Questions tagged [datasheet]
Datasheets are the primary documentation about components, describing their functionality and electrical properties.
1,332 questions
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BC547 datasheet, what is this graph used for?
I have recently started studying BJTs with an hands-on approach.
I am trying to make a simple switch by working in the cut-off and saturation regions and, while the equations seem quite clear to me ...
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Land pattern for TDK CAA573 Megacap
I am planning to use one of the CAA573 "Megacap" capacitors from TDK, the CAA573X7S2A476M640LH. According to the datasheet, the following land pattern is recommended:
Length(L)
6.00mm ±0....
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TI UCx84x datasheet - possible error in the application schematic?
The UCx84x datasheet from TI: https://www.ti.com/lit/ds/symlink/uc2845.pdf, last updated in October 2024 at the time of writing, has the following application schematic, Figure 8-2:
The highlighted ...
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Confusion with gate source voltage of a power MOSFET
This logic-level power MOSFET's Vgs is given at three places in its datasheet:
At the beginning under the "Features" as:
Under the "Absolute Maximum Ratings" as:
And at under the ...
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Accessing 16-bit Registers: Is this an error in the ATTiny102 datasheet?
EDIT: Microchip responded that this is an error in the datasheet.
We have received clarification from our technical experts regarding the 16-bit register access order in the ATtiny102/104. After a ...
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Threshold levels doubt on logic gates datasheet. Limit and typical values meaning
I'm working with 74HCT1G32 but I'm not sure how to interpret the datasheet value for high and low level voltage.
Let's talk, for example, about the high level.
In datasheets from other manufacturers, ...
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SKY65900-11 Input level
I wanted to use SKY65900-11 2.4-2.5 GHz +28 dBm WLAN Power Amplifier, but when I checked its datasheet, it didn't mention the allowed input value. Has anyone worked with this IC?if YES. So how you ...
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Why does the USART count in STM32 MCU differ between datasheet and IDE?
Regarding this STM32 MCU family (in my case STM32F303K8T6), in the datasheet there is the following statement about UART peripherals:
If I'm not wrong it says this MCU has three USARTs.
But when I ...
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Ethernet driver Pulse HX1188NL 1522-PP pin names
I want to get Ethernet driver pin names, but in datasheet was missed some pins. Certainly, was missed pins under numbers 4, 5, 12, 13.
Ethernet driver schematic picture: Datasheet
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What is A226L and where is the datasheet?
What is A226L and where is the datasheet?
Picture:
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In designing an ESP32-C3-WROOM dev board, how can I ensure that my board will be detected when I plug my USB-C cable in?
I have two ESP32-C3-WROOM dev boards of my own making. I plugged my USB-C cord in, but the ESP32 wasn't detected. I scoured the WROOM data sheet for answers.
I found on page 13 that while GPIO2 isn't ...
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How to implement OTG FS hardware using embedded PHY on STM32F105/107 microcontrollers
I want to be able to use the DFU1 and OTG2 FS3 functionalities in both host and device modes,...
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How to create the exposed pad for this component based on its drawing?
Recently I want to draw the pad of the blue line that I circled, but I don't know the width and height of the pad I'm drawing. Besides, I was wondering about 2 x 2.28 4 x 1 etc. Does it mean something?...
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Why does the Rᴇxt value in the HSE clock section of the STM3210C-EVAL board differ from the Rᴇxt value calculated from the formula provided in AN2867?
Based on the things I'll explain next, I have two questions.
First section
The following figure shows the STM3210C-EVAL's HSE1 clock schematic with ...
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How can we use the AN2606 document to identify the STM32 series that can be programmed through micro USB (without the need for ST-Link and USART)?
I would rather use a micro USB interface to program an ST microcontroller (preferably a low-cost series) than a ...
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Identifying pinouts for ADSP-400NWT and/or ADT_NEW2S3C 1/4 CONV V.3.0 duty converter
I've recently acquired an old storefront LED sign. It's four 16x16 celled panels, each cell containing a red and green LED. Two boards drive the sign - ADSP-400NWT is the main board that handles ...
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Will this convert 10V to -10V? (ICL7660 Voltage Converter)
I need to convert 10V to -10V.
I found this IC (ICL7660) and thought it would do the trick. It seemed simple enough following the datasheet. However, I've since discovered that there are many ...
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What do WR, RD, and CS pins do on ADC (ADC0804LCN)?
I want as a project to be able to read analog voltage and display it in a 7-segment display(s). In my local electronics store there is this ADC I am interested in:
https://www.alldatasheet.com/...
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Document UN00044 related to IR35201
where is the document UN00044 related to IR35201, I read in Infineon-IR35201MTRPBF-DS-v01_00-EN on page 51 there is the line "Sets the switching frequency in KHz per table found in user
note ...
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Input impedance common-mode of an Op-amp
In an op-amp (OPA838) the input impedance common-mode is as follows:
What is the range for the input impedance?
I want to interpret this: (35 || 1 MΩ || pF)
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What does 'open-drain' mean here? What special attention should I pay when designing the connection of this I/O pin?
In Xilinx's 7 Series FPGAs Configuration User Guide (UG470), they say INIT_B is an open-drain bidirectional pin. What does it mean by 'open-drain'?
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What should be the input voltage for this voltage regulator? (How to read the datasheet of a regulator?)
This is the datasheet for TPS748 regulators. I include a section from it in the following picture. Does 'Ultra-low VIN range: 0.8V to 5.5V' mean I can use whatever input voltage between 0.8V and 5.5V ...
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Output characteristics of N-Channel MOSFET's for negative Drain Voltage and Current
I have seen some questions recently about MOSFET Drain current Id being negative while the MOSFET is turned on. Links to some of them:-
MOSFET driving backwards - posted by NBK SOFT
Dual MOSFETs used ...
2
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1
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311
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555 Timer k-factor graphs mislabeled?
Context: looking to generate a 1.5MHz square wave. In the MIC1555/7 datasheet there is an example astable oscillator circuit on page 2, which lists the output signal frequency as 8kHz for R=1k and C=0....
2
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Voltage for Photo diode
I'm using this IR photo diode, and I'm wondering about the voltage I run across it. The datasheet says the forward voltage is typically 1.56V, but there's no range of acceptable values.
Later on, the ...
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How much headroom for "absolute maximum" values?
How much headroom should we give to "absolute maximum" voltages?
In selecting a TVS diode, for example, we might see that the circuit it is intended to protect has absmax 40V (for example ...
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Flyback Power Transformer Datasheet: Voltage/Current Rating Confusion
Hello, I am looking through a flyback converter power transformer datasheet, and had some questions regarding it. It seems this datasheet doesn't specify the input or output voltages of the primary, ...
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How to design layout for Taiyo Yuden AH316M245001-T chip antenna?
I’m trying to figure out how to properly design layout for the AH316M245001-T chip antenna:
Here is the layout from the datasheet
The datasheet shows the antenna placed on a copper-free zone, but ...
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Interpreting this P-MOSFET's SOA (Safe Operating Area) graph?
These are my operating parameters:
It's being used as a load switch, so it will be permanently on most of the time, conducting DC electricity.
My Vgs = -4.5V to -...
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MK66FN2M0VLQ18 decoupling capacitor help?
Where do I find the decoupling capacitors to use for the MK66FN2M0VLQ18? Whenever I look for more general help, I am told to just check the datasheet. I can not find the information on the datasheet ...
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Confusing limits and specifications in the MOSFET datasheet
In the datasheet of the 2N7000, 2N7002, NDS7002A MOSFETs, the max. rating for the drain current is 115mA - 280mA:
But electrical characteristics and the typical performances show drain currents up to ...
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Datasheet interpretation: Meaning of Input Voltage vs Supply Voltage
The KXO-V96 is a 4 pin oscillator with GND, VDD, Output and EN (Enable). I think to enable the oscillator, EN should be connected to GND but I am not sure.
My issue is with interpreting the 1 page ...
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Voltage Unit in Transistor Datasheet
I was referring to this datasheet of SS8550 PNP transistor. In page 3, under "TYPICAL PERFORMANCE CHARACTERISTICS" section, there is a graph of Base−Emitter Saturation Voltage and
Collector−...
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Reconciling LT3580 Boost/Inverting DC/DC Converter Application Circuit with PCB layout
I am currently looking to construct a PCB that will take +9V (from AAA batteries) and output -11V. I am using the LT3580 to achieve this, modifying the datasheet supplied application circuits. The ...
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Understanding Gas Sensor Output Voltage from Resistance Change
I'm working on an air quality monitoring system using MQ7, MQ131, and MQ135 gas sensors. I've explained the working principle to my professor, including how gas concentration changes the sensor's ...
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"No connect or connect to GND" - benefits to connecting pins to ground?
The datasheet for the ICM-42670-P says of the four RESV pins, "No Connect or Connect to GND or Connect to VDDIO" (page 18).
My question is, is there any benefit to connecting these pins to ...
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Do I ground IC pins marked "NC" in its datasheet?
From the datasheet of the Qorvo TQP3M9035 I am using, some pins are marked as NC. However, the description says that I should provide grounded pads for mounting integrity. If I ground those pins, won'...
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Missing dimensions when trying to create footprint for IMU - ICM-42670-P
I am trying to design a footprint for the ICM-42670-P IMU (datasheet linked, footprint dimensions on page 37), but there seem to be missing dimensions. The labels L and L1 in the picture below are not ...
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Can anyone help me in identifying this SMD part?
I assume it is a thermistor (PTC1) but I don't know its value or data sheet
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How to select a switching regulator, output capacitor and inductor, to handle an output transient peak current with a given input voltage?
I'm designing a circuit that contains a switching regulator that will need to cope with a transient peak current of around 700-800 mA at startup time. I don't know how long this transient exactly ...
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What is the correct way to mount these LEDs?
I was looking for reverse-mount addressable RGB LEDs and I found these:
SK6812MINI-E-012
SK6812MINI-EA-000
The only difference I can spot is the former has straight pins and the latter has bent pins,...
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ICE40HX1K pin ambiguity
Here I have again re-designed an ICE40HX1K board schematic - this time with some added things:
Attached no-connection symbols to the NC pins
Connected the ...
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Lattice ECP5 output slew rate not in datasheet
The ECP5 sysIO datasheet mentions two programmable skew rates (FAST and SLOW) for LVTTL and LVCMOS outputs but the actual slew rate value is never given.
Has anyone measured the output signal rise ...
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Finding/Calculating Supply Current from Datasheet
I am trying to find the supply current for part SN74LVC244A-Q1. Usually it is labeled Icc or quiescent current. However on the data sheet it does not. It gives you continuous input/output current and ...
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2
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Interpreting a relay contact max ratings
This relay has the following max contact voltage, current and power ratings:
Now focusing on the DC switching from the datasheet, the max switching current is 10A and max switching voltage is 30V. ...
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2
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Understanding efficiency curves of a DC DC converter
About this DC-DC converter regulator, I have the 5V output 1A model.
There are some efficiency curves depending on the input voltage. What does that mean in my case where the input voltage will be 19V?...
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Can I match the coil voltage of a relay this way?
Regarding this particular relay, it has coil voltage stated as 12V with the coil resistance 275Ohm.
If I have to use 13.5V instead of 12V, can I just use a series resistor such as a 33Ohm 1Watt ...
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Analyzing optocoupler circuit
I'm trying to determine the forward current of the optocoupler in my circuit diagram below. The optocoupler PN is 4N49U, and the POWER_ENA is driven with 5V. With ...
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How to estimate pull up/down resistors for the digital pins of this IC?
Regarding this power multiplexer IC's the digital inputs D0 and D1, the input impedance of the D0 and D1 is not given. Only Input current at D0 or D1 is given as 1.4uA.
So far I ended with the ...
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Confusion with interpreting the functionality of an IC
I'm trying to understand the use of this power switch IC in automatic mode. And at one page of the datasheet it mentions the following application:
In my case, I want to use this IC to auto select ...