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-TSSOP
Transceiver, Non-Inverting 2 Element 8 Bit per Element 3-State Output 48-SSOP
1. 74FCT162H245ATPACT Substitution Conclusion
The 74FCT162H245ATPACT is fully compatible with the original 74FCT16245CTPAG8 in terms of logic function, supply voltage (4.5V–5.5V), and package (48-TFSOP), making it a viable drop-in replacement. The key difference lies in the output current drive: the TI device offers symmetrical 24mA sourcing/sinking capability, whereas the original part features asymmetric drive of 32mA (high) and 64mA (low). The reduced drive strength of the TI part—particularly the lower sink current drop from 64mA to 24mA—may lead to insufficient drive in high-load or high-speed applications, potentially affecting signal integrity and noise margin. If the target system operates within 24mA load current and meets timing requirements, this device can be substituted; otherwise, the drive capability must be evaluated against actual circuit demands.
2. 74FCT162H245ATPVC Substitution Conclusion
The 74FCT162H245ATPVC matches the original 74FCT16245CTPAG8 in logic function and supply voltage (4.5V–5.5V), but presents two critical differences: first, its output current is symmetrical 24mA (vs. original 32mA high / 64mA low), resulting in weaker drive; second, the package changes from 48-TFSOP (6.10mm width) to 48-BSSOP (7.50mm width). The altered pin layout and larger footprint may not be mechanically compatible, requiring PCB redesign and process adjustments, which increases substitution complexity and cost. Unless the system can accommodate a wider package and operates under light load conditions, this device is not recommended as a direct replacement.
Analysis ID: 7B15-9D1E000
Based on part parameters and for reference only. Not to be used for procurement or production.
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