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-SSOP
1. SN74ABT162245DLG4 Substitution Conclusion
This device is fully compatible with the original part in terms of core logic function (non-inverting, 2x8-bit, tri-state) and supply voltage. However, a critical difference exists in its output drive capability. The original part provides asymmetric drive (32mA high, 12mA low), whereas the drive strength of this TI variant differs under various conditions (one set is symmetric at 12mA/12mA, the other is 32mA/64mA). If the original circuit design relies on the original part's stronger low-level sink current (12mA), substituting with the TI part's 12mA/12mA mode may result in insufficient low-level drive. This could lead to an elevated output low voltage (VOL) when driving heavy loads, posing a system reliability risk. Additionally, the package has changed from a 48-TFSOP to a wider 48-BSSOP, requiring verification of PCB layout clearance and pinout compatibility. Substitution is acceptable only if the load current requirement is confirmed to be low and the package is compatible; otherwise, risk remains.
2. SN74ABTH16245DLG4 Substitution Conclusion
This device is compatible with the original part in core logic function and supply voltage. Its output drive capability (32mA high, 64mA low) is comprehensively superior to or equal to the original (32mA, 12mA), with significantly stronger low-level sink current in particular. This means the replacement offers greater noise margin and more reliable logic low levels when driving the same load, representing a performance safety margin improvement. The "H" suffix in the part number typically indicates bus-hold functionality, aligning it more closely with the original part's characteristics. The primary difference again lies in the package dimensions, changing from a 48-TFSOP to a wider 48-BSSOP. Provided the physical installation space is adequate and the pinout is confirmed to be identical, this device is a superior and lower-risk direct replacement option.
Analysis ID: 06B0-87A4000
Based on part parameters and for reference only. Not to be used for procurement or production.
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