CD74HC4049EE4

Overview

The CD74HC4049EE4 is a high-speed CMOS logic hex buffer manufactured by Texas Instruments. It operates within a supply voltage range of 2V to 6V and supports an operating temperature range from -55°C to 125°C. The device features a modified input protection structure allowing it to function as a high-to-low voltage level converter for inputs up to 16V while powered by low-level logic supplies. It provides six independent buffers, with the HC4049 variant configured as inverting buffers.

Feature Summary

• Modified input protection structure enables operation as a high-to-low voltage level translator for inputs up to 16V
• High noise immunity with defined thresholds relative to the supply voltage
• Capable of driving standard LSTTL loads without external components

Applications

• Logic level translation between high-voltage signals and low-voltage logic systems
• General-purpose buffering and inversion of digital signals
• Interface circuits requiring conversion of 15-V input pulse levels to 0-V to 5-V logic levels

Procurement Notes

Verify that the ordering suffix 'E4' corresponds to lead-free packaging compliant with RoHS standards. Confirm the package type matches the required PCB footprint, specifically the 16-pin PDIP configuration. Ensure the selected component meets the necessary environmental temperature ratings for the intended application environment.

Selection Notes

Select this component when interfacing high-voltage logic sources with lower voltage CMOS or TTL circuits. The HC4049 variant is appropriate for applications requiring signal inversion during the level translation process. Consider the wide operating temperature range if the device will be deployed in harsh industrial environments.

Part Context

This part belongs to the Texas Instruments 74HC series of high-speed CMOS logic devices. It is an enhanced version of equivalent older CMOS types, offering significant power reduction compared to LSTTL logic ICs. The device is designed to provide functionality similar to standard logic families while maintaining the low power consumption characteristics inherent to CMOS technology.

Replacement Considerations

CD74HC4049M96