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PT74HC595PE
Product Overview
- Category: Integrated Circuit (IC)
- Use: Shift Register
- Characteristics: High-Speed, Serial-In Parallel-Out (SIPO), 8-Bit, 3-State Output
- Package: DIP-16 (Dual In-Line Package with 16 pins)
- Essence: The PT74HC595PE is a shift register IC that allows serial data input and parallel data output. It is commonly used in digital electronics for expanding the number of output pins of microcontrollers or other devices.
- Packaging/Quantity: The PT74HC595PE is typically sold in tubes or reels containing multiple units.
Specifications
- Supply Voltage: 2V to 6V
- Input Voltage: 0V to Vcc
- Output Voltage: 0V to Vcc
- Operating Temperature: -40°C to +85°C
- Maximum Clock Frequency: 25 MHz
- Number of Outputs: 8
- Output Current: 6 mA
- Propagation Delay: 13 ns
Pin Configuration
The PT74HC595PE has 16 pins arranged as follows:
+---+--+---+
Q1 |1 +--+ 16| Vcc
Q2 |2 15| Q0
Q3 |3 14| DS (Serial Data Input)
Q4 |4 13| OE (Output Enable)
Q5 |5 12| ST_CP (Latch Clock)
Q6 |6 11| SH_CP (Shift Clock)
Q7 |7 10| MR (Master Reset)
GND |8 9| Q7'
+---------+
Functional Features
- Serial-in Parallel-out (SIPO) operation
- 3-state outputs for easy expansion and cascading
- Output enable and master reset control pins
- High-speed operation with a maximum clock frequency of 25 MHz
- Wide operating voltage range (2V to 6V)
- Low power consumption
Advantages and Disadvantages
Advantages: - Allows expansion of output pins without using additional microcontroller pins - Easy to interface with microcontrollers or other devices - High-speed operation enables efficient data transfer - 3-state outputs provide flexibility in connecting multiple devices
Disadvantages: - Limited number of outputs (8 in this case) - Requires external components for proper operation (clock signals, serial data input)
Working Principles
The PT74HC595PE is a shift register IC that operates based on the principle of serial-in parallel-out (SIPO). It receives data serially through the DS pin and shifts it internally with each clock pulse applied to the SHCP pin. The shifted data is then latched into the output registers when the latch clock (STCP) signal is activated.
The 3-state outputs allow multiple PT74HC595PE ICs to be connected in series, enabling the expansion of output pins. The output enable (OE) pin controls whether the outputs are active or in a high-impedance state. The master reset (MR) pin resets the internal state of the shift register when activated.
Detailed Application Field Plans
The PT74HC595PE is widely used in various applications, including:
- LED Matrix Displays: By connecting multiple PT74HC595PE ICs together, it is possible to control a large number of LEDs using a minimal number of microcontroller pins.
- Seven-Segment Displays: The shift register can be used to drive seven-segment displays, allowing the display of numbers and characters.
- Motor Control: The outputs of the PT74HC595PE can be used to control the direction and speed of motors in robotics or automation projects.
- Data Multiplexing: The shift register can be used for multiplexing data from multiple sources onto a single output line.
Detailed and Complete Alternative Models
- 74HC595
- SN74HC595
- CD74HC595
- MC74HC595
- M74HC595
These alternative models are functionally similar to the PT74HC595PE and can be used as replacements depending on availability and specific requirements.
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Liste 10 perguntas e respostas comuns relacionadas à aplicação de PT74HC595PE em soluções técnicas
Sure! Here are 10 common questions and answers related to the application of PT74HC595PE in technical solutions:
Q: What is PT74HC595PE? A: PT74HC595PE is a popular shift register integrated circuit (IC) that can be used to expand the number of digital outputs in microcontroller-based systems.
Q: How many outputs does PT74HC595PE have? A: PT74HC595PE has 8 output pins, which can be individually controlled using serial data input and clock signals.
Q: Can PT74HC595PE be used to control LEDs? A: Yes, PT74HC595PE is commonly used to control multiple LEDs by connecting them to its output pins and providing appropriate control signals.
Q: How do I connect PT74HC595PE to a microcontroller? A: PT74HC595PE can be connected to a microcontroller using three main connections: serial data input (DS), clock input (SHCP), and latch enable input (STCP).
Q: Can PT74HC595PE be cascaded to control more than 8 outputs? A: Yes, multiple PT74HC595PE ICs can be cascaded together to control a larger number of outputs by connecting the serial output (QH') of one IC to the serial input (DS) of the next IC.
Q: What is the maximum clock frequency for PT74HC595PE? A: The maximum clock frequency for PT74HC595PE is typically around 25 MHz, but it may vary depending on the specific operating conditions.
Q: Can PT74HC595PE be used with both 3.3V and 5V microcontrollers? A: Yes, PT74HC595PE is compatible with both 3.3V and 5V microcontrollers, as it has a wide operating voltage range (2V to 6V).
Q: How do I set the output state of PT74HC595PE? A: The output state of PT74HC595PE can be set by shifting in the desired data bits serially using the serial data input (DS) pin and clocking them into the shift register.
Q: Can PT74HC595PE be used for driving other types of devices besides LEDs? A: Yes, PT74HC595PE can be used to drive various types of devices such as relays, motors, and displays, by connecting appropriate driver circuits to its output pins.
Q: Are there any limitations or considerations when using PT74HC595PE? A: Some considerations include the maximum current per output pin (typically around 35mA), power dissipation limits, and ensuring proper decoupling capacitors are used for stable operation.
Please note that these answers are general and may vary depending on the specific application and requirements.