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    A generic fixed resistor for rapid developing circuit topology. Save precious design time by seamlessly add more information to this part (value, footprint, etc.) as it becomes available. Standard resistor values: 1.0Ω 10Ω 100Ω 1.0kΩ 10kΩ 100kΩ 1.0MΩ 1.1Ω 11Ω 110Ω 1.1kΩ 11kΩ 110kΩ 1.1MΩ 1.2Ω 12Ω 120Ω 1.2kΩ 12kΩ 120kΩ 1.2MΩ 1.3Ω 13Ω 130Ω 1.3kΩ 13kΩ 130kΩ 1.3MΩ 1.5Ω 15Ω 150Ω 1.5kΩ 15kΩ 150kΩ 1.5MΩ 1.6Ω 16Ω 160Ω 1.6kΩ 16kΩ 160kΩ 1.6MΩ 1.8Ω 18Ω 180Ω 1.8KΩ 18kΩ 180kΩ 1.8MΩ 2.0Ω 20Ω 200Ω 2.0kΩ 20kΩ 200kΩ 2.0MΩ 2.2Ω 22Ω 220Ω 2.2kΩ 22kΩ 220kΩ 2.2MΩ 2.4Ω 24Ω 240Ω 2.4kΩ 24kΩ 240kΩ 2.4MΩ 2.7Ω 27Ω 270Ω 2.7kΩ 27kΩ 270kΩ 2.7MΩ 3.0Ω 30Ω 300Ω 3.0KΩ 30KΩ 300KΩ 3.0MΩ 3.3Ω 33Ω 330Ω 3.3kΩ 33kΩ 330kΩ 3.3MΩ 3.6Ω 36Ω 360Ω 3.6kΩ 36kΩ 360kΩ 3.6MΩ 3.9Ω 39Ω 390Ω 3.9kΩ 39kΩ 390kΩ 3.9MΩ 4.3Ω 43Ω 430Ω 4.3kΩ 43KΩ 430KΩ 4.3MΩ 4.7Ω 47Ω 470Ω 4.7kΩ 47kΩ 470kΩ 4.7MΩ 5.1Ω 51Ω 510Ω 5.1kΩ 51kΩ 510kΩ 5.1MΩ 5.6Ω 56Ω 560Ω 5.6kΩ 56kΩ 560kΩ 5.6MΩ 6.2Ω 62Ω 620Ω 6.2kΩ 62KΩ 620KΩ 6.2MΩ 6.8Ω 68Ω 680Ω 6.8kΩ 68kΩ 680kΩ 6.8MΩ 7.5Ω 75Ω 750Ω 7.5kΩ 75kΩ 750kΩ 7.5MΩ 8.2Ω 82Ω 820Ω 8.2kΩ 82kΩ 820kΩ 8.2MΩ 9.1Ω 91Ω 910Ω 9.1kΩ 91kΩ 910kΩ 9.1MΩ #generics #CommonPartsLibrary
  • Generic Capacitor
    A generic fixed capacitor for rapid developing circuit topology. Save precious design time by seamlessly add more information to this part (value, footprint, etc.) as it becomes available. Standard capacitor values: 1.0pF 10pF 100pF 1000pF 0.01uF 0.1uF 1.0uF 10uF 100uF 1000uF 10,000uF 1.1pF 11pF 110pF 1100pF 1.2pF 12pF 120pF 1200pF 1.3pF 13pF 130pF 1300pF 1.5pF 15pF 150pF 1500pF 0.015uF 0.15uF 1.5uF 15uF 150uF 1500uF 1.6pF 16pF 160pF 1600pF 1.8pF 18pF 180pF 1800pF 2.0pF 20pF 200pF 2000pF 2.2pF 22pF 20pF 2200pF 0.022uF 0.22uF 2.2uF 22uF 220uF 2200uF 2.4pF 24pF 240pF 2400pF 2.7pF 27pF 270pF 2700pF 3.0pF 30pF 300pF 3000pF 3.3pF 33pF 330pF 3300pF 0.033uF 0.33uF 3.3uF 33uF 330uF 3300uF 3.6pF 36pF 360pF 3600pF 3.9pF 39pF 390pF 3900pF 4.3pF 43pF 430pF 4300pF 4.7pF 47pF 470pF 4700pF 0.047uF 0.47uF 4.7uF 47uF 470uF 4700uF 5.1pF 51pF 510pF 5100pF 5.6pF 56pF 560pF 5600pF 6.2pF 62pF 620pF 6200pF 6.8pF 68pF 680pF 6800pF 0.068uF 0.68uF 6.8uF 68uF 680uF 6800uF 7.5pF 75pF 750pF 7500pF 8.2pF 82pF 820pF 8200pF 9.1pF 91pF 910pF 9100pF #generics #CommonPartsLibrary
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  • RMCF0805JT47K0
    47 kOhms ±5% 0.125W, 1/8W Chip Resistor 0805 (2012 Metric) Automotive AEC-Q200 Thick Film #forLedBlink
  • 875105359001
    10uF Capacitor Aluminum Polymer 20% 16V SMD 5x5.3mm #forLedBlink #commonpartslibrary #capacitor #aluminumpolymer #radialcan
  • CTL1206FYW1T
    Yellow 595nm LED Indication - Discrete 1.7V 1206 (3216 Metric) #forLedBlink
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C1
Capacitance
1u F
U2
Manufacturer Part Number
ME6206A33XG
D-
C2
Capacitance
1u F
R1
Resistance
5.1k Ω
J1
U3
Manufacturer Part Number
NUF2221W1T2G
VDD
D+
R2
Resistance
5.1k Ω

USB-C Receptacle with built-in ESD Protection and 3V3 LDO Smart Module

USB-C Receptacle with built-in ESD Protection and 3V3 LDO Smart Module
Description

Created
December 22nd 2021
Last updated by jharwinbarrozo
a year ago
1 Contributor(s)
jharwinbarrozo

Controls

Voltage Output
3.3V

Properties

Designator Prefix
Module

Availability & Pricing

DistributorQty 1
Digi-Key$0.17–$0.34
LCSC$0.38
Mouser$0.27

Assets

Simulation

µs

Simulation Speed

@copilot is there any protection that can be done on usb port?
@copilot is there any protection that can be done on usb port?
10mo
Yes, protecting a USB port is crucial for the longevity and reliability of both the device containing the USB port and the devices connected to it. Based on your project, which already includes some protection elements, there are several strategies to enhance USB port protection further:
  1. ESD Protection: Your design already incorporates an ESD protection IC (U3: NUF2221W1T2G by onsemi), which is a great start. ESD protection devices help to protect sensitive electronic components from electrostatic discharges during handling or in the event of a static shock.
  2. Overcurrent Protection: Implementing a fuse or a Positive Temperature Coefficient (PTC) resistor can protect the USB port from current overloads. A resettable fuse (PTC) is beneficial as it returns to normal operation once the overcurrent condition ceases.
    • Connect a PTC fuse in series with J1:VBUS.
  3. Overvoltage Protection: Overvoltage can be detrimental to devices connected to the USB port. A Transient Voltage Suppression (TVS) diode can be added to protect against voltage spikes.
    • Connect a TVS diode across the VBUS and GND pins of the USB receptacle (J1) to clamp voltage spikes to safe levels. Make sure the TVS diode's working voltage is slightly above 5V and can handle the transient power.
  4. Reverse Voltage Protection: To prevent damage from reverse voltage connection, a Schottky diode can be placed in series with the VBUS line to block negative voltages.
    • Connect a Schottky diode in series with J1:VBUS pin, ensuring the cathode of the diode faces the internal circuitry, to provide reverse polarity protection.
  5. Data Line Protection: While ESD protection on data lines is covered by U3, considering additional filtering or protection components can further improve resilience. For high-speed data lines, ensure that any added components do not significantly degrade the signal integrity.
  6. Quality USB Connectors: Using high-quality USB connectors with better mechanical construction and materials can also enhance durability and provide better shielding against electromagnetic interference (EMI).
  7. Implementing a Self-Powered Design: For devices that can afford it, designing the USB interface to be self-powered (rather than bus-powered) can offer an additional layer of protection from issues related to the host's power stability.
Remember, the key to effective protection is not just about adding components but ensuring they are correctly rated and properly integrated into your design. Always verify with simulations or calculations where possible, and consult datasheets or application notes for specific components to make informed decisions.
10mo
@copilot What is CC1 and CC2 in this schematic means
@copilot What is CC1 and CC2 in this schematic means
10mo
In the context of your schematic, CC1 and CC2 refer to the Configuration Channel pins of the USB-C connector. These pins play a crucial role in the USB Type-C specification for detecting cable orientation and managing power delivery and data roles between devices. Here's a breakdown of their functions:
  • CC1 and CC2: Each USB-C connector has two Configuration Channel pins, labeled CC1 and CC2. The presence of two such pins allows the USB-C cable to be reversible. When a USB-C cable is connected, the orientation (which side is up) is determined by which of these pins makes contact. This flexibility is one of the key improvements of USB-C over previous USB connectors.
These pins are used for several purposes:
  • Determining the orientation of the cable connected to the port.
  • Initiating the Power Delivery (PD) protocol if the devices on either end support it. This can negotiate higher power levels than standard USB connections, allowing for fast charging and powering of larger devices.
  • Identifying the attached device or cable type, which helps in determining the data roles (host or device) and the available modes of operation (for example, DisplayPort, Thunderbolt, or USB data).
In your project:
  • CC1 is connected through a resistor (labelled R1), likely for cable orientation detection or as part of a USB Power Delivery communication circuit.
  • CC2 is similarly used, with a resistor (labelled R2), indicating a mirrored setup to support either orientation of the USB-C plug.
These connections suggest your design supports basic USB-C functionality with considerations for orientation detection and possibly power negotiation, depending on the connected devices and cable.
10mo
what is vdd?
1y
VDD is a label typically used to denote the positive supply voltage in a circuit. The terminology comes from MOSFET terminology, where "V" stands for voltage, "D" for Drain, and the second "D" indicates that this is the voltage at the Drain with respect to the substrate.
In your project, VDD is likely the power supply for the EMI Filter (U3) and the LDO Voltage Regulator (U2). It's also connected to capacitor C2. The exact voltage level would depend on the specifications of these components and the requirements of your design.
1y
what is the typical value of vdd?
1y
The typical value for VDD can vary greatly depending on the specific IC and the technology used. However, here are some common values:
  • For many modern low-power ICs, such as those used in battery-powered devices, a common VDD value is 1.8V.
  • For many CMOS logic ICs, common VDD values are 3.3V and 5V.
  • For some older or high-power ICs, VDD might be as high as 12V, 15V, or even 24V.
However, the exact value you should use for VDD in your circuit depends on the specifications of the specific components you're using. For instance, the LDO regulator in your circuit (ME6206A33XG) outputs a fixed 3.3V, suggesting that any connected components are likely operating at this voltage. Always refer to the datasheets for your components to determine the appropriate supply voltage.
1y
what is vdd in this circuit?, assuming a usb-c connection
1y
In the context of your circuit, with a USB-C connection, VDD would typically be the power supply rail for digital logic, which would usually be at 3.3V or 5V.
However, since you have an LDO regulator (ME6206A33XG) in your circuit that outputs a fixed 3.3V, the VDD in this circuit would be 3.3V. This is assuming that the USB-C power supply is providing a voltage higher than 3.3V (such as the standard 5V from a USB power source), which is then being regulated down to 3.3V by the LDO for use in your circuit.
Please confirm this information from the datasheet or from your circuit design requirements.
1y
why is 3v3 and vdd separate?
@copilot why is 3v3 and vdd separate?
1y
In this circuit, VDD is the unregulated voltage input from the USB VBUS pin, while 3V3 is the regulated 3.3V output from the LDO regulator (U2: ME6206A33XG).
They are separated in the netlist because they represent different voltages in the circuit.
  • VDD is connected to the input of the LDO regulator and the EMI Filter VDD pin.
  • 3V3 is the output from the LDO regulator which provides a stable 3.3V power supply to other components in the system.
The separation of these nets helps ensure that the higher, unregulated voltage from VDD doesn't interfere with the components that require a stable 3.3V supply, and it allows for better tracking of power flow and fault isolation in the circuit.
1y
Add an ESP32
Add an ESP32
1y
Hey, I'm copilot! I can help you with all kinds of stuff in your project. Reac...
Hey, I'm copilot! I can help you with all kinds of stuff in your project. Reach me at any time by tagging me on comments or in the chat with my handle, @copilot.
1y
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Checks that the power traveling across a given resistor is under its rating with 50% headroom.
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