MC74AC541DWR2G

Overview

The MC74AC541DWR2G is an octal buffer and line driver from the onsemi 74AC logic family. It features eight non-inverting inputs with three-state outputs, housed in a 20-SOIC surface-mount package. The device operates within a supply voltage range of 2 V to 6 V. Key electrical parameters include a high-level output current of -24 mA and a low-level output current of 24 mA. Propagation delay is specified at 8 ns at 3.3 V and 6 ns at 5 V. Static current is 8 uA, with a maximum power dissipation of 200 mW.

Feature Summary

• Provides eight non-inverting buffered channels with three-state output capability for bus isolation.
• Features a through architecture with inputs and outputs located on opposite sides of the package to facilitate microprocessor interface and PCB layout density.
• Delivers strong drive capability with 24 mA source and sink currents suitable for driving multiple loads.

Applications

• Memory address and data bus drivers
• Clock signal distribution and buffering
• Microprocessor output port interfacing

Procurement Notes

Verify the specific suffix DWR2G corresponds to the 20-SOIC tape-and-reel packaging configuration. Confirm RoHS compliance status and moisture sensitivity level (MSL 3) requirements against the target assembly process. Ensure the operating temperature range of -40°C to +85°C meets environmental specifications. Cross-reference the manufacturer part number with authorized distributor catalogs to validate authenticity and current production status.

Selection Notes

Select this component when an octal non-inverting buffer with three-state control is required for 2V to 6V CMOS applications. The through-package pinout distinguishes it from similar devices by simplifying trace routing between processors and peripherals. Consider the 24 mA drive strength for load requirements and the 8 ns propagation delay at 3.3 V for timing constraints. Compare against the inverting MC74AC540 variant if phase inversion is acceptable.

Part Context

This part belongs to the MC74AC540/541 series of octal buffers and line drivers manufactured by onsemi. It is functionally similar to the MC74AC240/244 series but utilizes a through architecture rather than a parallel input/output layout. This design choice specifically targets improved PCB density and easier integration with microprocessor systems. The AC series offers faster switching speeds compared to standard HC or HCT logic families while maintaining CMOS power efficiency.

FAQ

What is the difference between MC74AC541 and MC74AC540?

The MC74AC541 provides non-inverting outputs, whereas the MC74AC540 provides inverting outputs. Both share the same octal three-state structure and pinout.

How does the through architecture benefit circuit design?

The through architecture places inputs and outputs on opposite sides of the package, allowing for direct connection to microprocessor ports and reducing trace crossing complexity on the PCB.