CD4060BMT

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CD4060BMT is a cascadable 14-stage binary ripple counter with an on-chip oscillator. It has low power Schottky TTL (LSTTL) compatible inputs and outputs. The 4060 device uses an internal oscillator and allows up to five ripple counters to be cascaded. It can easily be used to design a wide range of frequency dividers and time delay circuits. This article will discuss the application fields and working principle of the CD4060BMT.

Application Fields

The CD4060BMT is most commonly used in frequency division circuits and time delay applications. It can be used to build a wide range of frequencies, such as 0.1 Hz to 10 MHz. The frequency of the output signal is 1/2 of the input signal, and can be adjusted by changing the external capacitance. This makes the device very versatile in applications such as VCOs, PLLs, frequency synthesizers, and in general frequency divider circuits. It also can be used to delay a signal with a time period of 1 second up to 1 hour depending on the external components used in the circuit.

Working Principle

The internal oscillator of the 4060 is based on a divided-down RC oscillator which can generate a square wave of 660kHz when the external components are 1uF and 10K. The oscillator signal is applied to the Clock pin of the 4060, which in turn is fed to the Ck input of the first counter stage. The output Q0 of the first counter stage is connected to the Ck input of the second stage and so on up to the 14th counter. The dividers from the inverters, thus creating a binary division of the input clock frequency.

The output signals at the Q4, Q8 and Q12 pins has, respectively, a frequency one-fourth, one-eighth and one-sixteenth of the input frequency. The output signals at Q2, Q6, Q10, and Q14 pins have a frequency one-half, one-quarter, one-eighth, and one-sixteenth, respectively, of the intermediate output frequency. This occurs because the divide-by-four flip-flops use only the low-to-high transition at the clock pin as the enable conditions for the outputs.

Conclusion

The CD4060BMT is a widely used ripple counter that can be used to design a wide range of frequency dividers and time delay circuits. It is a very versatile device that can generate precise signals of frequencies ranging from 0.1 Hz to 10 MHz and with a delay range of up to 1 hour. The internal oscillator allows the 4060 device to be cascaded with other ripple counters for a wide range of frequency division applications.

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