MC74AC540DWR2

Overview

The MC74AC540DWR2G is an octal buffer and line driver featuring three-state outputs, manufactured by onsemi. It operates within a supply voltage range of 2.0 V to 6.0 V for the AC series and provides inverted logic outputs. The device utilizes a flow-through architecture with inputs and outputs positioned on opposite sides of the package to facilitate microprocessor interface design. It supports output currents of ±24 mA and functions reliably across an ambient temperature range of -40°C to +85°C.

Feature Summary

• Features three-state outputs that allow direct connection to bus-oriented structures without additional drivers.
• Employs a flow-through pinout arrangement where inputs and outputs are located on opposite sides of the package.
• Provides inverted logic functionality suitable for memory address and data buffering applications.

Applications

• Memory and address drivers
• Clock drivers
• Bus-oriented transmitter/receivers

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm packaging type and lead-free status. Confirm the exact part number matches the required logic family variant. Ensure environmental compliance requirements align with the manufacturer's RoHS declarations before finalizing procurement specifications.

Selection Notes

Select this component when designing systems requiring octal buffering with high drive capability and low static power consumption. The flow-through architecture is optimal for maximizing printed circuit board density in microprocessor-based designs. Consider the AC series for wide voltage operation or ACT variants if TTL-compatible input thresholds are necessary.

Part Context

This device belongs to the MC74AC540/74ACT540 family of octal buffers and line drivers. It shares functional similarities with the MC74AC240 and MC74AC244 families but distinguishes itself through its specific flow-through pinout configuration. This architectural choice simplifies layout processes for high-density digital interfaces.

Replacement Considerations

MC74AC540DWG (Rail Packaging)

FAQ

What is the primary advantage of the flow-through architecture?

The flow-through architecture places inputs and outputs on opposite sides of the package, allowing easier interface to microprocessors and enabling greater printed circuit board density.

Does the MC74AC540 provide non-inverting or inverting outputs?

The MC74AC540 provides inverted outputs. The non-inverting option within this family is designated as the MC74AC541.