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CD4538

双精密单稳态多谐振荡器

符合欧盟最新环保标准，已通过ROHS认证及REACH指令，绿色环保无铅产品。

CD45384000系列产品详情

The CD4538B is a dual,precision mono stable muli vibrator withindependent trigger and reset controls.The device is re trigger able andreset table,and the control inputs are inter-nally latched.Two triggerinputs are provided to allow either rising or falling edge triggering.Thereset inputs are active low and prevent triggering while active.Precisecontrol of output pulse-width has been achieved using linear CMOStechniques. The pulse duration and accuracy are deter-minedby external components Rx and Cx.The device does not allow thetiming capacitor to discharge through the tim-ing pin on power-downcondition.For this reason,no exter-nal protection resistor is required inseries with the timing pin.Input protection from static discharge isprovided on all pins.

Features

Wide supply voltage range:5.0V to 15V

High noise immunity:0.45 Vcc (typ.)

Low power TTL compatibility:Fan out of 2 driving 74L or 1 driving74LS

New formula:PWour =RC(PW in seconds,R in Ohms,C in Farads)

±1.0%pulse-width variation from part to part (typ.)

Wide pulse-width rang:1 μS to ∞

Separate latched reset inputs

Symmetrical output sink and source capability

Low standby current:5 nA (typ.)@ 5 VDC

Pin compatible to CD4528B