Note that as VIN decreases, the frequency decreases. When the input to output voltage differential drops below l.5V, the LTC1148 series reduces tOFF by in- creasing the discharge current in CT. This prevents audible operation prior to dropout.
| Parameter | Symbol | Min | Max | Units |
| Input Leakage Current (Any input OiMNiVcc+0.5V, all other pins not under test=0 Volt) | II(L) | -5 | 5 | uA |
| Output Leakage Current (Data out is disabled, OViVOUT<Vcc) | IO(L) | -5 | 5 | uA |
| Output High Voltage LeveI(IOH=-5mA) | VOH | 2.4 | | V |
| Output Low Voltage LeveI(IOL=4.2mA) | VOL | | O4 | V |
| | | | |
