SN74ALS561ADWR

Counter Dividers Overview

The SN74ALS561ADWR is a synchronous 4-bit binary counter manufactured by Texas Instruments in the ALS logic series. It features positive edge triggering and operates within a supply voltage range of 4.5 V to 5.5 V. The device is housed in a 20-SOIC package and supports up-counting operations. Designed for surface-mount installation, it functions reliably across an operating temperature range from 0°C to +70°C, providing digital counting capabilities for embedded systems requiring TTL-compatible inputs.

Counter Dividers Feature Summary

• Synchronous 4-bit binary counting architecture with positive edge triggering
• TTL-compatible input interface for direct integration with standard logic families
• Up-counting direction capability for sequential data processing

Counter Dividers Applications

• Digital frequency division circuits
• Sequential control logic in embedded systems
• Address generation in memory interfaces

Counter Dividers Procurement Notes

Verify the component status as obsolete through official Texas Instruments channels before procurement planning. Confirm the specific suffix 'DWR' corresponds to the tape and reel packaging format required for automated assembly processes. Ensure compatibility with existing PCB footprints designed for the 20-SOIC package dimensions.

Counter Dividers Selection Notes

Select this component when a synchronous 4-bit up-counter with TTL inputs is required in an ALS series environment. Consider the positive edge trigger characteristic for timing synchronization needs. Evaluate the 20-SOIC package constraints against available board space and thermal management requirements for the target application.

Counter Dividers Part Context

This part belongs to the Texas Instruments 74ALS family, known for high-speed performance and reduced power consumption compared to earlier logic standards. The SN74ALS561 specifically addresses applications requiring reliable binary counting with synchronous operation, distinguishing it from asynchronous ripple counters in terms of timing predictability and noise immunity.

Counter Dividers Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Due to the obsolete status indicated in third-party sources, verify current availability and potential obsolescence risks directly with the manufacturer or authorized distributors.