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.

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2answers
429 views

Why is the Active/Real Power Rating So Low for This Relay?

I'm trying to select a relay for a IoT project that will control a water boiler. I took a look at the HF32F-G relay, but some of the specifications in the datasheet weren't making any sense to me. ...
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1answer
52 views

DS1302 maximum current source/sink?

What is the recommended and maximum current sourcing and sinking capability on the DS1302? Is this what's given by "Active Supply Current" in the spec?
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1answer
263 views

Is it not recommendable to use a spectrum analyzer in its limit frequencies?

Suppose we have a spectrum analyzer whose range of frequencies goes from \$x \ \mathrm{Hz}\$ to \$y \ \mathrm{Hz}\$. Is there any problem that could arise from measuring signals that are near those ...
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1answer
160 views

Compatibility of an LCD module and a connector

I want to realize i2c communication myself using Raspberry Pi and a LCD module. I am reading documentations to find an appropriate connector but I am a bit confused and I need help. Here is the LCD ...
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2answers
349 views

SD card speed class specifies “minimum sequential write speed” but not the “maximum sequential write speed”, why?

A speed rating for any memory device is usually how fast it can work. However, the speed class of SD cards actually specifies the "minimum sequential write speed". Please see here for evidence under "...
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1answer
173 views

What are disadvantages of using SD card SPI mode besides reduced data rate?

The "SD Specifications Part 1 Physical Layer Simplified Specification Version 2.00" states on page 93: The SPI standard defines the physical link only, and not the complete data ...
-2
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1answer
73 views

Battery Pack Life Rating

I am working off of a schematic where I was given a battery pack with the following specifications. The battery being used is a panasonic NCR18650 lithium ion cell. https://engineering.tamu.edu/media/...
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0answers
49 views

TCXO specification ambiguity

I am going through datasheet of TXKTPCSANF-32.000000. I require a clipped sine-wave TCXO with 1.8 Vpp maximum. However, the datasheet of the TCXO doesn't state the ...
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1answer
1k views

Linear and non linear phase FIR filter

I am a confused about linear and non linear fir filter. I have this depiction of the solution space for linear-phase and nonlinear-phase FIR filters for a given set of specifications. Region 1 ...
2
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2answers
368 views

What specifications matter when comparing TVS ICs?

I have been wanting to update a design I have to include a USB to UART Bridge and while looking at the datasheet for the CP2102N saw what is in the image below. I have never worked with a TVS before ...
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2answers
1k views

Does an official I2S specification exist?

So, is there an official, preferably up-to-date, specification of the I2S bus, and if yes, where can one obtain it? I've spent some time searching through NXP's website and couldn't find anything. ...
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2answers
17k views

What is the recommended fully-charged voltage for NiMH AA batteries?

I have done research on different batteries and cannot find a maximum OR minimum voltage to keep NiMH AA batteries within. It seems that typically battery chargers will measure the negative voltage ...
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1answer
39 views

Can power specs be used without extending the margin to account for losses?

Looking generally at the 74FCT family, I saw that it's power pin should be held at \$5V \pm 5 \%\$ to be in specs. From my understanding, \$\pm5\%\$ power supplies are widely available, but are the ...
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3answers
129 views

Operational amplifier bandwidth - why does manufacturer tell it's DC when it is not

I've been working with op amp datasheets lately and i noticed strange thing with RF amplifiers specifications. I will provide one example, but there quit more of them with this manufacturer. ...
5
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1answer
2k views

What is the usable area (for connectors) of a PCI Express card bracket?

I have a number of awkwardly shaped connectors that I need to cram into a single PCI Express slot metal bracket without any of them colliding with the host PC case's metalwork. The connectors are a ...
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2answers
2k views

Can you safely exceed the nominal voltage of a supercapacitor?

From what I found the data sheets usually only specify the nominal voltage, not Absolute Maximum Value or similar. I need to use supercapacitors for a project where they will run for a total of ~20 ...
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1answer
79 views

Component ID: AA3 03

I'm trying to identify a fault on a printed circuit board in a consumer product. So I tried to find a pin-out diagram, specifications, etc. for this surface mount component designated AA3 03: There ...
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1answer
46 views

Understanding a motor's specs

I'm trying to understand the specifications of a brushless motor which I would like to buy for making an E-bike. Here are all the specs if have about the motor I'm interested in (copy-pasted from the ...
8
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2answers
928 views

Is it possible for an opamp to oscillate at a frequency greater than its GBP?

I was installing a tl3141 into a headphone amplifier circuit and it appears to break into ~250mVp-p oscillation at 8-10MHz on the lower half of the waveform when fed a 1kHz sine wave. Is that even ...
0
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1answer
687 views

Identifying and specing an Inductor [closed]

I have a circuit board with a surface mounted inductor which I believe is a film inductor. The board is not working properly and there is a loud squealing sound coming from said inductor so I am ...
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2answers
109 views

What do the specifications of this RF power meter mean?

I am looking for RF power meter to measure the output power of RF based PCB board which is estimated to give an output power of 45dBm at 868MHz. While searching for meter I have come across ...
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2answers
5k views

Input leakage current

In the datasheet (like http://www.mouser.com/ds/2/149/NC7SZ125-98364.pdf), there is a spec of input leakage current ( +/- 10uA in this case). I'm wondering about this current. Is this current flow ...
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1answer
105 views

Understanding LED specifications (hobby kit)

I have an LED that looks like: It did not come with specs for the LED. In laymens terms, I'm trying to determine the technical term for the following descriptions. (What is the max amount of current ...
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2answers
206 views

What does the term 'min' mean in AAA Rechargeable cell current capacity?

While checking the specification of rechargable AAA Ni-MH cells, the specification shows 2 parameters Voltage say 1.2v and Current Capacity say 630 mAh. However the current capacity is preceded by '...
2
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2answers
94 views

How can I tell if a cable is rated for use as motor leads with a variable frequency drive?

I understand that the switching edges generated by a VFD can cause corona breakdown of the insulation on the motor leads. Due to this, it is recommended that some cables be used for VFD motor leads, ...
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4answers
1k views

diode selection for large current reverse bias, small current forward bias

I'm designing a circuit where I want to pass a small test current from one leg, but block a large "firing" current (rocketry) coming from another leg in reverse bias. I have a 5vdc indicator line (...
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3answers
167 views

a standard method for flowing down EMC/EMI requirements to internal modules

EMC/EMI standards (conducted/radiated emission/susceptibility) are well established for system boxes. However there appears to be no standards, nor methods for deriving a specification for internal ...
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1answer
92 views

Is it possible to approximate specs of a LED?

I am thinking about gutting a few infrared LED's from some old remote controllers and using them as part of a battery powered wii sensor bar. Obviously, I do not have the spec sheets for these LEDs, ...
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0answers
55 views

What happens when the chip enable active time limit is exceeded?

The datasheet of a FRAM chip (FM1608-120-P) says that "the device has a maximum /CE low time specification that must be satisfied". The datasheet does not state what the consequences are when this ...
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2answers
639 views

Peltier Module/TEG specs explainantion

I am looking for a Peltier module/TEG to power wearables and I'm not quite sure what specs I need or should be looking at. To be honest I am not quite sure what some of the specs even me. Essentially ...
2
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2answers
442 views

How many segments are permitted in CAT 6A cable run?

How many segments are permitted in an F/UTP CAT 6A cable run? Segment endpoints require peeling back the foil and untwisting the pairs, which I fear will affect data speeds. I heard that a cable run ...
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2answers
569 views

What is a zener diode's I_z rating?

I know that IZT is the test current at which the zener's reverse voltage is established. But what is IZ? (So I can enter the characteristics of one in CircuitLab.
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1answer
100 views

USB 3 to USB 2 Wiring

I have a USB 3 to sata connector which I know worked on my Raspberry Pi 3 (USB 2). I have now cut the USB 3 cable and wanted to solder the wires directly to the Raspberry Pi. This is so that I can ...
2
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2answers
3k views

What is meant by VCES in a transistor electrical specification?

I am studying the STMicroelectronic BUL216 NPN power transistor. Electrical specification like VCES is given by the Specification Sheet BUL216 Datasheet. Also, the VCEO spec. Both spec has to do with ...
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5answers
127 views

Why can optical usb cables not operate below 0°C?

The specifications of this optical usb cable specify operating conditions of more than 0 °C. What is the physical reason behind this?
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1answer
122 views

What chips does a Sony Ericsson (feature phone) use? (e.g. K510i, K610i, W705, C510) [closed]

I'm trying to replicate the behavior of these awesome Sony Ericsson phones by using Teensy 3.6 so I'm wondering what kind of specifications and chips do these phones have. The phones in question are: ...
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2answers
1k views

Are there open free USB designs?

I want to learn USB and its hardware interface and start with a trivial design. I found some VHDL in github for the ISP1362 and I wonder if that is a good starting point. I have already used Quartus ...
0
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1answer
263 views

Connecting Optical Fignerprint Scanner with Raspberry Pi?

I am new to electronics. I bought Rasberry Pi and a Fingerprint scanner for some project. Now I can't seem to find any details/Specification about the Fingerprint Scanner, and there is nothing ...
2
votes
1answer
4k views

Selecting a ceramic capacitor: Rule of thumb for required DC voltage rating

What is the rule of thumb for the DC voltage rating when selecting a ceramic capacitor (MLCC). Example: selecting a X7R decoupling capacitor, system voltage is 5V. Can I safely chose a capacitor with ...
0
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1answer
126 views

How To Check If An Oscilloscope Is DC Capable

I am busy working on some analogue synthesizers at the moment and just got the hang of OP-amp to some degree. I want to invest in a decent Oscilloscope something like 50Mhz-100Mhz. So based on advice ...
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3answers
1k views

Is there a standard stating how fast a fast fuse is, how slow a slow fuse is?

According to answers to this question there seem to be a standardized notation on fuses. For example F8AL250V means that it's a 8A fast fuse. On the other hand there is answers this question stating ...
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1answer
130 views

Does anyone have a manual or spec regarding an NEC JAPAN 45006705-210 0356MP010

As the headline states. It seems to be hard to get! The µC is in use in an Ferroli Arena A30 boiler. A datasheet could help to know how the pin configuration. A manual should even be more awesome. ...
2
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0answers
280 views

SATA compliance test

Is there anyone familiar with the SATA interface compliance? I'm curious about the testing method. For TX test, there are PHY/TSG/OOB test items. And, there are BIST-L and BIST-TSA mode defined in ...
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1answer
59 views

Am I exceeding a power supply's specifications?

I recently aquired an adjustable power supply and would like to know if its suitable for my project. It is a 300W power supply with the following specifications: Input voltage: 13V - 62V Max input ...
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1answer
954 views

Li-ion battery IEC 62133 compliance

Hei, Wondering if any of you have experience on secondary li-ion batteries (not battery packs) that comply with IEC 62133 certification? I can't seem to find abundant amount of batteries covering ...
0
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1answer
115 views

Spec sheet for a pulse generator: Interpreting current output

I am looking at the specifications of a device that produces a narrow pulse waveform, direct current, pulse duration < 1 ms, frequency variable from 5 to 500 Hz. The specs for this device say that ...
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2answers
653 views

what are the specs of a transistor that can't be find on internet?

It is part of a switching-mode power supply for a PC. There is a number: 1035 and a logo above this number, that seems to be a capital D. I am trying to find a replacement but it is not as easy as it ...
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2answers
2k views

How to work out how much pulling power an electric motor has in kg?

Say I have 5 kg mass on a spindle that has a diameter 5 cm and I want to move it up at 6 cm/s (just example numbers). How would I find out the specs needed for what electric motor I would need? I ...
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1answer
617 views

Exceeding the relay contact rating and connecting to Arduino

I have an Arduino. A suitable relay can be directly connected to an Arduino (with a flyback diode) if its coil is rated at 5 V and 40 mA maximum. However such relays have a limit on the ...
15
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3answers
4k views

Why do digital scopes sample signals at a higher frequency than required by the sampling theorem?

In the quest for a not so expensive PC scope/logic analyzer, I have found a nice little device it looks very well done and I know it will do the job. However looking at the specifications, I ...