MC74AC244DWG

Overview

The MC74AC244DWG is an octal buffer and line driver from the AC logic series, manufactured by onsemi. It features eight non-inverting channels with three-state outputs in a 20-pin SOIC surface-mount package. The device operates within a supply voltage range of 2V to 6V. Key electrical parameters include a maximum high-level output current of -24mA and a low-level output current of 24mA. Propagation delay is specified at 10ns. The component supports an operating temperature range from -40°C to +85°C.

Feature Summary

• Provides eight independent non-inverting signal paths for data buffering
• Integrates three-state output control for bus-oriented communication
• Utilizes silicon gate CMOS technology for low power consumption

Applications

• Bus-oriented systems requiring signal isolation
• Memory address drivers for data storage applications
• Clock distribution circuits in digital systems

Procurement Notes

Verify the specific suffix 'DWG' against the manufacturer's official datasheet to confirm the SOIC-20 package variant and tape-and-reel or tube packaging configuration. Ensure the order matches the exact part number to avoid confusion with similar AC series components that may have different pinouts or electrical characteristics. Cross-reference RoHS compliance status directly with the supplier documentation prior to procurement.

Selection Notes

Select this component when designing systems requiring eight buffered channels with high drive capability within a 2V to 6V supply range. The three-state output feature makes it suitable for multiplexed bus architectures where multiple devices share common data lines. Consider the propagation delay specifications relative to system clock speeds to ensure timing requirements are met without signal integrity issues.

Part Context

This part belongs to the MC74AC244 family of octal buffers. It serves as a non-inverting counterpart to the MC74AC240 inverter series. The AC series represents advanced CMOS technology offering higher speed performance compared to standard HC series devices while maintaining compatibility with TTL logic levels across the specified voltage range.

Replacement Considerations

MC74AC244DWR2G (Same Logic, Tape & Reel Packaging)

FAQ

What is the function of the three-state outputs?

The three-state outputs allow the device to be disconnected from the bus when not selected, enabling multiple devices to share the same data lines without electrical conflict.

Is the MC74AC244DWG inverting or non-inverting?

It is a non-inverting buffer, meaning the output signal maintains the same logical state as the input signal.