MC74HC244AFL1

Overview

The MC74HC244AFL1 is an octal buffer and line driver from the HC logic series. It features eight non-inverting inputs with three-state outputs, housed in a 20-SOIC package. The device operates within a supply voltage range of 2 V to 6 V. Key electrical parameters include a low static current of 4 uA and output drive capabilities of -7.8 mA for high-level and 7.8 mA for low-level states. Propagation delay varies with voltage: 96 ns at 2 V, 50 ns at 3 V, 18 ns at 4.5 V, and 15 ns at 6 V. It supports surface mount installation and functions across temperatures from -55°C to +125°C.

Feature Summary

• Octal configuration providing eight independent non-inverting signal paths
• Three-state output control enabling bus-oriented communication
• Wide operating voltage range supporting 2 V to 6 V systems
• CMOS technology ensuring low static power consumption

Applications

• Bus-oriented architectures requiring signal buffering
• Clock drivers for timing distribution
• Memory address decoding circuits
• Carry propagation in arithmetic logic units

Procurement Notes

Verify the specific suffix FL1 against official datasheets to confirm the SOIC-20 package variant and tape-and-reel or bulk packaging details. Ensure compatibility with RoHS directives if required by your manufacturing standards. Cross-reference the part number with onsemi documentation to validate current production status and availability constraints before finalizing procurement plans.

Selection Notes

Select this component when designing systems requiring octal buffering with wide voltage tolerance between 2 V and 6 V. The HC series offers speed-performance balance suitable for general-purpose digital applications. Consider the 20-SOIC footprint for surface-mount assembly requirements. Evaluate propagation delays relative to system clock speeds to ensure timing margins are met under varying supply voltages.

Part Context

This part belongs to the MC74HC244 family of octal buffers. Similar variants include MC74HCT244ADWG for TTL-compatible interfaces and MC74LCX244A for low-voltage operations. These components share functional similarities but differ in input/output voltage tolerances and switching speeds. The HC series specifically targets applications needing CMOS performance with standard logic levels.

Replacement Considerations

Direct substitutes may include MC74HC244AFELG or MC74HC244AFLR depending on packaging preferences. Verify pinout compatibility and electrical specifications such as propagation delay and output current drive capabilities. Ensure that any replacement maintains the same three-state functionality and non-inverting polarity required by the circuit design.