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MAX3490ECSA-T Equivalent & Substitute Parts
Part Overview
The MAX3490ECSA-T is a 1/1 full-duplex RS422/RS485 transceiver IC manufactured by Analog Devices Inc./Maxim Integrated in 8-SOIC surface mount packaging. This part is classified as obsolete, which necessitates identification of equivalent and substitute components for ongoing design support and procurement. The MAX3490ECSA-T operates within a 3V to 3.6V supply voltage range with a 10Mbps data rate capability and 50mV receiver hysteresis, designed for industrial serial communication applications.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | MAX3490ECSA-T |
| Manufacturer | Analog Devices Inc./Maxim Integrated |
| Type | Transceiver |
| Protocol | RS422, RS485 |
| Number of Drivers/Receivers | 1/1 |
| Duplex | Full |
| Data Rate | 10Mbps |
| Voltage - Supply | 3V ~ 3.6V |
| Operating Temperature | 0°C ~ 70°C |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) |
| Receiver Hysteresis | 50 mV |
| Product Status | Obsolete |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution of the MAX3490ECSA-T is determined by strict equivalence across the following critical parameters:
- Protocol compatibility: RS422/RS485 full-duplex operation
- Electrical specifications: 3V to 3.6V supply voltage, 10Mbps data rate, 50mV receiver hysteresis
- Physical form factor: 8-SOIC surface mount package (0.154", 3.90mm width)
- Functional configuration: 1/1 driver/receiver topology
Substitute parts are grouped into three categories based on their relationship to the original specification:
Parametric Equivalents maintain identical electrical and functional specifications with variations only in packaging format (Cut Tape/Digi-Reel vs. Tube) and product status (Active vs. Obsolete).
Upgrade Parts provide extended operating temperature range (-40°C to 85°C vs. 0°C to 70°C) while maintaining all other electrical parameters, offering improved reliability for wider environmental conditions.
Manufacturer Recommended Alternatives include parts with modified data rate specifications (250kbps vs. 10Mbps) or alternative manufacturers, suitable for applications where lower bandwidth requirements exist.
Parameter Comparison
| Part Number | Manufacturer | Product Status | Data Rate | Operating Temperature | Packaging | Inventory | Substitution Type |
|---|---|---|---|---|---|---|---|
| MAX3490ECSA-T | Analog Devices Inc./Maxim Integrated | Obsolete | 10Mbps | 0°C ~ 70°C | Tube | 771 Pcs | Original |
| MAX3490CSA+T | Analog Devices Inc./Maxim Integrated | Active | 10Mbps | 0°C ~ 70°C | Cut Tape (CT) & Digi-Reel® | 3770 Pcs | Parametric Equivalent |
| MAX3490ECSA+T | Analog Devices Inc./Maxim Integrated | Active | 10Mbps | 0°C ~ 70°C | Cut Tape (CT) & Digi-Reel® | 3749 Pcs | Parametric Equivalent |
| ADM3490EARZ | Analog Devices Inc. | Active | 10Mbps | -40°C ~ 85°C | Tube | 1420 Pcs | Upgrade |
| ADM3490EARZ-REEL7 | Analog Devices Inc. | Active | 10Mbps | -40°C ~ 85°C | Cut Tape (CT) & Digi-Reel® | 15400 Pcs | Upgrade |
| ADM3488ARZ | Analog Devices Inc. | Active | 250kbps | -40°C ~ 85°C | Tube | 1121 Pcs | MFR Recommended |
| ADM3488ARZ-REEL7 | Analog Devices Inc. | Active | 250kbps | -40°C ~ 85°C | Cut Tape (CT) & Digi-Reel® | 2200 Pcs | MFR Recommended |
| ADM3488EARZ | Analog Devices Inc. | Active | 250kbps | -40°C ~ 85°C | Tube | 12800 Pcs | MFR Recommended |
| ADM3490ARZ | Analog Devices Inc. | Active | 10Mbps | -40°C ~ 85°C | Tube | 12939 Pcs | MFR Recommended |
| ADM3490ARZ-REEL7 | Analog Devices Inc. | Active | 10Mbps | -40°C ~ 85°C | Cut Tape (CT) & Digi-Reel® | 13100 Pcs | MFR Recommended |
| ISL83490IBZ | Renesas Electronics Corporation | Active | 10Mbps | -40°C ~ 85°C | Tube | 1491 Pcs | MFR Recommended |
Engineering Selection Recommendations
For Direct Replacement (Identical Specifications): MAX3490CSA+T and MAX3490ECSA+T are parametric equivalents with active product status, offering improved supply availability compared to the obsolete MAX3490ECSA-T. Both maintain the 0°C to 70°C operating temperature range and 10Mbps data rate. Selection between these two depends on packaging preference: Cut Tape/Digi-Reel format for automated assembly or Tube format for manual handling.
For Extended Temperature Range Applications: ADM3490EARZ and ADM3490EARZ-REEL7 provide identical electrical performance with extended operating temperature range (-40°C to 85°C), suitable for industrial and automotive environments. These parts maintain 10Mbps data rate capability and are manufactured by Analog Devices Inc. with active product status and high inventory availability.
For Lower Bandwidth Requirements: ADM3488 series parts (ADM3488ARZ, ADM3488ARZ-REEL7, ADM3488EARZ) operate at 250kbps data rate with extended temperature range. These are appropriate for applications where maximum data rate requirements do not exceed 250kbps, offering cost optimization while maintaining full RS422/RS485 protocol compliance.
For Multi-Manufacturer Sourcing: ISL83490IBZ from Renesas Electronics Corporation provides equivalent functionality with 10Mbps data rate and extended temperature range (-40°C to 85°C). This option enables supply chain diversification and reduces single-source dependency.
All substitute parts maintain ROHS3 compliance and 8-SOIC package compatibility with the original MAX3490ECSA-T.
Frequently Asked Questions (FAQ)
Q: Can MAX3490CSA+T directly replace MAX3490ECSA-T in existing designs?
A: Yes. MAX3490CSA+T is a parametric equivalent with identical electrical specifications, protocol support (RS422/RS485), data rate (10Mbps), supply voltage (3V to 3.6V), and 8-SOIC package. The primary difference is active product status and packaging format (Cut Tape/Digi-Reel vs. Tube).
Q: What is the difference between ADM3490EARZ and ADM3490EARZ-REEL7?
A: Both parts are electrically identical. The difference is packaging format: ADM3490EARZ is supplied in Tube format, while ADM3490EARZ-REEL7 is supplied in Cut Tape with Digi-Reel format. Selection depends on assembly process requirements.
Q: Can ADM3488 series parts replace MAX3490ECSA-T?
A: ADM3488 series parts are functionally compatible but operate at 250kbps maximum data rate versus 10Mbps for the MAX3490ECSA-T. Substitution is valid only for applications where the communication protocol does not require data rates exceeding 250kbps.
Q: Why does ISL83490IBZ have different Moisture Sensitivity Level (MSL)?
A: ISL83490IBZ has MSL 3 (168 Hours) versus MSL 1 (Unlimited) for Analog Devices parts. This affects storage and handling requirements but does not impact electrical performance or functional compatibility in the application circuit.
Q: Are all substitute parts ROHS3 compliant?
A: Yes. All listed substitute parts maintain ROHS3 compliance, matching the environmental certification of the original MAX3490ECSA-T.
Q: What is the recommended substitute for new designs?
A: For new designs requiring identical specifications to MAX3490ECSA-T, use MAX3490CSA+T or MAX3490ECSA+T. For applications requiring extended temperature range (-40°C to 85°C), use ADM3490EARZ or ADM3490EARZ-REEL7. For lower bandwidth applications, ADM3488 series provides cost-optimized alternatives.
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