SN74LS90DR

Counter Dividers Overview

The SN74LS90DR is a single-decade counter integrated circuit manufactured by Texas Instruments, belonging to the 74LS logic series. It features a 14-pin SOIC surface-mount package and operates within a supply voltage range of 4.75 V to 5.25 V. The device supports an asynchronous reset mechanism and utilizes negative-edge triggering for clock inputs. It functions as a four-bit binary counter capable of decimal counting with a maximum count rate of 42 MHz. The component is rated for operation in ambient temperatures ranging from 0°C to +70°C.

Counter Dividers Feature Summary

• Implements a decade counting sequence utilizing four internal flip-flops
• Provides asynchronous reset functionality for immediate state initialization
• Supports surface-mount installation via a standard 14-SOIC footprint

Counter Dividers Applications

• Digital frequency division circuits
• Decimal-based timing and sequencing systems
• Binary-coded decimal (BCD) generation modules

Counter Dividers Procurement Notes

Verify the specific suffix 'DR' confirms the tape-and-reel packaging format required for automated assembly processes. Confirm that the 74LS logic family designation aligns with existing system power and interface requirements. Ensure the SOIC-14 physical dimensions match the designated PCB land pattern. Validate RoHS compliance status against current environmental regulations for the target deployment region.

Counter Dividers Selection Notes

Select this component when a dedicated decimal counting function is required in a compact surface-mount design. The 74LS series offers a balance of speed and power consumption suitable for general-purpose digital logic applications. Consider the 42 MHz maximum operating frequency to ensure compatibility with the system clock speeds. Verify that the asynchronous reset feature meets the control logic requirements for the intended application.

Counter Dividers Part Context

This part belongs to the Texas Instruments 74LS90 family of integrated circuits. The 'SN' prefix indicates commercial temperature grade availability. The 'LS' suffix identifies the Low-power Schottky logic technology, which provides improved switching characteristics compared to standard TTL. The 'DR' suffix specifically denotes the reel-packaged variant of the SOIC-14 housing.

Counter Dividers Replacement Considerations

The SN74LS90DE4 is listed as a verified substitute part number offering equivalent electrical and functional specifications.