MC74VHC1GT126DFT1G-Q

Overview

The MC74VHC1GT126DFT1G-Q is a single-gate noninverting three-state buffer from the VHC logic family, manufactured by onsemi. It operates within a supply voltage range of 2.0 V to 5.5 V and features TTL-level input thresholds. The device provides high noise immunity through buffered output structures and includes protection against over-voltage up to 5.5 V regardless of the supply voltage. It supports partial power down via IOFF and delivers source/sink currents of 8 mA at 3.0 V. The component is housed in an SC-88A package and is qualified under AEC-Q100 standards.

Feature Summary

• Features TTL-level input thresholds for direct interfacing with 5 V circuits while operating at lower voltages.
• Includes IOFF support to prevent excessive current draw during partial power-down states.
• Provides over-voltage tolerant inputs and outputs up to 5.5 V to protect against supply mismatches.

Applications

• Automotive electronic systems requiring AEC-Q100 qualification
• Level shifting between 5 V and 3 V logic domains
• Bus-oriented communications and data transmission

Procurement Notes

Verify that the ordering suffix matches the required automotive grade (-Q) and specific tape-and-reel packaging configuration (DFT1G). Confirm that the supplier provides documentation proving AEC-Q100 qualification and PPAP capability as mandated by the suffix requirements. Ensure the component lot corresponds to the designated manufacturing site specified for this qualified part number.

Selection Notes

Select this variant when TTL-compatible input thresholds are necessary for driving the buffer from 5 V sources. The -Q suffix indicates compliance with automotive quality standards and unique site control requirements. Choose the SC-88A package for compact surface-mount applications where space constraints are critical compared to larger footprint options.

Part Context

This component belongs to the MC74VHC1G126/MC74VHC1GT126 series of single-gate buffers. The GT designation specifically denotes TTL-level input thresholds, distinguishing it from the standard HC version which uses CMOS thresholds. The -Q suffix identifies it as an automotive-grade product meeting stricter reliability and change control criteria.

Replacement Considerations

MC74VHC1GT126DFT1G