QS74FCT191ATSO

Counter Dividers Overview

The QS74FCT191ATSO is a synchronous, presettable 4-bit up/down binary counter manufactured by Quality Semiconductor. It operates within the FCT logic series and supports bidirectional counting sequences controlled by external inputs. The device functions with a supply voltage range of 4.75 V to 5.25 V and is designed for industrial temperature environments ranging from -40°C to +85°C. It utilizes positive edge triggering for clock synchronization and is housed in a standard SOIC-16 surface-mount package.

Counter Dividers Feature Summary

• Synchronous 4-bit bidirectional counting capability
• Positive edge triggered operation
• Industrial temperature rating

Counter Dividers Applications

• Digital counting circuits
• Frequency division applications
• Timing control systems

Counter Dividers Procurement Notes

Verify the manufacturer designation carefully, as the base part number 74FCT191 is widely produced by multiple vendors including Texas Instruments and IDT. Confirm that the specific QS prefix corresponds to Quality Semiconductor Inc rather than other manufacturers using similar suffixes. Ensure the package type matches the required board layout specifications before finalizing procurement orders.

Counter Dividers Selection Notes

Select this component when a synchronous 4-bit counter with bidirectional functionality is required for industrial-grade applications. The FCT technology provides high-speed performance suitable for modern digital systems. Verify that the operating voltage requirements align with the 4.75 V to 5.25 V specification and that the SOIC-16 package fits the available PCB footprint constraints.

Counter Dividers Part Context

This component belongs to the 74FCT logic family, which combines CMOS low power consumption with TTL-compatible speeds. The 74FCT191 variant specifically implements a 4-bit synchronous counter with parallel load capabilities. Quality Semiconductor produces this device to meet industrial reliability standards while maintaining compatibility with standard logic interfaces.