Product Overview: SN74S85NSRE4 from Texas Instruments

The SN74S85NSRE4 is a high-performance 4-bit magnitude comparator designed and manufactured by Texas Instruments, a leader in the semiconductor industry. This integrated circuit is engineered to compare two 4-bit binary, BCD, or other monotonic codes and provide outputs that indicate the magnitude relationship between them. It is a crucial component in a wide range of digital systems where comparison tasks are necessary, such as in digital computers, control systems, and data processing devices.

Constructed with bipolar technology, the SN74S85NSRE4 offers fast switching speeds and a high degree of precision. It operates over a wide voltage range, typically from 4.75V to 5.25V, which makes it suitable for interfacing with TTL logic levels. The device comes in a 16-pin plastic small-outline package, which is designated by the NSR suffix in its part number, ensuring a compact footprint on printed circuit boards.

Key features of the SN74S85NSRE4 include:

• Four fully independent comparator logic circuits on a single chip.
• Direct cascading capabilities for comparison of words greater than 4 bits without additional gating.
• Open-collector outputs that allow wired-OR connections for increased flexibility.
• Typical power dissipation of 45 mW, ensuring energy-efficient operation.
• Operation over the full industrial temperature range, making it reliable in various environmental conditions.

The device's functionality is straightforward: two 4-bit words (A and B) are applied to the comparator inputs, and the SN74S85NSRE4 provides three outputs: A > B, A = B, and A

Overall, the SN74S85NSRE4 is an essential component for designers who require a reliable and efficient means to perform digital comparisons. Its robust design, combined with Texas Instruments' reputation for high-quality products, makes it a preferred choice for applications demanding accurate and rapid comparison capabilities.