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

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3
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1answer
70 views

Do AC voltages on datasheets refer to peak voltage or Vrms?

I'm attempting to find a relay to switch UK mains voltage (230Vrms); this gives a peak range of approximately 325V, -325V. Consider something such as the datasheet for this relay. It has a ...
6
votes
1answer
137 views

DAC datasheet term confusion: FS-1LSB

In the Digital to analog converter HP16BME, I keep stumbling into " +FS - 1LSB " and I'm not sure what it means. I mean, I still don't know the exact scale value because I don't know what FS stands ...
3
votes
3answers
217 views

What to choose hFE or beta from the plot of transistor's datasheet

Suppose I have this BC635 transistor, if I look at hFE then I'd say that the lowest value is 25 from that table in the ...
14
votes
5answers
1k views

How to Transition from “Basic” Microcontrollers to ARM Cortex?

I have many years of experience with 8-bit cores from various manufacturers - namely 8051, PIC, and AVR - and I now have a Cortex M0 to figure out. Specifically this one, but I hope we can be more ...
0
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0answers
19 views

How to obtain approximations to the linked magnetic fluxes of a BLDC from its specifications?

I'm using the following expression to calculate the electromagnetic torque in a BLDC: $$ T_e = ...
4
votes
2answers
201 views

Looking for capacitance and voltage rating - How to read electrolytic SMD capacitor labels

I need to replace an SMD capacitor on a board. The printing on it says F1 560 2.5z I have googled intensely but have been unable to find information on how to read such a codes. I need to find out ...
0
votes
1answer
54 views

Where can I find correct documentation of old floppy drive formats?

I have an old drum machine with an ancient proprietary 3.5" SONY floppy disk drive with no information on the device itself that I have seen. The performance is spotty and it's very picky about disks. ...
0
votes
0answers
28 views

what are the extra pins on this 4x20

I am trying to control LCD ADM2004D with ATMega32 AVR microcontroller. There are 16 pins on top which are explained in the datasheet. But what about those four or six pins on right hand side? what are ...
0
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1answer
15 views

ATtiny861 pin change interrupt on PA.2: error in datasheet?

I faced with some confusion in subject datasheet: In one section PA.2 should be masking by PCIE1 bit as PA.2 is PCINT2 input and it should be within PCINT[7:0] and PCINT[15:12] range: On the other ...
0
votes
1answer
35 views

What does Limit at Min to Max values in datasheet means?

I have doubt while implementing I/O SPI interface for the ADF4158 PLL Synthesizer. I planned to use a simple I/O model to send bytes (using only 3 bits for 3 lines) using RS232 at 115200 BPS. I didn't ...
-2
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1answer
37 views

A6627SJP-T datasheet

i have this A6627 component in the printer. Looks like a current control circuit. Does anybody have a datasheet or at least knows the serial protocol this device uses? Thanks!!!
1
vote
1answer
137 views

P10 Outdoor RGB DIP LED Module

As I have to make driver for this matrix module, I have a big problem finding its schematic or datasheet. There are many similar modules on the internet, they are made in China. I'm making driver on ...
1
vote
1answer
30 views

Looking for datasheet for Alpha 21264C

Not too long back I did some reading on the Alpha CPU architecture and (probably out of a burst of nostalgic stupidity) procured a couple; there's only an issue - the ones I have are the 21264 ...
1
vote
1answer
48 views

e13007f npn transistor datasheet reading for turn on time

I am reading datasheet for e13007. You can get it here: http://www.datasheet-pdf.com/datasheetdownload.php?id=520587 (click on "Download PDF for PC") In "Electrical Characteristics" section under ...
2
votes
1answer
36 views

How do I model an LED with SPICE WITHOUT access to a Manufacturer's Datasheet

Looking to create a model of an LED (RL5-WW15030 from Superbrightleds.com): ...
3
votes
3answers
501 views

How do integrated circuit design companies create their datasheets?

Especially for something like a microprocessor. I assume the majority of information is "auto-generated" or we'd see a lot more typos and errors. A laughable scenario keeps popping into my head ...
1
vote
3answers
82 views

Datasheet hunting -

I'm having difficulty trying to figure out voltage outputs for FPGAs. Let's use the Xilinx XC3S2000 FG900 as an example, and say I'm trying to figure out the voltage for pin T22. I do a search for the ...
0
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0answers
51 views

Pinout/Datasheet of Delta DAC-08N001 backlight inverter

I'm repurposing a old notebook display for another project but I can't find the datasheet for the backlight inverter. It's labeled Delta DAC-08N001 and has a 5-Pin input connector (as opposed to the ...
0
votes
1answer
50 views

What does “Maximum Input Current” in a data sheet mean?

For example, in the datasheet of ATS030A0X3-SRPHZ, what does the maximum input current mean? Does it mean... 1) This is how much you are allowed to feed into the voltage translator (presumably using ...
0
votes
2answers
49 views

How to understanding min/max input values of Schmitt Trigger from datasheet

I am having some difficultly understanding the values described in this product sheet for the SN74AHCT14 Schmitt Trigger Inverter: http://www.ti.com/lit/ds/symlink/sn74ahct14.pdf Given a Vcc of ...
1
vote
2answers
92 views

cirrus/wolfson wm8731 - Connecting Analog Input to Codec

I am currently working on an embedded audio processor project based on the stm32f4discovery board and the wm8731 codec from cirrus/wolfson. I was wondering if anyone here is familiar with the codec ...
-1
votes
1answer
280 views

intel realsense vs kinect v1 vs kinect v2? What is the best depth camera to be controlled on an embedded device? [closed]

What would be the best of these depth cameras to be used in an embedded application? i know all of them provide SDKs for high level programming in PCs, but for an embedded application i think i would ...
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vote
2answers
282 views

What are the “No Connect” terminals on this multiplexer and what purpose do they serve?

I was looking through the datasheet for the ADG506A/ADG507A and on the chip there are these terminal marked as NC and underneath the image it says "NC = NO CONNECT". They are also not explained in the ...
0
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0answers
46 views

What parameters are key in selecting a transformer to pass digital data?

Looking to fiddle around with some digital signaling through transformers. Never done, so this is just to experiment and see what it looks like. For the purpose of digital isolation, what types of ...
5
votes
3answers
144 views

Why does the MCP1650 datasheet give such a low value for the inductor in a boost converter?

I'm currently designing an SMPS around an MCP1650. In the datasheet (see page 4), the recommended value of inductor is 3.3uH. However, all the inductor size calculations I've come across (here and ...
0
votes
1answer
48 views

Is this calculation for an optocoupler's resistor correct?

I'm trying to calculate what resistor to use for this optocoupler. Per the datasheet, it drops 1.3v at 50mA does this mean I should try choose a resistor that gives me 50mA? My supply is 3.3V so my ...
0
votes
0answers
68 views

Use LM324AN as unity gain amplifier

I am trying to read the voltage coming out of a voltage divider with resistors that could go into the mega ohms on the ADC of my micro-controller. The impedance of the divider is too great for the ...
5
votes
1answer
106 views

Why does the datasheet for this FET show two / three VGS(off) values?

I am using a MMBFJ270 P-Channel JFET and if you look at the characteristic graphs it is saying that there are two values for VGS(off) and in one graph it quotes three different values... Why does it ...
0
votes
2answers
31 views

Data sheet of SN74HC164 regarding the output current

On the data sheet of SN74HC164 there are two statements that I apparently don't understand: Cover page says: ±4-mA Output Drive at 5V Page 3 says: Continuous output current Io at Vo between 0 and ...
2
votes
3answers
132 views

Op-Amp Datasheet: Open Loop Gain vs Phase

I am attempting to decipher the datasheet for TI's LM6171 op-amp. Here is the open loop frequency response from the datasheet: How can I tell which curve is the gain and which curve is the phase? ...
0
votes
1answer
33 views

BZY97C47 zener diode datasheet questions

The BZY97C47 data sheet (I found no direct PDF link) confuses me on several points. I fail to find straight forward information about the maximum allowed forward current from the data sheet. Also, ...
0
votes
1answer
44 views

What is the pinout on my K F455P 7An filter?

I have a ceramic filter that I'm using for an AM receiver, but I don't know the pins for it. The lettering on it says K F455P 7An. I know that it's a 455 kHz signal filter and I think that it has a ...
2
votes
1answer
233 views

Does the MOSFET Rds(on) value really matter?

I am using MOSFETs in the ubiquitous RAMPS 1.4 Arduino shield for 3D printing use. The MOSFETs switch the voltage to the heated bed and the hotend (where the filament comes out). I need to replace ...
1
vote
1answer
71 views

What is power dissipation capacitance?

This question is derived from the answer to another question What is the input current of the 74HC595 The answer makes a note to the OP, that he should also consider power dissipation capacitance. ...
0
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2answers
45 views

Forward current for assorted LEDs

I have an assortment of T1 and T1¾ LEDs from sampler kits and beginner kits. The kits have sketchy documentation, with missing or inaccurate part numbers. I was able to track down datasheets for some ...
0
votes
2answers
37 views

Help with sensor output and data sheet

Here is all the circuitry I have. I only found thisdata sheet which may be for this anemometer: http://www.synchrodan.hu/letoltes/kriwan/kulsoerzekelok/szel/N292_INT10K_69000248_e.pdf What I ...
1
vote
1answer
67 views

Abstract Datasheet Dimension Notation

I am attempting to create a footprint for a Surface Mount Component and I am using the manufacturer's datasheet for reference. They include PCB dimensions but the notation used is a bit confusing. It ...
0
votes
1answer
133 views

What does the CT (center tap) value mean in a transformer datasheet?

I came across this datasheet, and I am unsure what the CT portion means. The datasheet does say that CT means center tap, but specifically in the image below what does the "10k CT" betweeen primary ...
0
votes
2answers
52 views

IRF740 datasheet. Error in the datasheet or I'm interpreting it wrong?

According to the IRF740 data-sheet from IR or from Vishay (they are nearly the same, the Vishay is better to read), the Qg is specified as 63nC under Id = 10A Vds = 320V and Vgs = 10V. But at page 4, ...
4
votes
3answers
110 views

What precisely is \$R_{ds(on)}\$?

I keep getting conflicting answers on this and it's absolutely killing me. Some say \$R_{ds(on)}\$ is the contact resistance in the FET (for instance, make many FETs of varying channel lengths, turn ...
0
votes
1answer
44 views

Datasheet supply voltage range

I am reading though a datasheet of TL064 and I am unable to find supply voltage range of this component. I've experienced this couple of times with datasheets... Farnell states its supply voltage ...
3
votes
1answer
61 views

How are C(OBO) and C(IBO) defined?

In a datasheet like this one, how are \$C_{OBO}\$ and \$C_{IBO}\$ defined? What I know: C for capacity O for output, respectively I for input B for base O for open, not connected But with ...
0
votes
1answer
84 views

Sony Xperia Z1 - Camera Module Datasheet

I'm writing to inquire about technical data related to the Sony IMX220 image sensor, as found in the camera module of the Xperia Z1. I will be interfacing with the module and require a datasheet ...
0
votes
2answers
73 views

Buck Converter Error Amplifier Input Polarity Confusion (TL598)

I'm trying to design a buck converter using TL598. I'm studying the technical article Designing Switch Mode Power Supplies With the TL598 - Application Report for this purpose. This article references ...
4
votes
3answers
308 views

Why do capacitor datasheets avoid directly giving the ESR value?

Most datasheets give a parameter called "loss tangent" instead of directly giving the ESR value. Why don't they just give a numeric value for it? Why is loss tangent preferred over ESR? Is there ...
1
vote
2answers
61 views

Hooking up an 8x8 LED board

I recently bought this 8x8 LED board from geeetech which came with this datasheet. I'm new to programming so I bought this board to "figure it out" but now I'm running into issues I don't understand. ...
4
votes
1answer
107 views

What does “Sourced from process <number>” mean in transistor datasheet?

On first page of Fairchild BC516 transistor datasheet it's written: Sourced from process 61 What does it mean? Is it important for part's users or it's some kind of production process ...
0
votes
1answer
50 views

Resistor programming of a boost converter, check my understanding?

I'm looking at the datasheet for a TPS6103 boost converter, and trying to figure out how to configure it for 5V 1A output. The datasheet is not making this easy to understand. Datasheet: ...
1
vote
3answers
245 views

Determine saturation base current from NPN transistor datasheet (or what resistor do I need to ensure saturation?)

The Fairchild 2N3904 has a long data sheet so let's use that for this exercise. I'm interested in using an NPN in common emitter configuration --- it's for switching. It's my understanding that an ...
0
votes
3answers
101 views

How to convert noise to noise density in mic pre amps

I am trying to compare two low noise mic pres for the lowest noise, and I am looking at the TI1012 and MAX9814 MAX9814: ♦ Low Input-Referred Noise Density of 30nV/√Hz TI1012: Output Voltage Noise ...