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CD4047BC Datasheet(PDF) 1 Page - National Semiconductor (TI) |
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CD4047BC Datasheet(HTML) 1 Page - National Semiconductor (TI) |
1 / 6 page TLF5969 October 1993 CD4047BMCD4047BC Low Power MonostableAstable Multivibrator General Description CD4047B is capable of operating in either the monostable or astable mode It requires an external capacitor (between pins 1 and 3) and an external resistor (between pins 2 and 3) to determine the output pulse width in the monostable mode and the output frequency in the astable mode Astable operation is enabled by a high level on the astable input or low level on the astable input The output frequency (at 50% duty cycle) at Q and Q outputs is determined by the timing components A frequency twice that of Q is available at the Oscillator Output a 50% duty cycle is not guaranteed Monostable operation is obtained when the device is trig- gered by low-to-high transition at a trigger input or high-to- low transition at b trigger input The device can be retrig- gered by applying a simultaneous low-to-high transition to both the a trigger and retrigger inputs A high level on Reset input resets the outputs Q to low Q to high Features Y Wide supply voltage range 30V to 15V Y High noise immunity 045 VDD (typ) Y Low power TTL Fan out of 2 driving 74L compatibility or 1 driving 74LS SPECIAL FEATURES Y Low power consumption special CMOS oscillator con- figuration Y Monostable (one-shot) or astable (free-running) opera- tion Y True and complemented buffered outputs Y Only one external R and C required MONOSTABLE MULTIVIBRATOR FEATURES Y Positive- or negative-edge trigger Y Output pulse width independent of trigger pulse dura- tion Y Retriggerable option for pulse width expansion Y Long pulse widths possible using small RC components by means of external counter provision Y Fast recovery time essentially independent of pulse width Y Pulse-width accuracy maintained at duty cycles ap- proaching 100% ASTABLE MULTIVIBRATOR FEATURES Y Free-running or gatable operating modes Y 50% duty cycle Y Oscillator output available Y Good astable frequency stability typical e g 2% a 003% C 100 kHz frequency e g 05% a 0015% C 10 kHz deviation (circuits trimmed to frequency VDD e 10V g10%) Applications Y Frequency discriminators Y Timing circuits Y Time-delay applications Y Envelope detection Y Frequency multiplication Y Frequency division Block and Connection Diagrams TLF5969 – 1 Dual-In-Line Package TLF5969 – 2 Top View Order Number CD4047B C1995 National Semiconductor Corporation RRD-B30M105Printed in U S A |
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