Cheapest USB microcontroller?

Does anyone know the lowest cost microcontroller with a USB interface?

I have done some Googling, and it seems there are quite a few USB microcontrollers based on either ARM or 8051. Either is okay, but they are not very cheap. They are all over $3 @ qty 1000.

The cheapest I have found so far is the Atmel AT90USB82, which is an AVR. It is just under $2 @ qty 1000.

Here is what I need:

Essential: USB (low or full speed) Cheap 10 I/O (8 outputs, 2 inputs) >= 1k program memory >= 256 bytes non-volatile data (eg EEPROM)

Nice to have: UART Integrated Oscillator Very low power sleep mode Small package

Not needed: High-speed USB Fast CPU

If anyone has any other suggestions, please let me know.


Reply to
Loading thread data ...

You could take a look at your computer mouse. My Dell mouse has a CY7C63813, which you can get for $1.84 for 410 units:

formatting link

It doesn't have EEPROM, but you can re-program flash blocks from the firmware. USB is low speed, only. It has 8k flash and 256 bytes RAM.

Frank Buss,,
Reply to
Frank Buss

Depending on quantity Cypress M8A and M8B parts used in mice and keyboards. reasonable 8 Bit processor and good reference designs. I am biased we wrote the C compiler for the two parts families.


-- Walter Banks Byte Craft Limited

formatting link Canada

Reply to
Walter Banks

Your need for EEPROM narrows the field considerably. Flash is nearly universal in MCUs, but EEPROM is much less common. Is this actually required? Can it be added externally? I expect it is a cost issue, but you need to compare MCU with EEPROM cost vs. MCU + EEPROM cost. You may be able to do better using a separate EEPROM.


Reply to

there exist china made usb flash micros with 1.0 usd cost, but they arent easy to get

1.84 is already not so bad

i did recall c8051f326 pricing 2.36 usd but digikey list a bit more so you maybe cant get at 2.30 they are nice as they have onchip oscillator and run FS not LS like the cypress cheap things i also considered myself once the USB82 ,but eh the last penny is not always worth saving also if you need add crystal :(

so if you can use LS use the sub 2 usd cypress LS chip


Reply to

Microchip has $2.12

Reply to

If you only need low-speed USB, you can do it in software on an ATtiny:

formatting link
Presumably this would let you shave a little off the MCU cost, but the USB implementation licensing might eat up that advantage.

   Wim Lewis , Seattle, WA, USA. PGP keyID 27F772C1
Reply to
Wim Lewis

ElectronDepot website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.