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Questions tagged [datasheet]

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

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KV7RF SMD Datasheet

Can someone identify a 6-Pin IC SMD with the marking code KV7RF? Searching in Google I didn't find anything. Any help on this?
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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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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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67 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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39 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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380 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
705 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
42 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
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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
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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
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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
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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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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
29 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
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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
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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
53 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
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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
796 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
81 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
144 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
103 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
23 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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37 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
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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
75 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
34 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
103 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
97 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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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
47 views

Rechargeable battery datasheet

Some parameters on the datasheet are a little bit confusing. What does the datasheet mean?
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2answers
75 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 ...
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1answer
102 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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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
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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
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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 ...
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1answer
34 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
104 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
103 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
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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 ...
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2answers
188 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 ...