D4047 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 onthe 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 triggered 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.
D4047 is available in DIP14 package.

Features

· Wide supply voltage range : 3.0V to 15V
· High noise immunity: 0.45 VDD (typ.)
· Low power TTL compatibility :Fan out of 2 driving 74L or 1 driving 74LS
· Low power consumption: special CMOS oscillator configuration
· Only one external R and C required
· True and complemented buffered outputs
· Monostable (one-shot) or astable (free-running) operation
· Positive- or negative-edge trigger
· Output pulse width independent of trigger pulse duration
· Retriggerable option for pulse width expansion
· Long pulse widths possible using small RC components by means of external counter provision
· Fast recovery time essentially independent of pulse width
· Pulse-width accuracy maintained at duty cycles approaching 100%
· Free-running or gatable operating modes
· 50% duty cycle

Applications

· Frequency discriminators
· Timing circuits
· Time-delay applications
· Envelope detection
· Frequency multiplication
· Frequency division

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