Questions tagged [esd]
ElectroStatic Discharge, it's caused by accumulation of electrostatic charge as a result of rubbing, and can damage semiconductor devices like integrated circuits.
719 questions
-1 votes
1 answer
61 views
TVS Diodes for 1 Gigabit Ethernet Interface of Raspberry Compute Module 5 (CM5)
Currently I'm designing a carrier board for the Compute Module 5 and I'm struggling deciding on a suitable TVS-Diode array for the Ethernet interface. The interface should be suitable for 1 Gbit, ...
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0 votes
0 answers
52 views
What is the correct Way to Connect TVS Diodes: Chassis Ground vs PCB Ground?
I’m working on the protection and grounding scheme and would appreciate feedback on whether the grounding approach, TVS return paths, and 12V/5V output-protection circuits are implemented correctly. I’...
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0 votes
0 answers
36 views
USB2514B/M2 Hub Downstream Port Communication Issue (EC200 Programmer)
I am currently encountering an issue with my custom circuit that utilizes the Microchip USB2514B/M2 USB 2.0 Hub Controller for programming an EC200 cellular module (using its USB interface). Setup ...
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1 vote
2 answers
185 views
Schmitt trigger debouncing circuit failure
I have use debouncing circuits for simple mechanical switches (which are connected to the left side of the schematic) It worked just fine on production and a number of devices are deployed in fields. ...
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0 votes
2 answers
58 views
ESD in plastic enclosed electronics - Tripping BMS
I have a fully enclosed plastic Battery (1S2P) that mates to a plastic, enclosed hand-held electronics device. Both are IP67 rated. If I handle the device too much, I can build up a static charge ...
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0 votes
1 answer
65 views
How to combine ESD protection with steady state over voltage protection for ADC input?
As a hobbyist I am planning to build a PCB that reads temperature and pressure sensors with ADC. The signal voltage ranges from 0 to 5V. There might be a situation when someone by mistake connects 12V ...
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1 vote
0 answers
97 views
Best practice for connecting a RF TVS Diode to a SMA connector?
I am designing a 4 layer PCB that will utilize a 900 MHz RF radio that requires a 50 ohm impedance trace going to an SMA connector. This PCB will be inside an aluminum NEMA enclosure, outdoors, and ...
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0 votes
0 answers
36 views
Migrating from EMIF02-USB03F2 to USBDF01W5 for USB ESD/EMI Protection – Schematic Review
I am developing a custom board based on the (STM32F407G-DISC1) MB997E reference design. The original design uses EMIF02-USB03F2 for USB ESD/EMI protection, but since this part is now obsolete, I have ...
0 votes
1 answer
61 views
How do I determine an appropriate ESD TSV diode to protect this device?
I'm a complete novice (Worse: I'm a software engineer), so please assume I don't know even some fairly basic things :) Summary: I'm trying to figure out what kind of TSV ESD protection diode might be ...
-2 votes
1 answer
69 views
ESD protection at CC pins of USB C
Is it necessary to connect CC1 and CC2 with an ESD protection chip? CC1 and CC2 are already connected to ground through resistors.
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0 votes
1 answer
103 views
Relays and ESD: Protection Needed?
Have a relay with a built-in flyback diode. Preparing to do some ESD testing and am uncertain if the input to the relay needs any ESD protection. I understand that IC inputs and other more sensitive ...
0 votes
2 answers
202 views
ESD Protection for UART and I2C
I am designing a PCB board that features the ESP32 as the microcontroller. The UART pins will connect to an external HMI LCD, specifically the TJC (a Chinese version of Nextion), through a screw ...
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3 votes
0 answers
110 views
How to properly shield my system
I have two systems connected via a shielded cable that carries both data and power. I'm trying to minimize EMI both inside and outside the system and also I want to protect my system from ESD. I ...
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0 votes
1 answer
88 views
Will this ESD protection Diode be suitable for this USB-C ESP32 application?
I'm new to ESD protection. Please correct if you find any errors, but here's what I've been told. With data lines D+ and D-, it's best for the ESD diode to have as low junction capacitance as ...
0 votes
1 answer
118 views
Protect Colpitts Oscillators Gate from ESD and Inductive Kickback?
I saw in multiple Colpitts oscillator circuit a 1N914 diode from gate to GND. Is that how one can protect the gate of an JFET? My circuit:
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