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CD4538BC

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Dual Precision Monostable

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General Description

The CD4538BC is a dual, precision monostable multivibrator with independent trigger and reset controls. The device is retriggerable and resettable, and the control inputs are internally latched. Two trigger inputs are provided to allow either rising or falling edge triggering. The reset inputs are active LOW and prevent triggering while active. Precise control of output pulse-width has been achieved using linear CMOS techniques. The pulse duration and accuracy are determined by external components RX and CX. The device does not allow the timing capacitor to discharge

through the timing pin on power-down condition. For this reason, no external protection resistor is required in series with the timing pin. Input protection from static discharge is provided on all pins.

Features

¡öWide supply voltage range: 3.0V to 15V

¡öHigh noise immunity: 0.45 VCC(typ.)

¡öLow power TTL compatibility: Fan out of 2 driving 74L or 1 driving 74LS

¡öNew formula: PWOUT =RC (PW in seconds, R in Ohms, C in Farads)

¡ö¡À1.0 pulse-width variation from part to part (typ.)

¡öWide pulse-width range: 1 ?s to ¡Þ

¡öSeparate latched reset inputs

¡öSymmetrical output sink and source capability

¡öLow standby current: 5 nA (typ.) @ 5 VDC

¡öPin compatible to CD4528BC

CD4538BC²úÆ·ÊôÐÔ

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    CD4538BC

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    Fairchild Semiconductor

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    Dual Precision Monostable

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FAIRCHILD
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