74LVCH244APW/AUJ

Overview

The NXP USA Inc. 74LVCH244APW/AUJ is an octal non-inverting buffer and line driver featuring three-state outputs, manufactured by Nexperia under the 74LVCH series. It operates within a supply voltage range of 1.2 V to 3.6 V and utilizes a 20-lead TSSOP plastic thin shrink small outline package (SOT360-1). The device incorporates Schmitt-trigger action at all inputs for tolerance to slower rise and fall times. It supports partial power-down applications via IOFF circuitry and includes bus hold on data inputs.

Feature Summary

• Features two independent output enable inputs controlling four three-state outputs each, allowing configuration as two 4-bit buffers or one 8-bit buffer.
• Includes IOFF circuitry that disables outputs during partial power-down mode to prevent potentially damaging backflow current.
• Provides bus hold functionality on all data inputs to eliminate the need for external pull-up resistors for unused inputs.
• Inputs are overvoltage tolerant up to 5.5 V, enabling direct interfacing with 3.3 V or 5 V devices in mixed-voltage environments.

Applications

• Translators in mixed 3.3 V and 5 V logic environments
• Partial power-down applications requiring backflow protection
• Data bus buffering and line driving

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm the package type and temperature range. Ensure the component matches the required JEDEC compliance standards for your operating voltage. Confirm RoHS status and ESD protection ratings align with system requirements before procurement.

Selection Notes

Select this component when designing systems requiring octal buffering with three-state control and mixed-voltage compatibility. The LVCH series offers low-power CMOS consumption and wide supply voltage flexibility. Consider the TSSOP package dimensions and thermal dissipation characteristics for PCB layout constraints.

Part Context

This part belongs to the 74LVC/LVCH family of octal buffers and line drivers. It shares functional similarities with the 74LVC244A but adds bus hold features characteristic of the LVCH variant. The device is designed for high-speed digital applications requiring robust input tolerance and configurable output states.

Replacement Considerations

Check for equivalent parts from other manufacturers offering similar octal buffer configurations with three-state outputs and compatible voltage ranges. Verify pinout compatibility and electrical specifications such as propagation delay and output drive strength before substitution.