Original Part
Alternative Part
1. ADM1485JRZ-REEL Substitution Conclusion
The ADM1485JRZ-REEL can fully replace the ST485ERBDR, as both devices are highly aligned in key specifications, including protocol (RS422/485), number of drivers/receivers (1/1), duplex mode (half-duplex), receiver hysteresis (70 mV), supply voltage range (4.75V to 5.25V), and package (8-SOIC). The primary difference lies in the data rate, which is significantly increased from 2.5 Mbps in the original part to 30 Mbps. The ADM1485JRZ-REEL supports higher-speed communication and is suitable for applications requiring high-bandwidth data transmission, such as industrial automation or high-speed networks. Since the data rate is a maximum capability specification, the device remains fully backward compatible at lower speeds and will not affect the functionality of the existing system. However, the higher performance headroom may lead to potential power consumption differences, and compatibility should be verified in the actual application.
2. ADM1485ARZ-REEL Substitution Conclusion
The ADM1485ARZ-REEL is also a viable replacement for the ST485ERBDR. Its parameters are essentially identical to those of the ADM1485JRZ-REEL, including protocol, package, supply voltage, and functional characteristics. Compared with the original part, the data rate is likewise increased from 2.5 Mbps to 30 Mbps. This substitution enables higher-speed RS422/485 communication, improving data transfer efficiency and making it suitable for high-speed or future upgrade requirements. Although the data rate difference is significant, the ADM1485ARZ-REEL matches the original device in both electrical characteristics and mechanical footprint, ensuring direct replacement feasibility. It should be noted that if the original system design was optimized only for 2.5 Mbps, the higher-speed capability may introduce signal integrity considerations; however, the device will operate stably in low-speed modes.
Analysis ID: B370-E0BD000
Based on part parameters and for reference only. Not to be used for procurement or production.
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