Many microcontrollers from a decade ago use the 1.8V as the voltage for the CPU core even when using 3.3V for the I/O. Since the microcontroller needs both the 3.3V power and 1.8V power stabilized before leaving reset (the deglitch and delay block), the /reset from the 3.3V super and the /reset from this can be tied together to the /reset input of the microcontroller. And therefore only need 3 chips (2 regulators and the microcontroller) instead of 5 (2 regulators, 2 voltage supervisors, and the microcontroller) 🙂
I was just gonna ask... Where do we see 1.8 I've never really used it myself, and at one amp it makes sense because it's too much for LEDs, too low for audio amps but just about right for a small controller. This is exactly why I watch these types of things. A few minutes of my time, if I pay attention... Well it can feel like a time waste sometimes but actually what happens is I pre learn stuff then end up handily informed when I see it IRL
@@IMSAIGuy I was thinking of the atmel uc3 microcontrollers, and, more recently, the many chips with ARM Cortex-M0+ and 80-MHz clock speeds. They require the lower voltage for the CPU to avoid overheating because power scales with clock frequency and voltage (P ~ Fclk * Vcc^2)
I wanted to see when it dropped out of regulation.... Ok Fred...go look it up.. Nice to see a mosfet as the pass element... So maybe to maintain 1.8 VDC... Could it regulate when the supply voltage is 2.5 VDC...? Like a fancy 3 terminal... Could it take 30 VDC in ? I guess I wanted to see the magic smoke.... But probably it is characterized as 5 VDC in...like old TTL logic...then drop to 1.8 for the new faster processor parts...like on card regulation...and ony an iddiot would want to drop that much voltage by supplying it with 30 VDC... It is a darling little part... I liked putting in the first CMP at TI Sherman Tx...yours truly did that...1992 ish And to find the birthplace of my beloved the 7400 logic family....along with the higher temp 54 logic chips...a bipolar cute fab north of the the big D.. And you can't beat fishing for stripper on the Red River....or going into OK....for Arlines Catfish...lightly breaded... I and Robert Blackwell ..the TI king fab leader...since my install and training went good enough...we just took some time to go fish... I love TX Don't ramble Fred Thanks...
1.8v is a very weird voltage. Gone are the days of everything being 5v. And gone are the days of software engineers who tinker with TTL, CMOS and LEDs on a breadboard using a 5v USB adapter as a power supply :-)
Nice TPS report!
Many microcontrollers from a decade ago use the 1.8V as the voltage for the CPU core even when using 3.3V for the I/O. Since the microcontroller needs both the 3.3V power and 1.8V power stabilized before leaving reset (the deglitch and delay block), the /reset from the 3.3V super and the /reset from this can be tied together to the /reset input of the microcontroller. And therefore only need 3 chips (2 regulators and the microcontroller) instead of 5 (2 regulators, 2 voltage supervisors, and the microcontroller) 🙂
I was just gonna ask... Where do we see 1.8 I've never really used it myself, and at one amp it makes sense because it's too much for LEDs, too low for audio amps but just about right for a small controller. This is exactly why I watch these types of things. A few minutes of my time, if I pay attention... Well it can feel like a time waste sometimes but actually what happens is I pre learn stuff then end up handily informed when I see it IRL
advanced very-low-voltage CMOS (AVC) logic family
@@IMSAIGuy I was thinking of the atmel uc3 microcontrollers, and, more recently, the many chips with ARM Cortex-M0+ and 80-MHz clock speeds. They require the lower voltage for the CPU to avoid overheating because power scales with clock frequency and voltage (P ~ Fclk * Vcc^2)
"Everybody loves chip of the day!"
I like it. It may be useful for powering a clock or a digital thermometer with an 18650 battery.
Chip of the day!
Can you do a detailed video on any soft switches u've built
I wanted to see when it dropped out of regulation....
Ok Fred...go look it up..
Nice to see a mosfet as the pass element...
So maybe to maintain 1.8 VDC...
Could it regulate when the supply voltage is 2.5 VDC...?
Like a fancy 3 terminal...
Could it take 30 VDC in ? I guess I wanted to see the magic smoke....
But probably it is characterized as 5 VDC in...like old TTL logic...then drop to 1.8 for the new faster processor parts...like on card regulation...and ony an iddiot would want to drop that much voltage by supplying it with 30 VDC...
It is a darling little part...
I liked putting in the first CMP at TI Sherman Tx...yours truly did that...1992 ish
And to find the birthplace of my beloved the 7400 logic family....along with the higher temp 54 logic chips...a bipolar cute fab north of the the big D..
And you can't beat fishing for stripper on the Red River....or going into OK....for Arlines Catfish...lightly breaded...
I and Robert Blackwell ..the TI king fab leader...since my install and training went good enough...we just took some time to go fish...
I love TX
Don't ramble Fred
Thanks...
TLDR
According to the datasheet the dropout is 210mV so the input needs to be more than 2.01V (both for the 1.8V part). Maximum input 7V, recommended 6V.
1.8v is a very weird voltage. Gone are the days of everything being 5v. And gone are the days of software engineers who tinker with TTL, CMOS and LEDs on a breadboard using a 5v USB adapter as a power supply :-)
👍
Please....PLEASE....use a pointer instead of your finger!!!!