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MAX487ECSA RS422/RS485 Half-Duplex Transceiver Equivalent & Substitute Parts
Part Overview
The MAX487ECSA is a half-duplex RS422/RS485 transceiver manufactured by Analog Devices Inc./Maxim Integrated, housed in an 8-SOIC surface mount package. This component is classified as obsolete, with 2,447 units currently in stock. The part operates at 250 kbps data rate with a supply voltage range of 4.75V to 5.25V and a receiver hysteresis of 70 mV. Due to its obsolete status and RoHS non-compliance, identifying equivalent and substitute parts is essential for ongoing system support and new design implementations.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | MAX487ECSA |
| Manufacturer | Analog Devices Inc./Maxim Integrated |
| Type | Transceiver |
| Protocol | RS422, RS485 |
| Number of Drivers/Receivers | 1/1 |
| Duplex | Half |
| Data Rate | 250 kbps |
| Voltage - Supply | 4.75V ~ 5.25V |
| Receiver Hysteresis | 70 mV |
| Operating Temperature | 0°C ~ 70°C |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) |
| Mounting Type | Surface Mount |
| Product Status | Obsolete |
| RoHS Status | RoHS non-compliant |
Substitute Part Grouping Explanation
Substitution eligibility for the MAX487ECSA is determined by strict adherence to the following electrical and mechanical parameters:
Critical Matching Parameters:
- Protocol: RS422/RS485 half-duplex operation
- Number of Drivers/Receivers: 1/1 configuration
- Package / Case: 8-SOIC (0.154", 3.90mm Width)
- Receiver Hysteresis: 70 mV
- Voltage - Supply: 4.75V ~ 5.25V
- Mounting Type: Surface Mount
Substitution Categories:
Parametric Equivalents match all critical electrical parameters and package specifications. These parts maintain identical functional characteristics within the specified operating conditions:
- MAX483CSA+
- MAX483ECSA+
- MAX487CSA+
- MAX487ECSA+
Manufacturer Recommended Substitutes are approved alternatives that maintain core RS422/RS485 half-duplex transceiver functionality with identical package and mounting specifications. These parts may exceed the original specifications in data rate and operating temperature range:
- ADM1485ARZ
- ADM1485ARZ-REEL
- ADM1485ARZ-REEL7
- ADM1485JRZ
- ADM1485JRZ-REEL
- ADM1486ARZ
Parameter Comparison
| Part Number | Manufacturer | Protocol | Drivers/Receivers | Data Rate | Supply Voltage | Operating Temp | Package | Product Status | RoHS Status |
|---|---|---|---|---|---|---|---|---|---|
| MAX487ECSA | Analog Devices/Maxim | RS422, RS485 | 1/1 | 250 kbps | 4.75V ~ 5.25V | 0°C ~ 70°C | 8-SOIC | Obsolete | Non-compliant |
| MAX483CSA+ | Analog Devices/Maxim | RS422, RS485 | 1/1 | 250 kbps | 4.75V ~ 5.25V | 0°C ~ 70°C | 8-SOIC | Active | ROHS3 Compliant |
| MAX483ECSA+ | Analog Devices/Maxim | RS422, RS485 | 1/1 | 250 kbps | 4.75V ~ 5.25V | 0°C ~ 70°C | 8-SOIC | Active | ROHS3 Compliant |
| MAX487CSA+ | Analog Devices/Maxim | RS422, RS485 | 1/1 | 250 kbps | 4.75V ~ 5.25V | 0°C ~ 70°C | 8-SOIC | Active | ROHS3 Compliant |
| MAX487ECSA+ | Analog Devices/Maxim | RS422, RS485 | 1/1 | 250 kbps | 4.75V ~ 5.25V | 0°C ~ 70°C | 8-SOIC | Active | ROHS3 Compliant |
| ADM1485ARZ | Analog Devices | RS422, RS485 | 1/1 | 30 Mbps | 4.75V ~ 5.25V | -40°C ~ 85°C | 8-SOIC | Active | ROHS3 Compliant |
| ADM1485ARZ-REEL | Analog Devices | RS422, RS485 | 1/1 | 30 Mbps | 4.75V ~ 5.25V | -40°C ~ 85°C | 8-SOIC | Active | ROHS3 Compliant |
| ADM1485ARZ-REEL7 | Analog Devices | RS422, RS485 | 1/1 | 30 Mbps | 4.75V ~ 5.25V | -40°C ~ 85°C | 8-SOIC | Active | ROHS3 Compliant |
| ADM1485JRZ | Analog Devices | RS422, RS485 | 1/1 | 30 Mbps | 4.75V ~ 5.25V | 0°C ~ 70°C | 8-SOIC | Active | ROHS3 Compliant |
| ADM1485JRZ-REEL | Analog Devices | RS422, RS485 | 1/1 | 30 Mbps | 4.75V ~ 5.25V | 0°C ~ 70°C | 8-SOIC | Active | ROHS3 Compliant |
| ADM1486ARZ | Analog Devices | RS422, RS485 | 1/1 | 30 Mbps | 4.75V ~ 5.25V | -40°C ~ 85°C | 8-SOIC | Active | ROHS3 Compliant |
Engineering Selection Recommendations
For Direct Replacement (Identical Specifications): Select MAX483ECSA+ or MAX487ECSA+ for direct substitution. Both parts maintain identical electrical parameters and operating temperature range as the MAX487ECSA while offering active product status and ROHS3 compliance. These parts are pin-compatible and functionally equivalent.
For Enhanced Performance Applications: The ADM1485 series (ADM1485ARZ, ADM1485ARZ-REEL, ADM1485ARZ-REEL7, ADM1485JRZ, ADM1485JRZ-REEL) and ADM1486ARZ provide superior data rate capability at 30 Mbps compared to the original 250 kbps specification. All ADM1485 and ADM1486 variants maintain the same 8-SOIC package, supply voltage range, and half-duplex RS422/RS485 protocol. These parts are manufacturer-recommended alternatives with ROHS3 compliance and extended or equivalent operating temperature ranges.
For Temperature-Extended Applications: ADM1485ARZ, ADM1485ARZ-REEL, ADM1485ARZ-REEL7, and ADM1486ARZ support -40°C to 85°C operating range, suitable for industrial and automotive environments. ADM1485JRZ and ADM1485JRZ-REEL maintain the original 0°C to 70°C range.
Compliance Consideration: All recommended substitutes are ROHS3 compliant, addressing the non-compliance status of the obsolete MAX487ECSA.
Frequently Asked Questions (FAQ)
Q: Can MAX483ECSA+ or MAX487ECSA+ be used as direct replacements for MAX487ECSA? A: Yes. Both parts are parametric equivalents with identical electrical specifications, operating temperature range, and 8-SOIC package. The primary difference is active product status and ROHS3 compliance.
Q: What is the key difference between the MAX483/MAX487 series and the ADM1485/ADM1486 series? A: The ADM1485 and ADM1486 series support 30 Mbps data rate compared to 250 kbps in the MAX483/MAX487 series. All maintain identical package, supply voltage, and RS422/RS485 protocol specifications. The ADM series represents manufacturer-recommended enhanced alternatives.
Q: Are packaging options different between substitutes? A: Yes. MAX483CSA+, MAX483ECSA+, MAX487CSA+, and MAX487ECSA+ are supplied in Tube packaging. ADM1485ARZ and ADM1485JRZ are supplied in Tube packaging. ADM1485ARZ-REEL, ADM1485ARZ-REEL7, and ADM1485JRZ-REEL are supplied in Cut Tape (CT) & Digi-Reel® packaging. All maintain identical 8-SOIC case dimensions.
Q: Which substitute is best for industrial temperature range applications? A: ADM1485ARZ, ADM1485ARZ-REEL, ADM1485ARZ-REEL7, and ADM1486ARZ support -40°C to 85°C operating range, suitable for industrial environments. These parts exceed the original 0°C to 70°C specification.
Q: Is the receiver hysteresis specification maintained across all substitutes? A: Yes. All substitute parts maintain the 70 mV receiver hysteresis specification of the original MAX487ECSA.
Q: What is the inventory status of substitute parts? A: MAX483ECSA+ (2,000 units), MAX487ECSA+ (3,200 units), ADM1485ARZ (19,566 units), ADM1485ARZ-REEL (30,400 units), ADM1485ARZ-REEL7 (15,100 units), ADM1485JRZ (16,500 units), ADM1485JRZ-REEL (19,479 units), and ADM1486ARZ (9,798 units) are available in stock.
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