74F192SJ

Overview

The Fairchild Semiconductor 74F192SJ is a synchronous, positive edge-triggered 4-bit up/down decade counter belonging to the F/FAST logic series. It features separate clock inputs for counting up and down operations, along with parallel load capabilities. The device operates within a supply voltage range of 4.5 V to 5.5 V and supports a maximum frequency of 90 MHz. It is housed in a 16-pin SOIC package and complies with RoHS standards.

Feature Summary

• Synchronous operation triggered by positive edges on separate up and down clock inputs
• Decade counting capability from zero to nine with parallel data loading
• High-speed performance suitable for fast digital timing applications

Applications

• Digital countdown timers requiring precise decimal sequencing
• Frequency division circuits in communication systems
• Control logic for digital displays and instrumentation panels

Procurement Notes

Verify the specific suffix SJ indicates the SOIC-16 surface mount package configuration. Confirm RoHS compliance status matches current environmental regulations. Ensure the operating temperature range aligns with system thermal requirements. Cross-reference datasheet revisions to confirm pinout consistency with existing designs.

Selection Notes

Select this component when a synchronous decade counter is required instead of a binary counter. The separate up/down clocks simplify control logic compared to single-clock bidirectional counters. Verify that the 90 MHz speed meets the system clock requirements. Ensure the SOIC package fits the available PCB footprint constraints.

Part Context

This part belongs to the 74F series, known for high-speed CMOS-compatible logic. It serves as a decimal variant to the 74F193 binary counter. The F/FAST series provides faster switching speeds than standard 74LS counterparts while maintaining compatible logic levels.

Replacement Considerations

The 74F192SC is a similar device but typically packaged in DIP format. Verify package compatibility before substitution. Other 74F series counters may require logic modifications due to different counting bases or clock configurations.