Original Part
Alternative Part
1. LTC485CS8TRPBF Substitution Conclusion
The LTC485CS8TRPBF is functionally compatible with the original SP485EEN-L (both are half-duplex 1/1 RS-485/RS-422 transceivers with identical supply voltage and package). However, its receiver hysteresis is 70 mV, which is higher than the 20 mV of the SP485EEN-L, providing improved noise immunity in harsh environments. This increased hysteresis may slightly reduce sensitivity to weak signals due to the higher threshold voltage. Additionally, the data rate is not explicitly specified; the datasheet should be consulted to confirm support for 10 Mbps operation. Substitution is acceptable if the actual communication rate is below 10 Mbps and the system is not sensitive to hysteresis variation, but verification of high-speed communication reliability prior to replacement is recommended.
2. ADM1485JRZ-REEL Substitution Conclusion
The ADM1485JRZ-REEL is a direct replacement for the SP485EEN-L, as both are 5V, 8-SOIC, half-duplex 1/1 RS-485/RS-422 transceivers. The ADM1485JRZ-REEL supports data rates up to 30 Mbps, fully covering the original 10 Mbps requirement. Its 70 mV receiver hysteresis also offers better noise margin, though the increased hysteresis may affect signal edge response characteristics. Overall, this device is fully compatible and outperforms the original part. When substituting, only the circuit’s tolerance to the hysteresis change needs to be confirmed.
Analysis ID: 56D6-AFC8000
Based on part parameters and for reference only. Not to be used for procurement or production.
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