USB2642 No voltage on 1,8VPLL (mkuczma)
Hi, I have a problem with USB hub USB2642. I designed a board with self supply , Pin REG_EN is floating - there is 3,3V and got 1,8V on pin 15 - VDD18, but there is 0V on pin 46 - VDD18PLL and 0V on...
View ArticleUSB3740B-AI9-TR switch issue (KV89)
Hi,in my design I am using the USB3740B-AI9-TR Multiplexer to switch USB 2.0 High-Speed signals depending on the insert direction of USB-Type C cable. The Type C controller UTC2000/MG is switching...
View ArticleUSB7002 HUB cannot send USB 3.0 test packet (GiuseppeALTEN)
Dear community members, Thank you for your support. I configured a USB 3.0 port connected to USB7002 hub and need to test electrical compliance.I was able to set the port to USB 2.0 test mode to send...
View ArticleMCP2561E/SN FIT Rate (MarcItrich)
Hello Microchip Team, I need the reliability data (FIT values) of the MCP2561E/SN CAN transceivers. Unfortunately these are not available via https://www.microchip.com...tyreport/Default.aspx. Can you...
View ArticleUSB5742 and 2xUSB2.0 to USB3.0 Hub (InigoMonge)
Hi everyone, First of all thank you for your time. I am new in the USB world so forgive me if I get some terminology wrong. We are designing a board that has a controller with one USB3.0 port...
View ArticleMCP47CVB22 DAC registers not matching datasheet? (jimmy37)
I recently build a board using the 2 channel MCP47CVB22 DAC. I have the DAC connect to a Raspberry Pi and am using the following commands from the Pi to set the DAC:(correctly sets the VOUT0)sudo...
View ArticleMCP39F521 RMS Voltage Floating. (isarican)
I have question about MCP39F521.I used the schematic from “MCP39F521 Power Monitor Demonstration Board User’s Guide”, neutral is connected to DGND with an ferride bead.When I don’t apply AC voltage...
View ArticleMCP3564 - ADCDATA Always 0 But Can Read And Write Other Registers (LBound)
Hi, I seem to be unable to get any actual data out from my MPC3564. I am able to read and write to any of the other registers, but when reading from ADCDATA I always get 0 back. I've tried to change...
View ArticleMTCH101 (DM160220) used as proximity sensor (tht85)
Hello all, I am trying to use the MTCH101 as proximity sensor (demo board DM160220); my application must be capable to maintain state presence / no presence also after power down. The main issue that I...
View ArticleAny stabilizing time required after setting current gain in ATM90E36A...
Hi, I am using ATM90E36A for three phase current measurement. And getting correct current on all phase. To get correct current we need to set current gain(in required case)Do we need any...
View ArticleMCP73831 not charging (gercer)
Hello! 2 years ago I started to design a PCB using a MCP73831T-2ACI/OT and a li-po battery. The battery has a protection circuit. Even though I designed the PCB it is the only time I have worked with a...
View ArticleMCP4017 - RAB Drift over Lifetime (simonfilgis)
Hi all, does somebody know how MCP4017's RAB will drift over lifetime? Is end of line calibration a option? Best Regards, Simon..
View ArticleTo generate dual output pulse from two wires transformer (HighTechPower)
Hi. I want to design a transformer power supply circuit which takes 220 VAC as input and produce 12 VAC output. The hard part is the transformer has only two wires as secondary instead of three. As...
View ArticleTC77 stuck on 168.37 °C (while at ambiant temperature) (paulandre)
Hello, I have a problem with some TC77 on our last production: The first temperature readings are correct (one reading every 10 seconds), then after a variable time (typically a couple of hours), the...
View ArticleStrange Microchip device... (Qwertz)
Dear Community,I have a schematic containing a strange device. Neither I have a datasheet nor does the internet knows anything useful so far (I used google ). Form the circuit its either sort of charge...
View ArticleMCP37D31 (u741)
Hello,I wonder whether anyone has seen any code posted for interfacing a MCP37D31(-200) 200MSps ADC, i.e. for configuring and data readout of this device. I intend to run it with a dsPIC33CK, but any...
View ArticleLAN9250 not working (swanand)
Hi all,i am working on LAN9250 with stm32l073 micro-controller over SPI. i found one example code of interfacing LAN9250 with PIC controller here and with reference to that i have written the code for...
View ArticleSY75576LKY-TR: LVDS configuration (Jujakarr)
Dear Forum, i want to use the SY75576LKY-TR in a new design, with LVDS-input and LVDS-output. Two questions: 1) Do i need AC-coupling at the input (LVDS-signal)? 2) Possible to use for the output...
View ArticlePM8576 PCIe switch and two root complex with same end point device (hardikr)
Hi, We have 2 CPU boards connected with pcie switch and both boards wants to communicate with same GPU board connected with PCIe switch.1) Can both CPU board get the data from GPU at the same time ?2)...
View ArticleHepl with MCP356X full shutdown (Paulo_rlb)
Hi all,I am working with an MCP3561 and I am not able to put it in full shutdown mode (<10uA current). I have been using it for some time but this is the first time I effectivelly needed to set full...
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