MC74HC244ADTEL

Overview

The MC74HC244ADTEL is an octal 3-state non-inverting buffer and line driver manufactured by onsemi. It utilizes high-performance silicon-gate CMOS technology and operates within a supply voltage range of 2.0 V to 6.0 V. The device features eight inputs and eight outputs, providing drive capability for 15 LSTTL loads. Key electrical parameters include low input current of 1 μA and propagation delays ranging from 96 ns at 2 V to 15 ns at 6 V. It is housed in a TSSOP-20 package and supports industrial temperature ranges.

Feature Summary

• Octal configuration with independent output enable controls for flexible bus management
• CMOS inputs compatible with standard CMOS and LSTTL outputs when pull-up resistors are used
• High noise immunity characteristics inherent to CMOS devices
• Outputs directly interface with CMOS, NMOS, and TTL logic families

Applications

• Memory address driving in computer systems
• Bus-oriented transmissions requiring signal buffering
• Clock distribution circuits
• TTL to CMOS level translation interfaces

Procurement Notes

Verify the specific suffix ADTEL corresponds to the TSSOP-20 package and tape-and-reel orientation as defined in the official datasheet. Confirm RoHS compliance status and lead-free packaging details through manufacturer documentation. Ensure the ordering part number matches the exact pinout and electrical specifications required for the design.

Selection Notes

Select this component when an octal buffer with 3-state control is required for high-speed digital applications. The HC series offers a balance of speed and power consumption suitable for general-purpose logic interfacing. Verify that the operating voltage range of 2.0 V to 6.0 V aligns with the system power supply constraints.

Part Context

This component belongs to the 74HC family of high-speed CMOS logic devices. It serves as a direct pin-compatible replacement for older LS244 designs while offering improved switching speeds and lower power dissipation. The device is part of a broader portfolio of buffer and line drivers designed for complex digital systems.

Replacement Considerations

Check for equivalent parts such as MC74HC244ADT or MC74HC244ADWG if the TSSOP-20 reel packaging is unavailable. Ensure substitute components maintain the same 3-state functionality and voltage compatibility.