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SP483EEN-L Equivalent & Substitute Parts
Part Overview
The SP483EEN-L is a half-duplex RS422/RS485 transceiver interface IC manufactured by MaxLinear, Inc., housed in an 8-SOIC package. This part is classified as obsolete, making equivalent substitutes necessary for new designs and ongoing production requirements. The device operates at 250 kbps data rate with a 20 mV receiver hysteresis, designed for industrial communication applications requiring reliable half-duplex serial transmission.
Substiute Parts
Key Parameters
| Parameter | SP483EEN-L |
|---|---|
| Manufacturer | MaxLinear, Inc. |
| Protocol | RS422, RS485 |
| Type | Transceiver Half Duplex |
| Number of Drivers/Receivers | 1/1 |
| Data Rate | 250 kbps |
| Receiver Hysteresis | 20 mV |
| 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 |
| Moisture Sensitivity Level | 1 (Unlimited) |
| Product Status | Obsolete |
Substitute Part Grouping Explanation
Substitution for the SP483EEN-L is determined by the following critical parameters:
- Protocol compatibility: RS422/RS485 half-duplex operation
- Electrical specifications: 4.75V ~ 5.25V supply voltage, 1/1 driver/receiver configuration
- Package compatibility: 8-SOIC form factor with identical 0.154" (3.90mm) width
- Functional equivalence: Half-duplex transceiver topology
- Environmental rating: Surface mount, MSL 1 classification
Substitute parts are grouped into two categories based on performance characteristics:
Category 1: Direct Functional Equivalents (250 kbps Data Rate) The LT1785ACS8#PBF from Analog Devices maintains the original 250 kbps data rate specification with identical receiver hysteresis (20 mV) and package configuration. This part is suitable for applications requiring exact performance matching to the SP483EEN-L.
Category 2: Enhanced Performance Alternatives (30 Mbps Data Rate) The ADM1485 and ADM1486 series from Analog Devices provide higher data rate capability (30 Mbps) with increased receiver hysteresis (70 mV) while maintaining the same 8-SOIC package and supply voltage range. These parts are backward compatible for lower-speed applications and offer extended temperature range options (-40°C ~ 85°C).
Parameter Comparison
| Parameter | SP483EEN-L | LT1785ACS8#PBF | ADM1485ARZ | ADM1486ARZ | ADM1487EARZ |
|---|---|---|---|---|---|
| Manufacturer | MaxLinear, Inc. | Analog Devices Inc. | Analog Devices Inc. | Analog Devices Inc. | Analog Devices Inc. |
| Protocol | RS422, RS485 | RS422, RS485 | RS422, RS485 | RS422, RS485 | RS422, RS485 |
| Drivers/Receivers | 1/1 | 1/1 | 1/1 | 1/1 | 1/1 |
| Duplex | Half | Half | Half | Half | Half |
| Data Rate | 250 kbps | 250 kbps | 30 Mbps | 30 Mbps | 2.5 Mbps |
| Receiver Hysteresis | 20 mV | 20 mV | 70 mV | 70 mV | 70 mV |
| Voltage Supply | 4.75V ~ 5.25V | 4.75V ~ 5.25V | 4.75V ~ 5.25V | 4.75V ~ 5.25V | 4.75V ~ 5.25V |
| Operating Temperature | -40°C ~ 85°C | 0°C ~ 70°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 |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| MSL Rating | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) |
| Product Status | Obsolete | Active | Active | Active | Active |
| RoHS Status | Not specified | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
Engineering Selection Recommendations
For Direct Replacement (Identical Performance): The LT1785ACS8#PBF is the primary substitute when exact performance matching is required. It maintains the 250 kbps data rate and 20 mV receiver hysteresis of the SP483EEN-L. However, the operating temperature range is limited to 0°C ~ 70°C, which may not be suitable for applications requiring the full -40°C ~ 85°C range. This part is ROHS3 compliant and carries active product status.
For Extended Temperature Range Applications: The ADM1485ARZ and ADM1486ARZ series are recommended for designs requiring the full -40°C ~ 85°C operating temperature range. Both maintain the 8-SOIC package and 4.75V ~ 5.25V supply voltage. The ADM1485ARZ operates at 0°C ~ 70°C, while ADM1486ARZ extends to -40°C ~ 85°C. Both are ROHS3 compliant with active product status.
For Higher Data Rate Capability: The ADM1485ARZ and ADM1486ARZ offer 30 Mbps data rate capability, providing headroom for future protocol upgrades while remaining backward compatible with 250 kbps applications. The increased receiver hysteresis (70 mV) provides improved noise immunity compared to the original 20 mV specification.
For Lower Speed Applications: The ADM1487EARZ operates at 2.5 Mbps and is suitable for applications with reduced bandwidth requirements while maintaining full -40°C ~ 85°C temperature coverage and ROHS3 compliance.
All substitute parts are available in multiple packaging options (Tube, Cut Tape & Digi-Reel, Tape & Reel) to accommodate different procurement and assembly requirements.
Frequently Asked Questions (FAQ)
Q: Can the LT1785ACS8#PBF be used as a direct replacement for SP483EEN-L in all applications?
A: The LT1785ACS8#PBF is electrically equivalent with matching 250 kbps data rate and 20 mV receiver hysteresis. However, its operating temperature range is limited to 0°C ~ 70°C compared to the SP483EEN-L's -40°C ~ 85°C range. Applications requiring extended temperature operation must use ADM1485ARZ or ADM1486ARZ instead.
Q: What is the difference between ADM1485ARZ and ADM1486ARZ?
A: Both parts are functionally identical with 30 Mbps data rate and 70 mV receiver hysteresis. The primary difference is operating temperature range: ADM1485ARZ operates at 0°C ~ 70°C, while ADM1486ARZ extends to -40°C ~ 85°C. For applications requiring full temperature coverage, ADM1486ARZ is the appropriate selection.
Q: Are all substitute parts available in the same 8-SOIC package?
A: Yes, all substitute parts listed are housed in the 8-SOIC (0.154", 3.90mm Width) package, ensuring mechanical compatibility with existing PCB layouts. Packaging options vary (Tube, Cut Tape & Digi-Reel, Tape & Reel) to support different procurement workflows.
Q: Do the substitute parts maintain the same supply voltage specification?
A: Yes, all substitute parts operate within the 4.75V ~ 5.25V supply voltage range, matching the SP483EEN-L specification. This ensures compatibility with existing power supply designs.
Q: What is the significance of the increased receiver hysteresis in ADM1485/ADM1486 parts?
A: The ADM1485 and ADM1486 series feature 70 mV receiver hysteresis compared to the original 20 mV specification. This increased hysteresis provides improved noise immunity and signal stability in electrically noisy environments, while remaining compatible with standard RS422/RS485 signaling levels.
Q: Are all substitute parts RoHS compliant?
A: Yes, all Analog Devices substitute parts (LT1785ACS8#PBF, ADM1485, ADM1486, ADM1487) are ROHS3 compliant, meeting current environmental and regulatory requirements for electronic components.
Q: Which substitute part should be selected for new designs?
A: For new designs, ADM1486ARZ or ADM1486ARZ-REEL are recommended. These parts offer the full -40°C ~ 85°C temperature range, 30 Mbps data rate capability, ROHS3 compliance, and active product status with high inventory availability. The choice between tube and reel packaging depends on assembly volume and procurement requirements.
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