SN74LS390NSR

Counter Dividers Overview

The SN74LS390NSR is a dual 4-bit decade and binary counter from the Texas Instruments 74LS series. It operates on a single supply voltage ranging from 4.75 V to 5.25 V. The device features asynchronous reset functionality and negative edge triggering for both counters. It is housed in a 16-SOIC surface-mount package with a width of 0.209 inches (5.30 mm). The component supports an operating temperature range from 0°C to +70°C and includes independent clock inputs for each counter section.

Counter Dividers Feature Summary

• Dual independent 4-bit counting sections capable of decade or binary operation
• Asynchronous reset mechanism for immediate output clearing
• Negative edge triggered clock inputs for precise timing control
• Surface-mount packaging designed for automated assembly processes

Counter Dividers Applications

• Digital frequency division circuits
• Timekeeping systems requiring decimal counting
• Pulse generation and sequencing logic
• Binary-coded decimal display drivers

Counter Dividers Procurement Notes

Verify the specific suffix 'SR' indicates tape-and-reel packaging distinct from tube variants. Confirm RoHS compliance status matches current manufacturing standards. Ensure the SOIC-16 footprint aligns with PCB layout requirements. Check for lead-free soldering compatibility during assembly.

Counter Dividers Selection Notes

Select this part when dual independent counters are required in a compact surface-mount form factor. Compare against SN74LS390N for through-hole alternatives if manual assembly is preferred. Consider SN74LS393 if binary-only counting without decade decoding is sufficient for the design.

Counter Dividers Part Context

This component belongs to the standard 74LS logic family, known for low-power Schottky TTL performance. It shares functional pinouts with legacy designs while offering modern surface-mount availability. The device integrates two separate counting units within a single integrated circuit package for space-constrained applications.

Counter Dividers Replacement Considerations

SN74LS390N serves as the direct through-hole equivalent. SN74LS393 offers similar dual-counter functionality but lacks decade decoding capabilities. Verify pin compatibility before substituting with generic 74LS390 equivalents from other manufacturers.