74F169SJ

Overview

The Fairchild Semiconductor 74F169SJ is a synchronous, positive edge-triggered 4-bit bidirectional binary counter belonging to the F/FAST series. It features internal carry look-ahead for high-speed counting applications and supports presettable modulo 16 operation. The device operates with a maximum frequency of 90 MHz and includes separate up/down clock inputs. It is housed in a 16-pin SOIC package (SOP16) and complies with RoHS standards.

Feature Summary

• Synchronous bidirectional counting with internal carry look-ahead
• Positive edge triggered operation
• Presettable modulo 16 capability

Applications

• High-speed counting designs
• Digital timing circuits
• Frequency division applications

Procurement Notes

Verify the manufacturer source, as ON Semiconductor acquired Fairchild's logic business. Confirm the specific suffix 'SJ' corresponds to the SOIC-16 package variant. Ensure compliance with current environmental regulations such as RoHS. Check for obsolescence status given the acquisition history.

Selection Notes

Select this component for applications requiring synchronous 4-bit up/down counting with high-speed performance. The internal carry look-ahead makes it suitable for cascading multiple counters without significant propagation delay. Ensure the design supports the required voltage range and load capacitance specifications.

Part Context

This part belongs to the 74F family of high-speed TTL-compatible logic devices. The 74F169 is specifically designed as a 4-bit synchronous up/down counter. It is functionally similar to other 74F series counters but distinguished by its bidirectional nature and presettable features.

Replacement Considerations

The 74F193SJ is a compatible alternative offering similar 4-bit bidirectional counting capabilities within the same F/FAST series.