CD4047BE | Texas Instruments

Low power monostable/astable, CD4047BE, Texas Instruments

The CD4047BE consists of a gatable astable multivibrator with logic technique incorporated to permit positive or negative edge-triggered monostable multivibrator action with retriggering and external counting option. Astable 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\ Output in this mode of operation is a function of the external component employed. A "True" input pulse on the ASTABLE input or a "Complement" pulse on the ASTABLE\ input allows the circuit to be used as a gatable multivibrator.

The OSCILLATOR output period will be half of the Q terminal output in the astable mode. However, a 50% duty cycle is not guaranteed at this output. The CD4047B triggers in the monostable mode when a positive-going edge occurs on the +TRIGGER input while the -TRIGGER is held low. An input pulse may be of any duration relative to the output pulse.

Features

• Lower power consumption: special CMOS oscillator configuration
• True and complemented buffered outputs
• Buffered inputs
• Standardized, symmetrical output characteristics

Applications

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