资 源 简 介
The CD4538BC is a dual, precision monostable mulTIvibratorwith independent trigger and reset controls. The deviceis retriggerable and resettable, and the control inputs areinternally latched. Two trigger inputs are provided to alloweither rising or falling edge triggering. The reset inputs areacTIve LOW and prevent triggering while acTIve. Precisecontrol of output pulse-width has been achieved using linearCMOS techniques. The pulse duraTIon and accuracyare determined by external components RX and CX. Thedevice does not allow the timing capacitor to dischargethrough the timing pin on power-down condition. For thisreason, no external protection resistor is required in serieswith the timing pin. Input protection from static discharge isprovided on all pins.Features Wide supply voltage range: 3.0V to 15V High noise immunity: 0.45 VCC (typ.) Low power TTL compatibility:Fan out of 2 driving 74L or 1 driving 74LS New formula:PWOUT = RC (PW in seconds, R in Ohms, C in Farads) ±1.0% pulse-width variation from part to part (typ.) Wide pulse-width range: 1 μs to ∞ Separate latched reset inputs Symmetrical output sink and source capability Low standby current: 5 nA (typ.) @ 5 VDC Pin compatible to CD4528BC
