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CD4538BC Datasheet(PDF) 1 Page - Fairchild Semiconductor |
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CD4538BC Datasheet(HTML) 1 Page - Fairchild Semiconductor |
1 / 11 page October 1987 Revised January 1999 © 1999 Fairchild Semiconductor Corporation DS006000.prf www.fairchildsemi.com CD4538BC Dual Precision Monostable General Description The CD4538BC is a dual, precision monostable multivibra- tor 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 lin- ear 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 s Wide supply voltage range: 3.0V to 15V s High noise immunity: 0.45 VCC (typ.) s Low power TTL compatibility: Fan out of 2 driving 74L or 1 driving 74LS s New formula: PWOUT = RC (PW in seconds, R in Ohms, C in Farads) s ±1.0% pulse-width variation from part to part (typ.) s Wide pulse-width range: 1 µs to ∞ s Separate latched reset inputs s Symmetrical output sink and source capability s Low standby current: 5 nA (typ.) @ 5 VDC s Pin compatible to CD4528BC Ordering Code: Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code. Connection Diagram Pin Assignments for DIP and SOIC Top View Truth Table H = HIGH Level L = LOW Level ↑ = Transition from LOW-to-HIGH ↓ = Transition from HIGH-to-LOW = One HIGH Level Pulse = One LOW Level Pulse X = Irrelevant Order Number Package Number Package Description CD4538BCM M16A 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150” Narrow Body CD4538BCWM M16B 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300” Wide Body CD4538BCN N16E 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” Wide Inputs Outputs Clear A B Q Q LX X L H XH X L H XX L L H HL ↓ H ↑ H |
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