Original Part
Transceiver, Non-Inverting 2 Element 8 Bit per Element 3-State Output 48-TSSOP
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-TSSOP
1. CY74FCT16245TPVCT Substitution Conclusion
From a core logic functionality, voltage, and speed performance perspective, the CY74FCT16245TPVCT can serve as a full functional replacement for the original part. It features identical non-inverting transceiver functionality, bus width, tri-state outputs, and fully matched output drive currents (32mA / 64mA) and operating voltage. The key difference lies in the package: the original part uses a narrow-body 48-TSSOP (6.10mm width), while this TI variant is in a wide-body 48-SSOP (7.50mm width). In a direct replacement, the new device maintains the same physical footprint and pin pitch. However, its wider body may not fit within the layout space reserved for the narrow-body package on the original PCB, or it may cause mechanical interference with adjacent taller components. Therefore, a strict verification of PCB package compatibility is mandatory prior to substitution.
2. 74FCT162245ATPACT Substitution Conclusion
The 74FCT162245ATPACT is compatible with the original part in terms of basic logic function, supply voltage, and package (also narrow-body 48-TSSOP), providing a drop-in physical replacement. The primary deviation is in its output drive capability: it provides symmetrical 24mA current for both high and low output levels, whereas the original part features an asymmetric drive of 32mA (high) and 64mA (low). Consequently, the DC load driving capability of the substitute device, particularly its low-level fan-out or pull-down strength, is significantly reduced compared to the original part (low-level drive current drops from 64mA to 24mA). If the original design operates under high-load or long-line conditions and is close to the drive limits of the original device, this substitution may lead to signal integrity issues (e.g., slower rise/fall times, reduced noise margin) or timing problems. A thorough re-evaluation of the system's actual load conditions is essential before proceeding with the replacement.
Analysis ID: B32E-F8E9000
Based on part parameters and for reference only. Not to be used for procurement or production.
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