74F162APC

Overview

The Fairchild Semiconductor 74F162APC is a synchronous decade counter belonging to the F/FAST logic series. It features a 4-bit binary-coded decimal counting architecture with positive edge triggering and an up-counting direction. The device operates within a TTL-compatible voltage range of 4.75V to 5.25V, ensuring reliable digital signal processing in standard logic environments. It utilizes a ceramic dual in-line package (CDIP-16) designed for through-hole mounting on printed circuit boards. The component includes load and preset inputs for flexible data initialization and management during operation.

Feature Summary

• Synchronous four-bit decade counting capability with positive edge triggering
• Integrated load and preset input functions for direct data control
• Ceramic dual in-line packaging providing robust physical protection

Applications

• Digital frequency division circuits
• Decimal-based timing sequence generation
• Control logic state sequencing

Procurement Notes

Verify the specific manufacturer designation, as Rochester Electronics also lists this part number. Confirm the CDIP-16 ceramic package variant matches system requirements. Check RoHS compliance status and lead content specifications against project constraints. Ensure the operating temperature range aligns with environmental conditions. Validate pinout compatibility before integration into existing designs.

Selection Notes

Select this component when a synchronous decade counter is required rather than a binary counter. The ceramic package offers superior durability compared to plastic variants in harsh environments. Verify that the 4.75V to 5.25V supply range fits the target power architecture. Consider the propagation delay characteristics if high-speed switching is necessary. Ensure the positive edge trigger requirement matches the system clock polarity.

Part Context

This integrated circuit belongs to the F/FAST logic family, which provides faster switching speeds compared to standard 74-series components. The decade counter function distinguishes it from general-purpose binary counters by resetting at count ten. The CDIP-16 package indicates a hermetically sealed ceramic construction suitable for high-reliability applications. This specific model represents a legacy component often used in established industrial and military electronic systems.

Replacement Considerations

The 74F161APC serves as a functional substitute but counts in binary rather than decimal. Verify that the alternative package type meets mechanical constraints. Ensure the replacement maintains the same synchronous triggering and voltage specifications.