When driving a resistive load, a pull-up resistor is needed to limit the current through the pass transistor for a logic level of 210 mV to 450 mV when the TXH0137D-Q1 is in the low state to about 100 mA. To calculate the pull-up resistor value use the following equation.

where

• R_PU is the pull-up resistor
• V_PU is the pull-up voltage
• 0.21 V is the low logic level voltage
• 0.1 A is the maximum drive strength for the low logic level current

Table 6-1 provides the resistor values, reference voltages and currents at 100 mA, 50 mA, 25 mA, 15 mA, and 3 mA. The resistor value shown are recommended for typical V_OL or less.