Texas Instruments

SN74ALS679N

SN74ALS679N Description

The SN74ALS679N is a 12-bit address comparator integrated circuit (IC) from Texas Instruments, designed for high-speed and reliable address comparison in digital systems. This IC is part of the 74ALS series, known for its advanced low-power Schottky (ALS) technology, which offers high-speed performance with low power consumption. The SN74ALS679N is housed in a through-hole 20DIP package, making it suitable for applications requiring robust mechanical stability and ease of installation on printed circuit boards.

SN74ALS679N Features

• Operating Temperature Range: The SN74ALS679N operates within a temperature range of 0°C to 70°C, making it suitable for a wide range of industrial and commercial applications.
• Propagation Delay: With a maximum propagation delay of 30ns at 5V and a capacitive load of 50pF, this IC ensures fast and accurate address comparisons, crucial for high-speed digital systems.
• Supply Voltage: The IC operates within a supply voltage range of 4.5V to 5.5V, providing flexibility and compatibility with various power supply configurations.
• Output Configuration: The output of the SN74ALS679N is active high, which simplifies integration with other digital circuits and reduces the need for additional logic inversion.
• Output Current: The IC supports an output current of 2.6mA for high levels and 24mA for low levels, ensuring robust signal drive capabilities.
• Compliance and Standards: The SN74ALS679N is REACH unaffected and RoHS3 compliant, meeting environmental and regulatory standards for modern electronics manufacturing.
• Moisture Sensitivity Level: With an MSL rating of 1 (Unlimited), the IC is highly resistant to moisture, enhancing its reliability in various environmental conditions.

SN74ALS679N Applications

The SN74ALS679N is ideal for applications requiring precise and rapid address comparisons, such as in memory systems, microprocessors, and digital signal processing. Its high-speed performance and low power consumption make it suitable for both high-density and power-sensitive designs. Specific use cases include:

• Memory Address Decoding: Efficiently compares memory addresses to enable accurate data retrieval and storage.
• Microprocessor Systems: Facilitates fast address matching for instruction fetching and execution.
• Digital Signal Processing (DSP): Ensures rapid address comparisons for real-time signal processing applications.

Conclusion of SN74ALS679N

The SN74ALS679N from Texas Instruments is a versatile and high-performance 12-bit address comparator IC, offering a combination of speed, reliability, and low power consumption. Its advanced ALS technology and robust through-hole packaging make it an excellent choice for a variety of digital systems. Despite being marked as obsolete, the SN74ALS679N remains a reliable option for legacy systems and new designs requiring a proven address comparison solution.