CD4047 consists of a getable a stable multi vibrator with logic techniques incorporated to permit positive or negative edge-triggered monostable multi vibrator action with retriggering and external counting options.
Inputs include +TRIGGER, -TRIGGER, ASTABLE, ASTABLE\, RETRIGGER, and EXTERNAL RESET. Buffered outputs are Q\, Q and OSCILLATOR. In all modes of operation, and external capacitor must be connected between C-Timing and RC-Common terminal, and an external resistor must be connected between the R-Timing and RC-Common terminals.
A stable operation is enabled by a high level on the STABLE input or a low level on the ASTABLE\ input, or both. The period of the square wave at the Q and Q\ Outputs in this mode off operation is a function of the external components employed. “True” input pulses on the ASTABLE input or “Complement” pulses on the ASTABLE\ input allow the circuit to be used as a gatable multi vibrator. The OSCILLATOR output period will be half of the Q terminal output in the a stable mode. However, a 50% duty cycle is not guaranteed at this output.
The CD4047 triggers in the monostable mode when a positive-going edge occurs on the +TRIGGER-input while the -TRIGGER is held low. Input pulses may be of any duration relative to the output pulse.
The CD4047-Series types are supplied in 14-lead hermetic dual-in-line ceramic packages (F3A suffix), 14-lead dual-in-line plastic packages (E suffix), 14-lead small outline packages (M, MT, M96, and NSR suffixes), and 14-lead thin shrink small-outline packages (PW and PWR suffixes).
Features:-
- Lower power consumption: special CMOS oscillator configuration
- Monostable (one-shot) or a stable (free-running) operation
- True and complemented buffered outputs
- Only one external R and C required
- Buffered inputs
- 100% tested for quiescent current at 20 V
- Standardized, symmetrical output characteristics
- 5-V, 10-V, and 15-V parametric ratings
- Meets all requirements of JEDEC Tentative Standard No. 13B, “Standard Specifications for Description of ‘B’ Series CMOS Devices”
- Monostable Multi vibrator Features:
- Positive-or negative-edge trigger
- Output pulse width independent of trigger pulse duration
- Retrigger able option for pulse width expansion
- Internal power-on reset circuit
- 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%
- A stable Multi vibrator Features:
- Free-running or gatable operating modes
- 50% duty cycle
- Oscillator output available
- Good astable frequency stability:
Frequency deviation:
= ±2% + 0.03%/°C @ 100 kHz
= ±0.5% +0.015%/°C @ 10 kHz (circuits “trimmed” to frequency VDD = 10 V ± 10%)
- Applications:
Digital equipment where low-power dissipation and/or high noise immunity are primary design requirements:- Envelope detection
- Frequency multiplication
- Frequency division
- Frequency discriminators
- Timing circuits
- Time-delay applications
Specifications:-
| Parameter | Specification |
| Part number | CD4047B |
| Technology Family | CD4000 |
| VCC (Min) (V) | 3 |
| VCC (Max) (V) | 18 |
| Channels (#) | 1 |
| ICC @ nom voltage (Max)(mA) | 600 |
| IOL (Max) (mA) | 4 |
| IOH (Max) (mA) | -4 |
| Rating | See Data Sheet |
| Input Type | Standard CMOS |
| Output Type | Push-Pull |
| Features | Balanced |
* product image for illustration purposes only. actual product may vary.
Amar Kumar (Verified Customer) –