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Microcontrollers and digital systems
Great day folks, I want to make a bidirectional voltage translator of 3.3V 5V since I will work with a Bluetooth module HC-06 that works with 3.3V and synchronize it with an MCU that works with 5V to interconnect different smart devices, so I want to find a CI that manages good current levels and helps me to optimize my information management between the HC-06 and the microcontroller.
I looked at a module that I already sell on the web (See image), but I am only interested in the IC for me to make my bidirectional voltage level translator, so I want to know the model or part number for me to buy it directly from the manufacturer.
For your attention thanks.
PS: Look at the bidirectional translator of OPEN-DRAIN, I don't know what they can tell me about that or if they have used any that they recommend.
Bidirectional voltage level translators 3.3va 5v
2
hace 6 años
hace 6 años
2
hace 6 años
I have no idea why not look but there is the link where the bidirectional level translator is shown which I know the model or part number of the integrated that it brings to be able to buy it, my friend, I hope I can enter the link.
https://www.banggood.com/en/100pcs-3_3V-5V-TTL-Bi-directional-Logic-Level-Converter-For-Arduino-p-1389548.html?gmcCountry=MX¤cy=MXN&createTmp=1&utm_source= googleshopping & utm_medium = cpc_union & utm_content = 2zou & utm_campaign = ssc-mx-es-all & gclid = CjwKCAiA2fjjBRAjEiwAuewS_d7t_D2hE4QCMDIU67aBxpCS7AdDLQAWD_WAQWAWDW6CWDWA0WXWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWHWHWHWHWHWHWHWHWWHWHWHWHWHWHWHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHR
2
hace 6 años
Jorgeal friend, I hope I can see the image, I know the model or part number of that small integrated that brings that plate, I am only interested in that same integrated, or some similar that I recommend.
EYE: The module itself "I am not interested" only the integrated circuit that brings the board. since it has as numbering (j1J) and there are others like (J1H) but I can't find them like that anywhere to buy them, I necessarily occupy the model or part number.
17.055
hace 6 años
hace 6 años
They are not integrated circuits are Mosfet transistors that make level adapters and it is impossible to get the cheapest materials that are worth the modules already made at least here.
The electrical scheme of each of the adapters is this one here.
Regards.
Ric.
-------------------------------------------------- -------------------------------------------------- -------------------------------------------------- -------------------------------------------
The marking information on the SMD transistor as J1 is in its data sheet.
Regards.
Ric.
-------------------------------------------------- -------------------------------------------------- -------------------------------------------------- -------------------------------------------
The marking information on the SMD transistor as J1 is in its data sheet.
17.055
hace 6 años
Buffer or separator is called any stage with unit gain or close to it that is intended to separate stages that may be sensitive to load variations (impedance), etc. They can be done with different components as required, but for what you want, the practical advice is what you showed yourself.
2
hace 6 años
Exact friend, thanks.
Excuse me, I want to see since I've been reading Bi-directional level shifter for I²C-bus and other systems Application Notes. AN97055
And on page 10 I found the scheme that showed me above with the MOSFET BSS138, and I want to know if I can somehow simplify that circuit, I don't know, that it doesn't necessarily put any resistance.
17.055
hace 6 años
The scheme that passes is recommended in the application notes and used by the plates shown above. It has the minimum necessary and necessary and you can not remove anything else. I do not know what you want to invent / do but that is what goes, then everyone is lord of doing what they want and deal with the consequences as in all orders. The advantages of what has been shown is that it is already proven that it works and that it does not burn anything, the experimental is a doubt as to what can happen / break. Luck. Ric.
2
hace 6 años
I have read that maybe if a device does not use an open gate, a resistor can be removed since it will not be indispensable for the circuit function.
But yes friend, there I will try to do an experiment to see what comes out xD, thank you very much for your help that certainly supported me a lot.
2
hace 6 años
haha if, in effect, sorry I wanted to put in relation to a transistor of logical level translator, as I have been reading the application notes I was referring to a transistor with "Open Drain" that perhaps in the arrangement that shows the "Application Note "If it is possible to remove a resistor from the VDD1" Lower Voltage "side and minimize the circuit a little by using a transistor other than" Open Drain "
17.055
hace 6 años
If the device you are going to use has the logical state set to high at 3.3V or 5V on its pin with some internal or external PULL-PU, you may not connect the LV (3.3V) or the HV (5V) resistor since the transistor will take said state by the PULL-UP of the PIN in question. The resistors are to set the high reference level corresponding to each logic both at the input and at the output. If the devices to be interconnected are already redundant, if you do not place it and the device does not have it, the level transfer will not work.
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