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BUY 74F521PC https://www.utsource.net/itm/p/1758978.html
8-Bit Identity Comparator; Package: DIP; No of Pins: 20; Container: Rail
Description: The 74F521PC is a 20-pin integrated circuit (IC) from the 74F521 family of ICs. It is a 4-bit magnitude comparator with open-collector outputs. Features: 4-bit magnitude comparator Open-collector outputs TTL compatible Low power consumption 20-pin DIP package Applications: Digital logic circuits Data processing systems Industrial control systems Automotive systems (For reference only)