74F169SCX

Overview

The Fairchild Semiconductor 74F169SCX is a high-speed synchronous up/down binary counter belonging to the F/FAST logic series. It features a 4-bit architecture with bidirectional counting capabilities, allowing for both increment and decrement operations. The device operates in a synchronous mode triggered by positive clock edges and includes load/preset inputs for direct data entry. Packaged in a 16-lead Small Outline Integrated Circuit (SOIC), it supports standard TTL voltage levels and is designed for applications requiring reliable digital counting functions within industrial temperature ranges.

Feature Summary

• Synchronous bidirectional counting operation
• Direct presettable input capability
• High-speed F/FAST logic performance

Applications

• Digital frequency division circuits
• Programmable timing sequences
• Position control systems

Procurement Notes

Verify the specific suffix 'X' against the manufacturer's current documentation to confirm tape-and-reel packaging status. Ensure compatibility with existing board layouts regarding the SOIC package dimensions. Cross-reference RoHS compliance markings as per the latest datasheet revisions. Confirm that the operating temperature range meets the specific environmental requirements of the target application before finalizing procurement orders.

Selection Notes

Select this component when a synchronous 4-bit counter with bidirectional functionality is required. The F/FAST series offers higher speed compared to standard 74LS counterparts. Consider the SOIC package for surface-mount assembly needs. Verify that the supply voltage and input logic levels align with the system design constraints. Evaluate pinout compatibility if replacing legacy through-hole designs with modern surface-mount solutions.

Part Context

This part belongs to the widely used 74F logic family, known for fast propagation delays. The 74F169 variant specifically provides up/down counting, distinguishing it from unidirectional counters like the 74F161. Fairchild Semiconductor, now part of onsemi, produced this component for general-purpose digital logic applications. The SCX designation indicates the specific package type and reel configuration offered by the manufacturer.