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MAX489CSD RS422/RS485 Transceiver Equivalent & Substitute Parts
Part Overview
The MAX489CSD is a full-duplex RS422/RS485 transceiver manufactured by Analog Devices Inc./Maxim Integrated, housed in a 14-SOIC surface mount package. This component is classified as obsolete, which necessitates identification of equivalent and substitute parts for ongoing design support and procurement continuity. The transceiver operates at 250 kbps data rate with 1/1 driver/receiver configuration, suitable for industrial communication applications requiring RS422 or RS485 protocol support.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | MAX489CSD |
| Manufacturer | Analog Devices Inc./Maxim Integrated |
| Type | Transceiver |
| Protocol | RS422, RS485 |
| Number of Drivers/Receivers | 1/1 |
| Duplex | Full |
| Data Rate | 250 kbps |
| Receiver Hysteresis | 70 mV |
| Voltage - Supply | 4.75V ~ 5.25V |
| Operating Temperature | 0°C ~ 70°C |
| Package / Case | 14-SOIC (0.154", 3.90mm Width) |
| Mounting Type | Surface Mount |
| Product Status | Obsolete |
| RoHS Status | RoHS non-compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution of the MAX489CSD is determined by strict equivalence across the following critical parameters:
Mandatory Matching Parameters:
- Protocol: RS422, RS485
- Number of Drivers/Receivers: 1/1
- Duplex: Full
- Receiver Hysteresis: 70 mV
- Data Rate: 250 kbps
- Package / Case: 14-SOIC (0.154", 3.90mm Width)
- Mounting Type: Surface Mount
Acceptable Variation Parameters:
- Voltage - Supply: Parts with 4.5V ~ 5.5V supply range are compatible with the 4.75V ~ 5.25V requirement
- Operating Temperature: Parts with extended temperature range (-40°C ~ 85°C) are compatible with the 0°C ~ 70°C requirement
- RoHS Status: ROHS3 compliant parts are acceptable replacements for RoHS non-compliant originals
- Moisture Sensitivity Level: MSL 3 (168 Hours) is acceptable for MSL 1 applications
- Packaging Format: Tube, Tape & Reel (TR), and Cut Tape (CT) formats are interchangeable for the same part number base
Substitute parts are grouped into three categories: parametric equivalents (identical electrical specifications with different product status), manufacturer-recommended alternatives (extended temperature and supply voltage range), and cross-manufacturer equivalents (functionally identical from alternative manufacturers).
Parameter Comparison
| Part Number | Manufacturer | Protocol | Drivers/Receivers | Data Rate | Supply Voltage | Operating Temp | Package | Product Status | RoHS Status | MSL |
|---|---|---|---|---|---|---|---|---|---|---|
| MAX489CSD | Analog Devices/Maxim | RS422, RS485 | 1/1 | 250 kbps | 4.75V ~ 5.25V | 0°C ~ 70°C | 14-SOIC | Obsolete | RoHS non-compliant | 1 |
| MAX489CSD+ | Analog Devices/Maxim | RS422, RS485 | 1/1 | 250 kbps | 4.75V ~ 5.25V | 0°C ~ 70°C | 14-SOIC | Active | ROHS3 Compliant | 1 |
| MAX489ECSD+ | Analog Devices/Maxim | RS422, RS485 | 1/1 | 250 kbps | 4.75V ~ 5.25V | 0°C ~ 70°C | 14-SOIC | Active | ROHS3 Compliant | 1 |
| ADM489ABRZ | Analog Devices | RS422, RS485 | 1/1 | 250 kbps | 4.5V ~ 5.5V | -40°C ~ 85°C | 14-SOIC | Active | ROHS3 Compliant | 1 |
| ADM489ABRZ-REEL7 | Analog Devices | RS422, RS485 | 1/1 | 250 kbps | 4.5V ~ 5.5V | -40°C ~ 85°C | 14-SOIC | Active | ROHS3 Compliant | 1 |
| ADM489ARZ-REEL | Analog Devices | RS422, RS485 | 1/1 | 250 kbps | 4.5V ~ 5.5V | -40°C ~ 85°C | 14-SOIC | Not For New Designs | ROHS3 Compliant | 1 |
| ADM489ARZ-REEL7 | Analog Devices | RS422, RS485 | 1/1 | 250 kbps | 4.5V ~ 5.5V | -40°C ~ 85°C | 14-SOIC | Active | ROHS3 Compliant | 1 |
| ISL4489EIBZ | Renesas Electronics | RS422, RS485 | 1/1 | 250 kbps | 4.5V ~ 5.5V | -40°C ~ 85°C | 14-SOIC | Active | ROHS3 Compliant | 3 |
| ISL4489EIBZ-T | Renesas Electronics | RS422, RS485 | 1/1 | 250 kbps | 4.5V ~ 5.5V | -40°C ~ 85°C | 14-SOIC | Active | ROHS3 Compliant | 3 |
| ISL8489EIBZ | Renesas Electronics | RS422, RS485 | 1/1 | 250 kbps | 4.5V ~ 5.5V | -40°C ~ 85°C | 14-SOIC | Active | ROHS3 Compliant | 3 |
| ISL8489EIBZ-T | Renesas Electronics | RS422, RS485 | 1/1 | 250 kbps | 4.5V ~ 5.5V | -40°C ~ 85°C | 14-SOIC | Active | ROHS3 Compliant | 3 |
Engineering Selection Recommendations
For Direct Replacement (Same Electrical Specifications): MAX489CSD+ and MAX489ECSD+ are parametric equivalents with identical electrical characteristics. Both are active products with ROHS3 compliance, making them suitable for direct substitution in existing designs. These parts maintain the original 4.75V ~ 5.25V supply voltage and 0°C ~ 70°C operating temperature range.
For Extended Operating Conditions: ADM489ABRZ, ADM489ABRZ-REEL7, and ADM489ARZ-REEL7 provide extended supply voltage range (4.5V ~ 5.5V) and extended operating temperature range (-40°C ~ 85°C). These are manufacturer-recommended alternatives suitable for applications requiring broader environmental specifications. ADM489ABRZ-REEL7 and ADM489ARZ-REEL7 are active products; ADM489ARZ-REEL is designated "Not For New Designs."
For Cross-Manufacturer Equivalents: ISL4489EIBZ, ISL4489EIBZ-T, ISL8489EIBZ, and ISL8489EIBZ-T from Renesas Electronics Corporation provide functional equivalence with extended operating conditions. These parts carry MSL 3 (168 Hours) rating compared to MSL 1 of the original, which may require adjusted handling procedures for moisture-sensitive storage and assembly environments.
Compliance Considerations: All substitute parts listed are ROHS3 compliant, addressing regulatory requirements that the original obsolete MAX489CSD does not meet. Selection should account for design timeline, environmental requirements, and supply chain availability.
Frequently Asked Questions (FAQ)
Q: Can MAX489CSD+ be used as a direct replacement for MAX489CSD? A: Yes. MAX489CSD+ is a parametric equivalent with identical electrical specifications, package, and pin configuration. The primary difference is active product status and ROHS3 compliance.
Q: What is the difference between ADM489ABRZ and ADM489ABRZ-REEL7? A: Both parts are electrically identical. The difference is packaging format: ADM489ABRZ is supplied in Tube packaging, while ADM489ABRZ-REEL7 is supplied in Tape & Reel (TR) format. Selection depends on assembly line requirements and volume.
Q: Are Renesas ISL8489EIBZ parts compatible with the original MAX489CSD? A: Yes, ISL8489EIBZ and ISL8489EIBZ-T are functionally equivalent across all critical parameters. The MSL rating differs (MSL 3 versus MSL 1), requiring appropriate moisture control during storage and assembly. Extended operating temperature range (-40°C ~ 85°C) provides additional environmental margin.
Q: Why is ADM489ARZ-REEL marked "Not For New Designs"? A: This designation indicates the part is in mature phase with limited future support. For new designs, use ADM489ABRZ-REEL7 or ADM489ARZ-REEL7, which are active products with full manufacturer support.
Q: Can I use parts with extended temperature range in place of the original? A: Yes. Extended temperature range (-40°C ~ 85°C) is a superset of the original range (0°C ~ 70°C). Parts with broader specifications are compatible with original design requirements.
Q: What packaging options are available for equivalent parts? A: Equivalent parts are available in Tube, Tape & Reel (TR), and Cut Tape (CT) & Digi-Reel® formats. Selection depends on assembly equipment and procurement volume requirements.
Q: Are all substitute parts ROHS3 compliant? A: Yes. All substitute parts listed carry ROHS3 compliance certification, meeting current regulatory requirements for electronic components.
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