SN74ALS561ANG4

Counter Dividers Overview

The SN74ALS561ANG4 is a synchronous 4-bit binary counter manufactured by Texas Instruments, belonging to the 74ALS logic family. It features four data inputs and three-state outputs housed in a 20-pin PDIP package. The device operates within a supply voltage range of 4.75 V to 5.25 V. Key electrical characteristics include a maximum operating frequency of 80 MHz at 5 V and a propagation delay of 10 ns. It requires a static current of 6 mA and supports positive-edge triggering for reliable digital counting applications.

Counter Dividers Feature Summary

• Synchronous 4-bit binary counting capability with dedicated clock input
• Three-state outputs allowing direct bus interfacing without external buffers
• Positive-edge triggered operation ensuring precise timing synchronization
• High-speed performance suitable for demanding digital logic systems

Counter Dividers Applications

• Digital frequency division circuits
• Event counting systems
• Timing sequence generation
• Address decoding in memory systems

Counter Dividers Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm the specific ordering suffix matches the required package and temperature grade. Check current availability status as this part may be discontinued or subject to long lead times. Ensure proper handling procedures are followed due to electrostatic sensitivity inherent to CMOS-based logic families.

Counter Dividers Selection Notes

Select this component when synchronous 4-bit counting with high-speed performance is required. The ALS series offers a balance between speed and power consumption compared to standard TTL or older LS variants. Consider the three-state output feature if bus sharing is necessary. Verify that the operating voltage and temperature ranges align with the system design requirements before finalizing the selection.

Counter Dividers Part Context

This component is part of the Texas Instruments 74ALS (Advanced Low-power Schottky) logic family, designed for high-speed digital applications. It serves as a fundamental building block for sequential logic circuits. The SN74ALS561A variant provides synchronous counting functionality, distinguishing it from asynchronous counters. The 'G4' suffix typically indicates a lead-free and RoHS-compliant manufacturing process.

Counter Dividers Replacement Considerations

Direct substitutes include the SN74ALS561AN and SN74ALS561ANG4. Cross-reference with other manufacturers' ALST series counters if pin compatibility is critical. Ensure functional equivalence regarding propagation delay and output drive strength when evaluating alternatives.