74LVC125ATTR

Overview

The STMicroelectronics 74LVC125ATTR is a low-voltage CMOS quad bus buffer featuring three-state outputs. It operates within a supply voltage range of 1.65V to 3.6V, with data retention supported down to 1.2V. The device provides high-speed performance with a maximum propagation delay of 4.8ns at VCC = 3V and 5.8ns at the upper voltage limit. It features 5V tolerant inputs and outputs, ensuring compatibility in mixed 3.3V/5V systems. The component includes power-down protection on inputs and outputs, symmetrical output impedance, and balanced propagation delays.

Feature Summary

• Features five-volt tolerant inputs and outputs for interfacing in mixed voltage environments.
• Includes power-down protection circuits on both inputs and outputs to prevent current leakage during power loss.
• Provides symmetrical output impedance and balanced propagation delays for signal integrity.

Applications

• Low-power and low-noise applications requiring high-speed buffering
• Mixed 3.3V and 5V system interfaces
• PCI bus level driving

Procurement Notes

Verify that the ordering suffix 'ATTR' corresponds specifically to the TSSOP-14 package type as documented in the official datasheet order codes. Confirm the manufacturer is STMicroelectronics. Ensure the component meets the specified operating temperature range of -55°C to +125°C for your application environment.

Selection Notes

Select this component when a quad non-inverting buffer with three-state control is required for low-voltage logic families. It is suitable for designs needing 5V tolerance on inputs while operating from a 3.3V or lower supply. Consider the TSSOP-14 package constraints and the specific speed requirements relative to the 4.8ns maximum delay at 3V.

Part Context

This part belongs to the 74LVC125A family of low-voltage CMOS quad bus buffers. It is pin and function compatible with the standard 74 series 125 devices but offers improved speed performance at 3.3V compared to the 5V AC/ACT family, combined with lower power consumption.

Replacement Considerations

Check for direct replacements such as the 74LVC125AMTR (SOP-14) if package differences are acceptable. Verify functional equivalence regarding the 5V tolerance and three-state control logic before substituting.