74LVCH245APW,112

Overview

The Nexperia 74LVCH245APW,112 is an octal bus transceiver with 3-state outputs in a TSSOP20 package. It operates on a supply voltage range of 1.2 V to 3.6 V and features overvoltage tolerant inputs up to 5.5 V. The device includes Schmitt-trigger inputs for noise immunity and bus-hold functionality on all data inputs. It supports partial power-down via IOFF circuitry and complies with JEDEC standards for low-voltage applications.

Feature Summary

• Bus hold on all data inputs
• IOFF circuitry provides partial Power-down mode operation
• Overvoltage tolerant inputs to 5.5 V

Applications

• Mixed 3.3 V and 5 V environments
• Driving bus lines
• Buffer memory address registers

Procurement Notes

Verify the specific ordering suffix APW corresponds to the TSSOP20 plastic thin shrink small outline package (SOT360-1) as defined in the official Nexperia documentation. Confirm that the LVCH variant includes the bus-hold feature on data inputs, distinguishing it from the standard LVC version. Ensure the component status aligns with current production availability before finalizing procurement plans.

Selection Notes

Select this component when designing systems requiring bi-directional translation between mixed voltage domains, specifically 3.3 V and 5 V interfaces. The inclusion of bus-hold circuits eliminates the need for external pull-up or pull-down resistors on data lines. Verify that the TSSOP20 package dimensions fit the PCB layout constraints and that the operating temperature range meets the environmental requirements.

Part Context

This part belongs to the 74LVC/LVCH245A family of octal bus transceivers. The 'H' designation indicates the presence of bus-hold logic on the data inputs, which helps maintain signal states during high-impedance periods. It shares functional similarities with other 8-bit transceivers but offers specific low-voltage compatibility and input holding capabilities not found in standard CMOS variants.

Replacement Considerations

The 74LVC245APW,112 serves as a direct substitute if bus-hold functionality is not required. Other packages within the same family, such as SO20 or DHVQFN20, offer pin-compatible alternatives for different board space requirements.