The part number ISO7221CDR refers to an isolator from Texas Instruments (TI). It is a digital isolator that provides galvanic isolation between systems while maintaining fast data transmission and ensuring low power consumption.
Package Type and Pinout
The ISO7221CDR comes in a SOIC-16 package. This package type has 16 pins, each with a specific function to facilitate isolation between two sides of a circuit. Below is the detailed pinout and the description of each pin.
Pin Function Table (for SOIC-16 package):
Pin No. Pin Name Function Description 1 VCC1 Positive supply voltage for side 1 of the isolator. 2 GND1 Ground reference for side 1 of the isolator. 3 D1+ Positive data input for the isolator (side 1). 4 D1- Negative data input for the isolator (side 1). 5 VCC2 Positive supply voltage for side 2 of the isolator. 6 GND2 Ground reference for side 2 of the isolator. 7 D2+ Positive data output for the isolator (side 2). 8 D2- Negative data output for the isolator (side 2). 9 NC No connection (reserved for internal use). 10 NC No connection (reserved for internal use). 11 NC No connection (reserved for internal use). 12 NC No connection (reserved for internal use). 13 NC No connection (reserved for internal use). 14 NC No connection (reserved for internal use). 15 NC No connection (reserved for internal use). 16 NC No connection (reserved for internal use).This table summarizes all 16 pins, where the first 8 are the primary data pins and the rest are either unused or reserved for internal functionality.
Pin Functionality Breakdown:
VCC1 (Pin 1): This is the power supply pin for the isolator’s side 1. It must be connected to a positive supply voltage, typically 3.3V or 5V. GND1 (Pin 2): This is the ground pin for side 1 of the isolator. It should be connected to the ground reference of the system. D1+ (Pin 3) and D1- (Pin 4): These are the differential data input pins for side 1. Data signals are received here, where D1+ is the positive input, and D1- is the negative input. VCC2 (Pin 5): This pin provides power to the second side of the isolator. It should be connected to a supply voltage (often the same as VCC1). GND2 (Pin 6): This pin serves as the ground reference for side 2 of the isolator. D2+ (Pin 7) and D2- (Pin 8): These are the differential data output pins for side 2. Data received from side 1 is transmitted here, where D2+ is the positive output, and D2- is the negative output.FAQs (20 Questions and Answers) on ISO7221CDR:
Q: What is the model number of the isolator? A: The model number of the isolator is ISO7221CDR.
Q: What is the package type of the ISO7221CDR? A: The package type is SOIC-16, meaning it has 16 pins in a small-outline integrated circuit form.
Q: How many pins are available in the ISO7221CDR package? A: The ISO7221CDR has 16 pins.
Q: What is the supply voltage for the ISO7221CDR? A: The supply voltage for the ISO7221CDR is typically 3.3V or 5V, depending on the application.
**Q: How does the *ISO7221CDR* isolate signals between two sides?** A: It uses galvanic isolation, which separates the two sides electrically while allowing data to pass through optically or capacitively.
Q: What is the purpose of the D1+ and D1- pins? A: D1+ and D1- are the data input pins for side 1 of the isolator, where D1+ is the positive input, and D1- is the negative input.
Q: What is the purpose of the D2+ and D2- pins? A: D2+ and D2- are the data output pins for side 2 of the isolator, where D2+ is the positive output, and D2- is the negative output.
Q: What should I connect the NC pins to? A: The NC pins are not connected to any circuit; they are reserved for internal use only.
**Q: What is the operating temperature range for the **ISO7221CDR? A: The typical operating temperature range for the ISO7221CDR is -40°C to 125°C.
**Q: Can the *ISO7221CDR* be used for high-speed data transmission?** A: Yes, it supports high-speed data transmission with a maximum data rate of up to 100 Mbps.
**Q: Is the *ISO7221CDR* suitable for industrial applications?** A: Yes, the ISO7221CDR is designed to meet the needs of industrial applications with high noise immunity and robust isolation performance.
**Q: How do I choose the power supply for the **ISO7221CDR? A: Ensure the supply voltage for both sides is within the specified range, usually 3.3V or 5V.
**Q: Does the *ISO7221CDR* require external components for proper operation?** A: The ISO7221CDR typically does not require additional components for basic operation, but you may need bypass capacitor s for stable power supply.
**Q: What is the isolation voltage of the **ISO7221CDR? A: The ISO7221CDR provides up to 2500 Vrms of isolation between sides.
**Q: Is the *ISO7221CDR* compatible with both TTL and CMOS logic levels?** A: Yes, it can interface with both TTL and CMOS logic signals.
**Q: How do I handle the unused pins on the **ISO7221CDR? A: The unused pins (NC) should be left unconnected or can be tied to ground if required by the design.
**Q: What is the power consumption of the **ISO7221CDR? A: The power consumption of the ISO7221CDR is typically low, with a supply current of around 1.3 mA per side in active mode.
**Q: Can the *ISO7221CDR* be used in automotive applications?** A: Yes, it is suitable for automotive environments as it supports the extended temperature range.
**Q: Can the *ISO7221CDR* isolate data signals with mixed voltage levels?** A: Yes, it can isolate signals between systems operating at different voltage levels (e.g., 3.3V and 5V systems).
**Q: Does the *ISO7221CDR* provide any fault detection or status indication?** A: The ISO7221CDR does not feature dedicated fault detection, but its design provides high reliability in operation.
This completes a thorough explanation of the ISO7221CDR isolator, its pin functions, and common questions and answers related to its usage.
