Original Part
Alternative Part
1. SN65LBC176ADR Substitution Conclusion
The SN65LBC176ADR is functionally similar to the original ISL4485EIBZ-T, both being half-duplex RS422/RS485 transceivers in the same package (8-SOIC). However, key differences exist: its receiver hysteresis is lower (50 mV vs. 70 mV), which reduces noise immunity and may increase bit error risk in high-noise environments; the data rate is higher (30 Mbps vs. 20 Mbps), offering greater communication bandwidth, though this provides no practical benefit if the system only requires 20 Mbps; and the supply voltage range is narrower (4.75 V–5.25 V vs. 4.5 V–5.5 V), imposing stricter supply stability requirements and potentially causing operational instability under significant voltage fluctuation. If the system supply is stable above 4.75 V and the noise environment is well-controlled, the SN65LBC176ADR can be substituted, but noise immunity and supply compatibility must be evaluated.
2. ISL3158EIBZ-T Substitution Conclusion
The ISL3158EIBZ-T is from the same manufacturer as the original ISL4485EIBZ-T, with identical package, data rate (20 Mbps), and supply voltage range (4.5 V–5.5 V). However, its receiver hysteresis is significantly lower (20 mV vs. 70 mV), resulting in substantially degraded noise immunity. In noisy environments, it becomes highly susceptible to interference, which can lead to frequent false triggering and reduced communication reliability. Unless the application operates in an extremely low-noise environment with relaxed hysteresis requirements, the ISL3158EIBZ-T is not suitable for direct substitution of the ISL4485EIBZ-T, especially in industrial or high-noise settings, where substitution would likely compromise system robustness.
Analysis ID: DD7A-7FC1000
Based on part parameters and for reference only. Not to be used for procurement or production.
SkyChip © 2026, Email: sales@skychip.com