Low power MCU, crystal oscillator

QWE4562009

Low power MCU, crystal oscillator [Copy link]

Low power MCU, crystal oscillator

1. Crystal oscillators include passive crystal oscillators and active crystal oscillators, 2-pin and 4-pin. 2P crystal oscillators are more convenient in design and patch technology. What are the advantages of 4-pin active crystal oscillators over 2-pin passive crystal oscillators?

2. Is 2.5-5.5V considered low power? I see that the lowest power supply of foreign low-power chips is 1.8V

3. In operating mode, is an indicator like 100uA/MHZ considered low power consumption? Generally, what is the lower limit to be considered truly low power consumption?

dcexpert

There are also many passive crystals with 4 pins. Active ones have better stability and even better temperature compensation functions.

hxm3000

What kind of chip is this power-saving? It also has an RTC. Is the package large?

QWE4562009

hxm3000 posted on 2021-10-11 20:09 What kind of chip is this power-saving? It also has an RTC. Is the package large?

How do you judge whether it is power-saving? Isn't it normal to have RTC chips now?

QWE4562009

dcexpert posted on 2021-10-11 19:51 There are also many passive crystals with 4 pins. Active ones have better stability and better temperature compensation function.

Moderator, please tell me 2 or 3

dcexpert

QWE4562009 posted on 2021-10-12 11:17 Moderator, please tell me 2 or 3

Under the same conditions, the lower the voltage, the lower the power consumption, but the power supply of other chips also needs to be considered. In theory, the lower the power consumption, the better, but the actual power consumption is related to factors such as working mode, battery capacity, and environment. It is OK as long as it meets the needs.