SN74LS390D

Counter Dividers Overview

The SN74LS390D is a dual 4-bit decade counter integrated circuit manufactured by Texas Instruments. It belongs to the SN74LS series of logic components and utilizes Low-power Schottky TTL technology. The device features two independent counters within a single package, each capable of asynchronous counting operations. It is designed for surface-mount installation in a 16-pin SOIC (Small Outline Integrated Circuit) package. The component operates within a standard voltage range of 4.75 V to 5.25 V and supports a commercial temperature range from 0°C to +70°C.

Counter Dividers Feature Summary

• Dual independent 4-bit decade counter architecture
• Asynchronous counting capability with negative-edge triggering
• Low-power Schottky (LS) TTL logic family integration
• Surface-mount packaging for automated assembly

Counter Dividers Applications

• Digital frequency division circuits
• Binary-coded decimal (BCD) counting systems
• Time-base generation for digital clocks
• Event sequence tracking in control logic

Counter Dividers Procurement Notes

Verify the specific suffix 'D' confirms the SOIC surface-mount package variant distinct from through-hole DIP versions. Confirm RoHS compliance status as manufacturing specifications may vary by production batch. Ensure the ordering part number matches the required pin configuration and thermal characteristics for the target PCB layout.

Counter Dividers Selection Notes

Select this component when a compact surface-mount solution for decade counting is required. The LS series offers a balance of speed and power consumption suitable for general-purpose digital logic. Consider the 16-pin SOIC footprint constraints during PCB design. Verify compatibility with existing 5V logic levels in the system architecture.

Counter Dividers Part Context

This component is part of the broader SN74LS family, which provides standardized logic functions for industrial applications. The SN74LS390 specifically addresses the need for dual decade counters in space-constrained designs. It serves as a functional alternative to other decade counters like the SN74LS90, differing primarily in package type and internal reset configurations.

Counter Dividers Replacement Considerations

The SN74LS390DR is a tape-and-reel version of the same die, offering identical electrical performance but different packaging for high-volume automated assembly. Cross-reference with SN74LS390N for through-hole requirements. Verify pinout compatibility before substituting with generic LS-series decade counters.