ACPL-C87AT-500E Detai LED explanation of pin function specifications and circuit principle instructions

The model you provided, "ACPL-C87AT-500E," is a component from Broadcom, specifically from their optocoupler product line. This model refers to an optocoupler IC (Integrated Circuit) that is used for electrical isolation, typically used in digital communication systems, high-speed data transfer, and in applications where electrical isolation between two parts of a system is necessary.

I will now describe the pin functions and the circuit principles, focusing on the detai LED explanation of each pin function for the specific packaging type. This will involve listing each pin in a systematic way, providing a description of the function and usage for each pin. Given the complexity of the request, I will provide a detailed breakdown in a table format as well as a FAQ section with 20 common questions and their answers.

ACPL-C87AT-500E Pin Function and Packaging:

Package Type: The ACPL-C87AT-500E is typically available in the DIP-8 or SO-8 package. It has 8 pins in total. Pin Function Table: Pin Number Pin Name Pin Function Description 1 Anode (A) The input pin connected to the positive terminal of the LED within the optocoupler. 2 Cathode (K) The input pin connected to the negative terminal of the LED within the optocoupler. 3 No Connection This pin is not connected internally to the device circuit and does not serve any function. 4 Collector (C) The output collector pin is connected to the photo transistor 's collector side. 5 Emitter (E) The output emitter pin is connected to the phototransistor's emitter side. 6 Vcc The power supply voltage input to the optocoupler (typically 5V). 7 Ground (GND) The ground reference pin. 8 Base (B) This pin connects to the base of the phototransistor, providing biasing for the output. Detailed Function and Explanation of Each Pin:

Pin 1 (Anode):

This is the positive terminal of the internal LED (Light Emitting Diode ). When the input signal is high, the LED emits light, which then activates the phototransistor in the output stage of the optocoupler.

Pin 2 (Cathode):

This is the negative terminal of the LED. The current flowing through this LED determines whether the LED will emit light or not.

Pin 3 (No Connection):

This pin is intentionally left unconnected in the device design. It should not be connected to any external circuit.

Pin 4 (Collector):

This pin is connected to the collector of the phototransistor. It is used to carry the output signal from the optocoupler.

Pin 5 (Emitter):

This pin is connected to the emitter of the phototransistor. It is the output side where the electrical signal is transmitted after being optically coupled.

Pin 6 (Vcc):

The Vcc pin is the power supply input for the internal circuits of the optocoupler. A typical value is 5V.

Pin 7 (Ground):

The GND pin serves as the reference ground for the entire device. It should be connected to the system ground.

Pin 8 (Base):

This pin is used to bias the phototransistor in the output stage, ensuring proper operation of the optocoupler.

20 Frequently Asked Questions (FAQ):

1. What is the typical voltage range for the ACPL-C87AT-500E?

The typical operating voltage range for the ACPL-C87AT-500E is between 4.5V to 5.5V.

2. What is the maximum current rating for the input LED (Pins 1 and 2)?

The maximum forward current for the LED is 50mA.

3. What is the minimum input current to activate the LED?

The minimum input current to activate the LED is 3mA.

4. Can the ACPL-C87AT-500E be used for high-speed data transmission?

Yes, this optocoupler supports high-speed data transmission, with a maximum data rate of 10 Mbps.

5. What is the isolation voltage rating of the ACPL-C87AT-500E?

The isolation voltage rating is typically 5000V.

6. What is the operating temperature range for the ACPL-C87AT-500E?

The operating temperature range is from -40°C to 85°C.

7. What type of package is the ACPL-C87AT-500E available in?

The ACPL-C87AT-500E is available in an 8-pin DIP or SO-8 package.

8. How does the optocoupler provide electrical isolation?

The ACPL-C87AT-500E provides electrical isolation by using an internal LED and phototransistor, allowing data or signals to pass optically but without direct electrical connection.

9. What is the role of Pin 4 (Collector)?

Pin 4 is the output collector of the phototransistor, where the output signal is generated and transmitted to the external circuit.

10. Can I use the ACPL-C87AT-500E in a logic level shifting application?

Yes, the ACPL-C87AT-500E can be used for logic level shifting, as it can isolate different voltage levels on either side.

11. What is the function of Pin 5 (Emitter)?

Pin 5 is the emitter of the phototransistor and serves as the output side of the optocoupler.

12. How does the ACPL-C87AT-500E ensure signal integrity?

The ACPL-C87AT-500E uses a phototransistor for output, which helps reduce the impact of electrical noise and ensures high signal integrity.

13. What is the typical rise time of the output signal?

The typical rise time is approximately 100ns, which allows for high-speed signal transmission.

14. What is the forward voltage of the LED?

The forward voltage of the LED is typically 1.2V.

15. Is there a built-in over-current protection in the ACPL-C87AT-500E?

Yes, the ACPL-C87AT-500E has built-in over-current protection for the LED to prevent damage.

16. What is the recommended external resistor value for the LED (Pins 1 and 2)?

The recommended value of the external series resistor is calculated based on the input current and supply voltage, but a typical value would be around 330Ω.

17. How can I connect the ACPL-C87AT-500E to a microcontroller?

The input side (Pins 1 and 2) can be connected to a microcontroller GPIO pin through a current-limiting resistor, and the output (Pins 4 and 5) can be connected to the microcontroller's input pins.

18. What is the power consumption of the ACPL-C87AT-500E?

The power consumption of the ACPL-C87AT-500E is low, typically around 20mA during operation.

19. How can I improve the speed of the ACPL-C87AT-500E?

To improve speed, ensure that the output load on Pin 5 is minimal and the input current to the LED is within specified limits.

20. Can the ACPL-C87AT-500E be used in industrial applications?

Yes, the ACPL-C87AT-500E is suitable for industrial applications due to its robust isolation, high-speed performance, and wide temperature range.

I hope this helps clarify the details you're looking for regarding the ACPL-C87AT-500E optocoupler! If you need further details or have more questions, feel free to ask.