Texas Instruments

SN74HC688NG4  

Linear Comparators

SN74HC688NG4 Description

The SN74HC688NG4 is a high-speed CMOS 8-bit identity comparator designed for a wide range of digital applications. Manufactured by Texas Instruments, this device is part of the 74HC series, known for its robust performance and reliability. The SN74HC688NG4 is housed in a through-hole package, specifically a 20-pin DIP (Dual In-line Package), making it suitable for both prototyping and production environments.

SN74HC688NG4 Features

High-Speed Performance:
The SN74HC688NG4 offers a maximum propagation delay of 36 nanoseconds at a supply voltage of 6V and a load capacitance of 50 picofarads. This high-speed performance ensures efficient data processing and comparison, making it ideal for applications requiring rapid response times.

Low Power Consumption:
With a quiescent current of only 8 microamperes, the SN74HC688NG4 is designed to minimize power consumption. This feature is particularly beneficial for battery-powered or energy-sensitive applications, where power efficiency is crucial.

Flexible Supply Voltage:
The comparator operates within a supply voltage range of 2V to 6V, providing flexibility in system design. This wide voltage range allows the device to be used in various electronic systems without the need for additional voltage regulation.

Active Low Output:
The output of the SN74HC688NG4 is active low, which means it asserts a low signal when the input conditions are met (A=B). This output configuration is advantageous for interfacing with other digital circuits that require active low signals.

High Output Current Capability:
The device can source and sink up to 5.2 milliamperes of current, ensuring robust output drive capability. This feature is essential for driving loads or interfacing with other digital components without the need for additional buffering.

Compliance and Standards:
The SN74HC688NG4 is REACH unaffected and RoHS3 compliant, ensuring it meets environmental and safety standards. This compliance is critical for manufacturers looking to adhere to regulatory requirements and promote sustainable practices.

SN74HC688NG4 Applications

Digital Systems:
The SN74HC688NG4 is ideal for use in digital systems where data integrity and rapid comparison are essential. Applications include microprocessor systems, memory management units, and digital signal processing circuits.

Memory Address Comparison:
In memory systems, the comparator can be used to compare memory addresses, ensuring accurate data retrieval and storage. This application is particularly useful in systems with large memory arrays or complex memory architectures.

Data Integrity Verification:
The device can be employed in systems where data integrity verification is required. By comparing input data with expected values, the SN74HC688NG4 can detect errors or discrepancies, enhancing system reliability.

Control Systems:
In control systems, the comparator can be used to monitor and compare sensor inputs with predefined thresholds. This application is beneficial in automation and industrial control systems where precise control and monitoring are necessary.

Conclusion of SN74HC688NG4

The SN74HC688NG4 is a versatile and high-performance 8-bit identity comparator that offers significant advantages over similar models. Its high-speed operation, low power consumption, and flexible supply voltage make it suitable for a wide range of digital applications. The device's active low output and high output current capability ensure robust interfacing with other digital circuits. Compliance with environmental and safety standards further enhances its appeal for modern electronic designs. Whether used in microprocessor systems, memory management, or control systems, the SN74HC688NG4 provides reliable performance and efficient operation, making it an excellent choice for engineers and designers in the electronics industry.

SN74HC688NG4 Documents

Download datasheets and manufacturer documentation for SN74HC688NG4

PCN Assembly/Origin :

Multiple Changes 29/Dec/2021      

Datasheets :

SN54HC688, SN74HC688      

PCN Design/Specification :

Copper Bond Wire Revision A 04/Dec/2013