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SP483EEP-L Equivalent & Substitute Parts
Part Overview
The SP483EEP-L is a half-duplex RS422/RS485 transceiver IC manufactured by MaxLinear, Inc., housed in an 8-pin DIP package for through-hole mounting. This part operates at 250 kbps data rate with a 20 mV receiver hysteresis and supports supply voltages from 4.75V to 5.25V across an operating temperature range of -40°C to 85°C. The SP483EEP-L is classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new designs requiring this functionality.
Substiute Parts
Key Parameters
| Parameter | SP483EEP-L |
|---|---|
| Manufacturer | MaxLinear, Inc. |
| Protocol | RS422, RS485 |
| Type | Transceiver Half 1/1 |
| Data Rate | 250 kbps |
| Receiver Hysteresis | 20 mV |
| Voltage - Supply | 4.75V ~ 5.25V |
| Operating Temperature | -40°C ~ 85°C |
| Mounting Type | Through Hole |
| Package / Case | 8-DIP (0.300", 7.62mm) |
| Product Status | Obsolete |
Substitute Part Grouping Explanation
Substitution for the SP483EEP-L is determined by strict alignment of the following parameters:
Primary Substitution Criteria:
- Protocol: RS422/RS485 half-duplex transceiver
- Package Type: 8-DIP through-hole mounting (0.300", 7.62mm)
- Supply Voltage Range: 4.75V ~ 5.25V
- Operating Temperature Range: -40°C ~ 85°C
- Receiver Hysteresis: 20 mV
- Data Rate: 250 kbps
Substitute Categories:
Category 1: Direct Pin-Compatible Replacements (Same Package, Same Electrical Specifications) Parts meeting all primary criteria with identical or superior electrical performance and active product status.
Category 2: Functional Equivalents with Extended Temperature Range Parts with matching core specifications but extended operating temperature ranges, suitable for applications requiring broader thermal operation.
Category 3: Surface Mount Alternative The SP483EEN-L/TR provides functional equivalence in 8-SOIC surface mount packaging for designs transitioning to SMT assembly.
Parameter Comparison
| Part Number | Manufacturer | Package | Data Rate | Receiver Hysteresis | Supply Voltage | Operating Temp | Product Status | Mounting Type |
|---|---|---|---|---|---|---|---|---|
| SP483EEP-L | MaxLinear, Inc. | 8-DIP | 250 kbps | 20 mV | 4.75V ~ 5.25V | -40°C ~ 85°C | Obsolete | Through Hole |
| SP483EEN-L/TR | MaxLinear, Inc. | 8-SOIC | 250 kbps | 20 mV | 4.75V ~ 5.25V | -40°C ~ 85°C | Active | Surface Mount |
| LT1785ACN8#PBF | Analog Devices Inc. | 8-DIP | 250 kbps | 20 mV | 4.75V ~ 5.25V | 0°C ~ 70°C | Active | Through Hole |
| LT1785AHN8#PBF | Analog Devices Inc. | 8-DIP | 250 kbps | 20 mV | 4.75V ~ 5.25V | -40°C ~ 125°C | Active | Through Hole |
| LT1785CN8#PBF | Analog Devices Inc. | 8-DIP | 250 kbps | 20 mV | 4.75V ~ 5.25V | 0°C ~ 70°C | Active | Through Hole |
| ISL81487LIPZ | Renesas Electronics Corporation | 8-DIP | 250 kbps | 70 mV | 4.5V ~ 5.5V | -40°C ~ 85°C | Active | Through Hole |
| ADM1485ANZ | Analog Devices Inc. | 8-DIP | 30 Mbps | 70 mV | 4.75V ~ 5.25V | -40°C ~ 85°C | Active | Through Hole |
| ADM1485JNZ | Analog Devices Inc. | 8-DIP | 30 Mbps | 70 mV | 4.75V ~ 5.25V | 0°C ~ 70°C | Active | Through Hole |
| ADM485ANZ | Analog Devices Inc. | 8-DIP | 5 Mbps | 70 mV | 4.75V ~ 5.25V | -40°C ~ 85°C | Active | Through Hole |
| ADM485JNZ | Analog Devices Inc. | 8-DIP | 5 Mbps | 70 mV | 4.75V ~ 5.25V | 0°C ~ 70°C | Active | Through Hole |
| ISL81487EIPZ | Renesas Electronics Corporation | 8-DIP | 5 Mbps | 70 mV | 4.5V ~ 5.5V | -40°C ~ 85°C | Active | Through Hole |
Engineering Selection Recommendations
For Direct Replacement (Identical Specifications): The LT1785AHN8#PBF offers the closest functional match with identical electrical parameters (250 kbps data rate, 20 mV hysteresis) and extends the operating temperature range to -40°C to 125°C. This part is ROHS3 compliant and carries active product status, ensuring long-term availability and supply chain stability.
For Temperature-Constrained Applications: The LT1785ACN8#PBF and LT1785CN8#PBF are suitable for applications operating within 0°C to 70°C, maintaining the same 250 kbps data rate and 20 mV receiver hysteresis as the original SP483EEP-L.
For Higher Data Rate Requirements: The ADM1485ANZ and ADM1485JNZ support 30 Mbps data rates with 70 mV receiver hysteresis. These parts maintain the same 8-DIP package and supply voltage range but operate at higher speeds, suitable for applications requiring enhanced bandwidth.
For Lower Speed Applications: The ADM485ANZ and ADM485JNZ operate at 5 Mbps with 70 mV receiver hysteresis, appropriate for legacy systems or applications with reduced bandwidth requirements.
For Extended Supply Voltage Tolerance: The ISL81487EIPZ and ISL81487LIPZ from Renesas support a broader supply voltage range (4.5V ~ 5.5V) compared to the standard 4.75V ~ 5.25V specification, providing additional design margin in power supply applications.
For Surface Mount Assembly: The SP483EEN-L/TR maintains identical electrical specifications in an 8-SOIC surface mount package, enabling transition to modern PCB assembly processes while preserving functional compatibility.
All recommended substitutes carry ROHS3 compliance and active product status, ensuring regulatory alignment and supply chain continuity.
Frequently Asked Questions (FAQ)
Q: Can the LT1785AHN8#PBF directly replace the SP483EEP-L in existing designs? A: Yes. The LT1785AHN8#PBF is pin-compatible in the 8-DIP package and matches the SP483EEP-L's electrical specifications (250 kbps data rate, 20 mV receiver hysteresis, 4.75V ~ 5.25V supply). The extended temperature range (-40°C ~ 125°C) provides additional operational margin without affecting circuit functionality.
Q: What is the difference between 20 mV and 70 mV receiver hysteresis? A: Receiver hysteresis determines the voltage differential required to switch the receiver output. The 20 mV specification in the SP483EEP-L and LT1785 series provides tighter noise immunity for low-level signals. The 70 mV hysteresis in ADM1485 and ISL81487 series offers greater noise rejection in electrically noisy environments but may reduce sensitivity to weak signals.
Q: Are the ADM1485 and ADM485 series suitable replacements? A: The ADM1485 and ADM485 series are functionally compatible but differ in data rate (30 Mbps and 5 Mbps respectively versus 250 kbps) and receiver hysteresis (70 mV versus 20 mV). These parts are suitable only if the application can tolerate higher hysteresis and the specified data rate does not exceed the system requirements.
Q: What is the advantage of the SP483EEN-L/TR surface mount version? A: The SP483EEN-L/TR maintains identical electrical specifications in an 8-SOIC surface mount package, enabling transition to automated PCB assembly and reducing board space requirements. Pin functionality remains unchanged, requiring only PCB layout modification.
Q: Are all substitute parts ROHS3 compliant? A: Yes. All recommended substitute parts carry ROHS3 compliance certification, ensuring regulatory alignment with current environmental and hazardous substance restrictions.
Q: What supply voltage range should I verify for my application? A: The SP483EEP-L operates at 4.75V ~ 5.25V. Most substitutes maintain this range, with the exception of ISL81487 series parts, which support 4.5V ~ 5.5V. Verify your power supply design operates within the specified range of your selected substitute.
Q: Can I use a higher data rate part in a lower speed application? A: Yes. Parts rated for higher data rates (such as ADM1485 at 30 Mbps) operate correctly at lower speeds. However, the reverse is not true; lower-rated parts should not be used in higher-speed applications.
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