MC74HCT244AFEL

Overview

The MC74HCT244AFEL is an octal 3-state non-inverting buffer and line driver manufactured by onsemi. It operates within a supply voltage range of 4.5 V to 5.5 V. The device features eight input lines and eight output lines, housed in a 20-SOIC package. Key electrical specifications include a high-level output current of -6 mA and a low-level output current of 6 mA. Static current is specified at 4 uA, with a maximum operating power supply current of 160 uA. Propagation delay is 20 ns at 5 V. The component supports surface mount installation and functions within a temperature range of -55°C to +125°C.

Feature Summary

• Provides octal buffering with three-state output capability for bus-oriented systems
• Compatible with TTL logic levels due to HCT series design
• Supports wide industrial operating temperatures up to 125°C

Applications

• Interfacing between TTL and NMOS logic families
• Level conversion applications
• Bus-oriented memory and signal driving

Procurement Notes

Verify the specific suffix 'FEL' against the manufacturer's latest datasheet to confirm pinout compatibility and package dimensions. Ensure the procurement source provides valid RoHS compliance documentation. Cross-reference the part number with official onsemi databases to distinguish it from similar variants like the MM74HCT244MTC or MC74HCT244ADWG, as packaging and thermal characteristics may differ significantly between SOIC and TSSOP formats.

Selection Notes

Select this component when an octal buffer with three-state outputs is required for 5V CMOS logic systems. It serves as a direct pin-compatible replacement for LS244 devices, facilitating easier upgrades from older logic families. Consider the 20-SOIC package constraints and the -55°C to +125°C temperature range if deploying in harsh environments. Verify that the 6 mA drive current meets the load requirements of the connected circuitry.

Part Context

This part belongs to the 74HCT logic family, designed for high-speed CMOS operation with TTL-compatible inputs. The MC74HCT244AFEL variant specifically utilizes a 20-SOIC (SOEIAJ) package. It is functionally identical to the standard MC74HCT244A but distinguished by its specific tape-and-reel or bulk packaging configuration indicated by the suffix. It falls under the broader category of buffers, drivers, receivers, and transceivers offered by onsemi.

Replacement Considerations

MM74HCT244MTC

FAQ

Is the MC74HCT244AFEL compatible with LS244?

Yes, the datasheet states that the MC74HCT244A is identical in pinout to the LS244.

What is the propagation delay of this device?

The propagation delay is 20 ns at 5 V.