MC74VHCT125ADR2G

Overview

The MC74VHCT125ADR2G is a quad buffer and line driver from the 74VHCT logic family, manufactured by onsemi. It features four non-inverting channels with three-state outputs in a 14-pin TSSOP package. The device operates within a supply voltage range of 2.0 V to 5.5 V. Key electrical specifications include an output current capability of 8 mA for both high and low states. Propagation delay varies with voltage: 36 ns at 2 V, 18 ns at 3 V, and 9 ns at 5 V. The static supply current is typically 4 µA, while maximum operating power dissipation is 450 mW. It supports an extended industrial temperature range from -55°C to +125°C.

Feature Summary

• Provides four independent non-inverting buffer channels with three-state output control for bus-oriented applications.
• Compatible with TTL voltage levels due to VHCT technology, enabling direct interface with 5 V CMOS and NMOS devices.
• Operates across a wide supply voltage range from 2 V to 5.5 V, supporting low-power system designs.
• Features high noise immunity and fast switching speeds suitable for high-frequency digital signal processing.

Applications

• Memory address and data bus drivers in embedded systems
• Clock distribution networks requiring precise timing and buffering
• I/O port expansion for microcontroller interfaces
• Signal isolation between different voltage domains

Procurement Notes

Verify the complete part number including the suffix 'ADR2G' to ensure correct packaging and lead-free compliance. Confirm RoHS status and material declarations via official manufacturer documentation before integration. Check for any recent product change notices affecting pinout or electrical characteristics. Ensure storage conditions meet moisture sensitivity level requirements for surface-mount assembly processes.

Selection Notes

Select this component when interfacing 5 V logic systems with lower voltage peripherals requiring TTL-compatible inputs. The VHCT series offers faster propagation delays than standard HC/HCT families while maintaining low power consumption. Consider the TSSOP-14 package constraints for PCB layout and thermal management. Evaluate the 8 mA drive strength against load capacitance requirements to ensure signal integrity at target frequencies.

Part Context

This device belongs to onsemi's 74VHCT logic family, designed for high-speed, low-power applications. It complements other buffers like the MC74VHC125 but adds TTL input compatibility. The 'A' variant often denotes improved performance or specific manufacturing revisions. It serves as a critical interface component in mixed-voltage digital circuits, bridging legacy 5 V standards with modern low-voltage logic families.

Replacement Considerations

Direct substitutes include MC74VHCT125ADTR2G (tape and reel) and MC74VHCT125ADWR2G (SOIC-16). Cross-family replacements like MC74HC125 require checking input voltage thresholds. Verify pinout compatibility and electrical parameters such as propagation delay and output current before substitution.