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

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How do I find the maximum surge current of a zener from the given thermal resistance curves?

I'm driving a MOSFET, and I want to protect its gate with a zener diode. Here is the MOSFET data: ...
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0answers
51 views

Reserved address in the MCUs datasheets [duplicate]

Why some addresses and bits of registers of microcontrollers are reserved? What is the difference between the reserved and unused addresses? Does the reserving affect cost of design and production of ...
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1answer
50 views

Which one of these transistors is equivalent to 2N918 NPN?

This is an FM radio receiver. Q1 is 2N918 NPN transistor but it is not available for me. Which one of the following transistors is more equivalent to Q1 ? BC547 TL431 s8550 s9014 2n5401 ...
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2answers
68 views

STM32F103 - TIM5 doesn't exist on medium density devices ? How do I tell what else is missing?

I've tried setting TIM5 as a timebase timer with an interrupt, when the compiler gave me the following error: 39: error: 'TIM5_IRQn' undeclared (first use in this function) Than I though I'll ...
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1answer
57 views

Driving 259mA stepper motor with a 2N4401

A while ago I asked a question about driving a stepper motor using a 2N5550 and was advised that it wasn't really capable/a good idea. I received a good answer but would like a bit more information ...
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2answers
94 views

Panasonic Eneloop BK-3MCC (4th gen) - where I can find maximum discharge current?

Im looking for some official information source about maximum current for Panasonic Eneloop BK-3MCC rechargeable batteries. All I found is single page data sheet, there is just 1 table (nothing about ...
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2answers
145 views

What does 25°C mean on a transistor data sheet?

The background is, I'm trying to understand how well a typical transistor obeys the Ebers-Moll equation at constant (junction) temperature. See this snapshot taken from the Fairchild datasheet of the ...
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1answer
22 views

Pinout for EA-X40027AR

Can anyone show me a pinout for the Character LCD EA-X40027AR from EPSON? I've already found a datasheet but it has no pinout...
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1answer
50 views

Unusual Lemo PCB sockets (male PCB contacts, 2-pin 5B, etc)

I am trying to construct a comprehensive Kicad library of Lemo connectors. While working through the "normal" datasheet (unipole_multipole.pdf), I found several combinations appear to be missing. For ...
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1answer
35 views

What is bus hold LOW or HIGH current refer to in the data sheet?

What is bus hold LOW or HIGH current refer to in the data sheet? (Specifically looking at this data sheet for a translator buffer): http://www.nxp.com/documents/data_sheet/74LVC_LVCH2T45.pdf
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1answer
72 views

2N7002 Continuous drain current?

I'm currently looking for some MOSFET's to do some RGB LED lighting with using PWM. I found the 2N7002 in SOT-23 packaging (datasheet). According to the datasheet the MOSFET can handle a continuous ...
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1answer
58 views

Using PS2501A-1-A Optocoupler. Need help understanding datasheet

I'm experimenting with circuits to trigger my camera shutter and camera flash. My plan is to build a 2-stage trigger for high speed photography that triggers the camera a fraction of a second before ...
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3answers
86 views

Alien circuit component

I am modeling chip ‍MC14538 in PSPICE by building its internal circuit from the datasheet. I, however, can't figure out what ...
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1answer
115 views

Transistor letting 12Volts through collector->emmiter withouit being damaged

I have made a simple digital amplifier using 2N4401 Philips switching transistor. simulate this circuit – Schematic created using CircuitLab I have tested this amplifier on 5 VDC and it ...
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2answers
48 views

Need help finding datasheet for Mitsubishi Electric AA11SB6C-ADFD TFT

Searching datasheet for Mitsubishi Electric AA11SB6C-ADFD LCD display. This LCD is discontinued product, no information on official site. Already tried sites like datasheetarchive, alldatasheet. Still ...
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0answers
70 views

Can't find Broadcom BCM4329 datasheet

I need to find information about my phone energy consumption and I can't find a proper datasheet about the BCM4329 chipset. Does someone have it? I'd like to create a power profile for PowerTutor in ...
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5answers
214 views

Which parameters in datasheet give information about a BJT's step response quality?

I did a test with randomly chosen 12 NPN BJTs. I applied a clock pulse to each of them and observed their collector voltages. Some of them showed very low rise time, while some responded terribly ...
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0answers
91 views

Interpreting Data Sheets (“Typical Applications”)

I've recently been researching various transceivers, but I run into trouble as soon as I get to the "typical applications" section of the data sheet. With the Si4464 for instance, the example ...
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2answers
86 views

Regarding miniature solar panels

I am a bit confused. I want to buy a miniature solar panel like this. The problem is that all the miniature solar panels online in their specifications they give the peak voltage and peak current. ...
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0answers
24 views

Current consumption estimate for frequency dependent specification

I am carefully calculating current consumption for current budget limited device. Certain switching devices such as integrated opto-isolator gives current consumption specification in a form of X ...
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1answer
75 views

Datasheet of an unknown IC

When reading the Platinum Resistance Thermometer Manual, I was faced with this unknown IC (see pp. 38 from the manual): I searched the web with the following keywords: ...
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1answer
61 views

How do I use the measurements from the datasheet to create a footprint?

I'm trying to make a footprint for a MPU-6050 6-axis gyroscope and accelerometer. I've added the first 12 pins (out of 24), but now I don't know how to proceed. I've added pin 1-6 and 13-18 but I ...
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3answers
241 views

Need help finding datasheet or pinout for Toshiba TCD2907DG

I really want to play with Toshiba TCD2907DG - this is color linear CCD sensor. I've found a number of datasheets for other TCD*, but not this one. I would really appreciate any reference to ...
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1answer
66 views

Am I interpreting this relay pin diagram correctly?

I'm using a relay for the first time and am unsure if I'm interpreting the pin diagram given in the datasheet correctly: I know a SPDT relay should have five pins: ...
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1answer
47 views

Avalanche Photodiode Current Gain

I'm designing a readout circuit for an APD manifactured by Hamamatsu Photonics (datasheet). However, I've found myself lacking some information about exactly how would the device behave in my ...
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2answers
58 views

Finding required maximum current rating for a diode which will run in PWM mode

Consider a diode rectifier which will transfer a PWM signal. The duty cycle rate of this PWM signal is \$D\$ (\$0 \le D \le 1\$). The diode on state current is \$I_{ON}\$, and no current will be drawn ...
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2answers
54 views

Extra pins on HD44780 lcd

I am looking at ordering this lcd https://www.sparkfun.com/products/255, however when looking at the picture it seems that there are some extra pins on the right side not described in the hd4470 ...
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1answer
34 views

What is the ALS and BLS pin for on the ISL83204A full-bridge driver chip?

The datasheet for the ISL83204A full-bridge driver chip documents "low sense" pins that connect to the source of the bottom N-channel MOSFETs. As those are typically connected to ground, what is the ...
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1answer
131 views

How these circuit diagrams in the datasheet was made? [closed]

I've seen so many IC datasheets, and so appreciate the elegant reference circuit diagrams they've made. I'm not meaning the 'function' of the circuit, but the 'beautiful' schematics itself, such as ...
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1answer
76 views

How to use MOSFET thermal data for simulating in software

I have a MOSFET (irfb7434pbf) acting as load switch in a circuit. The usual operation is well within the SOA region, but, on situations where the load would short circuit, the MOSFET is set to limit ...
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1answer
118 views

Help me understand this shift register timing diagram

My basic understanding of using a shift register to convert serial to parallel data is this: On every clock pulse, the state of the serial data pin is read As data is read, it gets shifted in to the ...
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0answers
157 views

Finding/figuring out pin configuration on undocumented components

I recently purchased an assorted set of LCD/LED displays, and inside there were a set of components which I cannot find a datasheet for upon googling the component number. For instance in the ...
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1answer
78 views

How to interpret this data sheet?

I'm really confused understanding the following device manual:https://www.endevco.com/product/prodpdf/136.pdf I don't understand most of what they write. Any one has some idea about these terminology? ...
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736 views

How to read Scaled Graphs?

Please ignore the graphed lines, those are irrelevant to the question, it's the graph itself that's relevant. I see this type of graph used all the time, between ...
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1answer
88 views

how to calculate Ic as the current through the collector and function of the transistor

I am going through this tutorial, they state that "Ic is the current through the collector and function of the transistor" however I haven't really been able to look at the data sheet and figure out ...
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3answers
156 views

Reference to understand LED data sheet specification, characteristic and way to use them

I'm trying to build my own IR-led light with multiple LEDs. I've bought a TSAL6100 IR led but I'm not sure how to interpret the data sheet, I can't find any reference in internet. Can anybody tell me ...
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1answer
170 views

Understanding 74LVC245 datasheet and current source/sink

I'm using a SN74LVC245A (datasheet) to shift 5V TTL down to 3.3V so I can read the signals with a Raspberry Pi. However I am getting really weird results (a 60Hz input signal is picked up by the Pi ...
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3answers
96 views

Will this relay handle my current and voltage requirements?

I have this relay: SONGLE SRA-24vdc-cl I want to use it to run 240V 11A device. I can see in the datasheet it can be up to 20A (section 7, line 4-5), but the relay is so small and its legs so ...
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1answer
156 views

Where to find I2C register information for MAX21000+?

The datasheet for the MAX21000+ IC contains a table listing all of the registers and their default values but doesn't include any description of each of the register bits. I assume there must be a ...
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3answers
37 views

Find product lead dimensions

I am building a project for a robot on breadboard, and I have come across the need for a voltage regulator. I have an existing voltage regulator, but it will not fit into the holes on my breadboard. ...
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3answers
121 views

How to find info on part efficiently?

I'm not exactly a novice to electronics, but my problem is closely related, and I still feel like a complete newbie at those times. I have no problem sourcing parts for new projects. Part of that is ...
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3answers
102 views

LTC2485 I2C Data Format

I am trying to understand the I2C data format of a 24 bits ACD (LTC2485). The data sheet says it returns 4 bytes (32 bits integer), but is unclear as to where the 24 bits I seek are located. Here is ...
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2answers
85 views

How to connect AFC terminal on Crystal Oscillator

I'm thinking of using a Temperature compensated crystal oscillator in my next project, specifically the TXC 7L-38.400MBS-T This device has an AFC (Automatic Frequency Control) terminal, but no ...
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1answer
99 views

Does SAM4S have FPU onboard?

While trying to use Atmel's ASF library, they say __FPU_PRESENT: Initialize macro __FPU_PRESENT = 1 when building on FPU supported Targets. Enable this macro for M4bf and M4lf libraries ...
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2answers
212 views

MOSFET Difference between Normalised On Resistance and Output characteristics

In the datasheet for STP36NE06, it has two graphs which seem to contradict each other: In the graph on the left, for Vgs=10v and ...
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3answers
162 views

I need a basic primer on interpreting vacuum tube datasheets

I am building a prop for a film that needs to have a bunch of glowing vacuum tubes on it. Unfortunately, beyond basic "valve theory", I'm not finding a lot of information about how to interpret the ...
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1answer
231 views

Does anyone have a datasheet for this Arira LCD?

I emailed the manufacturer but they haven't responded to my email. I received this LCD screen in a grab bag from Jameco. Googled for a while and couldn't find anything related to the pinouts of this ...
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1answer
188 views

Is there a difference between TI brand of the 74HC595 and the NXP brand?

I have been trying to figure out the functional differences between TI's version of 74HC595 and NXP's version. I've been looking at the function tables in the datasheet for TI and the datasheet for ...
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1answer
105 views

transistor characteristics - Ube0 number meaning

i'm trying to guess meaning of value marked as Ube0 in datasheets. (datasheet adress: http://www.datasheetarchive.com/dlmain/Datasheets-36/DSA-700258.pdf, the transistor I want to use is Tesla ...
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1answer
582 views

Where can I find the datasheet for an DGL-0401YG-4EH LCD display

I recently bought a "goodie bag" or whatever it is called with a lot of different displays in the bag. I figured it could be useful someday or just to play around with. However it seems that the ...