TC74HC393AF

Overview

The TC74HC393AF is a CMOS digital integrated circuit manufactured by Toshiba Semiconductor and Storage. It functions as a silicon monolithic dual binary counter, containing two independent 4-bit asynchronous counters within a single package. The device utilizes negative edge-triggered flip-flops to perform up-counting operations. It operates within a supply voltage range of 2 V to 6 V and supports a maximum counting frequency of 27 MHz at nominal supply conditions. The component is designed for surface-mount installation in a 14-pin SOIC package with a plastic/epoxy body.

Feature Summary

• Dual independent 4-bit binary counter architecture
• Asynchronous operation with negative edge triggering
• Wide operating voltage range supporting low-power applications

Applications

• Digital frequency division circuits
• Binary counting logic systems
• Timing sequence control modules

Procurement Notes

Verify the specific suffix 'AF' against the manufacturer's current datasheet to confirm pinout compatibility and RoHS status. Ensure the ordering documentation explicitly references Toshiba Semiconductor and Storage as the source. Confirm that the 14-SOIC package dimensions match the design requirements before finalizing procurement orders.

Selection Notes

Select this component when a dual-channel binary counting solution is required within a compact surface-mount footprint. The HC series offers standard speed performance suitable for general-purpose digital logic applications. Consider the 2 V to 6 V supply range compatibility with existing system power rails during the initial schematic design phase.

Part Context

This part belongs to the 74HC logic family, characterized by high-speed CMOS technology compatible with TTL inputs. The 74HC393 baseline designation indicates a dual 4-bit ripple counter configuration. Toshiba implements this standard logic function using their proprietary silicon monolithic process to ensure reliability across industrial temperature ranges.

Replacement Considerations

Cross-reference with other manufacturers offering the 74HC393 specification to verify pin-to-pin compatibility. Ensure substitute components maintain the same 14-SOIC package outline and electrical characteristics for direct board replacement.