MC74LCX540DTG

Overview

The MC74LCX540DTG is an octal bus driver manufactured by onsemi, belonging to the LCX logic family. It features eight non-inverting buffers with three-state outputs housed in a 20-pin TSSOP package. The device operates within a supply voltage range of 2.0 V to 3.6 V and supports industrial temperature ranges from -40°C to +85°C. Key electrical characteristics include a propagation delay of approximately 14 ns at 3.3 V and output drive capabilities of ±24 mA. This component is designed for low-voltage CMOS applications requiring high-speed data transmission.

Feature Summary

• Provides eight independent non-inverting buffer channels for signal conditioning
• Features three-state outputs to facilitate bus-oriented architectures
• Operates across a wide low-voltage supply range suitable for portable systems
• Supports direct interface between 5-V and 3.3-V devices

Applications

• Bus-oriented memory and address drivers
• Clock distribution and buffering
• Data register and I/O control circuits
• Mobile and handheld equipment power management

Procurement Notes

Verify the specific suffix 'DTG' confirms the TSSOP-20 package and lead-free status. Confirm RoHS compliance requirements against current environmental directives. Ensure the operating temperature range meets system specifications. Validate pinout compatibility during PCB layout integration. Check for any recent product change notices affecting manufacturing or sourcing.

Selection Notes

Select this component when designing systems requiring octal buffering with three-state control. It is appropriate for applications needing interface between different voltage domains. Consider the propagation delay and drive current for signal integrity. Evaluate package size constraints against available board space. Compare performance metrics with alternative LCX series devices for optimal cost and function.

Part Context

This part belongs to the MC74LCX series of low-voltage CMOS logic devices. The series is characterized by high speed and low power consumption. It serves as a successor to older LVC and LCZ families. The octal configuration allows for efficient handling of parallel data buses. It is widely used in consumer electronics and industrial control systems.

Replacement Considerations

Compatible substitutes include MC74LCX540DTR2 (tape and reel) and MC74LCX540MTC (TSSOP variant). Verify functional equivalence regarding voltage levels and drive strength. Ensure package dimensions match existing footprints. Check for availability of lead-free versions if required.