The part number "USB2514BI-AEZG" belongs to Microchip Technology, which is a well-known brand in the field of semiconductor solutions, specifically for USB hubs and controllers.
This part number corresponds to a USB 2.0 High-Speed 4-Port Hub Controller IC. Below is a detailed explanation of the pin functions and specifications of the USB2514BI-AEZG IC, including its pinout, pin functionality, circuit principle, and a comprehensive FAQ list.
Package Type:
USB2514BI-AEZG typically comes in a QFN-32 (Quad Flat No-lead) package, which has 32 pins in total. However, the number of pins may vary depending on the specific version.Pinout Overview and Detailed Functionality (QFN-32)
Pin No. Pin Name Pin Function 1 VBUS Input: USB VBUS Power supply for the USB hub. 2 GND Ground pin. 3 VDD Power supply for the IC. 4 VDDIO Input: I/O power supply for the USB port interface . 5 HSUSBDP USB High-Speed Data Plus, D+ line for USB communication. 6 HSUSBDM USB High-Speed Data Minus, D- line for USB communication. 7 USB0- USB 2.0 downstream port 0 negative line. 8 USB0+ USB 2.0 downstream port 0 positive line. 9 USB1- USB 2.0 downstream port 1 negative line. 10 USB1+ USB 2.0 downstream port 1 positive line. 11 USB2- USB 2.0 downstream port 2 negative line. 12 USB2+ USB 2.0 downstream port 2 positive line. 13 USB3- USB 2.0 downstream port 3 negative line. 14 USB3+ USB 2.0 downstream port 3 positive line. 15 RXD USB receiver data line (used for hub data reception). 16 TXD USB transmitter data line (used for sending data from the hub). 17 SUSPEND Active-low signal that tells the device to enter suspend mode to save power. 18 RESET Active-low signal used to reset the USB device. 19 INT# Interrupt pin for signaling events like port status changes or power state changes. 20 OVP Overvoltage protection pin to safeguard against voltage spikes. 21 SEL0 Selects operational modes in conjunction with other configuration pins. 22 SEL1 Selects operational modes in conjunction with other configuration pins. 23 SDA Serial data line for I2C communication to control settings of the IC. 24 SCL Serial clock line for I2C communication to control settings of the IC. 25 CP0 Port configuration pin, used for selecting options for USB port 0. 26 CP1 Port configuration pin, used for selecting options for USB port 1. 27 CP2 Port configuration pin, used for selecting options for USB port 2. 28 CP3 Port configuration pin, used for selecting options for USB port 3. 29 VBUS_MON USB VBUS monitoring pin used to detect the VBUS voltage levels from the USB host. 30 TX_EN Transmitter enable pin used to enable the USB hub data transmission. 31 RX_EN Receiver enable pin used to enable data reception for the hub. 32 POR# Power-on reset pin used to assert a reset signal on power-up.Circuit Principle:
The USB2514BI-AEZG operates as a USB 2.0 hub controller, interfacing between a USB host and multiple USB devices. It is responsible for:
Data traffic management between the host and downstream USB devices. Monitoring and ensuring correct power levels for all connected devices. Providing signals to manage data transmission and power states (suspend, reset, etc.). Handling I2C communication for advanced configuration settings and diagnostics.The USB hub chip takes care of managing all data flows, ensuring that data is routed correctly between the host and devices connected to each downstream port. The I2C interface allows for configuration of the chip's settings such as port power modes, overcurrent protection, and fault handling.
Pin Functionality FAQ
Q: What is the purpose of the VBUS pin on the USB2514BI-AEZG? A: The VBUS pin is used for providing power to the USB hub from the USB host. It is the supply voltage for the USB bus.
Q: What does the GND pin represent? A: The GND pin is the ground reference for the entire device, providing a return path for the power supply.
Q: How does the VDDIO pin work? A: The VDDIO pin supplies power to the I/O interface of the USB hub, powering the USB data lines (D+ and D-) and other logic interfaces.
Q: What is the function of the RESET pin? A: The RESET pin is used to reset the USB hub device. When asserted low, it triggers the internal reset sequence for the hub.
Q: What is the role of the INT# pin? A: The INT# pin is an interrupt output that signals the host when an event, such as a port status change or a power state change, occurs.
Q: How does the SEL0 and SEL1 pins affect the hub operation? A: SEL0 and SEL1 pins are used for selecting various operational modes of the USB hub, such as port configuration or power states.
Q: What does the OVP pin do? A: The OVP pin is used for overvoltage protection, preventing damage to the USB hub from high-voltage spikes on the VBUS line.
Q: Can the USB2514BI-AEZG support USB 3.0 speeds? A: No, the USB2514BI-AEZG is a USB 2.0 high-speed hub controller and does not support USB 3.0 speeds.
Q: What is the function of the SDA and SCL pins? A: SDA and SCL are used for I2C communication to configure the USB hub and to monitor and manage settings for port power, voltage levels, and other diagnostics.
Q: What is the purpose of the CP pins (CP0-CP3)? A: CP pins are used for port configuration, selecting different operational modes for each downstream port.
Q: What is the function of the VBUSMON pin? A: The VBUSMON pin monitors the VBUS voltage level, helping the device determine whether the USB host is providing adequate power to the hub.
Q: How is the TXEN pin used? A: The TXEN pin is used to enable the transmitter for data transmission from the hub to the downstream device.
Q: What happens when the RXEN pin is activated? A: Activating the RXEN pin enables the USB hub's data reception from the downstream devices.
Q: Can the USB2514BI-AEZG be used for charging applications? A: Yes, the USB2514BI-AEZG supports charging features for downstream USB devices, managing power delivery.
Q: What is the function of the USB0+, USB0-, etc. pins? A: These are the data lines for each of the downstream USB ports, with each port having a pair of lines (USB+ and USB-) for data transmission.
Q: How many downstream ports can the USB2514BI-AEZG support? A: The USB2514BI-AEZG supports 4 downstream USB ports for connecting devices.
**Q: What happens when the SUSPEND pin