SN74LS393NG4

Counter Dividers Overview

The SN74LS393NG4 is a dual 4-bit binary counter integrated circuit manufactured by Texas Instruments. It belongs to the 74LS logic family and features two independent counters within a single package. Each counter operates as a modulo-16 ripple counter with asynchronous clear functionality triggered by a high signal on the Master Reset input. The flip-flops are negative-edge triggered, responding to HIGH-to-LOW transitions on the clock inputs. The device supports a supply voltage range of 4.75 V to 5.25 V and operates within a commercial temperature range of 0°C to +70°C. It is housed in a 14-pin SOIC surface-mount package.

Counter Dividers Feature Summary

• Contains two independent 4-bit binary counters capable of modulo-16 division
• Features asynchronous master reset inputs for immediate clearing of all outputs
• Utilizes negative-edge triggering for reliable clock synchronization

Counter Dividers Applications

• Digital frequency division circuits
• Binary counting applications requiring dual channels
• Timing sequence generation systems

Counter Dividers Procurement Notes

Verify the specific 'G4' suffix indicates lead-free compliance and RoHS status when sourcing. Confirm the package type matches the required PCB footprint, as this part uses an SOIC housing. Ensure the supply voltage remains strictly within the 4.75 V to 5.25 V range to maintain LS TTL performance specifications. Check for alternative suffixes if different packaging options are needed.

Counter Dividers Selection Notes

Select this component when dual independent binary counters are required in a compact surface-mount format. It serves as a direct replacement for standard SN74LS393 devices where lead-free manufacturing is mandated. Consider the 35 MHz typical count rate for speed requirements. Verify that the asynchronous clear logic aligns with the system's reset timing needs before finalizing the design.

Counter Dividers Part Context

This component is part of the Texas Instruments 74LS series, representing low-power Schottky TTL technology. It shares functional similarities with the SN74LS390 but provides binary rather than decade counting. The 'G4' designation typically denotes environmental compliance features such as lead-free pins and halogen-free materials, distinguishing it from standard industrial variants while maintaining identical electrical characteristics.

Counter Dividers Replacement Considerations

Direct substitutes include SN74LS393DR and SN74LS393NSR. These alternatives offer identical logical functions but may differ in packaging or manufacturer-specific revisions. Verify pin compatibility and electrical parameters before swapping.