74HC125D

Overview

The Toshiba 74HC125D is a high-speed CMOS quad bus buffer featuring non-inverted, three-state outputs. Fabricated using silicon gate C2MOS technology, it provides balanced propagation delays and operates within a wide voltage range of 2.0 to 6.0 V. The device requires the control input G to be set high to enable the output into a high-impedance state. It includes protection circuits against static discharge and transient excess voltage on all inputs.

Feature Summary

• High-speed operation with balanced propagation delays
• Wide operating voltage range from 2.0 V to 6.0 V
• Three-state outputs controlled by active-high input G
• Input protection circuits for static discharge

Applications

• Bus-oriented memory and signal switching
• Clock drivers
• Bus holding registers

Procurement Notes

Verify the manufacturer designation as Toshiba Semiconductor and Storage. Confirm the package type is SOIC-14. Ensure compliance with RoHS standards and check the specific revision date of the datasheet (Rev.4.0) to match design requirements. Validate that the part number matches the exact functional description of a quad bus buffer with active-high enable.

Selection Notes

Select this component when a non-inverting quad bus buffer with three-state capability is required. It is suitable for applications needing high-speed data transfer with low power dissipation. Consider the 2.0 V to 6.0 V supply range and -40°C to 125°C operating temperature. Compare with the 74HC126D if an active-low enable function is preferred instead.

Part Context

This component belongs to the 74HC series of high-speed CMOS logic integrated circuits. It is functionally similar to equivalent LSTTL devices but maintains CMOS low power dissipation characteristics. The 74HC125D is distinct from the 74HC126D primarily by its active-high enable requirement for the high-impedance state.

Replacement Considerations

The 74HC126D is a related variant; however, it requires the control input to be set low for the high-impedance state, unlike the 74HC125D which uses an active-high control.