SN74LS191NSR

Counter Dividers Overview

The SN74LS191NSR is a synchronous 4-bit binary up/down counter manufactured by Texas Instruments. It operates within a supply voltage range of 4.75 V to 5.25 V and supports a maximum counting rate of 25 MHz. The device features positive-edge triggering and includes an asynchronous reset function. It is housed in a 16-SOIC surface-mount package with a width of 3.90 mm. The component functions as a single element with four bits per element, designed for operation across a temperature range of 0°C to 70°C.

Counter Dividers Feature Summary

• Synchronous 4-bit binary up/down counting capability controlled by a single clock line
• Positive-edge triggered flip-flops for precise timing synchronization
• Asynchronous reset functionality for immediate state clearing
• Surface-mount packaging suitable for automated assembly processes

Counter Dividers Applications

• Digital frequency division circuits
• Binary sequence generation systems
• Timing control logic in embedded devices

Counter Dividers Procurement Notes

Verify the specific suffix 'NSR' against official Texas Instruments documentation to confirm the reel-based packaging configuration and ensure compatibility with surface-mount assembly requirements. Confirm that the LS logic family specifications align with the target system's power and speed constraints before finalizing procurement orders.

Counter Dividers Selection Notes

Select this component when a synchronous 4-bit binary counter with up/down direction control is required in a surface-mount design. Ensure the application environment remains within the specified 0°C to 70°C operating temperature range and that the 5V supply voltage tolerance is maintained for reliable performance.

Counter Dividers Part Context

This part belongs to the SN74LS191 series of synchronous counters. It shares functional similarities with other members of the 74LS family but is distinguished by its specific SOIC-16 package and reel packaging format. It serves as a digital logic building block for sequential circuit designs requiring binary counting operations.

Counter Dividers Replacement Considerations

SN74LS169BD is listed as a parameter-equivalent alternative by distributors.