SN74ALS561AN

Counter Dividers Overview

The SN74ALS561AN is a synchronous 4-bit binary counter manufactured by Texas Instruments in the ALS logic family. It features three-state outputs and supports both up and down counting directions triggered by positive-edge clocking. The device operates within a supply voltage range of 4.5 V to 5.5 V and functions across an industrial temperature range of 0°C to +70°C. It is housed in a 20-pin PDIP package.

Counter Dividers Feature Summary

• Synchronous 4-bit binary counting capability with dedicated up/down control
• Three-state output drivers for bus-oriented applications
• Positive-edge triggered clock input for precise timing synchronization

Counter Dividers Applications

• Digital frequency division circuits
• Binary sequence generation systems
• Timing control modules requiring synchronized state changes

Counter Dividers Procurement Notes

Verify the specific suffix 'AN' corresponds to the 20-pin PDIP package and commercial temperature grade. Confirm RoHS compliance status through the official datasheet or manufacturer notification, as legacy ALS parts may have varying environmental declarations. Ensure the source document matches the exact part number to avoid confusion with similar SN54 variants or different package options.

Counter Dividers Selection Notes

Select this component when a synchronous 4-bit counter with high-speed ALS performance and tri-state outputs is required. It is suitable for designs needing bidirectional counting (up/down) controlled by a single clock line. Consider the 20-pin DIP form factor for prototyping or through-hole assembly requirements where space constraints are less critical than ease of handling.

Counter Dividers Part Context

This part belongs to the Texas Instruments SN74ALS series, which offers faster switching speeds and lower power consumption compared to standard LS logic. The SN74ALS561A variant specifically provides 4-bit binary counting with three-state outputs, making it distinct from non-tri-state counters in the same family.

Counter Dividers Replacement Considerations

Check for SN74ALS561AP (plastic DIP) or SN74ALS561N (PDIP) equivalents. Verify pin compatibility and electrical specifications against SN54ALS561J for military-grade alternatives.