12 VDC+11.4+12+12.6V
3.3 VDC+3.14+3.3+3.46V
VADJ (1.2VDC)+1.14+1.2+1.26V
VADJ (1.5VDC)+1.425+1.5+1.575V
VADJ (1.8VDC)+1.71+1.8+1.89V
VADJ (2.5VDC)+2.375+2.5+2.625V
VADJ (3.3VDC)+3.135+3.3+3.465V


  • All VADJ pins must be supplied with the same voltage chosen from one of the following levels: +1.2VDC, +1.5VDC, +1.8VDC, +2.5VDC, +3.3VDC. Note that many carriers have a system controller that will make this choice for you.

Power Consumption

The power consumption of the M.2 M-key Stack FMC will depend heavily on the M.2 modules being used and the load they are being put under. Power consumption measurements will be added to this section in the near future.

Thermal Information

We have not performed comprehensive thermal testing on the M.2 M-key Stack FMC, however we recommend that it be operated under ambient temperatures between 0 and 70 degrees C. This advice is based on the recommended ambient operating temperatures of a basket of NVMe SSDs currently on the market. The active devices on the mezzanine card itself have operating ranges that exceed those of the typical SSD and are listed in the table below.

Component Ambient Operating Temperatures

TI, 3-16V 5A Buck Converter, TPS565247DRLR-40150C
TI, IO Expander, TCA9536DTMR-40125C
TI, Dual Inverter, SN74LVC2G14DCKR-40125C
TI, Bus Switch, SN74CBTLV1G125DCKR-4085C
MicroChip, 2x Output PCIe Clock Generator, DSC557-0334FI1-4085C
ST, 2K EEPROM, M24C02-FDW6TP-4085C
Amphenol, PCIe M.2 connector, MDT420M02003-4080C

Components that are not listed in the table above (such as resistors, capacitors) are selected to have minimum operating temperature that is lower than -20 degrees C, and maximum operating temperature that is greater than 70 degrees C.

I2C (EEPROM) Timing

The serial EEPROM (part number ST, 2K EEPROM, M24C02-FDW6TP ) has a maximum operating clock frequency of 400 kHz.


  • RoHS
  • CE
  • UKCA