The SN74LS90NSR is a versatile counter IC produced by Texas Instruments, designed to deliver precision and reliability for a wide array of electronics applications. This integrated circuit belongs to the 74LS series, which is renowned for its low-power Schottky technology, ensuring efficient operation with minimal power consumption.

Key Features:

• 4-Bit Binary Counter: The SN74LS90NSR is primarily a 4-bit binary counter, capable of counting from 0 to 15 (0x0 to 0xF in hexadecimal) before resetting to zero.
• Decade Counter: Additionally, this IC can be configured as a decade counter for applications that require counting in base 10.
• Divide-by-Two and Divide-by-Five Configurations: It also offers divide-by-two and divide-by-five counting options, making it highly versatile for different counting operations.
• Direct Clear Input: A direct clear input allows for immediate resetting of the count, which is essential for precise timing and control tasks.
• Multiple Count Enable Inputs: It features two count enable inputs to provide control over counting operations, which can be used to implement various counting sequences and gating functions.
• Standard Logic Levels: The device operates with standard TTL logic levels, ensuring compatibility with a wide range of digital components and systems.

Applications:

The SN74LS90NSR is suitable for various applications including:

• Frequency division
• Time delay generation
• Counter design for digital clocks and timers
• Sequential logic operations
• Interface circuitry for digital systems

Package and Quality:

Provided in a compact SOP (Small Outline Package), the SN74LS90NSR is designed for space-saving on printed circuit boards (PCBs) while ensuring robustness and durability. Texas Instruments is committed to high-quality manufacturing standards, and this product complies with RoHS (Restriction of Hazardous Substances) directives, making it an environmentally friendly choice for electronic designs.