Forum Post: RE: DAC38J84: Configuration of SERDES lines for quad channel conversion at 1228.2 MSPS

Hello Blaz, In JESD204B, the standard defines the duration of each octet (8 bits), frame size (F), and also multi-frame size (K). This is to ensure each vendors to have some sort of common design for the data interface regardless of the overall chip design. With 8b/10b encoding, each octet will be converted to 10bit 8b/10b encoded word. Since each lane is operating at 12288.8Mbps, you can calculate the octet rate (i.e. column rate, and hence calculating the data rate). The actual term to define the interface rate is LMFS or local multi-frame rate. You may visit our training site for more detail. https://training.ti.com/high-speed-signal-chain-university -Kang