Questions tagged [integrated-circuit]

An integrated circuit (IC) is an electronic circuit built onto a single plate of a semiconductor material, normally silicon. Modern ICs may contain billions of transistors and they have played a major part in the miniaturization and performance improvements of modern electronic systems.

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Buck IC (XL4015) feedback logic

The datasheet for the XL4015 has the following information about the feedback loop: The threshold feedback voltage is 1.25V The switching frequency is 180Khz If the feedback voltage exceeds 3.3V, the ...
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Where can I find the RF69H Transceiver IC? [closed]

I found this module on the Digi-Key: https://www.digikey.com/en/products/detail/sparkfun-electronics/COM-13909/6023504?s=N4IgTCBcDaIMIHkCyBaAjAZgJwAYsgF0BfIA and I want to find the actual RF69H IC ...
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Cascoded op-amp: What practically limits CMRR and input impedance?

I am interested to better understand the practical limitations to input impedance and common-mode rejection ratio in cascoded op-amp structures. I already simulated quite a bit, but I am running into ...
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Do you understand this circuit?

I'm trying to reverse engineer this circuit so that I can use the buttons with a microcontroller. The problem is with buttons on the left. Counting from right to left, above on pin 7, I think that's ...
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D flip-flop frequency divider

I'm using a transmission gate base DFF to build a simple frequency divider. It worked, but I'm getting some weird waveform at some intermediate nodes and the power consumption is high too (11 μW). ...
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Please help me identify this IC - top marking 39AA

This IC is from an auto radio. I don't know what caused the problem but I need this one.
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Can I make GND vias like this under my QFN package?

Can I make GND vias like this under my QFN package?
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How to create a part in Eagle that consists of multiple other symbols? (with elements that share the same pin)

I'm trying to create an Eagle part for an IC which is an array of 5 matched transistors (eg CA3046/CA3086/AS3046D). Two of the transistors are a differential pair that share the same IC pin (pin3). I'...
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Can someone confirm the typical application circuit of MAX664x Fan controller datasheet?

I'm planning to use the MAX 6644 for a simple fan control application. All in all the IC is very straight forward to use. However after analyzing the typical application circuits in the datasheet I ...
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Feasibility of building a benchtop chip fab for prototyping

This is generally quite a vague question as I'm new to the space but I've been thinking a lot about prototyping in the IC/semiconductor space and have been wondering about the feasibility of ...
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Need help identifying SMD IC

I have a Network Video Recorder, Chinese one, NBD8016S-XC v2.03. I think it had an electrical shock after power outage, just want to try to repair it. I have found the IC that is burnt, but can not ...
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LTC2944 shorting

So I am using a LTC2944 battery fuel gauge IC. When a 48V(nominal) Li-Ion battery is connected to measure, the IC shorts. When I measure the battery voltage using a multimeter it is 52.6V which is ...
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Part identify - unknown and no information

I'm looking for datasheet or information about this IC
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How to replace a 8 channel DIP switch with a chip that controls it digitally [closed]

There is a 8 channel DIP switch whose state i wanted to change dynamically using a microcontroller. I thought of using an array of mosfets that will do the job. Kindly suggest me a DIP package or a ...
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Role of NTC thermistor [closed]

I have this circuit: simulate this circuit – Schematic created using CircuitLab In this schematic I don’t understand what the NTC does. When the resistors and the NTC get headed R1 is increased ...
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Is there a process for choosing between similar board-level components?

I am working on my first small PCB and I have a good idea of the types of components I need to use. However when I get over to Mouser Electronics and start punching in search criteria, I am often ...
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RMS current for capacitor after placement of TVS diode

Following circuit is a part of the product and capacitor C2 and D2 were damaged due to very high current high frequency transient noise. I am simulating the circuit by coupling the high voltage AC ...
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Can we use an integrator circuit as a Hilbert transformer?

I want to know about the hardware implementation of Hilbert transform. Can an integrator circuit be used to introduce a -90° phase shift to the input signal?
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A question about an IC current sensor functionality

I'm trying to understand the VOC and FAULTB pins of this IC sensor(MCR1101-20-5). As far as I understand, this sensor can measure -20A to +20A DC current and for the model I have the transfer function ...
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128 bit addition using 4 bit adder

In one of the interviews that I attended, I was asked the following question: Design a circuit that we can use to add two 128-bit numbers, you have only one 4-bit adder and no other adder IC. You are ...
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Dual cell charging

I am using GS7001B dual cell charging IC. The schematic I used is as shown below with layout image. With this I got output voltage of 11.8V when supplied 12 volt at the input. But according to the ...
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WARNING (ORNET-1119) PSpice cadence Orcad

Does anyone know how to solve this error green DRC maker using OrCAD cadence 17.4? WARNING (ORNET-1119): The part/device cannot be simulated. No PSpiceTemplate found on U1, ignoring this part/device ...
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Problem on biasing of the differential folded cascode with ideal and non-ideal CMFB

For this circuit, a PMOS input stage folded cascode amplifier as a gain booster, I have two questions. The PMOSs (Mppp1 to Mppp4) in the cascode banches are in strong-inversion saturation while the ...
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How to solve "no simulator model" in Proteus?

I would like to do a simulation using the SPV1050 in Proteus, but Proteus says "no simulator model." What does that mean? Is it only for PCB design, so not suitable for doing simulation to ...
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Active inductor

I am designing active inductor using OTAs (Transconductance amplifiers) and have a problem writing an equations. I wrote two equations for nodes V2+ and V2- and input current Iin. $$ 0=sCV^+_{2}+g_1(...
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How do you cascade two 7-segment decoder ICs together?

We used one 74LS47 IC in our lab, which we connected to a 7-segment display and tested the outputs. Now our instructor has told us to cascade two 7447 ICs together and implement it on a 7-segment ...
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Need to find a description for the CSC7102C [closed]

I was trying to search for the CSC7102C on google and couldn't find any description for it. What is the function of this IC?
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Power combiner for I-Q signals in a transmitter

I have a transmitter project to implement. Part of the project is to combine an in-phase and an out of phase (90 degree difference) signal with a center frequency at 3.5GHz. I figured I could ...
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DC-DC converter fault output

We have a design using 4 EM2130L02QI dc/dc converter all with very similar routing and component placement. the output gets shorted to GND and never changed . the same board that contain with another ...
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What is the SGMII differential peak to peak voltage?

I am trying to understand the SGMII Driver and Receiver DC specification. Here is the link to SGMII specification - SGMII.pdf I am studying. Table-1: Driver DC specification Table-2: Receiver DC ...
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What type of component is the AMTEX ST033?

I want to know the IC used for this Nintendo 64 heartbeat detector peripheral. As seen in the image is an ST033 AMTEX (9836 which is probably a serial number) but a Google search won't show any ...
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Should I use a resistor in series when connecting a pin to logic level high?

I'm trying to design a circuit with MAX8934AETI+. I'm confused about how to connect a pin to logic level high. For example, pin 6 in the picture below is meant to be connected to logic level high to ...
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Is there any method to turn any PWM DC-DC converter to its small signal model at circuit level?

Is there any method to turn any PWM DC-DC converter to its small signal model at circuit level? As I know the PWM switch model does that well but it only applies to simple circuits and the switches ...
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Unknown IC identification - six pin SMD marked ADZ

Does anyone have any idea what this chip is?
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Contradictory information in current capability of open drain output for the MAX7317 IO expander

I am looking at the datasheet of the MAX7317 IO expander and it is not clear to me if it can drive simultaneously 8 pins when each pin sinks 16mA. I don't have a lot of options because I need SPI. The ...
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CD4053B Triple 2:1 MUX/DEMUX For Switching Three LED Channels To Multiple Zones

My last post (Multi-Zone Addressable RGB+CCT LED Mode Switching) got closed as off-topic because I was “seeking recommendations for a specific product”... I found on my own what I believe to be the ...
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Understanding Spec sheet of IC

I'm having trouble understanding the spec sheet of this shift register. What I want to do is to connect a (generic red one, I don't have any specs) LED which will approximately use 15-35 mA to the IC. ...
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Is it better if each integrated circuit has a dedicated voltage regulator?

I have a circuit consisting of an ESP32 microcontroller and some integrated circuits. Is it better if each integrated circuit has its own voltage regulator? Example: Full circuit after modification :...
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40-96 VAC to DC conversion

I am trying to build a simple voltage meter. One that displays the AC voltage onto a small LED display run from an Arduino Micro. I have the nuts and bolts down but I'd like to be able to power the ...
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Custom semiconductor processes with 3rd party foundry

There's foundries with established processes which give you a process kit to simulate things like transistors etc. But suppose someone wanted to develop a custom imaging sensor which requires ...
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2 votes
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74HC74D initial output value after power up

I use a touch sensor (Active Low) to light up a light bulb. here I've used a 74HC74D D flip flop to turn on an off the bulb with the sensor pulse (sensor output is active low which is then converted ...
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TinkerCAD 7-Segment Display Not Showing on Simulation

I am only on my 5th week trying out TinkerCAD for our Logic Circuits course. We are tasked to create a 7-Segment Display Using Logic Gates only. I did all the boolean expressions needed for each ...
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What causes the output of the flip-flop to be LOW in 555 timer monostable circuit?

Before pressing the button, the external capacitor isn't charging because of the short circuit applied across it, but the short circuit is happening because discharge transistor is ON because the \$\...
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Power path sharing with LTC4416

I am struggling with the LTC4416 datasheet. My need is a 4-cell Li-Po battery (13.6..17.2V) used as the device battery and an optional external power supply (18..24V). When the external power is ...
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Chip antenna ANT161575ST-1202A1 layout question

I am designing a GPS module using the following chip antenna: https://product.tdk.com/en/system/files?file=dam/doc/product/rf/rf/antenna/catalog/rf_ant_ant161575st-1202a1_summary_en.pdf The datasheet ...
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14 votes
4 answers
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Does each IC need its own bypass capacitor when there are multiple ICs in the same circuit?

I am working on a circuit to measure the current drain of six hobby servos for a robotics application. I'm aiming to use six ACS712 current sensor ICs. The ACS712 data sheet shows a typical ...
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What does INH as an IC pin label mean?

While using a CAD model for a 74HC4051D multiplexer which I downloaded from SnapEDA I noticed that pin 6 is labelled INH rather than E bar (or Enable) as I anticipated from the datasheet. What does ...
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What is the difference between these two IC suffixes: EUKG and IUKG?

I am wondering what is the difference between these two ICs: LTC3886EUKG-1 LTC3886IUKG-1 I looked at the datasheet and the following page, but I have no clues... https://www.analog.com/en/products/...
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Can a memory controller keep track of which OS application a memory location belongs to? [closed]

I've included a photo of a die belonging to a modern day Intel desktop CPU. It depicts several sections, one of which is described as the memory and IO controller. What I would like to know about the ...
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2 votes
2 answers
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How would you generate a negative rail of -50V with a current of 100mA using a positive 50V generated by a battery powered boost converter? [closed]

Please I really need suggestions on this. I want to generate a -/+50V dual-rail at >=100mA supply for a circuit I am working on. I bought 2 copies of this boost converter module from Amazon and it ...
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