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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52 views

Integrated-circuit identification

I need help identifying two SMD parts. One says (1G5) and the other says (1P) they each have six pins.
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43 views

Relationship between TTL and CMOS [on hold]

What is the relationship between TTL and CMOS in terms of system configuration.
0
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0answers
23 views

movement decision taken upon the light seen by a line follower robot

I'm working on a line follower robot and it has to check traffic lights every estimated distance and a decision of whether to move or wait is to be taken upon the current state's light of an external ...
2
votes
1answer
67 views

Where can I find an ic at home relevant to my project?

I am fairly new to electronics but I have a decent understanding of how basic components work. I want to start building my own audio equipment as fun projects and for actual use in my home studio ...
0
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1answer
70 views

Need help identifying an integrated circuit

Pulled from a large tube TV, this one is a real head scratcher. I think it's an RCA chip but all RCA chips I've see use a different part naming scheme (for example ...
0
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1answer
50 views

ASIC Power supply requirements

I am a newbie in ASIC design process and have a question. What is difference (or pros and cons) of shorting the voltage supply pins(which have the same voltage requirements) in package level or in ...
0
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0answers
11 views

HDB3 encoder/decoder IC [closed]

Does anyone know of HDB3 encoder/decoder IC's, possibly with on-chip clock recovery? CD22103, HDB3 transcoder, is obsolete. MV1442 seems to be hard to find. Thanks!
0
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1answer
79 views

How are microcontrollers designed? [closed]

I've always wondered the steps involved in designing a microcontroller. Let's say one wanted to design a dedicated motion control chip, would this be "hard wired" into the chip? What kind of software ...
52
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7answers
3k views

Why is my circuit so incredibly sensitive to electric fluctuation?

I recently finished building a circuit showcased in a beginner’s electronics book. I have included the picture of my creation below because I think it may become relevant to the question. At the ...
0
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1answer
54 views

How does an open-collector gate work by using resistors?

I understand that that the purpose is to drive multiple signals to a wire bi-directionally. The two logic states are either 0 or flow (high-impedance). However, how do resistors come into play for the ...
6
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1answer
179 views

Trouble getting 555 timer IC circuit to work properly (Make Electronics Book Experiment 18)

I am currently reading a book titled “Make: Electronics”. This is an electronics book whose target audience is supposed to be complete beginners. One of the book exercises (Experiment 18) includes a ...
0
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2answers
31 views

Pad and soldermask dimensions in PCB design

I found that usually on BGA package and on a lot of QFN datasheets are provided IC and PAD-IC dimensions and not advised PCB-PAD dimensions and soldermask dimensions. Can someone tell me a good rule ...
-1
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0answers
37 views

How to read an ICC? [closed]

I am trying to read an ICC. It look like a SIM card, but it by itself. I mean there is no plastic around it, it just the chip itself. Is there a way to read the information that is stored on it? If ...
0
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0answers
63 views

Who has manufactured this IC?

This is a RF receiver IC from a cheap Chinese radio controlled toy. I am not able to figure out whose logo this is.
0
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0answers
26 views

Send unique ID when powered (low-power)

I'm looking for a simple chip that simply sends its unique ID(eg.: number) when it powered. Thus it uses iPhone's line-out plug, I only have less than 1.5V. (Or 0.894V, I checked on Wikipedia, but I ...
0
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0answers
24 views

Bootstrap capacitor selection considering parasitic current

I have been trying to determine how to calculate a bootstrap capacitor value for a synchronous gate driver IC implemented for a buck converter. I understand the the demand of the MOSFET gate itself ...
1
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1answer
29 views

Shift registers, understanding parallel-in serial-out

I have the 74hc597 parallel-in serial-out (PISO) shift register. The datasheet can be found here. I have a general idea about how serial-in shift registers (SIPO) work, but I'm having trouble ...
0
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0answers
65 views

A general purpose 16-bit shift register

I cannot seem to locate a general purpose 16-bit serial-in parallel-out shift register that is still being made. Although there are plenty of LED drivers that can adapted for the purpose. All I need ...
0
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1answer
78 views

Circuit help. I want a Voltage gain from 5 volts to 10 volts.

I need some circuit help.. I am trying to boost my voltage from a 5v source to a 10v output so I want a Gain of 2. I Ran the simulation and built the circuit exactly how it is shown in the figure ...
0
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0answers
35 views

AN-101 IC obsolete ? No description or design available

I have some of these ICs lying around over a decade, received as surplus from somebody. They are marked 'PROCON AN-101' Despite detailed search on internet, can not find pinout, description or any ...
0
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1answer
54 views

How do I design 5-to-32 decoder using 2-to-4 decoder?

As there are 32 outputs in 5-to-32 decoder so I will have to use 32/4 = 8, 2-to-4 decoder. But then I have total 16 inputs. As I want to create 5-to-32 decoder so I need only 5 inputs, what do I do ...
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1answer
40 views

Why is Leakage Current Important when a MOSFET switch is “ON?”

Referencing ADG5206. ADI has specs for Drainage Current at the Source and Drain when the switch is OFF. They also have channel leakage for Source and Drain when the switch is ON. Why is it important ...
0
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3answers
55 views

PCB Integrated Chip Question

Hi I am building a PCB using eagle and its the first time I am using an IC. Two questions arose. Do I need to connect the IC chip's ground, because eagle did not do it? Do I need to make sure all ...
0
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1answer
54 views

Can you implement WLAN on a ZigBee chip?

I've spent my afternoon browsing around the web looking for a microcontroller that has integrated WLAN (802.11), but I haven't managed to find any on the market. There are lots of cheap ...
0
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1answer
62 views

why there is no quad 1-to-4 demultiplexer?

I have 4 input signals to route on 4x4 outputs. it's not a 1-to-16 demux what i'm looking for. Outputs must be selected 4 by 4. is there any demultiplexer that can do that on one IC ? I didn't find ...
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0answers
34 views

How to categorize a part based on pin names? [closed]

Let's say I have an IC chip - a microcontroller or a microprocessor - and its corresponding pinout information. I would like to be able to categorize or 'tag' this part's type / functionality / ...
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2answers
40 views

Memory design with 4 256K X 1 Bit IC's to a Z80

I have a couple of memory IC's lying around (16 of them) which I would like to use in my homebrew Z80 project. These IC's were produced by Samsung in 1988, the KM41256A 256K x 1 bit. I realise I can't ...
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2answers
89 views

How do we model the behaviour of circuits on ultrashort time scales (< ns)?

The electric field has a finite propagation speed. How do we describe the behaviour of circuits on timescales before even changes in the electric field have reached the entire circuit? Is this is a ...
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1answer
41 views

IC to replace 4 FETs (switches)?

I have 4 data lines that I want to put to high-Z if a pin (let's call it EN_OUT) is high (or low, if necessary), otherwise connect through. I've successfully done that by putting an N-FET on each ...
0
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1answer
82 views

Unknown “268” DIP-14 IC

I have been going through a container of old electronics and discovered a set of ten DIP-14 ICs labelled "268." I have searched this number as well as the additional unique number on each chip, but ...
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0answers
23 views

Help identifying this IC? 0681, V04, FM279U01

Can anyone help identify it? As far as I can tell, the markings are 0681 on both sides of the die, then in the middle it has V04, and at the bottom it has FM279U01.
0
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0answers
32 views

LTC3111 - VIN short to GND

I'm using the LTC3111. I have followed the typical application on page 1 of datasheet. I'm operating in burst mode and no load current is drawn. When I power up the IC, the output Vout (pin 12 of MSOP ...
0
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1answer
59 views

How do I calculate voltage on a multi-powered DC circuit where all ends go to ground?

I'm writing software that will calculate the correct voltage on each component, given the state that the DC system is currently in (ex. what power sources are on, what relays are open, fuses popped, ...
2
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1answer
52 views

Triangulation with Single Tone FM TX and Three RX using Phase Detection [closed]

I'm looking for some IC and frequency suggestions to accomplish the following task. Modulate a tone onto a carrier and continuously broadcast this signal toward an array of three receiving ...
1
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1answer
60 views

Can I get help with measuring particle charge using oscilloscope?

How can one measure particle charge using oscilloscope and op amp integrator circuit along with a capacitor and faraday cup. I am unable to figure out how to approach. I have the circuit ready but ...
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3answers
58 views

DIL Chip information required

I have a "Delay Timer Switch, with delay adjustable from 0 to 10 seconds". It operates from 12V. Can anybody tell me that what is this part in this PCB? I guess it is DIL chip (I am a beginner and ...
0
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1answer
58 views

Having to double press a tact switch?

I have created a simple circuit consisting of a 4017 ic, a tact switch, and arduino. The arduino is just for debouncing purposes. For some reason i have to double press the switch for the input to go ...
0
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1answer
47 views

Safely removing bonding glue from an IC in order to identify it?

I have an IC, that has 5 visible bonds. The entire IC is covered with some sort of semi transparent bonding glue. I want to identify the IC and were thinking to remove the glue somehow. What chemical ...
0
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1answer
59 views

What is the correct name for this chip? And how to read it?

I seen this type of chip on credit cards and various other electronics like printers. What is it called in the electronics field? Is there a specific protocol on how to read and write to it? Is there ...
0
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1answer
34 views

Understanding of UC384n

Can you explain schematic of IC UC3842/5? First of all here general schematic: What I can't understand is lower left corner and pins number 2(VFB), 1(COMP) and 3(CURRENT SENSE). What I understand ...
0
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1answer
46 views

What do I need A0 in a USB Controller (PDIUSBD12)?

I'm reading the datasheet of the USB controller PIDUSBD12, but I can't understand what the goal of the A0 pin. In the controller there is a data bus (D0-7) and this A0 pin, the datasheet says that ...
0
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0answers
28 views

CD4029 sequential up/down counter

I had a circuit (but have lost it) that used cascaded CD4029 chips that counted clock pulses to 17 and stopped. Then if the down pin was enabled it counted down to zero and stopped. A different ...
0
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1answer
32 views

DDR2 data rate and data bus confusion

I am reading on DDR2 memory from past few days and have got confused with some of the terms involved. I am mainly confused from discrete memory (single DDR2 memory IC) rather than DIMM module which ...
0
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0answers
15 views

full inverter circuit with a buzzer circuit [duplicate]

I analysis the Lm324 circuit and i understand how it work without the C9 and C11 , but I want to know what the function of these tow capacitors.
0
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1answer
46 views

How can a transistor be made smaller without changing the electric field?

Every time they introduce a new process node with reduced feature size, they tend to reduce the core voltage. The reason why is that the reduced size results in larger electric fields if they do not ...
1
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2answers
121 views

IC pins too small for my breadboard

I recently bought some IC's with 8 and 16 pins. I was used to work with bigger ones, so now I cant test them in the breadboard without soldering an individual wire to each pin (which would probably ...
1
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1answer
16 views

Chip with one oscillator provide different brightness (PWM) for multiple LEDs?

I'm working with the PCA9531 chip described as The PCA9531 is an 8-bit I2C-bus and SMBus I/O expander optimized for dimming LEDs in 256 discrete steps It is a chip that provides 8 PWM outputs ...
3
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3answers
501 views

How do integrated circuit design companies create their datasheets?

Especially for something like a microprocessor. I assume the majority of information is "auto-generated" or we'd see a lot more typos and errors. A laughable scenario keeps popping into my head ...
1
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1answer
35 views

Substrate design in MOS ICs

In CMOS technology, why does the substrate always have to be p doped? When we need a p-channel MOSFET, we generally create an n-well into it and create p source and drain regions. Why does the balance ...
0
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1answer
56 views

The Use and reason for High K materials

I am new to advanced integrated circuits as it is my first course on the subject and there was a discussion about geometrical scaling in the seminar. The discussion proceeded with the fact that ...