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Questions tagged [datasheet]

Datasheets are the primary documentation about components, describing their functionality and electrical properties.

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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 ...
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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 ...
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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 ...
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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 ...
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2answers
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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 ...
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3answers
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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 ...
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2answers
57 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 ...
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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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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
80 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 ...
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1answer
113 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 ...
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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 ...
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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 ...
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98 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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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 ...
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1answer
69 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 ...
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1answer
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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 ...
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3answers
71 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?
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3answers
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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 (...
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2answers
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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,...
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2answers
44 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 ...
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3answers
385 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 ...
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2answers
760 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 ...
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1answer
44 views

Isolator’s (ISO7720) recommended current

I have a design which uses an ISO7720 digital isolator, with a 3.3 V supply voltage. My output load is 500 Ω. Due to area constraints, I’d like to avoid adding a buffer on the output, if I can. The ...
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Can this transistor (2N2222) take 6 V on emitter-base? Am I reading the datasheet incorrectly?

I have created the following circuit to better understand how to use a transistor as a switch*. I've been struggling with understanding datasheets for transistors. simulate this circuit – ...
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1answer
57 views

How do you deal with operating ranges of low current LEDs?

I'm looking at using an IN-S85AT5UW in an upcoming hobby project. I'm pretty sure it says that with the white LED, I'll get about 180 mcd and that the maximum continuous forward current is 5ma. That ...
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2answers
56 views

I cannot se how the device is a buck charger when charging and a boost on the output

I cannot se how the device is a buck charger when charging and a boost on the output. Am I stupid or is the datasheet wrong? "5A Single Cell Li-Ion Switching Battery Charger with Direct Charge, Power ...
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1answer
94 views

Mosfet \$\mathrm{V_{GS}}\$ not in datasheet

I have a datasheet for a MOSFET but can't find the \$\mathrm{V_{GS}}\$ to get the rated \$\mathrm{R_{DS(on)}}\$. It only shows the \$\mathrm{V_{GS}}\$ maximum rating which is the usual ±20V. The \$\...
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1answer
56 views

What is this contact on a jack socket schematic?

I'm looking for a 4-poles (TRRS) 3.5mm jack socket with integrated switch, and stumbled upon this connector schematic: (this is an extract from the CLIFF FC68129 datasheet) I understand that pins 1, ...
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2answers
2k views

Microchip documentation does not label CAN buss pins on micro controller pinout diagram

Link to the data sheet I want to use Microchips DSPIC33FJ128GP802 in a new project and want to use the ECAN buss. The problem ...
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28 views

Where to find details of dimensions and doping of a typical bjt

I have been searching for dimensions and doping levels of base, emitter and collector for a typical bipolar junction transistor presently in use. I have tried searching on internet and seen datasheets ...
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1answer
31 views

Discrepancy in datasheet for AM26LV31E?

The AM26LV31E datasheet, a differential line driver, states this (on page 4): and this (on page 10): At best, this seems ambiguous and, at worst, contradictory. Is the logic of this statement (8.1) ...
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2answers
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How to read this figure (UDN2981 max current)?

This question is related to this question: why-are-the-pins-of-an-udn2981-related? In the UDN2981 datasheet, the figure below shows the maximum current (page 14, bottom left picture). Does this ...
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2answers
92 views

How to determine maximum switching frequency of power modules?

Power IGBT and MOSFET modules give some datasheet values that look like they could be used to calculate a maximum frequency, but I'm not sure how to interpret them to do so. The datasheets generally ...
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1answer
42 views

How does the spectral response of a photodiode change with bias voltage?

Look at this data sheet, in the second page we have a graph for the spectral response. Now, I have learned that photodiodes must be reverse-biased in order to get a decent signal from them, but then ...
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How much does the Bias Voltage affect the NEP of a photodiode?

Look at this data sheet for example. Everything there is measured at 0V, including the NEP, if I connect that photodiode in reverse bias, how will that NEP change?. I'm inclined to believe that it ...
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1answer
58 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 ...
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1answer
220 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 ...
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2answers
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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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2answers
830 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
99 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
145 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
139 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
27 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
41 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
55 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
98 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
37 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 ...
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1answer
110 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
98 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 ...