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. 74ABT162245DLRG4 Substitution Conclusion
Conditional substitution. Special attention must be paid to package compatibility and potential differences in bus-hold functionality. This part is functionally identical to the original in terms of core logic (non-inverting, 2x8-bit, tri-state) and supply voltage. However, two key differences exist. First, the package is different: the original is a 48-TSSOP (6.10mm wide), while this part is a 48-SSOP (7.50mm wide). Their physical dimensions and footprints are incompatible, preventing direct soldering onto PCB pads designed for the original. A PCB layout redesign is mandatory for substitution. Second, the bus-hold feature is likely absent. The "H" in the original "ABTH" suffix typically denotes integrated bus-hold circuitry on the inputs. In contrast, TI's standard "ABT" series (unless explicitly noted) generally lacks this feature. Post-substitution, floating inputs may not maintain a defined logic state, potentially causing instability in bus applications. An assessment is required to determine if external pull-up or pull-down resistors are necessary.
2. 74ABT16245ADGGRG4 Substitution Conclusion
Highly viable and a superior pin-compatible direct replacement, though the bus-hold function difference still requires evaluation. This part is fully compatible with the original in core logic function, supply voltage, and package (48-TSSOP, 6.10mm wide), enabling direct physical replacement. Two differences are noted. First, the output drive capability differs. Its low-level output current (I_OL) is 64mA, significantly higher than the original's 12mA. This enhances its ability to drive heavy loads (e.g., multiple loads or long traces) and is generally considered a performance upgrade. However, ensure the power supply can handle the potentially higher transient currents. Second, similar to the part above, there is a risk of missing bus-hold functionality ("ABT" vs. "ABTH"). This is the most critical functional difference to consider during substitution. A thorough review of the application circuit is essential to determine if this difference is acceptable.
Analysis ID: 65B9-2E6F000
Based on part parameters and for reference only. Not to be used for procurement or production.
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