74LVC240AT20-13

Overview

The 74LVC240AT20-13 is an octal buffer and line driver with three-state outputs manufactured by Diodes Incorporated. It contains two independent four-bit buffers, each controlled by a separate output-enable (OE) input. The device operates within a supply voltage range of 1.65V to 3.6V and features inputs tolerant to 5.5V for mixed-voltage compatibility. It supports partial power-down applications via I_OFF circuitry to prevent backflow current. The component is housed in a TSSOP-20 package.

Feature Summary

• Provides two independent four-bit buffers with separate output-enable controls
• Features Schmitt trigger action at all inputs for noise immunity
• Includes I_OFF circuitry to disable outputs during partial power-down states
• Inputs accept up to 5.5V allowing direct interfacing with 3.3V or 5V systems

Applications

• Bus driving
• Power down signal isolation
• General purpose logic

Procurement Notes

Verify the specific ordering suffix 'T20' confirms the TSSOP-20 package variant rather than the QFN-20 option. Confirm RoHS compliance and lead-free status requirements match project specifications. Ensure ESD handling protocols are followed as the device includes protection tested per JESD standards. Validate that the operating temperature range meets environmental constraints.

Selection Notes

Select this component when designing circuits requiring octal buffering with high-impedance control capabilities. It is suitable for mixed-voltage environments where 5.5V tolerant inputs interface with lower voltage logic. Consider the TSSOP-20 package dimensions for PCB layout constraints. Verify that the required propagation delay characteristics align with system timing budgets across the specified temperature range.

Part Context

This part belongs to the 74LVC240A family of octal buffers and line drivers. It shares functional similarities with other LVC series devices but is distinguished by its eight-channel configuration and dual OE pins. The AT20 suffix specifically denotes the surface-mount TSSOP-20 package format, differentiating it from alternative packaging options like the QFN variant.

Replacement Considerations

The 74LVC240AQ20-13 serves as a package-compatible alternative using the V-QFN4525-20 footprint. Both variants share identical electrical characteristics and pin functions. Designers must verify PCB pad layouts differ between TSSOP-20 and QFN-20 packages before substitution.