DS90UB947TRGCRQ1 Detailed explanation of pin function specifications and circuit principle instructions
The DS90UB947TRGCRQ1 is a part of the Texas Instruments (TI) product family, specifically under the FPD-Link III (Flat Panel Display Link) category. It is a serializer used for transmitting video data from the source device to a display over high-speed differential links.
Package Information
The DS90UB947TRGCRQ1 is available in a QFN (Quad Flat No-lead) package, and the exact pin count for this device depends on its specific version. Based on the TI datasheet for this part, it typically comes in a 48-pin QFN package.
Now, let's break down the pin functions and describe the usage of each pin in this package, along with their specific characteristics. I'll start by detailing the pin function list for the 48-pin QFN package.
Pin Function List for DS90UB947TRGCRQ1
This part features 48 pins and each has a specific role, which is outlined below:
Pin Number Pin Name Pin Type Pin Description 1 VDD3P3 Power 3.3V power supply for core operation 2 GND Ground Ground pin 3 TX0+ Signal Positive differential signal for Video data transmission 4 TX0- Signal Negative differential signal for Video data transmission 5 TX1+ Signal Positive differential signal for Video data transmission 6 TX1- Signal Negative differential signal for Video data transmission 7 TX2+ Signal Positive differential signal for Video data transmission 8 TX2- Signal Negative differential signal for Video data transmission 9 TX3+ Signal Positive differential signal for Video data transmission 10 TX3- Signal Negative differential signal for Video data transmission 11 VDD18 Power 1.8V power supply for specific parts of the device 12 GND Ground Ground pin 13 CEC Signal Consumer Electronics Control (CEC) line used for device control communication 14 I2C SDA Signal I2C Data Line for serial communication (Used for configuration and control) 15 I2C SCL Signal I2C Clock Line for serial communication (Used for configuration and control) 16 FPDLINKCLK+ Signal Positive clock differential pair for FPD-Link interface 17 FPDLINKCLK- Signal Negative clock differential pair for FPD-Link interface 18 VDD18 Power 1.8V power supply for FPD-Link interface 19 GND Ground Ground pin 20 NC No Connect Pin is not internally connected 21 NC No Connect Pin is not internally connected 22 NC No Connect Pin is not internally connected 23 NC No Connect Pin is not internally connected 24 NC No Connect Pin is not internally connected 25 NC No Connect Pin is not internally connected 26 NC No Connect Pin is not internally connected 27 NC No Connect Pin is not internally connected 28 NC No Connect Pin is not internally connected 29 NC No Connect Pin is not internally connected 30 NC No Connect Pin is not internally connected 31 NC No Connect Pin is not internally connected 32 NC No Connect Pin is not internally connected 33 NC No Connect Pin is not internally connected 34 NC No Connect Pin is not internally connected 35 NC No Connect Pin is not internally connected 36 NC No Connect Pin is not internally connected 37 NC No Connect Pin is not internally connected 38 NC No Connect Pin is not internally connected 39 NC No Connect Pin is not internally connected 40 NC No Connect Pin is not internally connected 41 NC No Connect Pin is not internally connected 42 NC No Connect Pin is not internally connected 43 NC No Connect Pin is not internally connected 44 NC No Connect Pin is not internally connected 45 NC No Connect Pin is not internally connected 46 NC No Connect Pin is not internally connected 47 NC No Connect Pin is not internally connected 48 NC No Connect Pin is not internally connectedPin FAQ and Questions for the DS90UB947TRGCRQ1
Here are 20 frequently asked questions (FAQs) about this chip model:
What is the power supply voltage for the DS90UB947TRGCRQ1? The DS90UB947TRGCRQ1 requires a 3.3V core supply (VDD3P3) and a 1.8V supply (VDD18) for other functions. What is the function of the TX0+, TX0-, TX1+, TX1- pins? These pins form the differential pairs for transmitting high-speed video data. Can I use the I2C lines for configuration? Yes, the I2C SDA and SCL lines are used for configuration and control. What is the purpose of the FPD-Link clock? The FPD-Link clock pins (FPDLINKCLK+ and FPDLINKCLK-) carry the clock signal for the FPD-Link interface, which synchronizes data transmission. Do I need to connect all NC pins? No, NC (No Connect) pins do not require any connection. What should I do if my system has different power supply voltages? Ensure the voltages match the specified requirements (3.3V for core and 1.8V for FPD-Link). Can the DS90UB947TRGCRQ1 operate without the CEC pin connected? While the CEC pin is optional, connecting it provides additional functionality for consumer electronics control. How do I connect the ground pins? Connect all GND pins to the system ground to ensure proper device operation. How is the serializer configured? The configuration can be done through the I2C interface by writing specific commands to the I2C registers. What is the maximum data rate for the DS90UB947TRGCRQ1? The maximum data rate for the device depends on the clock and the configuration, typically up to 3.0 Gbps per lane. Are there any thermal considerations for this part? Yes, proper thermal management should be considered, especially when the device operates at high speeds. What is the function of the VDD18 pin? The VDD18 pin supplies 1.8V power to the FPD-Link interface section of the device. What is the maximum ambient temperature for this part? The maximum ambient temperature typically is up to 125°C, as per the Q1 (Automotive) grade requirements. Can I use this part for automotive applications? Yes, this part is qualified for automotive applications (Q1 grade), suitable for use in automotive environments. What are the advantages of using the DS90UB947TRGCRQ1 for display systems? It provides high-speed transmission, low power consumption, and supports long-distance data transmission for displays. Is this device compatible with HDMI? The DS90UB947TRGCRQ1 is designed for FPD-Link III, not directly HDMI. However, it can be used with HDMI interfaces through appropriate adapters. Do I need to use the TX differential pair pins in pairs? Yes, TX+ and TX- must always be used as differential pairs for proper signal transmission. What is the recommended PCB layout for the DS90UB947TRGCRQ1? A detailed PCB layout recommendation can be found in the datasheet to ensure signal integrity and proper routing. Is this device backward compatible with previous FPD-Link versions? The DS90UB947TRGCRQ1 is backward compatible with earlier FPD-Link interfaces, supporting legacy systems. Can I use this device without the FPD-Link interface? The FPD-Link interface is critical for operation; without it, the device cannot function.This overview provides a detailed explanation of the pins, their functions, and some frequently asked questions for the DS90UB947TRGCRQ1. For further detailed technical specifications and guidelines, consulting the official datasheet is always recommended.
