Texas Instruments
La imagen puede ser una representación.
Consulte las especificaciones para obtener detalles del producto.
CD74HC390E
Ver Detalle Hojas de datos

CD74HC390E

Product Overview

Category

CD74HC390E belongs to the category of integrated circuits (ICs).

Use

It is commonly used in digital electronic circuits for various applications.

Characteristics

  • High-speed operation
  • Wide operating voltage range
  • Low power consumption
  • Compatibility with TTL inputs
  • Schmitt trigger action on all inputs

Package

CD74HC390E is available in a 16-pin dual in-line package (DIP).

Essence

The essence of CD74HC390E lies in its ability to perform high-speed digital operations while consuming low power.

Packaging/Quantity

CD74HC390E is typically packaged in reels or tubes, with quantities varying depending on the supplier.

Specifications

  • Supply Voltage Range: 2V to 6V
  • High-Level Input Voltage: 2V to VCC
  • Low-Level Input Voltage: GND to 0.8V
  • High-Level Output Current: -5.2mA
  • Low-Level Output Current: 5.2mA
  • Operating Temperature Range: -55°C to +125°C

Detailed Pin Configuration

  1. Clock Input A
  2. Clock Input B
  3. Reset Input
  4. Carry Output
  5. Counter Output Q0
  6. Counter Output Q1
  7. Counter Output Q2
  8. Counter Output Q3
  9. Counter Output Q4
  10. Counter Output Q5
  11. Counter Output Q6
  12. Counter Output Q7
  13. Counter Output Q8
  14. Counter Output Q9
  15. Ground (GND)
  16. Positive Supply Voltage (VCC)

Functional Features

  • Dual 4-bit decade ripple counter
  • Asynchronous reset capability
  • Carry output for cascading multiple counters
  • Individual counter outputs for each stage

Advantages

  • High-speed operation allows for efficient digital signal processing.
  • Wide operating voltage range enables compatibility with various systems.
  • Low power consumption reduces energy requirements.
  • Schmitt trigger action on all inputs ensures noise immunity.

Disadvantages

  • Limited number of counter stages (up to 9) may restrict certain applications.
  • Lack of built-in protection features against electrical faults.

Working Principles

CD74HC390E operates as a dual 4-bit decade ripple counter. It counts input clock pulses and provides individual outputs for each stage. The carry output allows for cascading multiple counters, enabling the creation of larger counting circuits. The asynchronous reset input resets the counter to its initial state when activated.

Detailed Application Field Plans

CD74HC390E finds applications in various fields, including: 1. Digital frequency dividers 2. Time delay circuits 3. Event counters 4. Frequency synthesizers 5. Industrial automation systems

Detailed and Complete Alternative Models

Some alternative models to CD74HC390E include: 1. SN74HC390 - Texas Instruments 2. MC74HC390 - ON Semiconductor 3. HEF4030B - NXP Semiconductors 4. CD4017BE - Texas Instruments 5. 74HCT390 - Nexperia

These alternatives offer similar functionality and can be used as replacements based on specific requirements.

Word count: 410 words

Enumere 10 preguntas y respuestas comunes relacionadas con la aplicación de CD74HC390E en soluciones técnicas

Sure! Here are 10 common questions and answers related to the application of CD74HC390E in technical solutions:

  1. Q: What is CD74HC390E? A: CD74HC390E is a dual 4-bit decade counter/divider with reset and ripple carry outputs. It is commonly used in digital circuits for counting and dividing applications.

  2. Q: What is the operating voltage range of CD74HC390E? A: CD74HC390E operates within a voltage range of 2V to 6V.

  3. Q: Can CD74HC390E be used in high-speed applications? A: Yes, CD74HC390E is designed for high-speed operation and can be used in applications that require fast counting or dividing.

  4. Q: How many outputs does CD74HC390E have? A: CD74HC390E has two independent 4-bit ripple counters, each with separate clock inputs and outputs.

  5. Q: Does CD74HC390E have a reset function? A: Yes, CD74HC390E has a reset input (active LOW) that allows you to clear the counter to its initial state.

  6. Q: Can CD74HC390E be cascaded to create larger counters? A: Yes, multiple CD74HC390E chips can be cascaded together to create larger counters by connecting the ripple carry output of one chip to the clock input of the next.

  7. Q: What is the maximum clock frequency for CD74HC390E? A: The maximum clock frequency for CD74HC390E is typically around 50 MHz.

  8. Q: Is CD74HC390E compatible with TTL logic levels? A: Yes, CD74HC390E is compatible with both CMOS and TTL logic levels, making it versatile for various applications.

  9. Q: Can CD74HC390E be used in both synchronous and asynchronous modes? A: Yes, CD74HC390E can operate in both synchronous (using the clock input) and asynchronous (using the reset input) counting modes.

  10. Q: What are some common applications of CD74HC390E? A: CD74HC390E is commonly used in frequency division circuits, digital clocks, event counters, frequency synthesizers, and other applications that require counting or dividing functions.

Please note that these answers are general and may vary depending on specific circuit designs and requirements.