UCC2732x-Q1 provides an enable input for improved control of the driver operation. This input also incorporates logic-compatible thresholds with hysteresis. The input is internally pulled up to V_DD with a 100-kΩ (typical) resistor for active-high operation. When ENBL is high, the device is enabled, and when ENBL is low, the device is disabled. The default state of the ENBL pin is to enable the device, and therefore can be left open for standard operation. The output state when the device is disabled is low, regardless of the input state. See the truth table (Table 8-1) for operation using enable logic.

The ENBL input is compatible with both logic signals and slow-changing analog signals. It can be directly driven, or a power-up delay can be programmed with a capacitor between ENBL and AGND.