SN74LS393D

Counter Dividers Overview

The SN74LS393D is a dual 4-bit binary counter manufactured by onsemi, housed in a 14-SOIC surface-mount package. It integrates two independent Modulo-16 counters within a single device. Each counter features an asynchronous clear input and negative-edge-triggered clock inputs. The component operates with a typical maximum count frequency of 50 MHz and includes input clamp diodes to minimize high-speed termination effects. It supports a supply voltage range of 4.75 V to 5.25 V and functions within an industrial temperature range of 0°C to 70°C.

Counter Dividers Feature Summary

• Integrates two independent 4-bit binary counters in a single package
• Features individual asynchronous clear inputs for each counter section
• Includes input clamp diodes to reduce high-speed termination effects

Counter Dividers Applications

• Digital counting circuits requiring dual independent channels
• Frequency division applications using ripple counter stages
• System timing signal generation from sub-multiples of input frequencies

Counter Dividers Procurement Notes

Verify the manufacturer marking on the component body to confirm it originates from onsemi rather than Texas Instruments, as the SN74LS393 part number is widely produced by multiple vendors. Ensure the suffix 'D' corresponds to the 14-SOIC package variant specified in the onsemi datasheet. Cross-reference the specific ordering code against current onsemi catalogs to confirm availability and exact electrical specifications for this manufacturing source.

Counter Dividers Selection Notes

Select this component when a design requires two separate 4-bit binary counters in a compact surface-mount footprint. It is suitable for applications needing asynchronous reset capabilities and moderate speed operation up to 50 MHz. Consider the 14-SOIC package dimensions for PCB layout constraints. Verify that the 5V logic family compatibility meets the system's voltage requirements before finalizing the selection.

Counter Dividers Part Context

This component belongs to the 74LS series of logic integrated circuits, which are based on Low-power Schottky TTL technology. The 74LS393 specifically provides dual 4-stage binary counting functionality. It is distinct from decade counters like the 74LS390, offering pure binary division ratios. The SOIC package allows for automated surface-mount assembly processes.

Counter Dividers Replacement Considerations

SN74LS393DR (Texas Instruments) offers identical logical function and pinout in a compatible SOIC package. MC74LS393ADR2G (onsemi) provides the same dual 4-bit binary counter functionality in a similar surface-mount form factor.