Questions tagged [datasheet]
Datasheets are the primary documentation about components, describing their functionality and electrical properties.
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1answer
47 views
(Backlight) LED Driver maximum number of LEDs
I've been tasked to find a suitable backlight led driver for a Mitsubishi LCD panel (AA104XF12-cf1) which is PWM dimmable, but in my search I've only found confusion.
In nearly all datasheets it ...
7
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1answer
141 views
Why such specific resistances in the TL431 datasheet examples?
I was looking over the TL431 datasheet, and a few examples, particularly figures 33 and 34 (page 28) in there use what seems to me like needlessly specific values for resistors. I've attached an image ...
10
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2answers
1k views
What is meant by “zerø-crossover” in the OPAx365 datasheet? And why the “ø”?
TI's OPAx365 seems to be a fairly ordinary op-amp after you dig through all the marketing buzzwords. But one thing sticks out: the datasheet repeatedly mentions having a "zerø-crossover" topology.
I ...
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0answers
40 views
Components Naming [on hold]
I was wondering what is the rule behind naming the components, and why there are names/numbers that are close to others while having really different functions.
For instance, in logic circuits, the ...
6
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2answers
755 views
How to interpret op amp minimum supply voltage if the datasheet field is blank?
I'm trying to find the minimum supply voltage for the LF356N op amp. In the "LF35x" line from the datasheet below, that field is left blank. Same goes for the Absolute Max Ratings (not shown here).
I'...
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1answer
65 views
Interpreting USB-C land pattern
I'm replacing USB Micro and USB B connectors on my PCBs for USB-C connectors, but only using USB 2.0.
So I'm looking for a connector that isn't too complex to layout or hard to solder. I found this ...
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3answers
141 views
Help understanding IC's datasheet
Apologies if this is really obvious, but I'm struggling to understand the datasheet of the FL5150MX IC.
I think my confusion may stem from the integrated shunt regulator.
Under the 'Recommend ...
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2answers
84 views
What is the point of 2 inverters in series? [duplicate]
In the datasheet for the Nexperia HEF4543B, in the logic diagram, there are 2 inverters in series:
What is the point of these inverters in series?
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1answer
21 views
Maximum Vin on load switch ICs
I'm trying to determine whether the absolute maximum rating for Vin on load switch ICs applies for when the switch is both open and closed.
When the switch is closed, it makes absolute sense to me ...
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0answers
32 views
How does a slave PIC 8259 gets enabled via CS
I was trying to wrap my head around the interfacing between 8086 and 8259 PICs. Specifically, the Chip Selection and I/O port mapping.
According to a diagram I saw here, the 8086's address lines A0, ...
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2answers
53 views
How do I decide which which oscillation frequency and capacitors to use with a boost converter?
I'm working on a few projects where I'll be driving about 8 WS2812B LEDs on a 5V rail with an ATTiny85 (I think the whole circuit is going to draw about .5A; I'm using .75A for my calculations). I'm ...
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1answer
48 views
Comprehending wiring data sheet for ME3 C2H4 gas sensor
I am humbly requesting an English translation of this image. The only thing I figured out is that the box on the top left is the ME3 sensor I am trying to connect to an Arduino. It has three pins, as ...
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1answer
33 views
How do I determine the capacitor to use when converting current to voltage?
I'm trying to figure out how to use an ALS-PT19-315C/L177/TR8 phototransistor (or something like it).
The datasheet has this sample circuit for converting current to voltage so that I can measure it ...
2
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1answer
99 views
Why do semiconductor companies not provide their datasheets publicly? [closed]
Some semiconductor companies such as Broadcom and Microsemi do not publish the datasheets of some of their chips such as networking ones. It seems the companies do not provide the datasheets without ...
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2answers
71 views
Is my understanding of this level shifter correct?
I am considering using this TI LSF0102 level shifter in my circuit - but would like to understand, based upon its datasheet, if I have my understanding correct.
My aim is to be able to supply 3.3V ...
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0answers
15 views
Mosfet parameters from Datasheet
Is it possible to find out the W/L ratio and process transconductance parameters of a mosfet from it's datasheet when it is not directly given ? If yes, how ?
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1answer
39 views
Rechargeable battery datasheet
Some parameters on the datasheet are a little bit confusing. What does the datasheet mean?
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2answers
68 views
Help understanding power ratings in optocoupler datasheet
I want to understand this the datasheet for the Everlight EL817 optocoupler but don't know what is the maximum power can the output hold.
I see an optocoupler as a kind of switch that closes a ...
1
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1answer
92 views
Actual Accuracy of an ADC
I checked quite some ADC datasheets and am a bit confused regarding the actual achievable accuracy of an ADC.
Let's take this ADC for this example (ADC MCP3422):
http://ww1.microchip.com/downloads/en/...
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0answers
32 views
LCD 18 (6 x3 ) Pinout without Datasheet AW -60i LCM V4.1
I have this (18 X 3) LCD Pins, I need help to find the Datasheet or the pinout for it.
AW -60i LCM V4.1
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2answers
75 views
Confusion with Applications section of components
Im recommended to install a 10000uF Aluminium Electrolytic capacitor for a 72 DC-link of an inverter for regenerative purpose. When it comes to details, one manufacturer mentions "inverter" in ...
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0answers
18 views
Position sensor PS732 feinmetall
I'm redesigning a board in order to use this sensor datasheet. After reading the datasheet I have missed the potentiometer principle from third picture where this can be seen:
You can see how Rp is ...
0
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1answer
30 views
Doubt regarding dual channel MOSFET datasheet
I came across a dual channel MOSFET link for dual channel MOSFET
But I am confused about the drain current of 0.63A. Do they mean drain current of each channel is 0.63A or for both channels combined?
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1answer
66 views
Embedded System power requirement calculation
How can I measure total power requirement of an embedded system which consists of a lpc2138 interfaced with various other components such as lcd, humidity sensors and temperature sensors. Also the ...
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2answers
68 views
MSP430 Baud Rate Generation: Datasheet Discrepancy
My project is based around the MSP430F5529. From the MSP430x5xx family user guide:
NOTE: Baud-rate settings quick set up
To calculate the correct the correct settings for the baud-rate ...
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3answers
1k views
What is the “maximum power” of an antenna?
I was reading the datasheet of an antenna and I came across the parameter "Max. Power (total)", measured in Watts. What does this stand for? Can it be measured to check that the datasheet is right?
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1answer
36 views
Help with two input specs of a DC-DC converter
Regarding this DC-DC converter datasheet the input specs are given as:
Mine is 12V to 5V DC and called MV 1205S. So my input voltage is regulated 12V DC.
I have couple of issues with this part:
I ...
3
votes
2answers
180 views
How to understand an ultrasonic sensor datasheet?
I'm trying to model the ultrasonic sensor for a simulation and I need to somehow express in what angles and distances the object will be detected by the sensor.
What does sensitivity mean? It is set ...
0
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2answers
63 views
Is this relay datasheet incorrect? (Omron G6SK-2)
I'm using Omron G6 series relays, both the non-latching (G6S-2) and and dual coil latching (G6SK-2) for a few PCB designs.
What I didn't know was that some models of relays give their connection ...
0
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1answer
29 views
NTE 4050 buffer and current sourcing capability, datasheet reading woes
I am trying to construct an output that is switched on by the inputs to a buffer. The buffer input, in the final design, will be sourced from an Arduino or Raspberry PI. I needed the buffer because ...
0
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0answers
40 views
Microchip MRF24WN0MB datasheet for use in STM32
We have designed a board where a Microchip MRF24WN0MB WiFi is connected to an STM32L082 ARM micro-controller through SPI.
I can generate code with STM32CubeMX (compiled with Eclipse SW4STM32) and run ...
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2answers
65 views
What is “Vop” sensitivity unit?
I am studying the datasheet of an ultrasonic transducer (Murata MA58MF14). I understand the maximum input voltage unit (voltage peak-to-peak), but I do not understand what exactly the sensitivity unit ...
2
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3answers
55 views
Which relation in the data-sheet shows the frequency vs gain relation explicitly?
This opamp output starts getting distorted at around 10kHz and the amplitude halves around 25kHz.
Where in the data-sheet shows the relationship between the frequency ant the attenuation? Something ...
0
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2answers
51 views
Maximum Clock Input Frequency Datasheet Confusion
I was looking for an 8-bit parallel to serial shift register to use in a project I am making. Initially, I thought that the 4021 would work perfectly for what I need, however, after looking at the ...
0
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1answer
47 views
What is the receiver component in Snap Circuits part U24 (Infrared Receiver)?
I'm trying to find a datasheet for the receiver component in Snap Circuits part U24, which is an infrared light detector/receiver. It looks exactly like a TSOP382 sensor (picture below) but doesn't ...
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2answers
84 views
PS/2 mouse / keyboard interface info and classification
My hardware interfaces teacher in the university gave a task to find info about PS/2 interface and fit it into a classification by answering a list of questions. Here's what I've found:
Which type ...
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4answers
70 views
How to find max load limit in datasheet?
I have а datasheet but I don't understand: how to find max load limit in datasheet?
Can I use this SSR to switch the load (12V DC), and what current can I count on?
Thanks.
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2answers
77 views
Contradictory information in LM339 datasheet
I am inspecting the LM339 datasheet (link) and I find contradictory information regarding the operation principle.
Page 10 states:
The output consists of an open-drain NPN (pulldown or low-side) ...
2
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2answers
80 views
Understanding transformer datasheets
I came across this transformer, and there are a few points of the datasheet that seem unclear to me. I can't seem to find any references for what exactly they refer to, so I'll ask here:
Where the ...
0
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1answer
59 views
Proper connection of choke coil in ethernet magnetics
I need to use the medical ethernet magnetics by Pulse HXU6200NL (it is the only 2MOPP medical-certified PoE magnetics I can find). These are of the rather common transformer/choke coil topology. My ...
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0answers
59 views
Powering ILI9341 LCD from MCU IO pin
Looking at the ILI9341 datasheet Electrical Characteristics, I just can't find information about power consumption. The information is also missing from the LCD module datasheet (ER-TFT024-3).
I know ...
9
votes
1answer
1k views
Why does this microswitch datasheet specify a minimum load current? [duplicate]
The Omron VX series datasheet mentions on page 6 that "Using a model for ordinary loads to open or close the contact of a micro load circuit may result in faulty contact.", and shows that their micro ...
0
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3answers
83 views
What could be a near rail-to-rail opamp with very low voltage for this use?
What could be a near rail-to-rail opamp with very low voltage for this use?
LM386 seems to be out of limits for my needs.
How do I choose it from datasheets? What values are important (of course ...
0
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3answers
59 views
Is rated current supposed to vary based on voltage?
Recently I have been reading a lot of datasheets and noticed that many manufacturers specify a current rating for their products (especially connectors) without specifying at what voltage the current ...
1
vote
1answer
34 views
What does it mean if input impedance given as a current regulator?
This SSR relay has an input impedance given in its datasheet as:
It says "Nominal Input Impedance is a current regulator". At 5V 16mA.
But how can I model this type of input impedance? I will use ...
1
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1answer
47 views
Datasheet Notation for Filter Parameters
I've been reading through the LTC1264-High Speed Quad Universal Filter Building Block datasheet but I'm having some trouble deciphering the meaning of some of the variables used in the equations for ...
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0answers
54 views
Looking for data sheet of the following Modbus Sensors #updated
I'm a noob in this area, please ignore any stupidity and lack of info and any help is appreciated and I'm ready to provide all clarification on the post if by chance any info is missing.
So i have ...
2
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1answer
73 views
Replace bad voltage regulator with another one that have lower output current
I need to replace a shorted TL750L05 +5V voltage regulator with a new one. The problem is I can not easily find a replacement part that has the same features. I found the LM2931M-5.0 but is rated at ...
6
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2answers
254 views
Difference between [W] and [WS] power rating of resistors
I see some datasheets of power resistors where power ratings are in Watts [W] and some in [WS] which I don't know what they mean.
What is the difference between them?
Example of datasheet
Some ...
0
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3answers
240 views
How can I determine whether this is a “rail to rail” opamp from its datasheet?
I know that rail to rail means that the opamp output can have a swing upto its power rail voltages.
So for a rail to rail opamp lets say if the supply test condition is +-12V, I would assume that the ...
