DM74ALS541SJ

Overview

The DM74ALS541SJ is an octal buffer and line driver featuring 3-STATE outputs, manufactured by onsemi. It utilizes an Advanced oxide-isolated ion-implanted Schottky TTL process to deliver high-speed switching performance. The device operates within a supply voltage range of 4.5V to 5.5V and supports a free-air operating temperature from 0°C to +70°C. Propagation delays are guaranteed between 2ns and 14ns depending on the transition direction. The SOP package provides a data flow-thru pinout with inputs and outputs on opposite sides.

Feature Summary

• Features a data flow-thru pinout arrangement with inputs and outputs located on opposite sides of the package to enhance circuit board layout efficiency.
• Incorporates P-N-P inputs that reduce DC loading on driving circuits.
• Utilizes a 2-input NOR gate for 3-STATE control, placing all eight outputs in a high impedance state if either control input is HIGH.

Applications

• High-speed data bus buffering applications
• Line driving for communication interfaces
• Memory address/data bus drivers

Procurement Notes

Verify component authenticity through authorized channels as this part may be subject to obsolescence or lifecycle changes. Confirm the specific SOP package dimensions match your PCB footprint requirements. Ensure the design accommodates the recommended operating conditions, specifically the 4.5V to 5.5V supply voltage range and the 0°C to +70°C temperature limits for reliable operation.

Selection Notes

Select this component when a bidirectional or unidirectional octal buffer with high drive capability is required. The 3-STATE output feature allows multiple devices to share a common bus without interference. Consider the propagation delay specifications relative to your system clock speed. The specific SJ suffix indicates the 20-Lead Small Outline Package (SOP), which differs physically from SOIC or PDIP variants.

Part Context

This device belongs to the 74ALS logic family, known for advanced low-power Schottky performance. It serves as a direct functional replacement for standard 74LS541 buffers but offers faster switching speeds and lower power consumption. The octal configuration makes it suitable for wide data path applications requiring signal isolation or amplification.

Replacement Considerations

Check datasheets for SN74ALS541 equivalents from other manufacturers to ensure pin compatibility and electrical parameter alignment. Verify that alternative packages meet the same physical footprint constraints if the SOP form factor is mandatory.

FAQ

How does the 3-STATE control function operate?

The 3-STATE control is managed by two inputs, G1 and G2, configured as a 2-input NOR gate. If either G1 or G2 is HIGH, all eight outputs enter a high impedance state regardless of the data inputs.

What is the maximum supply voltage for this device?

The maximum recommended supply voltage (VCC) is 5.5V. Operating beyond this limit may damage the device.