MC74VHC1GT50DFT1G-Q

Overview

The MC74VHC1GT50DFT1G-Q is a single-channel, non-inverting buffer manufactured by onsemi in the VHC logic family. It operates within a supply voltage range of 2.0 V to 5.5 V and features TTL-level input thresholds. The device provides over-voltage tolerant inputs and outputs up to 5.5 V, enabling safe interfacing between 3 V and 5 V circuits. It supports partial power-down protection via IOFF and delivers source/sink currents of 8 mA at 3.0 V. Packaged in SC-88A (SOT-353), it is qualified under AEC-Q100 standards.

Feature Summary

• Features TTL-level input thresholds for direct compatibility with standard digital logic families.
• Provides robust protection against supply voltage mismatches through over-voltage tolerant I/O structures.
• Supports partial power-down mode to prevent excessive current draw during system standby states.

Applications

• Interfacing 3 V logic circuits with 5 V peripheral devices
• Address bus drivers in portable electronic equipment
• Clock signal buffering in high-speed data transmission systems

Procurement Notes

Verify that the suffix '-Q' corresponds to the specific automotive qualification requirements and unique site control changes mandated by the application. Confirm the package marking aligns with the SC-88A pinout orientation specified in the datasheet ordering information table. Ensure compliance with RoHS and halogen-free material declarations as stated in the product specifications.

Selection Notes

Select this component when TTL-compatible input thresholds are required alongside CMOS output drive capabilities. The SC-88A package offers a compact footprint suitable for space-constrained designs. Consider the AEC-Q100 qualification if the deployment environment demands automotive-grade reliability and extended temperature performance.

Part Context

This part belongs to the MC74VHC1G50/1GT50 series of advanced high-speed CMOS buffers. The 'T' designation specifically indicates TTL-level input thresholds, distinguishing it from the 'G' variant which utilizes CMOS-level thresholds. Both variants share identical electrical characteristics regarding speed, drive strength, and packaging options.

Replacement Considerations

MC74VHC1GT50DFT2G-Q

FAQ

What distinguishes the MC74VHC1GT50 from the MC74VHC1G50?

The primary difference lies in the input threshold levels; the MC74VHC1GT50 features TTL-level input thresholds, whereas the MC74VHC1G50 uses CMOS-level input thresholds.

How does the device handle partial power-down conditions?

The device incorporates an IOFF feature that supports partial power-down protection, limiting leakage current when the supply voltage is removed or low.