The simple device example below consists of two lines: The device is defined on the instance line, starting with Lload ...: The first letter determines the device type (an inductor in this example). Following the device name are two nodes 1 and 2, then the inductance value 1u is set. The model name ind1 is a connection to the respective model line. Finally we have a parameter on the instance line, together with its value dtemp=5. Parameters on an instance line are called instance parameters.

The model line starts with the token .model, followed by the model name, the model type and at leat one model parameter, here tc1=0.001. There are complex models with more than 100 model parameters.

Lload 1 2 1u ind1 dtemp=5 
.MODEL ind1 L tc1=0.001

Instance parameters are listed in each of the following device descriptions. Model parameters sometimes are given below as well, for complex models like the BSIM transistor models, they are available in the model makers documentation. Instance parameters may also be placed in the .model line. Thus they are reckognized by each device instance referring to that model. Their values may be overridden for a specific instance of a device by placing them additionally onto its instance line.