QBAR^® switch holds regulator down until sequencing logic HI is received. Could be used, for example, to manage turn-on and turn-off transients of main system supply.

Current limiting (or other inhibit features) are provided for op amps and other driver ICs which lack an inhibit pin. QBAR^® switch breaks the ICs ground lead when Iload is excessive.

A QBAR^® switch activates an alarm over a large range of system failure conditions:

• system failure indicated by a LO on the status output
• status conductor cut
• status conductor shorted to ground
• loss of +5 V supply

Any of these conditions will cause the QBAR^® switch to turn ON, powering the alarm.

A QBAR^® range switch attenuator protects sensitive amplifiers from overdrive damage when the power supply is interrupted or lost. QB312 types are well suited to linear attenuator applications.

LED (and other similar) drivers with low voltage and/or current capability can drive high brightness displays and other loads simply through non-inverting QBAR^® switches.

Push-pull loads can be controlled by one signal wire, and without a local logic supply. This Bottom Half H-Bridge provides low-cost remote activation for brushless d.c. motors and other phase/antiphase loads.

QBAR^® switches simplify interfacing when system outputs require a non-inverting driver. Easy-to-drive QBAR^® switches require much less input/control current than electromechanical or opto-electronic (solid-state) relay coils or inputs. QBAR^® switches also usually operate much faster.

Inverter (that's right!) provides large and controllable hysteresis.