Product Overview: SN74LS393D Dual 4-Bit Binary Counter

The SN74LS393D from Texas Instruments is a high-performance, dual 4-bit binary counter integrated circuit. This device is part of the 74LS logic family, known for its low power consumption and high-speed operation. The SN74LS393D consists of two individual counters in a single package, allowing for flexibility and efficiency in a wide range of counting applications.

Each counter in the SN74LS393D features a fully independent clock circuit, enabling asynchronous operation. The counters can be cascaded easily by connecting the ripple-carry output (RCO) of one counter to the clock input (CLK) of the next. This allows for the creation of multi-stage counters capable of handling extended binary counting sequences.

The SN74LS393D operates over a voltage range of 4.75V to 5.25V, which is typical for 74LS series devices, ensuring compatibility with standard TTL (Transistor-Transistor Logic) power levels. This makes it suitable for interfacing with other TTL logic devices without the need for additional level-shifting components.

The device is packaged in a standard SOIC-14 (Small Outline Integrated Circuit) package, which is suitable for surface-mount technology (SMT) and offers a compact footprint for space-constrained applications. The SN74LS393D is characterized for operation from 0°C to 70°C, making it reliable for commercial-grade temperature environments.

Key features of the SN74LS393D include:

• Dual 4-bit binary counters for versatile counting applications.
• Independent clocks for asynchronous operation.
• Direct clear function to reset counters.
• Easy cascading capability for extended counting sequences.
• Low power consumption typical of the 74LS series logic family.
• Standard TTL-compatible voltage levels for easy interfacing.
• Compact SOIC-14 package for efficient board space utilization.
• Commercial-grade operating temperature range.

The SN74LS393D is an ideal choice for designers looking for a reliable, high-speed binary counter for applications such as digital clocks, frequency dividers, timers, and event counters in industrial controls, consumer electronics, and embedded systems.