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SP483ECN-L Equivalent & Substitute Parts
Part Overview
The SP483ECN-L is a 1/1 half-duplex RS422/RS485 transceiver IC manufactured by MaxLinear, Inc., housed in an 8-SOIC package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new design implementations. The part operates within a 4.75V to 5.25V supply voltage range with a 250kbps data rate and 20mV receiver hysteresis, suitable for industrial serial communication applications.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | SP483ECN-L |
| Manufacturer | MaxLinear, Inc. |
| Type | Transceiver |
| Protocol | RS422, RS485 |
| Number of Drivers/Receivers | 1/1 |
| Duplex | Half |
| Data Rate | 250kbps |
| 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 |
| Receiver Hysteresis | 20 mV |
| Product Status | Obsolete |
Substitute Part Grouping Explanation
Substitution of the SP483ECN-L is determined by the following critical parameters:
- Protocol compatibility: RS422/RS485 half-duplex operation
- Electrical interface: 1/1 driver/receiver configuration
- Supply voltage range: 4.75V ~ 5.25V
- Package form factor: 8-SOIC (0.154", 3.90mm Width)
- Mounting type: Surface Mount
Substitute parts are grouped into two categories:
Direct Substitutes (Compatible Replacements): Parts meeting all critical parameters with equivalent or superior performance characteristics. These include LT1785ACS8#PBF and LTC1481 series variants, which maintain identical electrical interfaces and package specifications.
Upgrade Substitutes (Enhanced Performance): Parts exceeding the original specifications while maintaining full backward compatibility. The ADM1485 series offers superior data rate performance (30Mbps vs. 250kbps) and enhanced receiver hysteresis (70mV vs. 20mV), enabling use in more demanding applications while remaining pin-compatible.
Parameter Comparison
| Part Number | Manufacturer | Protocol | Drivers/Receivers | Data Rate | Supply Voltage | Operating Temp | Receiver Hysteresis | Package | Product Status |
|---|---|---|---|---|---|---|---|---|---|
| SP483ECN-L | MaxLinear, Inc. | RS422, RS485 | 1/1 | 250kbps | 4.75V ~ 5.25V | -40°C ~ 85°C | 20 mV | 8-SOIC | Obsolete |
| LT1785ACS8#PBF | Analog Devices Inc. | RS422, RS485 | 1/1 | 250kbps | 4.75V ~ 5.25V | 0°C ~ 70°C | 20 mV | 8-SOIC | Active |
| LTC1481CS8#PBF | Analog Devices Inc. | RS422, RS485 | 1/1 | 2.5Mbps | 4.75V ~ 5.25V | 0°C ~ 70°C | 45 mV | 8-SOIC | Active |
| LTC1481CS8#TRPBF | Analog Devices Inc. | RS422, RS485 | 1/1 | 2.5Mbps | 4.75V ~ 5.25V | 0°C ~ 70°C | 45 mV | 8-SOIC | Active |
| LTC1481IS8#PBF | Analog Devices Inc. | RS422, RS485 | 1/1 | 2.5Mbps | 4.75V ~ 5.25V | -40°C ~ 85°C | 45 mV | 8-SOIC | Active |
| LTC1481IS8#TRPBF | Analog Devices Inc. | RS422, RS485 | 1/1 | 2.5Mbps | 4.75V ~ 5.25V | -40°C ~ 85°C | 45 mV | 8-SOIC | Active |
| ADM1485ARZ | Analog Devices Inc. | RS422, RS485 | 1/1 | 30Mbps | 4.75V ~ 5.25V | -40°C ~ 85°C | 70 mV | 8-SOIC | Active |
| ADM1485ARZ-REEL | Analog Devices Inc. | RS422, RS485 | 1/1 | 30Mbps | 4.75V ~ 5.25V | -40°C ~ 85°C | 70 mV | 8-SOIC | Active |
| ADM1485ARZ-REEL7 | Analog Devices Inc. | RS422, RS485 | 1/1 | 30Mbps | 4.75V ~ 5.25V | -40°C ~ 85°C | 70 mV | 8-SOIC | Active |
| ADM1485JRZ | Analog Devices Inc. | RS422, RS485 | 1/1 | 30Mbps | 4.75V ~ 5.25V | 0°C ~ 70°C | 70 mV | 8-SOIC | Active |
| ADM1485JRZ-REEL | Analog Devices Inc. | RS422, RS485 | 1/1 | 30Mbps | 4.75V ~ 5.25V | 0°C ~ 70°C | 70 mV | 8-SOIC | Active |
Engineering Selection Recommendations
For Direct Replacement (Equivalent Performance):
LT1785ACS8#PBF provides the closest functional equivalent to SP483ECN-L with identical data rate and receiver hysteresis specifications. This part is manufactured by Analog Devices Inc., an active product with ROHS3 compliance and REACH unaffected status. The primary consideration is the narrower operating temperature range (0°C ~ 70°C vs. -40°C ~ 85°C), which may limit use in extended temperature applications.
For Extended Temperature Applications:
LTC1481IS8#PBF and LTC1481IS8#TRPBF maintain the full -40°C ~ 85°C operating range while offering enhanced data rate performance (2.5Mbps) and improved receiver hysteresis (45mV). Both variants are ROHS3 compliant and active products. The Tape & Reel variant (LTC1481IS8#TRPBF) is suitable for high-volume manufacturing.
For High-Performance Applications:
ADM1485 series parts (ADM1485ARZ, ADM1485ARZ-REEL, ADM1485ARZ-REEL7, ADM1485JRZ, ADM1485JRZ-REEL) deliver superior performance with 30Mbps data rate capability and 70mV receiver hysteresis. All variants maintain 8-SOIC package compatibility and are ROHS3 compliant. Temperature-rated variants include -40°C ~ 85°C (ARZ series) and 0°C ~ 70°C (JRZ series) options.
Frequently Asked Questions (FAQ)
Q: Can LT1785ACS8#PBF be used as a direct replacement for SP483ECN-L?
A: LT1785ACS8#PBF is functionally equivalent with matching data rate (250kbps) and receiver hysteresis (20mV). Pin compatibility and electrical interface are identical. The operating temperature range is narrower (0°C ~ 70°C), which may restrict use in applications requiring -40°C ~ 85°C operation.
Q: What is the difference between LTC1481CS8#PBF and LTC1481IS8#PBF?
A: Both parts share identical electrical specifications and package form factor. The primary difference is operating temperature range: LTC1481CS8#PBF operates 0°C ~ 70°C, while LTC1481IS8#PBF extends to -40°C ~ 85°C. The "I" temperature grade designation indicates the wider industrial temperature range.
Q: Are ADM1485 parts backward compatible with SP483ECN-L?
A: ADM1485 parts maintain full pin and package compatibility with SP483ECN-L in the 8-SOIC form factor. Electrical interface specifications (RS422/RS485, 1/1 configuration, 4.75V ~ 5.25V supply) are identical. Enhanced performance characteristics (30Mbps data rate, 70mV hysteresis) represent improvements that do not compromise backward compatibility.
Q: What packaging options are available for substitute parts?
A: Substitute parts are available in Tube packaging (standard) and Tape & Reel (TR) or Cut Tape & Digi-Reel variants. Tube packaging is suitable for lower-volume applications, while Tape & Reel variants are optimized for automated assembly and high-volume production.
Q: Are all substitute parts ROHS3 compliant?
A: All active substitute parts listed (LT1785ACS8#PBF, LTC1481 series, ADM1485 series) are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.
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