SN74LS90N, Decade Counter, DIP-14

The SN74LS90N is a high-speed BCD decade counter, designed for use in frequency division, event counting, and digital sequencing applications. It consists of four master/slave flip-flops, internally connected to form a divide-by-two and a divide-by-five section. This enables its use in BCD, bi-quinary, and divide-by-ten counting configurations. Operating at 4.75V to 5.25V, the SN74LS90N achieves a maximum count rate of 32 MHz, making it suitable for high-speed logic applications. It includes asynchronous master reset (MR1, MR2) and master set (MS1, MS2) functions, allowing precise initialization and count control. Encased in a DIP-14 package, the SN74LS90N is ideal for digital frequency counters, decade counting applications, digital clocks, and other logic-based systems requiring precise event counting.

• BCD Decade Counter – Supports divide-by-2 and divide-by-5 operations, commonly used in digital clocks and frequency counters.
• High-Speed Operation – Supports a maximum clock frequency of 32 MHz, ensuring efficient high-speed counting​SN54-74LS90.
• Multiple Counting Modes – Can be configured as BCD (Binary-Coded Decimal), bi-quinary, and divide-by-ten counters.
• Low-Power Schottky Technology – Provides fast switching speeds while maintaining low power dissipation.
• Asynchronous Master Reset & Set Functions – Ensures precise control over initialization and counting cycles.
• DIP-14 Package for Easy Integration – Through-hole mounting for breadboarding, prototyping, and PCB applications.