Questions tagged [datasheet]

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

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Why does LM386 datasheet indicate a recommended operation conditions of +/- 0.4V for Vinput, which is also the abs max rating of that input?

Why does the LM386 datasheet indicate a recommended operation conditions of +/- 0.4V for Vinput, which is also the abs max rating of that input? I thought that absolute maximum ratings should be ...
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How to connect dissimilar but close logic voltages between a chips logic out and a chips input enable pins

I have two chips and I would like the logic out of one chip to control the chip enable pins of another chip. I am just not sure how to do it. I have a chip with an output of 3.6v with logic on and -1....
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-1 votes
1 answer
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What capacitor is this (part number)? Looking for the datasheet [closed]

I'm trying to find the datasheet for this 1.0F & 5.5V capacitor. Some identifying labels on it are "GC", "Japan", and "822". I haven't had luck in my googling, so ...
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2 votes
2 answers
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Designation "2-" in a technical drawing of a component

What does the encircled "2-" designate in the technical drawing below? Is it some standardized/common designation of something? "R" stands for the radius, and the numbers refers to ...
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1 vote
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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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0 answers
36 views

Datasheet VN2222

I couldn't find the datasheet for VN2222 I need it to find Vt, Cox, W, L to evaluate the current ID. All I found is VN2222l which is not what I want, or do they have the same characteristics?
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0 votes
1 answer
41 views

Help solve rds for pchannel FET from this datasheet

I would like to use a pchannel FET as a voltage controlled resistor in a circuit where my voltages are between 0 and 1.1 Volts. I'm hoping to use the J175 but truthfully I am having a difficult time ...
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2 votes
1 answer
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Button contact ratings

Inside an enclosure, a device is powered by an SMPS as follows: The device operates under 12 VDC and sinks 6 A from the SMPS. The SMPS is wired to AC by an IEC inlet. Now I want to install an ...
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3 votes
3 answers
585 views

Operating above maximum characteristic supply voltage, but below absolute maximum voltage

I'm using an Alliance parallel SRAM IC, and under the Electrical Characteristics table, it says VCC can be min 3.0 V, max 5.5 V. In the Absolute Maximum Characteristics table, it says terminal voltage ...
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  • 189
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3 answers
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DPDT relay datasheet

I'm looking for a 5 V relay, low current (Arduino)- DPDT and I found chinese one - RY5W-K in Aliexpress I'm trying to understand the pinout schematic: where is the ...
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5 votes
2 answers
121 views

LM10 schematic transistor symbols

I'm trying to figure out what certain elements of the transistors from the schematic in the LM10 datasheet represent and I hope someone can help. In the attached image I have several questions: In ...
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-1 votes
2 answers
89 views

Help me find the datasheet of a component (547 T518A)

This is a picture of a component its designator is 'Q1', so it would be a transistor, but I couldn't find it on the internet:
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2 answers
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A question about gain setting of a DAC versus its supply voltage

I want to power this DAC chip with 3.3V using its Vdd pin. If Im not wrong, specs says nothing about output voltage vs supply voltage Vdd and the following formula is given: The chip uses a fixed 2....
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2 votes
1 answer
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Selecting transistor base resistor for LED switching application based on datasheet

I have been trying to understand how to read a transistor datasheet properly, and to apply the ratings into my circuit to be able to calculate the needed resistor on the base leg. I have a basic setup ...
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0 votes
1 answer
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How to reduce the delay between GPIO pin state and SPI transmission?

Below shows SCLK, MOSI and CS(\SYNC) lines for my SPI from a logic analyzer: I use a Nucelo board as master to control this DAC(slave) via SPI. I didnt receive the DAC yet and trying to set the SPI. ...
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  • 1,097
0 votes
3 answers
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Problem with finding DNL and INL of a DAC from its datasheet

Regarding my previous question I'm interested is the error between consecutive step sizes of this DAC. I need to know DNL and INL of this DAC. I searched for keywords for INL and DNL in the datasheet ...
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  • 1,097
0 votes
1 answer
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What is the maximum safe SPI baud rate for this DAC?

I'm trying to communicate with this DAC as quick as possible with a microcontroller board, and need to figure out what baud rate would be its maximum limit. There's 50MHz mentioned but I'm not sure. ...
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0 votes
1 answer
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What is the Test ID number of the USB7216 USB Hub chip

I am using the Microchip USB7216 USB 3.2 Hub chip in my design. I would like to know the TID number of this part. I have looked in the datasheet, on the manufacturer's website, and the internet in ...
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2 answers
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Datasheets, dimensioning questions

I have a problem reading this datasheet. This one is very weird, does 3-1.5 mean that pin is 3 mm wide, and 1.5 mm is meant to be a radius, or does it mean 1.5 mm and that that 3 means three pins? ...
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2 votes
2 answers
306 views

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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6 votes
2 answers
287 views

Trouble reading a variable inductor (tunable RF coil) datasheet

I have a trouble reading this datasheet for the Coilcraft 7mm Tunable RF Coils – 146, 150 Series. I see there are two main types of such inductor: with shield can and without it. I'm going to buy one ...
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0 votes
2 answers
92 views

Very confused with a DAC's SPI protocol

This DAC is controlled by SPI interface. And requires two bytes to write data to one of its registers. Below showing that the first byte is "register index" and the second byte is the data. ...
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  • 380
0 votes
1 answer
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Help understanding FPGA dimensions

I need some help understanding the dimensions specified in the datasheet of an FPGA. I am trying to figure out the pad/ball dimensions. From looking at the schematic, it looks like theta_b is the ...
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0 votes
0 answers
32 views

Reading sensor data - help with timing chart

I am reading data from a C12880MA mini-spectrometer from Hamamatsu, I am having a bear of a time understanding their data sheet. I am able to read the data from the spectrometer, however I want to ...
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6 votes
3 answers
502 views

Why is the Base-emitter ON voltage as high as 2V in the BJT datasheet?

Below is a snippet from a BJT datasheet. Why is the Base-emitter ON volatge mentioned as 2V? The Base emitter voltage should be 0.7V when the BJT conducts.
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  • 2,051
0 votes
1 answer
96 views

How to connect Multi-Directional Switch in EasyEDA

I'm a beginner and I'm currently working on simple PCB with LEDS and Multi-Directional Switch in EasyEDA. The Switch is Korean Hroparts Elec K1-1505UA-01 https://www.lcsc.com/product-detail/Multi-...
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-1 votes
1 answer
20 views

Info on STA509A MOSFET Array

I am trying to find information about the different variants of the STA509A MOSFET Array. The only datasheet I can find is a one-pager that doesn't have any details about the different variants. As ...
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9 votes
3 answers
2k views

What are these extra pins? (stereo jack connector)

I was looking at 3.5mm stereo headphone jacks on Digikey and saw this part that piqued my curiosity. I do not understand the function and connections for pins 4-9: The red-circled part is the one I'...
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  • 919
0 votes
2 answers
58 views

LM139AD Comparator Negative Inputs

I am wondering if the LM139AD comparator from TI can tolerate negative voltages at its inputs. I see that it can operate from a dual supply and that a supply rail can be negative? Is the same true for ...
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0 votes
3 answers
102 views

Help with comparing opamp noise specs [closed]

I need a DIP package quad opamp which has better output noise than LM324, anything less than 5mV output noise floor would be great. I could only come across with the following: LM324: https://www.ti....
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  • 3,340
0 votes
1 answer
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Confusion with analog input range spec from a manual

Looking at this manual of a galvo-mirror device, I'm confused with relating the analog inputs to angle range. It is written in the manual: ...
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  • 380
0 votes
2 answers
71 views

What are the numbers after the hyphen on an IC?

I am new to electronics and picked up some older ICs to learn more about them. I came across one with the following serial number: MR53V8052J-77R I did some ...
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1 vote
1 answer
46 views

VOH vs CMOS VOH

I'm new to circuit design. I'm trying to design a clock for a circuit containing 8 SPI to CAN devices. However, I'm not sure if it's possible with a single clock (perhaps this reference). As I'm not ...
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1 vote
1 answer
68 views

Am I reading this data sheet wrong for ceramic capacitor value?

I am using the k7805 DC/DC converters from morson for my project and I’m struggling to find correct ceramic capacitors. Also on the data sheet in fig 1 it shows polarised capacitors but I didn’t think ...
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0 votes
1 answer
55 views

How to get power consumption from datasheet

I am using this stepper motor on my project and am trying to pick a power supply that will be able to supply enough current to all of my components. Looking at the datasheet I'm not sure whether to ...
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0 votes
1 answer
98 views

Are AO3400 MOSFETs good for my LED strip 'project'?

I read a lot about MOSFETs, but since I do not have much electronic background most official 'notes' are quite above my knowledge. So I hope someone can beware me of making some trivial mistakes. Why ...
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0 votes
0 answers
36 views

Purpose of 'Boost clamp functionality' in this buck converter

Going over this buck regulator: https://www.onsemi.com/pdf/datasheet/ncp3011-d.pdf To break the question in 2 parts: I am not sure I fully understand what the purpose of it is? I need a supply at ...
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  • 539
0 votes
1 answer
49 views

Does a 'X' in a 'Suggested Connections for Unused Pins' table on an IC data sheet mean yes or no?

On table 2, page 6 of the datasheet for the ST VN5E160MS-E Single-channel high-side driver the manufacturer provides guidance on what to do with unused pins on the IC package. Instead of a text ...
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0 votes
0 answers
101 views

Help in identifying IC

I'm trying to identify the 16 pin white IC shown in the picture but I couldn't find any IC with marking code similar to that. I'm not sure but the board which IC is assembled on may be related to a ...
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  • 19
1 vote
2 answers
65 views

Confusion with a parameter definition from a datasheet

I want to increase angles of this galvo scanner step by step like 50 mV at 20 kHz (my desired galvo step movement frequency). So each 50 μs the galvo should increase a small angle. I cannot relate the ...
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  • 3,340
0 votes
1 answer
46 views

How do LDMOS datasheets label current draw through the gate?

I'm trying to figure out how much current is required to bias a FET's Vgs so I can choose a DAC to set the gain. If I understand correctly, very little is required, but I couldn't find something ...
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1 vote
1 answer
47 views

What parameter dictates the analog output speed for this board?

I plan to use this I/O Device for a project where the the analog output should be able to settle to a value for a 100 kHz moving point scan device. Meaning that between point A and point B the analog ...
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  • 1,097
0 votes
0 answers
33 views

Can I and how I use datasheet registers to activate scaling up on the RTD2660 display controller?

I have a chinese display with hdmi driver board using RTD2660 controller chip. I want to use it to mod my Playstation portable with a bigger screen, but the problem is that psp outputs image with ...
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1 vote
1 answer
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Absolute Maximum logic voltage best practices

I'm interfacing a PIC24FJ MCU along with a Microchip BM83 BT module. The absolute maximum ratings for the "logic high" level show 3.6 V (with 3.3 V as nominal) on any given I/O port of the ...
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  • 461
0 votes
3 answers
140 views

Do TVS diodes have polarity?

I am making a USB to UART circuit for ESP32. Why does the LESD5D5.0CT1G datasheet show a polarity marking? Aren't TVS bidirectional? What is the right position for such a diode? My circuit:
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0 votes
0 answers
56 views

Which (Zener-like) component does this diode-like symbol represent? [duplicate]

I recently stumbled upon a TI datasheet (TPIC6B595, a 595-like power shift register) where they use a diode-like symbol I've never seen. Datasheet excerpt, figure 13 at p.12 (yellow emphasis mine): ...
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2 votes
1 answer
43 views

LTC3612EFE vs. LTC3612IFE

I am unable to figure out what difference is between the following part numbers, poring over the data sheet has shown no discernable difference and/or no mention of what the suffixes mean although ...
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2 votes
1 answer
309 views

Where can I find the datasheet of LT706?

I found this Linear Technology chip with the marking "LT 706 4851". Does anyone know what kind of chip this is and/or where I can find the datasheet? I suspect it is in a SOIC-8 package and ...
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1 vote
2 answers
53 views

DC power supply rejection ratio definition in datasheet

Let's think DC only (no AC ripple) An op amp datasheet says the PSRR for Vs = ±3V to ±18V is 120dB. I understand that if Vs+ increases by 1V and Vs- decreases by 1V, the input (when RTI) will increase ...
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0 votes
1 answer
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How to trace and find the clock of a certain USART for this board?

I'm having trouble to trace and find which clocks clock USART2 and USART3 ect for a uC board. I looked at clock tree and block diagram of the board but cannot find a hint. I checked both the reference ...
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