The digital pullup resistor is a device which emulates the behavior of an analog resistance value tied to a high voltage level. The pullup may be used in conjunction with tristate buffers to provide open-collector wired "or" constructs, or any other logical constructs which rely on a resistive pullup common to many tristated output devices. The model posts an input load value (in farads) based on the parameters "load".

Port Table

Description Direction Default Type Allowed Types Vector Vector Bounds Null Allowed
Output OUT d d NO   NO

Parameter Table

Name Description Data Type Default Value Limits Vector Vector Bounds Null Allowed
load load value (F) Real 1.0e-12   NO   YES


a2 9 pullup1
.model pullup1 d_pullup(load = 20.0e-12)

See also

XSPICE Devices
XSPICE Code Models