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CD4538 Arkusz danych(PDF) 1 Page - National Semiconductor (TI) |
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CD4538 Arkusz danych(HTML) 1 Page - National Semiconductor (TI) |
1 / 10 page TLF6000 February 1988 CD4538BMCD4538BC Dual Precision Monostable General Description The CD4538B is a dual precision monostable multivibrator with independent trigger and reset controls The device is retriggerable and resettable and the control inputs are inter- nally 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 deter- mined by external components RX and CX The device does not allow the timing capacitor to discharge through the tim- ing pin on power-down condition For this reason no exter- nal protection resistor is required in series with the timing pin Input protection from static discharge is provided on all pins Features Y Wide supply voltage range 30V to 15V Y High noise immunity 045 VCC (typ) Y Low power Fan out of 2 driving 74L TTL compatibility or 1 driving 74LS Y New formula PWOUT e RC (PW in seconds R in Ohms C in Farads) Y g 10% pulse-width variation from part to part (typ) Y Wide pulse-width range 1 msto % Y Separate latched reset inputs Y Symmetrical output sink and source capability Y Low standby current 5 nA (typ) 5VDC Y Pin compatible to CD4528B Block and Connection Diagrams TLF6000 – 1 RX and CX are External Components VDD e Pin 16 VSS e Pin 8 Dual-In-Line Package CD4538BM CD4538BC TLF6000 – 2 Top View Order Number CD4538B Truth Table Inputs Outputs Clear A B Q Q LX X L H XH X L H XX L L H HL v H u H H e High Level L e Low Level u e Transition from Low to High v e Transition from High to Low e One High Level Pulse e One Low Level Pulse X e Irrelevant C1995 National Semiconductor Corporation RRD-B30M105Printed in U S A |
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