EBRZ-REEL7 and ISL8490EIBZ-T. Tube-packaged alternatives (ADM1490EBRZ, ISL8490EIBZ) require different handling and storage procedures.
Supply Voltage Constraint:
Parts in the 3V ~ 3.6V supply voltage group (ADM3490 series, ISL83490 series) are not substitutable without circuit redesign, as they operate outside the 4.75V ~ 5.25V supply range of the SP490ECN-L/TR.
Product Status and Compliance:
All listed substitute parts are active in production status with ROHS3 compliance certification, ensuring long-term availability and regulatory alignment.
Frequently Asked Questions (FAQ)
Q: Can I use ADM3490ARZ-REEL7 as a direct replacement for SP490ECN-L/TR?
A: No. ADM3490ARZ-REEL7 operates at 3V ~ 3.6V supply voltage, while SP490ECN-L/TR requires 4.75V ~ 5.25V. Direct substitution would require circuit redesign to accommodate the lower supply voltage.
Q: What is the difference between ADM1490EBRZ and ADM1490EBRZ-REEL7?
A: Both parts are electrically identical. The difference is packaging format: ADM1490EBRZ is supplied in Tube format, while ADM1490EBRZ-REEL7 is supplied in Tape & Reel (TR) format. SP490ECN-L/TR uses TR packaging, making ADM1490EBRZ-REEL7 the packaging-matched equivalent.
Q: Does ISL8490EIBZ-T have the same receiver hysteresis as SP490ECN-L/TR?
A: Yes. Both SP490ECN-L/TR and ISL8490EIBZ-T have 70 mV receiver hysteresis. ADM1490EBRZ-REEL7 has lower hysteresis (30 mV), which may affect noise immunity in certain applications.
Q: Can I use ISL8490IBZ (5 Mbps version) instead of SP490ECN-L/TR (10 Mbps)?
A: ISL8490IBZ is rated for 5 Mbps maximum data rate, while SP490ECN-L/TR supports 10 Mbps. Substitution is only appropriate if your application operates at data rates below 5 Mbps.
Q: Are all substitute parts RoHS compliant?
A: Yes. SP490ECN-L/TR is RoHS Compliant, and all listed substitute parts are ROHS3 Compliant, meeting current environmental and regulatory requirements.
Q: What is the operating temperature range difference between SP490ECN-L/TR and its substitutes?
A: SP490ECN-L/TR operates from 0°C to 70°C. Most substitute parts (ADM1490, ADM3490, ISL83490, ISL8490 series) operate from -40°C to 85°C, providing extended temperature range capability. Selection depends on your application's thermal requirements.
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