Questions tagged [datasheet]
Datasheets are the primary documentation about components, describing their functionality and electrical properties.
700
questions
0
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1answer
18 views
Measurement of Quiescent Current and Operating Current in Gate driver
I am modelling LM5102 gate driver in PSpice. In datasheet they have provided two parameters named Quiescent Current and Operating current in which I am measuring quiescent current i.e, ground current ...
0
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0answers
27 views
What is the difference between various IR receiver ICs? [closed]
I'm in the process of buying a IR receiver to detect the signal from my Denon remote.
I used in the past Vishay TSOP31238 to detect a different remote, but I see that I have more options now: ...
11
votes
3answers
1k views
Is Texas Instrument wrong with their pin number on TO-92 package?
The official JEDEC standard to number pins on a TO-92 package is the following:
But in many datasheets from Texas Instruments, this order seem reversed. For example, this is a screenshot from the ...
1
vote
1answer
26 views
Velostat sensitivity to temperature
Velostat and some other type of conductive fabrics change resistivity based on pressure, but I did not found information about its sensitivity regarding the temperature.
Is the velostat resistance ...
2
votes
2answers
88 views
What is initial contact resistance in relays?
I am reading datasheet of a relay. I see a term, initial contact resistance in relays. What is the definition of this parameter? Thanks.
0
votes
1answer
25 views
High/ Low level output voltage in gate driver datasheet
Gate driver datasheet mentions about VOLL and VOH with test conditions Iol=100mA
I am testing this using this setup by calculating value (ron of pmos is 7.05 ohms) of load to be placed, Is this ...
1
vote
1answer
22 views
Interpolating output specs on SN74LVC1T45 transceiver
Section 7.5 of the datasheet for the SN74LVC1T45 shows minimum HIGH and maximum LOW voltages for output lines of the chip. Values are given for several different Vcc values (e.g. 2.3V, 3V, 4.5V). ...
0
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1answer
66 views
Can I get 9 V out with a 12 V input from the attached regulator?
The 9V regulator in this datasheet has a 2V dropout voltage. However, in the electrical characteristics on Page 9, the datasheet says that you need 15V input to get a 9V output. Does that mean I can'...
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2answers
42 views
Propogation delay and its measurement in datasheet
I am referring to Gate driver LM5102
Here the terms are bit misleading
1] Lower turn off propagation delay
2] Turn on delay
But application curves uses different measurements symbols(tp/tdl)/...
0
votes
2answers
48 views
How to calculate the maximum data rate or frequency of a bus driver
I'm searching a suitable bus driver for a project. I found the Nexperia 74VHC244D. On the website they say the maximum frequency is 60MHz (here).
But how do I calculate the 60MHz? Because it's not ...
1
vote
1answer
40 views
Molex 5039600695: What is the SIM card stopper referring to?
On some SIM card holder datasheets, I've seen references to a card stopper feature that prevents users from inserting a SIM card incorrectly. This card stopper appears to be a mechanical feature built ...
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1answer
44 views
Help understanding table in SAM E54 Datasheet
I apologize if this isn't the right place to ask this question, but I'm having trouble interpreting a table in the SAM E54 datasheet.
I am trying to configure the size of the SmartEEPROM on an ...
0
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2answers
45 views
How measure the opening angle (integral rotation of a cone) in a emitter
I have an IR emitter (EMIRS200_AT01T_BR080_Series) with the datasheet showing the Optical output power versus the opening angle as below.
Now, I would like to understand how interpretation the ...
0
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0answers
49 views
Atmega328p datasheet mistake “OCRA”
I was reading the atmega328p datasheet, and suddenly, i saw that a register is mentioned called "OCRA", on page 108 and page 160, which normally, should be register "OCR0A", which is widely mentioned ...
3
votes
1answer
196 views
What does the minus sign mean in measurements in datasheet footprint drawings?
I have seen this more than once where there is a measurement such as "4-0.7". In this context, it clearly does not mean 4 to 0.7 mm so what does it mean. See the attached picture:
Link to datasheet: ...
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0answers
38 views
Trying to Understand How to connect 74LS173A in Digital Works
A little bit of background first: I found an older application that seems to be very versatile. It is called Digital Works. You can find it here.
Within this application you are able to use basic ...
-1
votes
1answer
63 views
Can I use 13003 transistor in place of 2n2222?
I am working on a project which requires a npn 2n2222a transistor as recommandation. But as of now the transistor is not available to me.
Alternatively I have transistor 13003 and c945 available as ...
1
vote
4answers
342 views
Is there a difference between PIO and GPIO pins?
GPIO = digital + analog pins;
PIO = only digital ?
EDIT: PIO defined in datasheet as "Programmable input/output, also known as general-purpose I/O"
5
votes
1answer
204 views
What does this value mean in a BJT datasheet?
In the switching characteristics section of a BJT datasheet I often see test conditions like "Ib1=Ib2=1mA". I understand this is base current but what exactly do they mean by Ib1 and Ib2? Example: ...
0
votes
1answer
28 views
Load cell accuracy: rated output vs. full scale
I'm currently shopping for some subminature load cells for a research project. I've narrowed it down to two options, the FUTEK LCM100 and the Burster Model 8417. Problem is the two specify their ...
1
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1answer
68 views
What Resistor to use between Source and an IC
I'm trying to make a clock, and as part of that I need to power some IC's. To give a specific example I'm looking at the TI SN74HC163 4 bit counter. After some searching around, I found myself ...
-1
votes
1answer
62 views
Resources for finding thermal impedances for common IC packages
I'm just looking for some extra resources for thermal impedances of JEDEC standardized packages. I've already found one such article posted by JRC, https://www.njr.com/semicon/package/thermal.html , ...
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1answer
87 views
Working principle of the AD8232 high pass filter
This is the datasheet of the AD8232.
On page 22 in the section "Additional High-Pass Filtering Options" is this diagram:
It is said that the cut off frequency is located at
I tried to find out ...
1
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1answer
55 views
Datasheet for this transistor?
I found this transistor on a board that I have no idea where it came from and I want a datasheet of its current and voltage handling. Has anyone seen something like this? I have looked all,over the ...
1
vote
1answer
57 views
Can the FTDI Tx and Rx tension level be different that it's VCC?
I'm building my own FT232RL to convert a UART signal to USB.
The source of power will be the USB 5V, but for reasons of the circuit i already have it would be easier to let more of the circuit keep ...
2
votes
2answers
108 views
Problems with understanding memory map STM32F446RE
I have a problem with the understanding of the memory map of the STM32F446RE.
In the Datasheet is the system memory (0x1FFF0000 - 0x1FFF7A0F) 30,51kb big.
But in the AN2606 the system memory is ...
2
votes
3answers
54 views
Infrared Receiver - Simple questions regarding data sheet and basic electronics
I've purchased a 36 kHz IR receiver (TSOP38436) but I'm still learning about electronics and I'm not sure how to connect this to my micro controller (Arduino). (Also, I'm using 36 kHz instead of the ...
0
votes
0answers
51 views
Unable to find data sheet for MAX8918ITM
I am quite new to electronics, so I apologise for the inevitable mass of stupidity in this question.
I am trying to find the data sheet for the LCD driver MAX8918ITM, from a Nikon COOLPIX L110, and it ...
0
votes
1answer
15 views
PCA9956A How to set AIF bit
I am using the https://www.nxp.com/docs/en/data-sheet/PCA9956A.pdf chip to control LEDs.
To set the autoincrement mode three beets are needed,
But the AIF bit is ...
0
votes
1answer
14 views
ITS4060S-SJ-N overvoltage protection
I (think I) want to use an ITS4060S-SJ-N (+datasheet) in a circuit that can't handle over 40V (an LM2576T-5), but will normally receive 8-30V with a ≤12W load. Its purpose would be to provide ...
0
votes
1answer
48 views
Understanding PCB footprint for ESD321DPYR
Looking at the datasheet for component ESD321DPYR, the PCB footprint looks something like this (copy and paste from page 16):
However, the footprint I downloaded from Library Loader here, a trusted ...
0
votes
2answers
80 views
Working Principle of AD8232 Instrumentation Amplifier
Before begin asking, here the datasheet for the IC https://www.analog.com/media/en/technical-documentation/data-sheets/AD8232.pdf
At page 16 under Theory of Operation Section
What I failed to ...
0
votes
3answers
87 views
Connecting a 5 V signal to a 3 V tolerant pin of a PIC
I have a situation that happened in my case, where i'm putting an AC signal that goes from 0 to about 4,5 V in a 3 V tolerant pin of a PIC.
The pin in question is ...
2
votes
2answers
61 views
How to extract minimum supply voltage from the datasheets
I am relatively new to electronics and need to know
What is the minimum supply voltage (Vcc) for LM1875 and for LF347 and how do I extract it from the datasheets?
In LM1875 it is written that the ...
2
votes
1answer
43 views
Why does the Datasheet for the ATMEGA88 have two pins for PORT D bit 5 (with different functions, too)?
The ATMEGA88 Datasheet has two pins for PD5 on page 3 for the TQFP layout. Those pins being Pin 9 and Pin 12. Normally, I wouldn't blink twice, but It seems that both pins have different functions. Is ...
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0answers
30 views
Correct way to drive the L6203 Full Bridge driver
I need to control a brushed DC motor in both directions using the L6203. The block diagram is shown below. Motor voltage will range from 13 to 16.8V, with a maximum RMS current of around 3A.
From the ...
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1answer
132 views
2N2222 transistor datasheet saturation current
I am designing a 2N2222 transistor common emitter voltage-divider amplifier. Using 9V for the power supply and trying to make the loadline to determine Q. How do I determine the sauration point ...
1
vote
1answer
115 views
How do I read the dimensions to create a PCB footprint?
I'm trying to make a PCB footprint for the SSD1306 ribbon strip, and am unsure of the correct dimensions for the solder pads. The horizontal dimensions are clear enough but I don't know where the pads ...
4
votes
1answer
37 views
ADS62P22 ADC output format
I am having trouble interpreting the Output Data Section of the datasheet for the ADS62P22 ADC.
Page 56 includes the following description:
Output Data Format
Two output data formats are ...
0
votes
0answers
34 views
Does BQ24195 charger detect USB modes DCP, CDP, and SDP by itself?
I use a BQ24195 chip as a charger. The datasheet is available here:
http://www.ti.com/lit/ds/symlink/bq24195.pdf
I need to identify if the USB is connected and if it is connected, in which of the ...
0
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1answer
411 views
KV7RF SMD Datasheet
Can someone identify a 5-Pin IC SMD with the marking code KV7RF? Searching in Google I didn't find anything. Any help on this?
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0answers
23 views
Limiting current in a NCP3020A switched DC/DC buck converter
I want to design a 12VDC to 5VDC converter using a NCP3020A. As my application has nothing special, I should follow the topology of the Typical Application circuit, and reapply the formulas in the ...
0
votes
1answer
86 views
How to convert accelerometer data into G with the ADXL345 digital accelerometer
Am totally new to electronics and the datasheet is very confusing to me, so can anyone please guide me through the specification of the accelerometer? So that i can have a better understanding on the ...
0
votes
1answer
30 views
CSB batteries Constant Current Discharge Characteristics
I'm comparing batteries for use in UPSes and during my tests I was consulting the datasheets of 2 manufacturers. The datasheet from SunLight is crystal clear but CSB's datasheet is using terminology ...
0
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3answers
78 views
Log plot with 5 divisions
I have some troubles with reading this
datasheet.
For example the plot
I know normal log and double log scales but the plots in this datasheet have only 4 divisions. Is it then 1,2,4,6,8,10?
2
votes
3answers
92 views
Possible Error in Microchip Datasheet
I am working on duplicating a product according to the Microchip datasheet. http://ww1.microchip.com/downloads/en/appnotes/00857b.pdf
My question has to do with something I found in the schematic (...
2
votes
2answers
53 views
Temperature specificiations on MOSFET Safe Operating Area
Here's a SOA graph:
What I don't fully understand is the notes area at the bottom:
*Notes:
Tc=25°C
Tj=150°C
Single pulse
Every MOSFET datasheet seems to have a similar set of notes,...
0
votes
2answers
46 views
Calculating voltage drop and current use of an IC
I’m trying to figure out the voltage drop and the current used by a Johnson counter from a data sheet and am feeling a little lost.
In particular I’m looking at a CD4022B from TI.
I’m looking at ...
2
votes
3answers
386 views
Supply current of negative rail
I'm using an LTC1983ES6-5 to provide a negative rail for both a MAX4311 and a MAX4395. LTC1983 provides up to 100 mA, but I cannot find in the other datasheets how much current is required for the ...
2
votes
2answers
775 views
If Manufacturer spice model and Datasheet give different values which should I use?
I'm trying to simulate an LED circuit but I am getting a large difference in results from the simulation vs calculations done using the datasheet information. In this case both the spice model and ...
