Questions tagged [specifications]
Specifications for an electronic component provide the basis for parametric part selection for operation or optimum performance of a circuit or to prevent damage to integral or connected circuit components.
217 questions
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What is the difference between input and input capacity on an AC adapter? [duplicate]
I got a really old japanese vhs camera that came with an AC adapter, and I'm trying to figure out if it's safe to plug it into a US outlet. The label says
Input AC 100-240V 50/60Hz
which I think ...
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How to interpret significant figure and its multiplier in capacitor temperature coefficient specification?
This site gives us this table:
What do 'Significant Figure of Temp Coefficient' and 'Multiplier to significant figure' mean? Like, what do C and 0 as in C0G mean? I guess the third column in the ...
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I need help Identifying an old TO-3 package transistor marked IR1020 Any help welcome! [closed]
I have had this thing since 2013 after going to a garage sale and getting a box full of old mostly linear active componants. The manufacturers' name looks like this IOR with the o hollowed out and the ...
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Can I power this ADM3232E IC from an GPIO pin of STM32F303 MCU?
I'm using this STM32F303 MCU and I need to power this Digilent Pmod RS232 (UART to RS232) converter module with schematics given here and apparently uses this ADM3232E IC.
For the MCU I use the ...
2
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1
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Specifying a device's electrical power in datasheet
If I'm not wrong, all consumer electrical devices I encountered before they mention the power spec as consumed power meaning active power.
But I stumbled upon a device spec showing power as VA not W. ...
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Understand nominal current of Phoenix Contact PCB headers
The PCB header MSTBVA 2,5 HC/ 2-G-5,08 (1924305) from Phoenix Contact is listed with a nominal current of 16A.
Does this mean that I can load each pin with 16 A simultaneously or only both in total?
I ...
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3
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316
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Is there a concern having a faster rise time in I2C fast mode than 20ns spec?
I have a rigid board system that contains a µC and sensor which measures I2C SDA/SCL rise time (400kHz) at 15-17ns between 10%-90% of the signal. When I look at the NXP spec, it states a minimum of ...
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416
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Measuring brushed DC motor inductance
I am trying to measure the inductance of a brushed DC motor for which I have a specification sheet from the manufacturer. The spec sheet states an inductance of 1.8 mH (and a resistance of 0.05 Ohms)....
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Which specifications are allowed to deviate with MOSFET?
Please tell me which specifications are allowed to deviate with MOSFET?
I need to buy MOSFET, in my case AUIRFS4610. but that one is not available, however there are substitutes. but I am not 100% ...
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Connector's number of mating cycles
I'm looking for a removable SMD power connector with minimum footprint to connect Li-ion batteries, and the best candidate I've found at the moment is Panasonic R35K series, which has tiny 2.24x1.3mm ...
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What determines I2C interrupt service time after address byte ACK?
I am looking at the NXP spec for I2C and what I don't understand is the timing constraint for the portion of the transmission where the "clock line held LOW while interrupts are serviced" (...
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2
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Sample and Hold IC specification
I am currently designing my 3rd year project in EE. I have an MCU with an ADC that samples at 15 kHz. The signal I want to sample has a 0.5 µs rise time which is equivalent to a bandwidth of 700 kHz, ...
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What specs should i look for for a mosfet in this project? [closed]
I am a hobbyist and not a native so bear with me. I need a MOSFET that can switch at ~ 100 MHz and withstand up to ~ 40 V and 40 A with a variable duty cycle. If my calculation corrects 1/100 MHz ...
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Origin and underlying sense of the term "Posted" in PCIe
When PCI Express replaced the operation of reading directly from a PCI peripheral card over a bus, directly addressing its I/O ports, or performing a configuration cycle on it directly, with instead a ...
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Exceeding a relay's safety AC rating
I was wondering if it would be a safety hazard to exceed a relay's AC rating of 125VAC with 230VAC? Will it work? Here's the data sheet. I'm using the 5V variant.
Image source: Mantech Electronics - ...
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Voltage reference 1/f noise datasheet comparison
I would like to compare the 1/f noise of the voltage references LT1021 and LTC6655. The LTC6655 has a spec of 0.25 ppm (0.1-10Hz) and the LT1021 has 3uV_pp (0.1-10Hz).
I assume these datasheet ...
2
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Isolation voltage spec in transformer
Could you please help me understanding this transformer spec?
I am planning to use HCTSM80101AAL transformer and I would like to make sure that I am referencing the proper specification for voltage ...
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Mean Well Power supplies have much lower efficiency and much higher leakage current than rated
I am going to have a power supply which will always be connected to AC mains and occasionally, a led strip will be connected and disconnected to the supply with a relay. I want an efficient and low &...
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3
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393
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How to interpret External Clearance spec on HCPL3700M IC?
The spec for the HCPL3700M (AC voltage detection IC) lists an "External Clearance" of ≥7.4mm.
Is this saying that no component or exposed trace should be within 7.4mm on any side of the chip?...
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Why are Lunar White LEDs not a standard part, or what am I missing?
TL;DR: Lunar White is a widely-used standard color in signaling work (like, every pedestrian signal that conforms to ITE specifications uses it, as far as I can tell), so why can't you buy Lunar White ...
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What does 'Minimum Holding Voltage" refer to for a Thermal Fuse?
One of the components I am looking at for a new design is a thermal fuse. In the documentation it refers to a "Minimum holding voltage". Source: https://www.bourns.com/docs/Product-...
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2
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389
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What is meant by TTL in this context?
Regarding this driver manual, the analog input has range 0-5 V with 1 MΩ input impedance. But the manual also writes that the analog input is not TTL compatible:
I thought the term "TTL ...
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Calculate DC cable diameter
Please assist in defining the required DC cable diameter for the following requirements:
Voltage: 48 volts
Watt: 8500 watt
Running distance: 50 meters
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Transistor as switch that can handle a high base current [closed]
Which cheap, simple transistor can handle a high base current and doesn't need a base resistor to use it as switch?
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EDID emulation in HDMI and DisplayPort, is DisplayPort really more difficult?
I've been doing a lot research on EDID and HDMI and DisplayPort and I have a question about the relative difficulty of always-on EDID Emulation between the two specs.
With HDMI, almost every Matrix ...
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3
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1k
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Transistor choice for solenoid actuation
I'm a software guy trying to do a small electronics prototype project and need help with selecting a transistor. I know this must sound like a very basic question here, but this looks like a great ...
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2
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136
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Specs for obsolete relay OEG OL-C-212H12VDC
I've extracted a relay labeled OEG OL-C-212H12VDC from an early 90s Technics amplifier whose service manual refers to as RSY0009-0. It has an additional line indicating 9142 T. Its coil is busted, ...
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6 A, 30 VDC relay as substitute for a 5 A, 30 VDC relay
May I confirm on this forum if a 6 A, 30 VDC relay can be used as a substitute for a 5 A, 30 VDC relay? They have the same number of pins as well as holding coils orientation.
I purchased a relay as a ...
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3
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Is HSYNC required during VSYNC for VGA?
As a development to my previous question I am developing a protocol to drive VGA through lines originally designed for SPI communication.
The problem is that I may be able to instruct the receiving ...
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Confused with parameter definition of spectrometer
Regarding this spectrometer specs, what is meant by "spectral sampling resolution"`? It is give as 2.55 nm. And how is that different from spectral resolution? The term "spectral ...
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Are there any published values for GPIO slew rate or rise/fall times on ESP32?
Are there any published values for GPIO slew rate or rise/fall times on ESP32? I had a look at the datasheets and couldn't find any. I also couldn't find any measurements elsewhere. Have Espressif ...
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0
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Clock division and duty cycle for ST8034P Smart Card interface
The ST8034 is a family of interface ICs for contact Smart Card. Here is the Data Sheet. My question is about the ST8034PQR.
when the CLK output is active, does fCLK = fCLKIN or fCLK = fCLKIN/2 ?
...
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2
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Rectifier diode specs not clear
https://www.tme.eu/Document/e6d16d51cc343d73832bf32cc9d69d1f/p2500a.pdf
How does that "RthA < 4 K/W 1)" work?
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Is the Rds(on) of a MOSFET typically specified at the boundary of the saturation and triode regions?
Datasheets specify the Rds(on) of a MOSFET at some specific gate-source voltage, e.g. 100mΩ @ Vgs=4V. Up until now, I assumed that the test gate-source voltage was essentially arbitrary and chosen ...
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4
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Is there a general rule to calculate heat dissipation of electronic equipment?
Is there a general rule for calculating heat dissipation in electronic equipment if it's not listed in the specs?
I have a couple of projects coming I'm working on that require this. For one situation ...
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Non-overlap time in auxiliary contacts on contactors
As long as I have tested, my standard contactors such as Schneider TeSys LC1D32A are equipped with (13-14) NO and (21-22) NC contacts, which never close simultaneously.
For this device, the auxiliary ...
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2
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282
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Understanding voice voil actuator vendor specifications
I'm thinking of potentially using a linear voice coil actuator to move a 90 g mass between 0 mm and 1 mm and back in the horizontal direction with a frequency of 20 Hz. Assuming triangular ...
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1
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1k
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PID control with anti-windup time specifications
I have scoured the internet for a quite some time now and could not seem to find the answer to this.
Is there a formula that approximates, with these specific gains (Kp, Ki, Kd, Kt), the rise time, ...
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0
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NEC asic information from around 1990
I'm looking for datasheets with specification for the NEC ASIC/Gate Arrays from around 1990.
More preciselly, any information with specifications of their ASIC/Gate Array lines.
I would like to known ...
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How to know if an opamp can drive capacitive loads?
There has been a lot of questions about how to stablise opamp circuits driving capacitive loads. However, I know there are some op amps that are designed to drive capacitive loads but I am struggling ...
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2
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What can I assume for the voltage tolerance of commercial 12 VDC equipment?
I am thinking about 12 V backup power supply options for my home networking equipment; these run from 12 VDC wall warts supplied with the equipment. The data sheets for such equipment typically say ...
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10000 pF - so many zeros
Why are 10 nF capacitors sometimes (usually) specified as 10000 pF?
Why are we trying so hard to avoid nF? Seems unnecessary and error prone.
Note: Question also relates, of course, to 1 nF vs 1000 ...
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Questions about relays specifications
I want to use a relay to switch high power LEDs ON and OFF. Nothing out of the ordinary yet. My problem comes from the fact that my control voltage is not stable (it varies from 5V to 12V for example)....
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Interpreting spec sheets for an inverting op amp
I'm interesting in putting together an inverting op amp to take a signal voltage from 10 V to 0.01 V (Gain = -60 dB). By signal voltage I mean the current input and output will be low (e.g., <1 mA)....
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Acceptable SNR for a Sound Level Meter
I'm designing a low power (<150mW) sound level meter (SLM) using a 24bit ADC (preliminarily using the LTC2512-24). This is for audible frequency range signals only (20Hz - 20kHz). I'm focused on ...
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2
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How to use units given for heatsink thermal resistance?
In looking for a heatsink I came across a company giving the thermal resistance of extrusions in °C/W/3in. How do I use this?
Say I use an extrusion with a specification of 1.5 °C/W/3in and get it ...
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1
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Is it ok for a DC socket 5.5x2.1 to supply higher current than in the specifications?
I have recently bought a DC socket similar to the one below:
https://de.aliexpress.com/item/32681671586.html.
It is only used as a plug to connect a small circuit with a heating wire so there are no ...
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Why is power specified in watts rather than amperes?
This probably has an obvious answer I'm missing, but searching the web only gave me information on how watts are defined, not why we use them.
Many electric appliances (from things used to build ...
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Audio transformer power level
I am going to use SP-69.
https://catalog.triadmagnetics.com/Asset/SP-69.pdf
Its power level is 50mW.
I am going to use DRV135 to drive audio transformer(SP-69).
Output voltage of the DRV135 is 7Vrms(...
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197
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reading specification sheet of a cable
I'm having trouble reading the following specification sheet: https://www.molex.com/pdm_docs/ps/PS-15166-001-001.pdf
if it doesn't work, I just pressed the datasheet button in this product:
https://...