7493 Binary Counter IC (74LS93) – 4-Bit Binary Ripple Counter for Logic & Memory Circuits

Overview 

The 7493 (74LS93) is a high-speed 4-bit ripple-carry binary counter. It consists of four master-slave flip-flops internally connected to provide a divide-by-two section and a divide-by-eight section. When these two sections are cascaded, the IC provides a full mod-16 binary count (0000 to 1111). This IC is indispensable for designers who need to generate binary sequences for memory addressing or to divide clock frequencies by 2, 4, 8, or 16.

Key Features

• Full 4-Bit Binary Count: Seamlessly counts from 0 to 15, providing a complete 4-bit nibble output.

• Flexible Clocking: Features two independent clock inputs (CP0 and CP1) for versatile frequency division.

• TTL Compatibility: Standard 5V operation, making it 100% compatible with Arduino, Raspberry Pi (via level shifters), and other 74-series logic.

• Gated Resets: Includes two reset inputs (MR_1 and MR_2) to clear the counter back to zero instantly.

• Classic DIP Package: 14-pin Dual In-line Package designed for easy insertion into breadboards or PCB sockets.

Technical Specifications 

Common Applications

• Binary Counters: Generating the 0000-1111 sequence for logic testing.

• Frequency Dividers: Dividing a clock signal by 16 for slower timing operations.

• Digital Systems: Serving as a basic memory address generator.

• DLD Lab Experiments: Teaching the mechanics of ripple counters and flip-flop cascading.