M74HCT540RM13TR

Overview

The M74HCT540RM13TR is an octal bus buffer with inverted 3-state outputs, fabricated using silicon gate C2MOS technology. It operates within a supply voltage range of 4.5V to 5.5V and supports an operating temperature from -55°C to 125°C. The device features balanced propagation delays (tPLH ≈ tPHL) and symmetrical output impedance with minimum drive currents of 6mA for both high and low states. Input thresholds are compatible with TTL standards, specifying a minimum VIH of 2.0V and a maximum VIL of 0.8V at the recommended operating conditions.

Feature Summary

• Octal inverting buffer architecture providing eight independent data paths
• Three-state control functionality utilizing two enable inputs (G1, G2)
• High-speed CMOS construction ensuring low power dissipation
• TTL-compatible input voltage levels for direct system interfacing

Applications

• Direct interface between HSC2MOS systems and TTL or NMOS components
• Bus-oriented memory and signal driving applications
• PC board layout optimization via opposite-side pinout configuration

Procurement Notes

Verify component authenticity through official STMicroelectronics channels or authorized distributors. Confirm package integrity and lead condition upon receipt. Ensure storage and handling procedures adhere to ESD protection guidelines specified in the datasheet. Cross-reference ordering codes to match specific packaging requirements such as tube or tape-and-reel formats.

Selection Notes

Select this component when designing circuits requiring octal buffering with inverted logic and three-state control capabilities. Consider the SO-20 package dimensions for PCB footprint planning. Evaluate thermal management needs based on the specified power dissipation limits and derating curves provided in the absolute maximum ratings section.

Part Context

This part belongs to the 74HCT series of advanced high-speed CMOS logic devices manufactured by STMicroelectronics. It serves as a functional equivalent to the standard 74540 octal bus buffer but utilizes HCT input compatibility. The RM13 suffix indicates the specific surface-mount SOIC-20 packaging variant designed for automated assembly processes.

Replacement Considerations

Public confirmed substitute part numbers: M74HCT540M1R, M74HCT540B1R, M74HCT540TTR.