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Hi All!
I am looking for an inspirartion for a level shifter circuit (unidir.) between 1.8V and 3.3V digital systems. Sadly, I can't use dedicated chips - they must be radhard and SEL free and I couldn't find proper products on the market. The only option is to use discrete components. Max...
The device with Vcore listed as "1.2V,1.5V" means that you can use this device with Vcore=1.2 or Vcore=1.5V. It does not mean that you have to provide two different voltages.
1. Go to SRS's website
2. Products -> Time & Frequency Instruments
3. Frequency Standards/Oscillators -> PRS10 10 MHz Rubidium Oscillator
Ir is really easy.
You can do a simulation before you buy anything. Get Intel/Altera Quartus Prime (it's for free), you can build a logic circuit using block diagram a 74-family "virtual chips" and then compile it for different CPLDs and see if your design will fit into chips. You can start from Altera EPM3064 but...
Try using SignalTap logic analyzer to see if you can receive something.
And the 88E1111 chip is hard to use because there is no public documentation for it. You have to pay and sign NDA to get any information about config. registers etc.
There is one European FPGA manufacturer of the rad-hard chips:
https://www.esa.int/Our_Activities/Space_Engineering_Technology/Shaping_the_Future/High_Density_European_Rad-Hard_SRAM-Based_FPGA-_First_Validated_Prototypes_BRAVE
They plan to make a rad-hard SoC (ARM+FPGA) chips as well.
You could also look at Cora Z7 board from Digilent - it's $99 and some pins are accessible over Pmod and Arduino like sheilds. The hardware itself is important but also docs provided by the pcb manufacturer and some examples might be useful as well.
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