74LVCH245AD-Q100J

Overview

The Nexperia 74LVCH245AD-Q100J is an octal bus transceiver with 3-state outputs, designed for automotive applications. It operates within a supply voltage range of 1.2 V to 3.6 V and features 5 V tolerant inputs/outputs. The device includes Schmitt-trigger inputs, bus hold functionality on all data inputs, and IOFF circuitry for partial power-down mode operation. It complies with AEC-Q100 Grade 1 standards and JEDEC specifications for various voltage levels.

Feature Summary

• Automotive qualification in accordance with AEC-Q100 (Grade 1) for use in automotive applications
• Bus hold on all data inputs to maintain signal integrity without external components
• IOFF circuitry provides partial Power-down mode operation preventing damaging backflow current
• Schmitt-trigger action at all inputs makes the circuit tolerant of slower input rise and fall times

Applications

• Automotive electronic systems requiring robust logic interfacing
• Mixed 3.3 V and 5 V environments utilizing overvoltage tolerant inputs
• Partial power-down applications where backflow current prevention is critical

Procurement Notes

Verify the specific package variant against the ordering information table, as the AD suffix corresponds to the SO20 plastic small outline package (SOT163-1). Confirm that the Q100J suffix aligns with the required automotive grade and temperature range specifications (-40 °C to +125 °C). Ensure compatibility with the DHVQFN package options if space constraints require alternative form factors listed in the datasheet.

Selection Notes

Select this component when designing for automotive environments necessitating AEC-Q100 Grade 1 compliance. The LVCH family offers CMOS low-power consumption suitable for battery-operated or efficiency-critical systems. The inclusion of bus hold eliminates the need for external pull-up or pull-down resistors, simplifying PCB layout. Verify that the 5 V tolerance meets the interface requirements for legacy 5 V logic devices.

Part Context

This part belongs to the 74LVC/LVCH245A-Q100 series of octal bus transceivers. It shares functional similarities with the 74LVC245A-Q100 but distinguishes itself through the addition of bus hold circuitry on all data inputs. The series supports wide supply voltage ranges and is specified for extended industrial and automotive temperature ranges, ensuring reliability in harsh operating conditions.

Replacement Considerations

The 74LVC245AD-Q100J serves as a direct functional replacement for the 74LVC245AD-Q100J, differing primarily by the absence of bus hold features in the LVC variant. Designers must account for the potential need for external termination resistors when substituting the non-bus hold version.