Original Part
Transceiver, Non-Inverting 2 Element 8 Bit per Element 3-State Output 48-SSOP
Alternative Part
Transceiver, Non-Inverting 2 Element 8 Bit per Element 3-State Output 48-SSOP
Transceiver, Non-Inverting 2 Element 8 Bit per Element 3-State Output 48-SSOP
1. CY74FCT162245CTPVC Substitution Conclusion
The CY74FCT162245CTPVC is fully compatible with the original part in terms of logic function, bit width, package, and output type, establishing a foundation for pin‑for‑pin and functional replacement. The core difference lies in its operating voltage range of 4.5 V to 5.5 V (5 V system), compared to the original part’s 2.7 V to 3.6 V (3.3 V system), which introduces a significant level‑mismatch issue. Additionally, its output current is symmetrical at 24 mA for both high and low levels, providing stronger and more balanced drive capability than the original part’s 8 mA high‑level drive. If the target system operates at 5 V logic levels, this device can be directly substituted and will deliver enhanced output drive. However, if the original design is based on a 3.3 V supply, this part cannot be used directly due to voltage incompatibility; forced substitution may result in device malfunction or damage.
2. CY74FCT162245ATPVC Substitution Conclusion
The CY74FCT162245ATPVC shares identical basic parameters with the CTPVC version described above and is likewise functionally and pin‑compatible. Its key distinctions from the original part are also the 5 V operating voltage (4.5 V–5.5 V) and symmetrical 24 mA output drive. According to TI’s naming convention, the suffix “A” typically indicates integrated power‑up/power‑down three‑state output control and bus‑hold circuitry, which is a significant additional feature. For substitution, it is likewise suitable only for 5 V systems and cannot be used in a 3.3 V environment. However, its bus‑hold function maintains the last valid logic state when the input pins are floating, improving system stability during bus‑float conditions—a capability not present in the original part or the CTPVC version. In 5 V system applications, it is not only a viable replacement but may also offer improved noise immunity.
Analysis ID: EDE7-F948000
Based on part parameters and for reference only. Not to be used for procurement or production.
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