1. LTC2863HS8-1PBF Substitution Conclusion From a functional and package perspective, the LTC2863HS8-1PBF can serve as a high-performance upgrade option, but it is not a direct, drop-in pin-compatible replacement. The key differences are as follows: First, the data rate is significantly increased from 250 kbps to 20 Mbps. While this meets requirements for high-speed communication far exceeding the original part, the existing low-speed board layout must be reviewed to ensure signal integrity is maintained. Second, the supply voltage range is expanded from a single 5V rail (4.75V-5.25V) to a wide 3V to 5.5V range. This not only maintains compatibility with existing 5V systems but also allows direct use in 3.3V or other low-voltage systems, offering greater tolerance to supply variations. Third, receiver hysteresis is improved from 70 mV to 150 mV, which significantly enhances noise immunity and interference rejection, leading to more reliable communication in electrically noisy environments. Provided that pinout compatibility is confirmed (by cross-referencing both datasheets) and high-speed signal quality is assured, this device can replace the original component, delivering improved system performance and reliability.