SN74LS90NSR

Counter Dividers Overview

The SN74LS90NSR is a single-decade counter integrated circuit manufactured by Texas Instruments. It operates within the LS logic series and features a synchronous binary/decade counting architecture with asynchronous reset capabilities. The device supports a supply voltage range of 4.75 V to 5.25 V and functions at clock frequencies up to 42 MHz. It is housed in a 14-SOIC surface-mount package and is rated for operation between 0°C and +70°C.

Counter Dividers Feature Summary

• Integrates a divide-by-two stage and a BCD decade counter into a single unit
• Supports asynchronous reset and preset functions for flexible control
• Features negative-edge triggered flip-flops for precise timing synchronization

Counter Dividers Applications

• Digital frequency division circuits
• Binary-coded decimal (BCD) counting systems
• Time-base generators for digital clocks

Counter Dividers Procurement Notes

Verify the specific suffix 'NSR' against the manufacturer's current datasheet to confirm the tape-and-reel packaging format and pinout compatibility. Ensure the component meets RoHS3 compliance requirements if applicable to your assembly process. Cross-reference the active status with official distributor channels to avoid obsolete stock.

Counter Dividers Selection Notes

Select this component when a compact surface-mount solution is required for decade counting applications. It serves as a direct replacement for through-hole variants like the SN74LS90N, provided the PCB layout accommodates the SOIC-14 footprint. Consider the 42 MHz maximum operating speed when designing high-frequency signal paths.

Counter Dividers Part Context

This part belongs to the widely adopted 74LS family of logic devices, known for low-power Schottky performance. The SN74LS90 variant specifically combines binary and decimal counting stages, offering versatility in digital design without requiring multiple discrete chips.

Counter Dividers Replacement Considerations

SN74LS90DR is a verified equivalent from Texas Instruments featuring identical logical functionality and specifications in a similar SOIC package.