74HC688N,652: 8-bit magnitude comparator, CMOS, 5V, 17ns propagation delay
Nexperia

The 74HC688N,652 by Nexperia is an integrated circuit designed to compare two 8-bit words, either in binary or BCD format. It operates as an 8-bit magnitude comparator, providing an output that indicates whether the two words are equal. The device is fabricated using high-speed Silicon-gate CMOS technology, offering compatibility with low power Schottky TTL (LSTTL) and adherence to JEDEC standard no. 7A.

This component features a standard output capability and falls under the MSI (Medium Scale Integration) ICC category. It requires a 5V supply voltage for operation and has a typical propagation delay of 17 nanoseconds from the Pn, Qn inputs to the P = Q output, with an input capacitance of 3.5 pF and a power dissipation capacitance of 30 pF per package.

Key Specifications and Features

  • Supply voltage (VCC): 5V
  • Propagation delay (Pn, Qn to P = Q): 17 ns typical
  • Enable (E) to P = Q propagation delay: 8 ns (HC), 12 ns (HCT)
  • Input capacitance (CI): 3.5 pF
  • Power dissipation capacitance (CPD): 30 pF
  • Operating temperature range: -40°C to +125°C

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Applications

  • Digital signal processing
  • Data comparison in microprocessors systems
  • Automated testing equipment

Category

Integrated Circuits

General information

8-bit magnitude comparators are integral components in digital electronics, primarily used for comparing two 8-bit words to determine their equality or magnitude relationship. These devices are crucial in applications requiring precise data comparisons, such as digital signal processing, automated testing equipment, and microprocessor systems. When selecting an 8-bit magnitude comparator, engineers should consider parameters such as supply voltage, propagation delay, input and power dissipation capacitance, and operating temperature range.

The 74HC688N,652 is a high-speed CMOS device, offering compatibility with low power Schottky TTL and adherence to JEDEC standards. Its ability to compare two 8-bit words, with an output indicating equality, makes it suitable for a wide range of applications. Engineers should note the component's standard output capability and classification under the MSI ICC category. The device's typical propagation delay and power consumption characteristics are also important considerations for system design.

In designing systems that incorporate 8-bit magnitude comparators, it's essential to ensure that the chosen component meets the specific requirements of the application, including speed, power consumption, and environmental conditions. The 74HC688N,652's specifications, including its supply voltage, propagation delay, and operating temperature range, make it a versatile choice for various digital comparison tasks.

Overall, the selection of an 8-bit magnitude comparator should be guided by the specific needs of the application, taking into account the device's technical specifications and compatibility with the existing system architecture. The 74HC688N,652 provides a reliable solution for applications requiring fast and accurate data comparison.

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