Datasheets are the primary documentation about components, describing their functionality and electrical properties.
-3
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1answer
42 views
Bandwidth (Data rate) of a laser beam when no datasheet exists for the module
I ordered a large number of laser modules that look like the following:
When inspecting mine with a basic multimeter, I noticed a 90 ohm smd resistor is fitted on the module. I see no other ...
0
votes
1answer
40 views
How to find RS485 UART pins are inverted in the data sheet?
I want to know, how we identify the RS485 pins are inverted. I am using at91 microcontroller?
This sam9260 board has four rs485 in which two of them are inverted. ...
0
votes
0answers
18 views
Difference between RGB TN and RGB IPS display?
While I know the pros and cons of each type of screen and how IPS is superior to TN screens in viewing angles and color reproduction I'm trying to understand how these two screens operate differently.
...
0
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0answers
27 views
RFID Key Fob Reader SIEMENS From Car 12 Volt to USB
I'am trying to transform an Rfid reader from Car to usb.
From the wiring Page 77 on Renault-Megane-II-Service-Manual I can identify the power wire 2 and ground wire 4 and I know the reader receive a ...
0
votes
1answer
29 views
Checking my understanding of this datasheet of a TFT LCD display?
I'm trying to modify an HDMI decoder board by Adafruit(https://learn.adafruit.com/adafruit-tfp401-hdmi-slash-dvi-decoder-to-40-pin-ttl-display/downloads) to work with an IPS screen that has a 51 pin ...
0
votes
1answer
38 views
What load can i connect if data sheet is missing output voltage
I am looking at a DC to DC converter data sheet that has an input voltage of 0V-100V. The datasheet only mentions a max output current of 4 amps. Is it safe to assume I can place a load of any voltage ...
2
votes
2answers
819 views
What is this array-like notation of registers in datasheets?
I am reading BMP280 datasheet (pressure&temperature sensor). On different pages they use the following notation:
$$register\text{_}name[a:b]$$ where a, b are integers. For example, on page 13 "...
4
votes
3answers
334 views
ESD ratings of diodes and bipolar transistors
While it's easy to find ESD ratings for ICs (bipolar, CMOS, and any mix) and to some extent for MOS transistors (for the inherent reasons), I don't find ESD rating for many common diodes (left apart ...
0
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1answer
36 views
Power Barrel Connector Voltage Rating Inquiry
My system is using 48V at 3A max. I am currently looking for a power connector to my PCB that can handle my specifications. I came across a potential connector, but I noticed on the data sheet it is ...
2
votes
5answers
163 views
What's the difference between typical and maximum forward voltage for an LED?
The datasheet for some LEDs I'm considering lists the forward voltages as 2.7V typical and 4.2V max. (I'm looking at the "warm white" version.)
In the past, I've only ever looked at the typical ...
0
votes
0answers
29 views
PIC18f46K40 Datasheet/MCC discrepancy
I have found a problem with the PIC18f46K40 datasheet or a problem in MCC - I am using the 44-pin TQFP package.
In the datasheet, the pin layout for the PIC18f46K40 is given below:
The MCC (MPLABX ...
0
votes
1answer
23 views
How to find the actual measurement range of a temperature sensor, HTS221?
I am considering to buy the HTS221 Digital Temperature and Humidity Sensor by STMicroelectronics. The datasheet says the operating temperature of the sensor is from -40°C to 120°C. But on page 33 of ...
2
votes
2answers
52 views
Datasheet part dimensions [duplicate]
I'm trying to draw up a part in EAGLE, but am having a hard time making out the datasheet dimensions:
For example, with the pin width, it's not clear whether it's 0.51 (mm, I presume) or 0.31. ...
0
votes
2answers
52 views
Polarised vs non Polarised Capacitor
Page 18. of http://www.ti.com/lit/ds/symlink/tlv5606.pdf shows a polarised capacitor. In a case like this, does it really matter whether the capacitor is polarised or not, as long as the capacitance ...
0
votes
2answers
38 views
Transistor KSP44 with Ic(max) 300mA can I use it for 150mA
I have some problems to understand the datasheet of the transistor KSP44 (and transistor in general).
I need to control a LED strip. I want to switch it up through a transistor NPN. My transistor ...
0
votes
1answer
42 views
Is it not recommendable to use a spectrum analyzer in its limit frequencies?
Suppose we have a spectrum analyzer whose range of frequencies goes from \$x \ \mathrm{Hz}\$ to \$y \ \mathrm{Hz}\$. Is there any problem that could arise from measuring signals that are near those ...
0
votes
1answer
32 views
Compatibility of an LCD module and a connector
I want to realize i2c communication myself using Raspberry Pi and a LCD module.
I am reading documentations to find an appropriate connector but I am a bit confused and I need help.
Here is the LCD ...
1
vote
1answer
25 views
What information does one need to size inrush current limiting resistors?
I am trying to find a replacement for resistor Vishay CP00021R000JE14, a 1 Ω, 2 W ceramic wirewound (R_MED in the diagram). On startup, this resistor limits the current dumping into 200 µF of ...
0
votes
1answer
53 views
XV0 and V0 - what does it stand for?
I'm looking for suitable GLCD, so far I have found the RX12864H, however the datasheet describes a lot of voltages and I'm bit confused.
While the VSS and VDD are clear to me, I have no clue what do ...
2
votes
0answers
56 views
Are datasheets translated into other languages (e.g., Japanese, Chinese)?
A recent video I saw surveyed Japanese folk on the street and their knowledge of English. The majority of those surveyed had little to zero working knowledge of the language. So that got me thinking - ...
2
votes
4answers
242 views
Total Device vs Total Package Dissipation
For my design I need a bunch of 2222A transistors with each transistor dissipating at maximum ~500mW of power. The transistors come in single packages, dual packages, and quad packages. The datasheet ...
2
votes
1answer
59 views
Mosfet datasheet reading and power calculation problem
Mosfet datasheet: http://www.farnell.com/datasheets/2255289.pdf
Hello, i have few questions about datasheet because they are so confusing. I would like to run 1,5 amps under 12 volts from drain to ...
2
votes
2answers
98 views
ATMEL 24C02 EEPROM - Trouble understanding how the addressing works
I am currently writing a library for ATMEL's 24C series EEPROMs (not a programming question). The library works fine with a single EEPROM at the moment and I am trying to support multiple EEPROMs now, ...
0
votes
1answer
52 views
What defines the sign of transistor rating values?
Here for example I have attached excerpts from two general purpose PNP transistor datasheets. One of them has negative values, other one positive.
I would like to understand what defines these values ...
0
votes
0answers
27 views
How to get datasheet of T118ES LCD driver by terawins?
I bought a cheap CD player that I intend to hack so that I can sneak in a composite signal into it. The part number of the video decoder IC is T118ES as in the image. Even after searching for days all ...
2
votes
2answers
79 views
Is the HP206C really so precise?
I'm looking for barometer sensors for use in Arduino projects. One of the items I consider is the HP206C (at Reichelt, Germany). The vendor contradicts himself a little bit when he mentions 0.1 m and ...
0
votes
2answers
53 views
Thermal parameters for the LM1117
Looking at the datasheet for the LM1117 regulator, on page 18 to 20 there's a table of various layouts for copper cooling planes for the LM1117 in SOT-223 and TO-252 packages. Comparing figures 30 and ...
-1
votes
2answers
78 views
What is the best way to search components
I am a student of Electronic Engineering and right now I am doing my practicing in a company. When I was in the university, I have no problem searching a component, but here in the company needs ...
0
votes
0answers
23 views
What is the maximum output pulse width of this multivibrator?
I have an IC which is this multivibrator. And it is the model CD74HC123EE.
But I actually noticed on the receipt there was an indication as "short".
I also saw two folders in a folder called ...
1
vote
1answer
33 views
Is this voltage rating relative to ground or differential?
A transducer has this datasheet.
What is meant by Bu,g?
The amplifier I use applies +10V and -10V to excitation terminals so the difference between the terminals will be 20V and the excitation ...
1
vote
2answers
49 views
Can I guess the Rds(on) at 3.3 V from this MOSFET datasheet?
I ordered some MOSFET switch modules. Because they were advertised as "for Arduino" and "Voltage: 3.3V, 5V", I assumed they had chosen a decent MOSFET for the job (like the IRLU7843 or at least the ...
0
votes
2answers
47 views
How to read flag register in datasheet?
I'm having troubles deciphering the datasheet for the DS3231 RTC. The below table shows that 0x02 bit 6 is the flag to operate in 12- or 24-hour mode. But which one correspond to the bit being low or ...
0
votes
1answer
42 views
Resistor for solid state relay (CPC1008N)
I have solid state relay (CPC1008N) Dataheet here. What is the resistor I need to use to connect it to a power supply with an output voltage of 4.5 volts?
1
vote
0answers
24 views
Vishay Dale CZB series: understanding the datasheet pinout (pi attenuator)
Here is the datasheet for the CZB series. I'm not inlining it because the problem is that I don't understand if the datasheet even explains what I'm trying to gather, that is, if R1 needs to be in ...
1
vote
1answer
58 views
Understanding IC max current in Datasheets
I'm hoping someone can help a noob out here. I've been reading a lot of data sheets of late looking for chips that will work for a small project. In short I need to drive a number of outputs (mainly ...
0
votes
1answer
38 views
SMD-Potentiometer question about Datasheet
I am a bit confused about this Potentiometer-Datasheet.
http://www.bourns.com/docs/Product-Datasheets/PVG3.pdf
Am I right, that the resistance-range is only +-20% of the resistor value? For example,...
0
votes
0answers
26 views
How to convert Ripple Current spec to ESR?
It used to be that vendors like Digikey gave a cap's ESR value and not ripple current. Nowadays, it seems more report only ripple current and not ESR. What gives with that?
So what are we supposed to ...
0
votes
2answers
25 views
How to select correct Tpd values to use from Datasheet?
I'm trying to work out worst-case propagation delays for an address-decode circuit I'm designing. I'm looking at the datasheet for a 74HC00N, and I'm confused by the propagation delay (tpd) values on ...
1
vote
1answer
77 views
Reading transformer datasheet
Never though transformers would be so confusing to many - I found about a dozen similar questions here. Adding mine to the pile.
Here are the datasheets for 3 transformers: 750313975, 750313445 and ...
0
votes
1answer
37 views
How do the pins of this analogue switch correspond in this diagram?
Regarding an answer of my previous question, I want to use the following topology:
When the input is below the threshold, the comparator output is HIGH and the Analogue switch above outputs the set ...
0
votes
0answers
66 views
correct use of MAX3232 for a single TTL to RS232 connection
I am using the MAX3232 chip for doing TTL to RS232 conversion. Datasheet available here:
http://www.ti.com/lit/ds/symlink/max3232.pdf
The chip is dual channel, but I only need to use one channel. I ...
1
vote
0answers
21 views
How does the PT2264 determine how many address pins are in use?
So, I'm looking into making a little device which uses an 433MHz transmitter and a PT2264 or LP801B.
While reading the datasheet for the PT2264, I'm a little confused on how it is determined, how ...
1
vote
2answers
71 views
Datasheet / footprint for this weird USB-C connector?
I've got this SMD USB-C type connector I want to use:
It has a single row of 12 pins along the back, presumably meaning the other 12 USB C pins are pre-connected internally. Neat. This also suggests ...
0
votes
1answer
81 views
What is does a resolution of “11.8 bits” mean when looking at a digital signal?
I recently picked up a project at work involving a magnetic sensor. When reading the data sheet, it lists a range of resolutions from 11-bit to 12.8 bits, 11.8 bits being nominal. I can understand ...
0
votes
1answer
90 views
RN4020 BLE module authentication without I/O Capabilities and mysterious datasheet
I'm trying to activate authentication for my RN4020 Bluetooth module in a way I dont have to enter PIN or Passcode during this process because my RN4020 wont have any displays or keyboards where to ...
0
votes
1answer
67 views
SD Card pins dimensions
I am trying to create an SD card from a PCB. My problem is that I cannot find the SD card specification that would give the:
Dimensions of each Pin
Placement of each Pin
All specifications I could ...
0
votes
1answer
22 views
MCP1702 5v: Can work with 6V input and get 5V
I'm reading the datasheet of the MCP1702.
At page 4 (http://ww1.microchip.com/downloads/en/DeviceDoc/22008E.pdf) it says
...
0
votes
1answer
42 views
How to read data sheet to get the time diagram of the outputs
I would like to know how one can read and obtain the outputs for Qa, Qb, Qc, Qd, using this data.
On the third line of the truth table, what does it mean when the outputs for Qa is a, Qb is b etc ? ...
0
votes
2answers
79 views
BA3121: Ground loop supression is great however very thin audio quality
Recently I bought a couple of BA3121s to fight the annoying ground loop problems when using several/separated modules (MCUs, BlueTooth, USB etc) in class-d amplifier audio projects and all the modules ...
0
votes
1answer
69 views
Atmega4809 Asynchronous USART doesn't trigger data register empty interrupt - iom4809.h error
TLDR ATmega4809, mis-labelled ISR in iom4809.h. How can I define an ISR without using these mis-labelled predefined values from iom4809?
Using the ATmega4809 Xplained Pro eval board, I'm setting up ...
