Original Part
Alternative Part
1. SN75C3243PW Substitution Conclusion
The SN75C3243PW is compatible with the original ICL3243ECAZ in core functionality (3/5-channel full-duplex RS232 transceivers, supply voltage, and hysteresis). However, its data rate (1 Mbps) is significantly higher than that of the original part (250 kbps). Additionally, it is offered in a narrower 28-TSSOP package (4.40 mm wide), which is not directly footprint-compatible with the original 28-SSOP package (5.30 mm wide). Direct substitution requires re-evaluating PCB footprint compatibility. That said, the higher data rate can support faster communication requirements, and electrical characteristics are well-matched.
2. TRS3243ECDBR Substitution Conclusion
The TRS3243ECDBR is fully consistent with the original ICL3243ECAZ in terms of functional configuration, supply range, hysteresis, and package (28-SSOP). Its data rate (500 kbps) exceeds the original's 250 kbps, offering better performance compatibility. This device can be directly substituted on the existing PCB layout without hardware redesign, while providing additional communication rate margin. It represents an ideal drop-in replacement with enhanced performance.
Analysis ID: 2395-FCC0000
Based on part parameters and for reference only. Not to be used for procurement or production.
SkyChip © 2026, Email: sales@skychip.com