Overview
The SN74HC393N, produced by Texas Instruments, is a dual 4-bit binary counter integrated circuit. This device contains eight flip-flops and additional gating to implement two independent 4-bit counters in a single package. Each counter has its own clock (CLK) and clear (CLR) inputs, and the outputs from each counter stage are available, allowing for any submultiple of the input count frequency to be used for system timing signals. This component is part of the HC logic family, known for its wide operating voltage range and low power consumption, making it versatile for various digital circuit applications.
Key Specifications
| Parameter | Unit | Min | Nom | Max |
|---|---|---|---|---|
| VCC (Supply Voltage) | V | 2 | 5 | 6 |
| VIH (High-level Input Voltage) at VCC = 2 V | V | 1.5 | 1.5 | 1.5 |
| VIH (High-level Input Voltage) at VCC = 4.5 V | V | 3.15 | 3.15 | 3.15 |
| VIH (High-level Input Voltage) at VCC = 6 V | V | 4.2 | 4.2 | 4.2 |
| VIL (Low-level Input Voltage) at VCC = 2 V | V | 0.5 | 0.5 | 0.5 |
| VIL (Low-level Input Voltage) at VCC = 4.5 V | V | 1.35 | 1.35 | 1.35 |
| VIL (Low-level Input Voltage) at VCC = 6 V | V | 1.8 | 1.8 | 1.8 |
| ICC (Quiescent Current) at VCC = 6 V | μA | 8 | - | 80 |
| tpd (Propagation Delay) at VCC = 5 V | ns | 13 | - | - |
| fclock (Clock Frequency) at VCC = 5 V | MHz | 25 | - | - |
| TA (Operating Free-Air Temperature) | °C | -40 | - | 85 |
Key Features
- Wide operating voltage range of 2 V to 6 V.
- Outputs can drive up to 10 LSTTL loads.
- Low power consumption: 80 μA max ICC.
- Typical propagation delay (tpd) of 13 ns.
- ±4 mA output drive at 5 V.
- Low input current of 1 μA max.
- Dual 4-bit binary counters with individual clocks and clear inputs.
- Direct clear for each 4-bit counter.
- Can significantly improve system densities by reducing counter package count by 50%.
Applications
The SN74HC393N is suitable for a variety of digital circuit applications, including:
- Counting and timing circuits in digital systems.
- Frequency division and signal processing.
- Automotive and industrial control systems.
- Consumer electronics requiring low power consumption and high reliability.
- Embedded systems and microcontroller projects.
Q & A
- What is the operating voltage range of the SN74HC393N?
The operating voltage range is from 2 V to 6 V.
- How many LSTTL loads can the outputs of the SN74HC393N drive?
The outputs can drive up to 10 LSTTL loads.
- What is the maximum quiescent current (ICC) of the SN74HC393N?
The maximum ICC is 80 μA.
- What is the typical propagation delay (tpd) of the SN74HC393N?
The typical propagation delay is 13 ns.
- Does the SN74HC393N have individual clocks and clear inputs for each counter?
Yes, each 4-bit counter has its own clock and clear inputs.
- What is the maximum clock frequency of the SN74HC393N at 5 V?
The maximum clock frequency is 25 MHz at 5 V.
- What is the operating temperature range of the SN74HC393N?
The operating temperature range is from -40°C to 85°C.
- Can the SN74HC393N improve system densities?
Yes, it can significantly improve system densities by reducing the counter package count by 50%.
- What are some common applications of the SN74HC393N?
Common applications include counting and timing circuits, frequency division, automotive and industrial control systems, and consumer electronics.
- What types of packages are available for the SN74HC393N?
The SN74HC393N is available in various packages including PDIP, SOIC, SOP, SSOP, and TSSOP.
