The part you referenced, " USB2514BI-AEZG -TR," is part of the Microchip brand. It is a USB 2.0 Hub Controller. Here’s the detai LED information based on your request:
1. Pin Function Specifications and Circuit Principles
The USB2514BI-AEZG-TR is a 4-port USB 2.0 hub controller with integrated high-speed transceiver s. This chip uses a 48-pin QFN (Quad Flat No-lead) package, which is typical for compact USB hubs. The functionality of each pin can be broadly divided into several categories such as Power , control, data signals, and communication lines.
2. Pinout Description (Pin Function List for 48 Pins)
Pin Description Table: Pin # Pin Name Pin Function Description 1 VBUS USB Bus Power (5V) input for powering the device from the USB bus. 2 VDD 3.3V power supply for the internal logic of the chip. 3 VSS Ground reference for the device. 4 ID Identification pin used in OTG mode to differentiate between host and peripheral roles. 5 N.C. No connection. Reserved for future use or package pin assignments. 6 DP (D+) USB Data+ pin for high-speed USB data transmission. 7 DM (D-) USB Data- pin for differential signal for USB communication. 8 N.C. No connection. 9 VBUS_SENSE Voltage sensing pin to detect the presence of VBUS power from USB. 10 RESET Reset input pin to initialize the device from a low state. 11 SUSPEND Pin that indicates the USB device has entered suspend mode. 12 MODE Configuration input pin to select the operational mode (full-speed or low-speed). 13 D0 (Data 0) Data pin for first USB port communication. 14 D1 (Data 1) Data pin for second USB port communication. 15 D2 (Data 2) Data pin for third USB port communication. 16 D3 (Data 3) Data pin for fourth USB port communication. 17 VBUS_MONITOR Voltage monitoring pin for checking voltage stability on the VBUS input. 18 TEST1 Test pin, used for debugging and internal testing. 19 TEST2 Test pin, used for debugging and internal testing. 20 N.C. No connection. Reserved for future use. 21 GND Ground pin. 22 GND Ground pin. 23 PWR_EN Power enable pin used to control the power to the downstream devices. 24 USBHOSTPWR Host power control pin to ensure the USB host provides adequate power to the devices. 25 L3 Link detection and status monitoring. 26 N.C. No connection. 27 POR_B Power-on reset pin. 28 OC Overcurrent detection input pin to monitor the current draw by downstream devices. 29 PWR_GOOD Power-good output indicating stable power to downstream devices. 30 SENSE Pin to detect connection and disconnection events on downstream devices. 31 LED_CTRL LED control pin for visual indication of operational status. 32 SCL Serial clock line for I2C communication (for configuration and control). 33 SDA Serial data line for I2C communication (for configuration and control). 34 FS_EN Full-Speed mode enable pin, controls switching between USB Full-Speed mode and High-Speed mode. 35 FSEL Full-Speed Select pin for configuring full-speed or low-speed operation. 36 X1 External clock input pin for frequency synchronization. 37 X2 External clock output pin for synchronizing other devices. 38 SEL1 Selection pin for determining specific configurations of the device. 39 SEL2 Selection pin for additional configuration of the device. 40 SEL3 Another selection pin for configuration. 41 N.C. No connection. 42 N.C. No connection. 43 N.C. No connection. 44 N.C. No connection. 45 N.C. No connection. 46 N.C. No connection. 47 VSS Ground reference pin. 48 VSS Ground reference pin. Notes: N.C. means no connection, and these pins are often reserved for future use or are simply not connected to anything in the current configuration. TEST1 and TEST2 are for internal testing and debugging purposes.3. 20 Common FAQs for the USB2514BI-AEZG-TR
Q1: What is the purpose of the USB2514BI-AEZG-TR? A1: The USB2514BI-AEZG-TR is a USB 2.0 hub controller designed to support 4 downstream USB 2.0 ports, allowing for multiple devices to be connected to a single USB host.
Q2: What is the power supply requirement for the USB2514BI-AEZG-TR? A2: The chip requires a 3.3V supply for its internal logic and a 5V VBUS input for powering the USB ports.
Q3: What is the operating temperature range of this device? A3: The operating temperature range is typically from -40°C to +85°C.
Q4: How many downstream USB ports does the USB2514BI-AEZG-TR support? A4: The USB2514BI-AEZG-TR supports up to four downstream USB ports.
Q5: What is the significance of the RESET pin? A5: The RESET pin is used to initialize the device from a low state, ensuring it operates properly when powered on.
Q6: What type of package does the USB2514BI-AEZG-TR come in? A6: It comes in a 48-pin QFN (Quad Flat No-lead) package.
Q7: Can the USB2514BI-AEZG-TR support both USB high-speed and low-speed devices? A7: Yes, it supports both high-speed (480 Mbps) and low-speed (1.5 Mbps) USB devices.
Q8: What is the role of the SUSPEND pin? A8: The SUSPEND pin is used to indicate that the USB device has entered suspend mode, which reduces power consumption.
Q9: What is the role of the VBUSSENSE pin? A9: The VBUSSENSE pin is used to detect the presence of the VBUS power line to determine if the device is connected to a host.
Q10: What is the purpose of the LEDCTRL pin? A10: The LEDCTRL pin is used to control the status LED that provides visual indication of the USB hub’s operational status.
Q11: How does the USB2514BI-AEZG-TR handle overcurrent situations? A11: The OC pin detects overcurrent conditions and helps protect downstream devices from excessive power draw.
Q12: What is the function of the N.C. pins? A12: The N.C. pins are not connected and are either reserved for future use or left unused in this configuration.
Q13: What is the role of the SDA and SCL pins? A13: The SDA (data) and SCL (clock) pins are used for I2C communication to configure and control the hub’s operation.
Q14: Can this chip support USB 3.0 speeds? A14: No, the USB2514BI-AEZG-TR supports USB 2.0 speeds (high-speed and low-speed), but it does not support USB 3.0.
Q15: What does the power-good output pin indicate? A15: The PWR_GOOD pin indicates whether the device is receiving stable and sufficient power.
Q16: How does the chip manage power distribution to downstream devices? A16: The PWR_EN pin allows control over
