DM74LS161AM

Counter Dividers Overview

The DM74LS161AM is a synchronous 4-bit binary counter manufactured by onsemi in a 16-lead Small Outline Integrated Circuit (SOIC) package. It features internal carry look-ahead for high-speed counting and diode-clamped inputs. The device operates with a supply voltage range of 4.75 V to 5.25 V and an operating temperature range of 0°C to +70°C. It utilizes positive-going edge triggering, asynchronous clear, and synchronous preset capabilities.

Counter Dividers Feature Summary

• Synchronous operation with simultaneous flip-flop clocking to eliminate output counting spikes
• Internal carry look-ahead circuitry enables n-bit cascading without additional gating
• Diode-clamped inputs provide protection against slow input rise times

Counter Dividers Applications

• High-speed synchronous counting designs
• N-bit cascaded counter applications
• Digital timing and sequencing circuits

Counter Dividers Procurement Notes

Verify the specific ordering suffix 'AM' corresponds to the SOIC package when sourcing replacements. Confirm RoHS compliance status as original datasheets may predate current environmental directives. Ensure the replacement component matches the 16-lead narrow SOIC physical dimensions and pinout configuration for direct board integration.

Counter Dividers Selection Notes

Select this component for applications requiring synchronous binary counting with fast propagation delays. The asynchronous clear function allows immediate reset independent of the clock signal. Verify that the load control line requirements align with the system's data setup and hold time constraints to ensure reliable preset operations.

Counter Dividers Part Context

This part belongs to the 74LS logic family, characterized by low-power Schottky technology. It is functionally similar to the DM74LS163A, differing primarily in the clear mechanism; the 161A uses asynchronous clear while the 163A uses synchronous clear. Both share identical counting and preset functionalities within the same package options.

Counter Dividers Replacement Considerations

Direct substitutes include the DM74LS163AM for synchronous clear functionality or other manufacturers' 74LS161 variants in SOIC packages. Verify pin compatibility and electrical characteristics before substitution.