Original Part
Mixed Signal Translator Unidirectional 1 Circuit 2 Channel 8-SOIC
Alternative Part
1. MC100ELT22DG Substitution Conclusion
From the perspective of core functionality and package, the MC100ELT22DG is a highly viable direct replacement for the SY100ELT22LZG-TR. Both are unidirectional mixed-signal level translators that convert two single-ended signals into differential PECL outputs. They share the same 8-SOIC package and are pin-compatible. The key difference lies in the input level standard: the original part is specified for LVTTL, whereas the replacement is marked for TTL. This may result in a subtle discrepancy in input logic threshold voltages, as the minimum input high-level voltage (Vih) for TTL is typically higher than that for LVTTL. In a typical 5V system, LVTTL outputs are generally compatible with TTL inputs. However, under marginal voltage conditions—such as in a 3.3V system—careful verification is required to ensure the driving signal’s voltage swing meets the replacement part’s input requirements; otherwise, logic errors may occur. For designs operating at 5V with robust signal integrity, direct substitution is acceptable.
2. MC100ELT22DR2G Substitution Conclusion
The feasibility conclusion for substituting the SY100ELT22LZG-TR with the MC100ELT22DR2G is identical to that for the MC100ELT22DG—it is a usable direct replacement. These two parts are different reel packaging variants of the same die (the “R2” suffix typically denotes reel specification differences); their electrical characteristics, functionality, and package are exactly the same. The core distinction from the original part also involves the input level standard shifting from LVTTL to TTL. The considerations for substitution are precisely the same as those outlined for the MC100ELT22DG above: in the target application circuit, it is essential to verify that the voltage levels of the preceding driver signals satisfy the TTL input threshold requirements, particularly in lower-voltage or noisier operating environments. Provided this condition is met, the MC100ELT22DR2G can be regarded as a package-, function-, and pin-compatible alternative.
Analysis ID: BAFE-908A000
Based on part parameters and for reference only. Not to be used for procurement or production.
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