The EL2021 is designed to driveprogrammed voltages into difficultloads. It has the required circuitry to beused as the pin driver electronics in board test systems.Capable of overpowering logic outputs, the part canaccurately drive independently set high and low levels withprogrammed Slew Rates into reactive loads. It can also beplaced into high impedance to monitor the load withouthaving to disconnect. Previous board testers hadmultiplexing schemes to reduce the number of pin driversrequired. With the small size and power consumption of themonolithic EL2021, a driver per node with little or nomultiplexing becomes practical. Since only a few pins of“bed-of-nails” board testers need be active at any given time,the power-down feature saves substantial power in largesystems.