Global Standards for the Microelectronics Industry
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1.2 V HIGH-SPEED LVCMOS (HS_LVCMOS) INTERFACE
This standard defines the dc and ac input levels, output levels, and input overshoot and undershoot specifications for the 1.2 V High-speed LVCMOS (HS_LVCMOS) interface. The non-terminated interface has a switching range that is nominally expected to be 0 V to 1.2 V and is primarily intended to support communications with Wide I/O SDRAM devices.
DRIVER SPECIFICATIONS FOR 1.8 V POWER SUPPLY POINT-TO-POINT DRIVERS
This material is intended to be reflected in supplier specifications for point to point DDR devices ranging from 400 Mb/s to 800 Mb/s operation. It is a method to specify driver impedance with something other than a number that does not nec-essarily define how it operates in a real net This standard addresses this issue using net lengths and specifies how much uncertainty can exist in the data for each speed supported.