TC74ACT240F(EL,F)

Overview

The TC74ACT240F(EL,F) is an octal bus buffer with inverted, 3-state outputs manufactured by Toshiba Semiconductor and Storage. It utilizes advanced high-speed CMOS technology to achieve propagation delays of 5.0 ns typical at VCC = 5.0 V. The device operates within a supply voltage range of 4.5 V to 5.5 V and supports output currents of 24 mA minimum. Quiescent current is limited to 8.0 µA maximum at 25 °C. It features balanced propagation delays (tPLH ≈ tPHL) and is compatible with TTL outputs, specifically meeting VIL = 0.8 V max and VIH = 2.0 V min requirements.

Feature Summary

• Octal bus buffer with inverted, 3-state outputs
• High-speed operation comparable to Bipolar Schottky TTL
• Balanced propagation delays for signal integrity
• Input protection against static discharge or transient excess voltage

Applications

• 3-state memory address drivers
• Bus-oriented transmissions
• Clock drivers

Procurement Notes

Verify the specific ordering suffix (EL,F) corresponds to the SOP20 package and tape-and-reel packaging configuration as documented in the official Toshiba datasheet. Confirm that the component meets RoHS compliance standards required for your assembly process. Ensure the design accounts for the absolute maximum ratings, particularly regarding power dissipation and operating temperature ranges from -40 °C to +85 °C.

Selection Notes

Select this component when an octal buffer with inverted logic and 3-state control is required. It serves as a pin-compatible replacement for the 74F240 series while offering lower power consumption. Consider the 5.0 ns typical propagation delay and 24 mA drive capability for high-speed digital interfaces. Verify input voltage thresholds align with the driving source logic levels.

Part Context

This part belongs to the TC74ACT series of advanced high-speed CMOS logic integrated circuits. It shares functional compatibility with the 74F240/244 families but provides improved performance characteristics through silicon gate and double-layer metal wiring C2MOS technology. The device is designed to bridge the gap between standard CMOS speed and Bipolar Schottky TTL drive capabilities.

Replacement Considerations

The TC74ACT240F is functionally and pin-compatible with the 74F240. Designers replacing legacy 74F240 components should verify that the new supply voltage constraints (4.5 V to 5.5 V) are met by the system power rails.