SN74HC393PW Logic - Counters, Dividers by Texas Instruments

The SN74HC393PW is a dual 4-bit binary ripple counter integrated circuit (IC) manufactured by Texas Instruments. It belongs to the 74HC (High-speed CMOS) family, which is known for its high-speed operation and low power consumption. Here’s a detailed description of its features and specifications:

General Features:

• Dual Counter: The SN74HC393 contains two independent 4-bit binary counters, allowing for versatile counting applications.
• Ripple Counter Design: The counters operate in a ripple mode, meaning that the output of one counter stage serves as the clock input for the next stage, which can introduce a slight delay in the output transitions.
• Asynchronous Reset: Each counter can be reset asynchronously, allowing for immediate clearing of the count to zero regardless of the clock input.
• Count Enable: The counters can be enabled or disabled, providing control over when counting occurs.
• Wide Supply Voltage Range: The device operates over a supply voltage range of 2V to 6V, making it suitable for various applications.
• High-Speed Operation: The SN74HC393 can operate at high frequencies, with typical propagation delays of around 15 ns at 5V, making it suitable for fast digital circuits.

Pin Configuration:

The SN74HC393 is typically available in a 16-pin Dual In-Line Package (DIP) or a surface-mount package. The pin configuration includes:

• Clock Inputs (A and B): Each counter has its own clock input, which triggers counting on the rising edge.
• Reset Inputs (A and B): Asynchronous reset pins for each counter, allowing for immediate reset to zero.
• Count Enable Inputs (A and B): These pins control whether the counter is allowed to count or not.
• Output Pins (Q0 to Q3): Four output pins for each counter, representing the binary count value.
• Vcc and GND: Power supply and ground pins for the IC.

Electrical Characteristics:

• Input Voltage Levels: The input high voltage (VIH) and input low voltage (VIL) levels are compatible with standard CMOS logic levels.
• Output Drive Capability: The outputs can drive standard TTL loads, making the SN74HC393 suitable for interfacing with other digital logic families.
• Low Power Consumption: The device consumes minimal power, making it ideal for battery-operated applications.

Applications:

The SN74HC393 is widely used in various applications, including:

• Digital clocks and timers
• Frequency dividers
• Event counters
• State machines
• Any application requiring binary counting or frequency division

Summary:

The SN74HC393PW from Texas Instruments is a versatile and efficient dual 4-bit binary ripple counter that offers high-speed performance, low power consumption, and a range of features suitable for various digital counting applications. Its asynchronous reset and count enable functionalities provide flexibility in design, making it a popular choice among engineers and hobbyists alike.