ACPL-247-500E Detailed explanation of pin function specifications and circuit principle instructions
The "ACPL-247-500E" you mentioned is a component from Broadcom. It is a high-speed optocoupler designed for industrial applications, and is part of the company's optoelectronic devices range.
Here is a detai LED explanation of the requested information:
Pin Function Specifications for ACPL-247-500E
The ACPL-247-500E is a 8-pin optocoupler. Below is a detailed explanation of the pin functions and specifications for each pin:
Pinout and Function Table Pin Number Pin Name Pin Function Description 1 Anode (LED) This is the anode of the LED inside the optocoupler. It connects to the positive side of the LED current-limiting resistor, providing forward voltage and current to activate the LED. 2 Cathode (LED) This is the cathode of the LED inside the optocoupler. It connects to the negative side of the LED current-limiting resistor and completes the LED circuit. 3 Collector (Photo transistor ) This is the collector of the phototransistor inside the optocoupler. It is connected to the external circuit and typically pulls to ground through a resistor when the LED is on. 4 Emitter (Phototransistor) This is the emitter of the phototransistor inside the optocoupler. It is connected to the external circuit and is responsible for current output when the LED is on. 5 N/C No connection. This pin is not internally connected and can be left floating in the circuit. 6 Base (Phototransistor) The base of the internal phototransistor. It is typically connected to an external resistor to control the operation of the phototransistor. 7 Vcc ( Power Supply) This is the positive power supply pin for the phototransistor side of the optocoupler. Typically connected to a 5V or 3.3V supply. 8 GND Ground pin for the phototransistor side of the optocoupler. This pin should be connected to the ground of the circuit. ACPL-247-500E Pin Function Description Pin 1 (Anode of LED): The anode of the LED receives the current from the driving circuit to activate the internal LED. Ensure a current-limiting resistor is in series to avoid excessive current flow. Pin 2 (Cathode of LED): The cathode of the LED is the return path for the current. It should be properly connected to the ground or reference voltage. Pin 3 (Collector of Phototransistor): This pin is connected to the external circuit. When the LED is energized, the phototransistor conducts, creating a current path from the collector to the emitter. Pin 4 (Emitter of Phototransistor): The emitter is connected to the output side of the external circuit. It is the return path for the current when the phototransistor is activated. Pin 5 (N/C): No connection. This pin does not serve any purpose and should not be connected to anything in the circuit. Pin 6 (Base of Phototransistor): The base of the internal phototransistor controls its switching behavior. It is often connected to a resistor to regulate the gain and behavior of the phototransistor. Pin 7 (Vcc): This pin is the positive voltage supply for the phototransistor side. Typically, it is connected to a 5V or 3.3V power supply depending on the application. Pin 8 (Ground): The ground pin completes the power circuit. It must be connected to the circuit ground to enable proper operation of the phototransistor.封装与脚位
The ACPL-247-500E comes in an 8-pin DIP (Dual In-line Package). This is a common package for optocouplers and provides through-hole connections for easy integration into a variety of electronic circuits.
Pin Function Frequently Asked Questions (FAQs)
Q: What is the function of pin 1 on the ACPL-247-500E? A: Pin 1 is the anode of the internal LED, providing current to activate the LED.
Q: Can pin 5 be used in the circuit for the ACPL-247-500E? A: No, pin 5 is a "no connection" pin and should not be used in the circuit.
Q: What is the recommended supply voltage for Vcc (pin 7) on the ACPL-247-500E? A: The Vcc pin should typically be connected to a 5V or 3.3V power supply, depending on the requirements of the circuit.
Q: What is the purpose of pin 6 (base) on the ACPL-247-500E? A: Pin 6 is the base of the internal phototransistor and is used to control its behavior, often through an external resistor.
Q: How should pin 4 (emitter) of the ACPL-247-500E be connected in the circuit? A: Pin 4 is connected to the output side of the external circuit and serves as the return path for current when the phototransistor is activated.
Q: Can the ACPL-247-500E be used in a 3.3V circuit? A: Yes, the ACPL-247-500E can be used with 3.3V systems by properly adjusting the current-limiting resistors to match the lower voltage.
Q: What should I connect to pin 2 (cathode) of the ACPL-247-500E? A: Pin 2 (cathode) should be connected to the return path of the current, which is usually ground.
Q: Can pin 8 (GND) be connected to a voltage supply instead of ground? A: No, pin 8 should be connected to the ground of the circuit to complete the power circuit.
Q: How do I drive the LED in the ACPL-247-500E? A: The LED in the ACPL-247-500E is driven through pin 1 (anode) and pin 2 (cathode) with an appropriate current-limiting resistor.
Q: What is the maximum voltage rating for the ACPL-247-500E? A: The maximum operating voltage for the ACPL-247-500E is typically 5V or 3.3V for Vcc (pin 7).
Q: How do I use the phototransistor in the ACPL-247-500E? A: The phototransistor can be activated by energizing the internal LED. Pin 3 (collector) and pin 4 (emitter) form the output side of the phototransistor.
Q: What is the typical current needed to drive the LED of the ACPL-247-500E? A: The LED typically requires a forward current of 5mA to 10mA, depending on the application.
Q: What happens when the ACPL-247-500E LED is not energized? A: When the LED is not energized, the phototransistor remains off, and no current flows from the collector to the emitter.
Q: Can I use the ACPL-247-500E for high-speed data transmission? A: Yes, the ACPL-247-500E is designed for high-speed signal transmission, making it suitable for data communication applications.
Q: What is the maximum operating temperature for the ACPL-247-500E? A: The typical operating temperature range for the ACPL-247-500E is -40°C to +85°C.
Q: How do I protect the ACPL-247-500E from overcurrent? A: Use a current-limiting resistor in series with the LED (pins 1 and 2) to prevent overcurrent conditions.
Q: Can I use the ACPL-247-500E in automotive applications? A: The ACPL-247-500E can be used in automotive applications as long as the voltage and temperature specifications are met.
Q: How do I connect the ACPL-247-500E to a microcontroller? A: Connect the microcontroller output to pin 1 (anode) of the LED side, and use a current-limiting resistor to control the LED current.
Q: What is the output configuration of the ACPL-247-500E? A: The output of the ACPL-247-500E is an open-collector phototransistor configuration, meaning it requires an external pull-up resistor.
Q: Can I use the ACPL-247-500E for isolation in power circuits? A: Yes, the ACPL-247-500E is ideal for providing electrical isolation in low-to-medium power circuits.
This document covers the complete pin functions, specifications, and answers to common questions for the ACPL-247-500E optocoupler. If you need further details, feel free to ask!
