IDT74LVC541AQG8

Overview

The IDT74LVC541AQG8 is an octal buffer/driver utilizing 0.5 micron CMOS technology, designed for industrial temperature ranges (-40°C to +85°C). It operates within a VCC range of 2.7V to 3.6V and features ±24mA output drive capability with rail-to-rail swing. The device includes two active-low output enable inputs (OE1, OE2) that control the high-impedance state. All inputs and outputs are 5V tolerant, supporting mixed voltage systems. Key electrical parameters include a maximum propagation delay of 5.6 ns at 2.7V and 5.1 ns at 3.3V, input capacitance of 4.5 pF typ., and quiescent current of 10 µA max.

Feature Summary

• Features 5V tolerant I/Os allowing operation in mixed 3.3V/5V system environments.
• Supports hot insertion and provides high-impedance states during power-up/down via pullup resistors.
• Inputs and outputs are positioned on opposite sides of the package to facilitate PCB layout.

Applications

• Driving bus lines or buffering memory address registers
• Data communication and telecommunication systems
• Mixed voltage translation between 5V and 3.3V domains

Procurement Notes

Verify the specific suffix 'QG8' corresponds to the QSOP-Green package variant as documented in the ordering information table. Confirm the operating temperature range matches the industrial specification (-40°C to +85°C) required for your application environment. Ensure ESD protection requirements align with the specified MIL-STD-883 levels.

Selection Notes

Select this component when driving moderate to heavy loads requiring ±24mA output current while maintaining speed performance. It is suitable for applications needing 5V tolerance on both inputs and outputs within a 3.3V logic family. Consider the QSOP package dimensions if board space constraints require a Quarter Size Small Outline Package.

Part Context

This part belongs to the LVC541A series of octal buffers/drivers from Integrated Device Technology (IDT), now part of Renesas Electronics. The series is characterized by low power consumption and compatibility with standard 3.3V CMOS logic families. The device serves as a bridge for signal buffering and level shifting in digital circuits.

Replacement Considerations

Compatible replacements include other 74LVC541 variants from manufacturers such as Texas Instruments (SN74LVC541A) or NXP, provided they support the same 2.7V-3.6V supply range, 5V tolerance, and industrial temperature specifications.

FAQ

How does the device handle the high-impedance state?

The device enters a high-impedance state when either OE1 or OE2 input is high. To ensure this state during power up or down, OE should be tied to VCC through a pullup resistor.

What is the input voltage tolerance?

All inputs and outputs are 5V tolerant, allowing them to be driven from either 3.3V or 5V devices without damage.