SN74HC540N

Buffers, Drivers, Receivers, Transceivers Overview

The SN74HC540N is an octal buffer and line driver with 3-state outputs manufactured by Texas Instruments. It operates within a supply voltage range of 2 V to 6 V, featuring high-current outputs capable of driving bus lines directly or up to 15 LSTTL loads. The device provides inverted data at the outputs and utilizes a 2-input NOR gate for 3-state control via OE1 and OE2 inputs. It offers low power consumption with a maximum ICC of 80 μA and typical propagation delay (tpd) of 8 ns. The component is housed in a 20-pin PDIP package.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Octal buffers and line drivers with 3-state outputs
• Wide operating voltage range from 2 V to 6 V
• High-current 3-state outputs drive bus lines directly
• Data flow-through pinout with inputs on opposite side from outputs

Buffers, Drivers, Receivers, Transceivers Applications

• Bus-oriented systems
• Clock buffering and distribution
• Memory module address/data drivers

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix against the manufacturer's current orderable addendum to confirm package type, lead finish, and moisture sensitivity level. Ensure the selected variant matches the required thermal resistance and operating temperature range for the intended application environment.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when an octal buffer with inverted logic and 3-state capability is required. The wide voltage range supports various digital logic families. Consider the PDIP package constraints for through-hole mounting and verify that the input transition times remain within specified limits to ensure proper operation.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the SNx4HC540 family of octal buffers and line drivers. It shares functional similarities with the 'HC240 series but features a distinct pinout arrangement with inputs and outputs on opposite sides of the package to facilitate printed circuit board layout.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

SN74HC540DW

Buffers, Drivers, Receivers, Transceivers FAQ

How does the 3-state control function operate?

The 3-state control gate is a 2-input NOR. If either output-enable (OE1 or OE2) input is high, all eight outputs enter a high-impedance state.

What is the logic polarity of the SN74HC540N?

The device provides inverted data at the outputs relative to the inputs.