Current mode logic

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Current mode logic or CML is a differential digital logic family intended to transmit data at speeds between 312.5 Mbit/s and 3.125 Gbit/s over a standard printed circuit boards. [1]

CML termination scheme
CML termination scheme

The transmission is point-to-point, unidirectional and is usually terminated at the destination with 50 Ω resistors to Vcc on both links. CML logic is the physical layer used in DVI and HDMI video links, and is frequently used in interfaces to fiber optic components.

[edit] References

  1. ^ Serial Interface for Data Converters, JEDEC standard JESD204, April 2006
  • System Interface Level 5 (SxI-5): Common Electrical Characteristics for 2.488 – 3.125 Gbit/s Parallel Interfaces. OIF, October 2002.
  • TFI-5: TDM Fabric to Framer Interface Implementation Agreement. OIF, September 16, 2003
  • Introduction to LVDS, PECL, and CML, Maxim, http://pdfserv.maxim-ic.com/en/an/AN291.pdf
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