Title here
Summary here
Specifications
Recommended Operating Conditions
| SUPPLY VOLTAGE | MIN | TYP | MAX | UNIT |
|---|---|---|---|---|
| 12 VDC | +11.4 | +12 | +12.6 | V |
| 3.3 VDC | +3.14 | +3.3 | +3.46 | V |
| VADJ (1.2VDC) | +1.14 | +1.2 | +1.26 | V |
| VADJ (1.5VDC) | +1.425 | +1.5 | +1.575 | V |
| VADJ (1.8VDC) | +1.71 | +1.8 | +1.89 | V |
| VADJ (2.5VDC) | +2.375 | +2.5 | +2.625 | V |
| VADJ (3.3VDC) | +3.135 | +3.3 | +3.465 | V |
Notes:
- 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 2x QSFP28 FMC will depend heavily on the QSFP28 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 2x QSFP28 FMC, however we recommend that it be operated under ambient temperatures between -40 and 85 degrees C. This advice is based on the recommended ambient operating temperatures of a basket of QSFP28 modules currently on the market. The active devices on the mezzanine card itself have operating ranges that match or exceed those of typical QSFP28 modules and are listed in the table below.
| DEVICE | MIN | MAX | UNIT |
|---|---|---|---|
| TI, 3-16V 5A Buck Converter, TPS565247DRLR | -40 | 150 | C |
| TI, I2C Level Translator, TCA9416DDFR | -40 | 125 | C |
| Microchip, 2Kbit EEPROM, 34AA02T-I/OT | -40 | 85 | C |
| Skyworks, SyncE Jitter-Attenuating Clock Multiplier, SI5328B-C-GM | -40 | 85 | C |
| TI, Level Translator, SN74AVC4T245RSVR | -40 | 85 | C |
| Abracon, 114.285MHz Crystal, ABM8-166-114.285MHZ-T2 | -40 | 85 | C |
Components that are not listed in the table above (such as resistors, capacitors) are selected to have minimum operating temperature that is lower than -40 degrees C, and maximum operating temperature that is greater than 85 degrees C.
I2C (EEPROM) Timing
The serial EEPROM (part number Microchip, 2Kbit EEPROM, 34AA02T-I/OT ) has a maximum operating clock frequency of 400 kHz (Fast-mode).
I2C (CLK, QSFP0/1) Timing
The three PL I2C buses pass through level translators ( TCA9416 ) that support an I2C clock frequency up to 1MHz (Fast-mode Plus).
| Device | Standard-mode 100kHz | Fast-mode 400kHz | Fast-mode Plus 1MHz |
|---|---|---|---|
| Level translator TCA9416 | ✅ | ✅ | ✅ |
Certifications
- RoHS
- CE