The model " SP3232EEY-L/TR " is a component manufactured by Sipex, now a part of Exar Corporation. This model is a RS-232 transceiver designed for converting the voltage levels between different communication systems using RS-232 standards.
Regarding your request for detailed specifications, pin functions, and other comprehensive details, here's a structured response.
Package and Pinout
The SP3232EEY-L/TR is typically available in a 28-pin TSSOP (Thin Shrink Small Outline Package). The package's 28 pins provide various functions, with each pin serving a specific purpose in the operation of the device.
Here is a detailed list of the 28 pins and their corresponding functions:
Pin Function 1 C1+ (Charge Pump) 2 C1- (Charge Pump) 3 V+ (Positive Voltage) 4 V- (Negative Voltage) 5 T1OUT (Transmitter Output 1) 6 R1IN (Receiver Input 1) 7 T2OUT (Transmitter Output 2) 8 R2IN (Receiver Input 2) 9 GND (Ground) 10 T3OUT (Transmitter Output 3) 11 R3IN (Receiver Input 3) 12 T4OUT (Transmitter Output 4) 13 R4IN (Receiver Input 4) 14 C2+ (Charge Pump) 15 C2- (Charge Pump) 16 VCC ( Power Supply) 17 T5OUT (Transmitter Output 5) 18 R5IN (Receiver Input 5) 19 T6OUT (Transmitter Output 6) 20 R6IN (Receiver Input 6) 21 T7OUT (Transmitter Output 7) 22 R7IN (Receiver Input 7) 23 T8OUT (Transmitter Output 8) 24 R8IN (Receiver Input 8) 25 T9OUT (Transmitter Output 9) 26 R9IN (Receiver Input 9) 27 T10OUT (Transmitter Output 10) 28 R10IN (Receiver Input 10)Circuit Principle Instructions
The SP3232EEY-L/TR is designed to be used in communication systems that require the conversion between RS-232 logic levels and the more common TTL logic levels, making it suitable for data communication between computers and peripherals.
Key Principles: Charge Pump: The charge pump circuit inside the IC generates the required positive and negative voltages (V+ and V-) for RS-232 communication. Signal Transmission: The IC allows for full-duplex communication, meaning it can simultaneously transmit and receive data. Voltage Level Conversion: It performs voltage conversion between the TTL logic level (0V or 3.3V) and the RS-232 voltage levels (±12V). Driver/Receiver Functions: It has separate transmitter and receiver functions for multiple channels, ensuring that data can be transmitted and received simultaneously on different lines.Pin Function FAQ
Q: What is the function of pin 1, C1+? A: Pin 1 is used as the positive terminal for the charge pump capacitor C1, which is part of the voltage generation circuit.
Q: What is the role of pin 5, T1OUT? A: Pin 5 is the first transmitter output, responsible for sending data from the chip to the receiving end.
Q: Can the voltage on pin 9, GND, fluctuate? A: No, pin 9 must be at a stable ground potential (0V) for proper operation of the IC.
Q: What does pin 16, VCC, supply? A: Pin 16 provides the positive power supply voltage to the IC, typically +5V or +3.3V.
Q: How is pin 17, T5OUT, different from pin 5, T1OUT? A: Pin 17 provides the output for the fifth data channel, whereas pin 5 corresponds to the first.
Q: What is the significance of pin 4, V-? A: Pin 4 supplies the negative voltage for the RS-232 signal levels, typically -12V.
Q: Can I use the same charge pump capacitors for pins 1 and 14? A: No, separate capacitors should be used for each charge pump circuit to ensure stable voltage generation.
Q: Is it necessary to connect all 28 pins for the IC to function? A: Yes, all pins should be connected appropriately to ensure full functionality and proper voltage levels.
Q: How do I ensure the SP3232EEY-L/TR communicates properly with a microcontroller? A: Ensure proper connection of the TX, RX, and GND pins, and use the appropriate voltage levels for communication.
Q: What happens if I connect pin 2, C1-, incorrectly? A: Incorrect connection of C1- can prevent the charge pump from generating the necessary voltage levels, resulting in malfunction.
Q: Can pin 7, T2OUT, be left unconnected? A: No, each output pin should be properly connected for the IC to transmit data on each channel.
Q: What voltage levels should be expected on the RS-232 output pins? A: RS-232 output levels typically range from ±12V on pins such as T1OUT, T2OUT, etc.
Q: Can I use this IC for communication with a 3.3V microcontroller? A: Yes, the SP3232EEY-L/TR supports 3.3V logic levels for communication with modern microcontrollers.
Q: What is the required capacitance for the charge pump capacitors? A: Typical values range from 0.1µF to 1µF, depending on the desired performance and voltage requirements.
Q: What is the maximum operating temperature of the SP3232EEY-L/TR? A: The operating temperature range is typically -40°C to +85°C.
Q: Is there a specific grounding requirement for the SP3232EEY-L/TR? A: Yes, pin 9 (GND) should be connected to the system ground to ensure proper operation.
Q: Can this IC be used for both half-duplex and full-duplex communication? A: Yes, the SP3232EEY-L/TR supports full-duplex communication, allowing simultaneous data transmission and reception.
Q: What is the input voltage range for the SP3232EEY-L/TR? A: The input voltage range is typically between 3.0V and 5.5V for the VCC pin.
Q: Is there any need for external resistors for proper operation? A: Generally, external resistors are not required, but it depends on the specific application and peripheral devices.
Q: Can this IC be used for long-distance communication? A: Yes, RS-232 communication is typically used for distances up to 15 meters (50 feet), depending on the baud rate.
This comprehensive guide should help you understand the SP3232EEY-L/TR’s specifications and application. If you have more questions or need further elaboration on any point, feel free to ask!
