M74HC126TTR

Overview

The M74HC126TTR is a high-speed CMOS quad bus buffer featuring three-state outputs, manufactured using silicon gate C2MOS technology. It operates within a wide supply voltage range of 2 V to 6 V and supports surface mount installation in a TSSOP-14 package. The device includes input protection against static discharge and transient excess voltage, ensuring stable operation across industrial temperature ranges from -40 °C to +125 °C.

Feature Summary

• Quad configuration with independent three-state control inputs for precise signal management
• High noise immunity provided by Schmitt-trigger-like input characteristics and ESD protection circuits
• Symmetrical output impedance ensures balanced propagation delays for reliable data transmission

Applications

• Clock distribution networks requiring controlled signal buffering
• Data bus drivers in microprocessor-based systems
• Voltage level translation between different logic families

Procurement Notes

Verify the specific ordering suffix matches the required tape and reel quantity. Confirm RoHS compliance status and automotive qualification if applicable. Ensure the TSSOP-14 package dimensions align with the target PCB footprint. Check for any recent product change notices affecting pinout or electrical characteristics before finalizing procurement.

Selection Notes

Select this component when a quad buffer with active-high enable control is required. The three-state capability allows multiple devices to share a common bus without interference. Consider the 2 V to 6 V operating range for compatibility with various logic levels. Verify that the TSSOP-14 package size fits the available board space constraints.

Part Context

This part belongs to the M74HC126 series of quad bus buffers. It is functionally compatible with standard 74HC126 logic but manufactured using STMicroelectronics' proprietary C2MOS process. The series offers high speed and low power consumption, making it suitable for battery-powered and high-density digital applications.

Replacement Considerations

Direct substitutes include SN74HC126PWR from Texas Instruments and 74HC126PW from Nexperia. These alternatives maintain pin compatibility and similar electrical specifications. Verify that the substitute's operating temperature range and ESD ratings meet the original design requirements.