MC74HC540ADTR2G

Overview

The MC74HC540ADTR2G is an octal inverting buffer and line driver manufactured by onsemi. It operates within a supply voltage range of 2.0 V to 6.0 V and supports an operating temperature from -55 °C to +125 °C. The device features two active-low output enables (OE1, OE2) that are ANDed together to control the high-impedance state. It utilizes a TSSOP-20 package with inputs and outputs located on opposite sides of the component body.

Feature Summary

• Octal inverting buffer design with inputs and outputs positioned on opposite package sides for efficient bus-oriented system routing.
• Dual active-low output enable pins (OE1 and OE2) that are internally ANDed to manage three-state logic levels.
• High noise immunity characteristics inherent to CMOS technology, ensuring stable operation in electrically noisy environments.

Applications

• Memory address drivers
• Clock drivers
• Bus-oriented systems

Procurement Notes

Verify the specific ordering suffix 'TR2G' corresponds to the TSSOP-20 package and tape-and-reel shipping configuration. Confirm RoHS compliance and lead-free status requirements match project specifications. Ensure the selected variant meets any automotive or unique site control requirements if applicable, as standard parts may differ from '-Q' suffix versions.

Selection Notes

Select this component when an octal inverting buffer with three-state capability is required for bus architectures. Consider the HC541A equivalent if non-inverting outputs are needed instead. Verify that the input drive capabilities align with the source logic family, noting that external pull-up resistors may be necessary for LSTTL compatibility.

Part Context

This part belongs to the MC74HC540A series of high-performance silicon-gate CMOS logic devices. It shares identical pinouts with LS540 equivalents, facilitating direct replacement in legacy designs. The device integrates 124 FETs or 31 equivalent gates, providing robust signal buffering for digital applications requiring wide voltage tolerance.

Replacement Considerations

The MC74HC541A serves as a functional alternative offering non-inverting outputs while maintaining similar electrical characteristics. For legacy replacements, the LS540 provides compatible pinout mapping. Verify that any substitute maintains the required 3-state functionality and voltage range specifications.