TC74HCT244AF(EL,F)

Overview

The TC74HCT244AF(EL,F) is an octal bus buffer manufactured by Toshiba Semiconductor and Storage. It belongs to the HCT logic series, featuring eight non-inverting channels with three-state outputs in a 20-pin TSSOP package. The device operates within a supply voltage range of 2.0V to 6.0V. Key electrical parameters include a propagation delay of 10ns, output currents of ±6mA, and a static current of 4µA. It supports surface mount installation and functions reliably across an operating temperature range from -40°C to +85°C.

Feature Summary

• Provides octal buffering with non-inverting signal transmission for data busses
• Features three-state outputs to isolate disconnected lines effectively
• Compatible with TTL input levels due to HCT logic family characteristics
• Designed for low power consumption while maintaining high-speed operation

Applications

• Data bus buffering in microprocessor systems
• Clock distribution networks requiring signal isolation
• Memory interface circuits for address and data lines
• Industrial control systems utilizing standard logic interfaces

Procurement Notes

Verify the specific ordering suffix EL,F against the manufacturer's latest datasheet to confirm packaging details such as reel size or tape width. Ensure the procurement channel provides original documentation matching the Toshiba Semiconductor and Storage part number. Cross-reference the RoHS status and moisture sensitivity level requirements with your assembly process specifications before finalizing orders.

Selection Notes

Select this component when an octal buffer with three-state capability is required for 5V or lower logic systems. The HCT series ensures compatibility with TTL-driven inputs, simplifying interface design between different logic families. Consider the TSSOP-20 package constraints for PCB layout and thermal management. Verify that the 10ns propagation delay meets the timing requirements of your specific application speed.

Part Context

This part is part of Toshiba's TC74HCT series of CMOS digital integrated circuits. It serves as an octal bus buffer, distinct from transceivers like the TC74HC245 which support bidirectional data flow. The HCT variant specifically targets applications needing TTL-compatible input thresholds combined with CMOS low-power advantages. It is commonly used in conjunction with other logic gates and memory devices in complex digital designs.

Replacement Considerations

Direct substitutes may include the TC74HC244AF(EL,F) if TTL input compatibility is not strictly required. Other manufacturers offer equivalent octal buffers in TSSOP-20 packages, but verify pinout compatibility and electrical specifications carefully. Always consult the official replacement guide from Toshiba Semiconductor and Storage for validated cross-references.