74LVC540AT20-13

Overview

The 74LVC540AT20-13 is an octal inverting buffer and line driver manufactured by Diodes Incorporated. It operates within a supply voltage range of 1.65V to 3.6V and features three-state outputs controlled by two active-low enable inputs (OE1, OE2). The device provides high output current capability, sinking or sourcing up to 24mA at VCC = 3V. Inputs are tolerant to 5.5V, facilitating mixed-voltage applications. It includes I_OFF circuitry for partial power-down support and Schmitt trigger action at all inputs.

Feature Summary

• Features inputs and outputs on opposite sides of the package to facilitate printed circuit board layout.
• Includes I_OFF circuitry that disables outputs to prevent damaging current backflow during partial power-down operations.
• Inputs accept voltages up to 5.5V, allowing compatibility with 3.3V or 5V driving sources in mixed-voltage environments.
• Provides Schmitt trigger action at all inputs to improve noise immunity.

Applications

• Bus driving
• Buffering memory address registers
• Power down signal isolation

Procurement Notes

Verify the specific package code T20 corresponds to the TSSOP-20 form factor when ordering. Confirm the -13 suffix indicates 13-inch tape and reel packaging. Ensure the design supports the required 5.5V input tolerance if interfacing with higher voltage logic levels. Check thermal resistance specifications against the PCB layout requirements for the TSSOP-20 package.

Selection Notes

Select this component for designs requiring octal buffering with inverted logic and three-state control. It is suitable for low-power CMOS applications operating between 1.65V and 3.6V. Consider the 5.5V input tolerance for interfaces involving 5V logic systems. Verify that the TSSOP-20 package dimensions fit the available footprint on the target printed circuit board.

Part Context

This part belongs to the 74LVC logic family, which is designed for low-voltage operation. The 74LVC540A variant specifically provides eight inverting buffers with three-state outputs. Diodes Incorporated manufactures this series to support general-purpose logic and bus driving applications in portable and computing devices.

Replacement Considerations

Compatible substitutes include other manufacturers' 74LVC540 parts in TSSOP-20 packages. Verify pinout compatibility and electrical characteristics such as propagation delay and output current before substitution.

FAQ

How does the device handle partial power-down scenarios?

The device features I_OFF circuitry that disables the outputs to prevent damaging current backflow when the device is powered down.

What is the function of the OE1 and OE2 pins?

OE1 and OE2 are active-low output enable inputs. If either input is high, all eight outputs enter a high-impedance state.