74LVC245APW/AUJ

Overview

The NXP USA Inc. 74LVC245APW/AUJ is an octal bus transceiver with 3-state outputs, designed for bidirectional data transfer between two buses. It operates within a wide supply voltage range of 1.2 V to 3.6 V and features overvoltage tolerant inputs capable of accepting voltages up to 5.5 V, facilitating direct interfacing with 5 V logic in mixed-voltage environments. The device includes Schmitt-trigger action on all inputs to tolerate slow rise and fall times. It supports partial power-down applications via IOFF circuitry, which disables outputs to prevent damaging backflow currents when the device is unpowered.

Feature Summary

• Provides bidirectional data transmission across eight channels with non-inverting 3-state outputs controlled by OE and DIR pins.
• Features overvoltage tolerant inputs that accept voltages up to 5.5 V, enabling safe interfacing with 5 V logic systems while operating at lower supply voltages.
• Incorporates IOFF circuitry to support partial power-down modes, automatically disabling outputs to prevent backflow current during power loss.

Applications

• Mixed 3.3 V and 5 V voltage level translation
• Bidirectional data bus buffering
• Partial power-down system architectures

Procurement Notes

Verify the specific manufacturer designation, as Nexperia acquired NXP's Standard Products business. Confirm the package type matches the required footprint, typically TSSOP20 for the APW suffix. Ensure the order specifies the correct temperature grade if operation beyond standard industrial ranges is required. Cross-reference the ordering code against the latest Nexperia datasheet revision to confirm availability and compliance status.

Selection Notes

Select this component when designing systems requiring bidirectional data flow between buses operating at different voltage levels, specifically bridging 1.2 V to 3.6 V domains with 5 V interfaces. Consider the 74LVCH245A variant if bus hold functionality on data inputs is necessary to maintain stable states without external pull-ups or pull-downs. Evaluate the package options based on thermal dissipation requirements and board space constraints.

Part Context

This device belongs to the 74LVC family of high-speed CMOS logic products manufactured by Nexperia. It serves as a standard solution for general-purpose bidirectional bus communication in embedded systems. The component is widely used in consumer electronics, industrial control, and computing applications where reliable data transfer between microcontrollers and peripheral devices is essential.

Replacement Considerations

Direct functional equivalents include the 74LVCH245A series from Nexperia, which adds bus hold capabilities. Other manufacturers may offer pin-compatible alternatives such as the SN74LVC245 from Texas Instruments, though electrical characteristics and package dimensions should be verified against the original specification sheet before substitution.