Texas Instruments

SN74LS688NS  

Linear Comparators

SN74LS688NS Description

The SN74LS688NS is an 8-bit identity comparator integrated circuit (IC) from Texas Instruments, designed for high-speed digital applications. This IC is part of the 74LS series, known for its reliable performance and compatibility with TTL (Transistor-Transistor Logic) systems. The SN74LS688NS is housed in a surface-mount package, making it suitable for modern, space-efficient PCB designs.

SN74LS688NS Features

• Operating Temperature Range: The SN74LS688NS operates within a temperature range of 0°C to 70°C, making it suitable for a variety of industrial and commercial applications where moderate temperature variations are expected.
• Propagation Delay: With a maximum propagation delay of 23ns at 5V and 45pF, the SN74LS688NS ensures rapid signal processing, crucial for high-speed digital systems.
• Low Quiescent Current: The IC has a quiescent current (Iq) of 65 mA, which helps in reducing power consumption, making it ideal for applications where energy efficiency is a priority.
• Supply Voltage Range: The SN74LS688NS operates within a supply voltage range of 4.85V to 5.25V, ensuring stable performance and compatibility with standard TTL logic levels.
• Output Configuration: The output is active low, which is a common configuration for digital circuits, facilitating straightforward integration with other TTL devices.
• Output Function: The primary function of the SN74LS688NS is to compare two 8-bit inputs and assert the output when they are identical (A=B), providing a clear and reliable signal for digital equality detection.
• Current Handling: The IC can handle an output current of 24mA when low and 400µA when high, ensuring robust performance in various load conditions.
• Moisture Sensitivity Level (MSL): With an MSL of 1 (Unlimited), the SN74LS688NS is suitable for use in environments with varying humidity levels without the need for special handling or storage precautions.
• RoHS Compliance: The SN74LS688NS is ROHS3 compliant, ensuring that it meets the latest environmental standards and regulations, making it suitable for global markets.

SN74LS688NS Applications

The SN74LS688NS is ideal for applications requiring fast and reliable digital comparison, such as:

• Memory Address Decoding: Used in computer systems to compare memory addresses and ensure accurate data retrieval.
• Data Integrity Checks: In data processing systems, the SN74LS688NS can be used to verify the integrity of data by comparing input and output values.
• Digital Signal Processing: In communication systems, it can be employed to compare incoming and outgoing signals for error detection and correction.
• Microcontroller Applications: Used in embedded systems to compare sensor inputs or control signals, ensuring precise control and monitoring.
• Automotive Electronics: For comparing signals in automotive control units, ensuring reliable operation in varying environmental conditions.

Conclusion of SN74LS688NS

The SN74LS688NS from Texas Instruments is a versatile and reliable 8-bit identity comparator, offering high-speed performance and low power consumption. Its compatibility with standard TTL levels, combined with its robust current handling and environmental compliance, makes it an excellent choice for a wide range of digital applications. Whether used in memory decoding, data integrity checks, or embedded systems, the SN74LS688NS provides a dependable solution for digital comparison needs.

SN74LS688NS Documents

Download datasheets and manufacturer documentation for SN74LS688NS

PCN Obsolescence/ EOL :

Mult Dev EOL 30/Aug/2023