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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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IC Identification - TT617-18-1

Does anyone have any ideas what this chip is please? Tried searching but to no avail. (I think the chip Identifier is the TT617-18-1). Thanks in advance.
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Using less than 10 LEDs on LM3914

The LM3914 IC has a divider that works over 10 LEDs. Does this IC enable using less than 10 leds and does it automatically adjust the scale based on the number of LEDs (eg 5)?
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Help Identifying a chip from a schlage handkey board

Im trying to repair a schlage handkey which wont boot. I looked at the main board and noticed the chip below. The chip above it is the same part number but when I try to look it up I get nothing. How ...
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32 views

Rise time different from fall time; relationship differs between AND and XOR gates

I'm looking over the results from a lab I did in an introductory electronics class, and found something I'm unable to explain. We measured the rise and fall times for two logic gates in this absolute ...
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29 views

Reprogram Printer Chip [closed]

Can anyone point me in the direction to reprogramming a printer chip, specifically the Lexmark 80C1HK0 reset chip for the CX310dn laser printer. You can search that for an image of the circuit board. ...
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1answer
49 views

How does soft start work in TI buck regulators?

I am planning to use "TPS54341" in my design. I am curious about how the soft start circuit internally works in TI regulators. The datasheet explains to how to use it, however, does not go in much ...
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3answers
85 views

Is there a 74HCT03 equivalent I can just replace “as is” [on hold]

Is there a 74HCT03 equivalent I can just replace "as is"? Of course, it will be better to buy the same exact chip reference but is it always the case? Many chips are equivalents pin-to-pin, right? ...
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94 views

Need to identify this chip on camera lens mainboard

I need to identify this chip in order to replace on an expensive camera lens. The code TF1 and TF2 are printed on the board to signify the issue is with the focus motor control. The core is 1mm thick ...
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16 views

Integrated circuit for phase power measurement of PWM driven motor [closed]

I'm trying to find an integrated circuit to measure power on at least one phase of a PWM driven syncronous or asyncronous motor. I've found plenty of chips that do this kind of job for 50-60Hz ...
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38 views

What is the common feature sizes of SSI and MSI ICs

I noted recently that for SSI (small scale integration) and MSI (medium scale integration) ICs I have never found feature size specified in their data sheets. When it is about microprocessor/...
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20 views

AFBR-5803 optical transceiver SD output

I want to connect AFBR-5803 optical transceiver SD output to PCA9535 IC; it's an IO Extender with CMOS voltage levels according to datasheet: Vih_min=2.31V Vil_max=0.99V But I'm a little bit ...
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2answers
52 views

Will this SOI circuit be grounded?

Upfront, I apologize if this may be a terribly obvious question. I don't have all of the background to understand it confidently. I'm trying to apply a voltage for an electrophoresis experiment ...
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2answers
223 views

Rough estimation of power consumption in an electronic design [closed]

I want to get a rough estimation of the power that my design is going to need. Is it sane to calculate the power of every IC component based on values in DC Characteristics in the corresponding ...
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54 views

Identify unknown component

I opened up the sharp optical dust sensor "GP2Y1010AU0F", and below is the board for driving the IRED (right arrow, AHR31) and I believe amplifying the photodiode signal (left arrow, 16 legs S 126 444 ...
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50 views

Does tools for automation analysis image IC for extract netlist exist? [closed]

Does tools for automation analysis image decapsulated IC for extract netlist exist ?
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37 views

Digital Integrated Circuit layouts with Magic transfering to sue schematic

I am working on a assignment using a editor software to design layouts with called Magic and a schematic diagram editor software called sue. For the assignment the problem is to take a existing .mag ...
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4answers
120 views

Integrated chips

Ive heard that an integrated chips contains transistors, capacitors and resistors. However, can resistors or capacitors get that small to be placed on a silicon chips? Or is it just the arrangement of ...
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How to convert MIPI DSI to Parallel RGB888 [duplicate]

I am using the Qualcomm Snapdragon 410E and want to interface a parallel RGB888 display to it (24 bit parallel interface). The Snapdragon only has a MIPI DSI interface, so I need to find some way to ...
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22 views

Cadence Virtuoso - Cell Parameterized [closed]

Please see attached. I am unable to view the Poly, Metal, Cont layers for the PMOS & NMOS instances. Need a bit of assitance on how to fix this issue
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1answer
73 views

Find the best components and ICs [closed]

How do a newbie find the best components ? is there site or something ? the part number is not exactly user friendly. I know there are the classics, that I suppose improve over the years, but there ...
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28 views

PMOS as a pass gate in SRAM

Can anyone explain why replacing the NMOS pass gate in SRAMs with PMOS would be a bad idea from a circuit perspective? Fast responses would be appreciated. Thank you!
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1answer
52 views

Two capacitors of same value connected in series and connected to power supply instead of one capacitor of equivalent value for PCB design

what's the purpose of two capacitors of same value connected in series and connected to power supply instead of one capacitor of equivalent value for PCB design especially for Automotive applications
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28 views

Using ground plane for bypass capacitor and package size

I'm working on a breadboard debouncing PCB and starting going down the rabbit hole of bypass caps. Here's my layout and the debouncing ICs recommended layout (found here on the datasheet): Here's my ...
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1answer
39 views

Debouncing IC input resistor?

I've recently been working on a breadboard compatible compact debouncing PCB. I found the MAX6816, a debouncing IC - check the spreadsheet here. I made the below simple circuit as per the "Typical ...
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1answer
42 views

LT1308A - High Voltage Modification

I am trying to understand how to modify the circuit below to output ~180V at 4mA minimum for a multiplexed nixie design. LT1308A Datasheet - Circuit on Page 17​ Voltage: The 1:12 transformer is ...
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1answer
67 views

Why doesn't my bench PSU read current on a breadboard?

I've recently purchased a cheap eBay DPS3012 DC-DC converter supply. I intend to use it on breadboard projects. The "problem" is that the meter reads a 5V output, with no current being drawn and ...
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119 views

How are PWM IC's able to provide so many features in small footprints ? [closed]

If you look at the general pwm IC's for standard topologies (buck, boost etch) , they have tons of protection features such UVLO, overvoltage, cycle-cycle protection and overcurrent protection. They ...
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118 views

What are IC made of?

Is that black material made of silicon? What about the red, green, yellow material? What about the blue material?
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43 views

N-channel MOSFET switch circuit with long tailed pairs doesn't seem to work?

I am trying to build a circuit that will integrate some charge from a some test input (TEST-IN) only when a switch is on. In order to mitigate charge injection from the MOSFET I was going to use long-...
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1answer
63 views

PCB Power Pad destroyed for TPS51125. Fixable?

While trying to fix a laptop, I was de-soldering a TPS51125. I added a bit too much solder to the power pad while wicking so I had the "smart" idea to use a solder pump to remove it... but the pad ...
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0answers
108 views

Howcome there is current flowing through the gate of this transistor?

I have a few conceptual questions: If there wasn't Rg (Resistor between gate and drain), would Vin = Vout then? For small signal analysis, current can flow through the gate (AC) if there's a voltage ...
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3answers
822 views

What's the formal process to determine the IC by manufacturer code?

I've curious if there's an industry standard method used to determine the IC on a board. Specifically, I've been wondering as I have an IC that I want to replace that seems to have failed, but there'...
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2answers
92 views

Resistor or no resistor between this IC and the pmos GATE?

I'm using this IC (https://www2.mouser.com/datasheet/2/609/ADM1270-878589.pdf). This IC controls the GATE of a pmos. I'm thinking about using this MOSFET (https://www2.mouser.com/datasheet/2/389/...
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1answer
24 views

Data Shift problem for Q6 & Q7 (starting from Q0) while using the 4094 I.C with a Micro-controller

Currently I am using a PIC micro-controller with a 4094 IC but when I WANT to shift data to Q6 or Q7 it shifts it on Q0 & Q1 and when I shift it to Q0 & Q1 it turns on Q6 & Q7. So I do not ...
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1answer
87 views

Is there any problem with these TSL201R IC's?

I ordered two TSL201R DIP-8 on a chinese website, which I thought should look like this : However, I received these two guys : As hobbyist I've never seen this kind of IC's before, so is it a kind ...
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1answer
65 views

Measuring change in magnitude of electric current due to change in conducting material characteristics

I posted this in the physics section. I now think this might be more appropriate section for these questions. I am looking for answers to the following: What is the order of magnitude of change in ...
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114 views

Using ICL8038 as a VCO

I wanted to use this function generator IC as a voltage controlled frequency output especially to obtain low frequency sine waves. But unlike many implementations, I wanted to control the frequency ...
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1answer
73 views

Increased current consumption of micro-power devices

I've been working with microwatt and nanowatt power consumption devices for a while and I've mentioned that sometimes, due to unknown reason, current consumption increases in order of magnitude. ...
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3answers
83 views

What's the first pin of OPA2365?

Usually I recognize the first pin of an IC by observing the small circle and then comparing it with the layout in the datasheet, but in the OPA2365 there is no circle. In the image, is the red arrow ...
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64 views

Using 1 74LS377 instead of 2 74LS173, how do I keep the CLEAR function?

I am currently following a online project guide for an 8bit breadboard computer. https://eater.net/8bit/parts I was up to the stage of sources parts when I found it difficult to find 2 74LS173 IC's (...
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2answers
104 views

Can you cascade the transistors in ULN2003?

As the title say, can you cascade the transistor pair in ULN2003? The datasheet of the IC say it has a max output current of 500 mA, but I need 1 A. So is it possible? (if you know any other ...
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2answers
147 views

How are integrated circuit photomasks fabricated with such high resolution?

I understand that photomasks / photoreticles are used for the fabrication of integrated circuits, CPUs, and such. I also have read that CAD software and languages like VHDL are used to describe the ...
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1answer
66 views

repairing damage: what size ceramic bypass capacitor

Repairing a motor control board from a washing machine. A 1206 ceramic cap was burned up, there's a bulk electrolytic in parallel, rated 200v 1000uF. I've attached the example schematic for the ic (...
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1answer
108 views

Component identfication for IC marked C50 23XH

The letters on the chip are: C50 23XH What is the producer of this chip? What is this IC?
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2answers
2k views

Parallel RAM without large number of pins?

Back in the 1970s, Texas Instruments had a now-discontinued range of products that they called GRAM (and read only equivalent GROM) which was basically a standard memory chip with address and data all ...
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1answer
53 views

Logic circuit shutting off at target voltage

I deleted the old question and posted another one because I felt the question is now substantially different. I have a potentiometer connected to a current source and I want the logic chip to cut off ...
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2answers
34 views

Measuring floating gate potential with minimal leakage current

I am working on a sensing device where the voltage of a floating node is dependent on the quantity to be sensed, as well as the net charge stored in the node. I would like the device to be only ...
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1answer
45 views

What kind of PMIC is this?

I found this circuit in a schematic I'm reviewing, which supposedly provides a regulated +5 V supply. The primary side of the transformer includes a flyback controller that switches ~340 VDC on the ...
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1answer
69 views

LEDs to indicate Data being transferred

just asking for some reassurance really, probably a novice question. Thank you in advance for any advice. I am building this project: https://github.com/brianmarkpeters/CHIP_BASED_SYNTHESIZERS/tree/...