Diodes Incorporated
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PT74HC595WE

PT74HC595WE

Product Overview

Category

PT74HC595WE belongs to the category of integrated circuits (ICs).

Use

This product is commonly used in digital electronics and microcontroller-based projects for shifting data from one register to another.

Characteristics

  • High-speed operation
  • Wide operating voltage range
  • Low power consumption
  • Serial input and parallel output functionality
  • Cascadable feature for expanding the number of outputs
  • Compatible with various microcontrollers and logic families

Package

PT74HC595WE is available in a 16-pin wide SO package.

Essence

The essence of PT74HC595WE lies in its ability to efficiently control multiple outputs using minimal pins on a microcontroller.

Packaging/Quantity

PT74HC595WE is typically sold in reels containing a quantity of 250 units.

Specifications

  • Supply Voltage: 2V to 6V
  • Input Voltage: 0V to VCC
  • Output Voltage: 0V to VCC
  • Operating Temperature Range: -40°C to +85°C
  • Maximum Clock Frequency: 25 MHz
  • Maximum Output Current: 35 mA

Detailed Pin Configuration

  1. SER (Serial Data Input)
  2. SRCLK (Shift Register Clock Input)
  3. RCLK (Register Clock Input)
  4. OE (Output Enable Input)
  5. SRCLR (Shift Register Clear Input)
  6. QA (Parallel Output A)
  7. QB (Parallel Output B)
  8. QC (Parallel Output C)
  9. QD (Parallel Output D)
  10. QE (Parallel Output E)
  11. QF (Parallel Output F)
  12. QG (Parallel Output G)
  13. QH (Parallel Output H)
  14. VCC (Supply Voltage)
  15. GND (Ground)
  16. QH' (Serial Output)

Functional Features

PT74HC595WE is a shift register with an 8-bit storage register and 3-state outputs. It allows serial input of data, which is then shifted into the internal register on each rising edge of the shift register clock. The parallel output is available after the data has been completely shifted in.

The product also features an output enable pin (OE) that can be used to disable all outputs, making it suitable for multiplexing applications. Additionally, the shift register clear input (SRCLR) allows clearing the internal register when needed.

Advantages and Disadvantages

Advantages

  • Simplifies microcontroller interfacing by reducing the number of required pins
  • Allows cascading multiple devices for expanding the number of outputs
  • High-speed operation enables efficient data transfer
  • Wide operating voltage range provides flexibility in various applications

Disadvantages

  • Limited number of outputs (8 bits)
  • Requires additional components for proper usage (e.g., resistors, capacitors)

Working Principles

PT74HC595WE operates based on the principle of serial-in, parallel-out shifting. The serial data is entered through the SER pin and shifted into the internal register on each rising edge of the SRCLK input. The parallel output is then available on the QA-QH pins.

The shift register clear input (SRCLR) can be used to reset the internal register, while the output enable input (OE) allows enabling or disabling the outputs.

Detailed Application Field Plans

PT74HC595WE finds extensive application in various fields, including but not limited to: - LED matrix displays - Seven-segment displays - Multiplexing applications - Data storage and retrieval systems - Digital clocks and timers - Industrial automation - Robotics

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to PT74HC595WE are: - SN74HC595N - CD74HC595E - 74HCT595

These models are widely available and can be used as substitutes depending on specific requirements.

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Enumere 10 preguntas y respuestas comunes relacionadas con la aplicación de PT74HC595WE en soluciones técnicas

Sure! Here are 10 common questions and answers related to the application of PT74HC595WE:

  1. Q: What is PT74HC595WE?
    A: PT74HC595WE is a popular shift register integrated circuit (IC) commonly used in technical solutions.

  2. Q: What is the purpose of using PT74HC595WE in a circuit?
    A: PT74HC595WE allows for expanding the number of output pins of a microcontroller or other digital devices, making it useful for driving multiple LEDs, relays, or other digital components.

  3. Q: How many output pins does PT74HC595WE have?
    A: PT74HC595WE has 8 output pins, labeled Q0 to Q7.

  4. Q: Can PT74HC595WE be used with both 5V and 3.3V systems?
    A: Yes, PT74HC595WE is compatible with both 5V and 3.3V systems, making it versatile for various applications.

  5. Q: How do I connect PT74HC595WE to a microcontroller?
    A: PT74HC595WE requires three control pins - serial data input (DS), clock input (SHCP), and latch enable (STCP). These pins need to be connected to the corresponding pins on the microcontroller.

  6. Q: Can I daisy-chain multiple PT74HC595WE ICs together?
    A: Yes, PT74HC595WE supports daisy-chaining, allowing you to connect multiple ICs together to expand the number of output pins even further.

  7. Q: How do I control the outputs of PT74HC595WE?
    A: The outputs of PT74HC595WE can be controlled by shifting in data serially through the DS pin and then latching the data into the output registers using the STCP pin.

  8. Q: What is the maximum current that PT74HC595WE can sink/source per output pin?
    A: PT74HC595WE can typically sink or source up to 25mA per output pin, but it is recommended to check the datasheet for specific values.

  9. Q: Can I use PT74HC595WE to drive high-power components like motors?
    A: No, PT74HC595WE is not designed to directly drive high-power components like motors. It is better suited for low-power digital components such as LEDs or relays.

  10. Q: Are there any limitations or considerations when using PT74HC595WE?
    A: One limitation is that PT74HC595WE is a unidirectional shift register, meaning it can only shift data in one direction. Additionally, it requires external components like resistors and capacitors for proper operation.