74HCT4046ADB,118

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The 74HCT4046ADB is a precision monolithic phase-locked loop (PLL) IC which consists of a voltage controlled oscillator, phase detector, charge pump, and an accurate transmitting oscillator. The IC is capable of producing a highly stable frequency from an external crystal. The 74HCT4046ADB is suitable for a variety of applications, including the generation of timing signals, synchronization, and frequency conversion.

Features

• Phase-locked loop with voltage controlled oscillator
• Low phase noise and spurious signals
• High phase detector accuracy
• Compatible with the popular 5V CMOS microcontroller
• A wide range of operating temperature range: -40°C to +85°C
• A variety of output frequencies available with crystal or external clock reference
• Standard 8-pin DIP packaging for easy application/field test

Application fields and working principle

The 74HCT4046ADB is suitable for use in a variety of advanced applications, particularly in clock and timing generation. As such, it is used in many clock-generating systems such as frequency synthesizers, communications systems, and precision oscillators. The core of the device is a voltage controlled oscillator, which is responsible for generating highly precise and regular output frequencies.

The voltage controlled oscillator (VCO) enables the 74HCT4046ADB to receive input frequencies up to hundreds of megahertz. The input frequencies are then converted into an output modified frequency, with an ancillary frequency of up to or beyond one gigahertz. To control the input frequency, the 74HCT4046ADB has an adjustable frequency divider that works in sync with a phase detector. The output circuit of the IC then selects the frequency to be generated.

The 74HCT4046ADB also features a charge pump circuit, which is used to stabilize output frequencies by providing a stable and controllable operating current.

Conclusion

The 74HCT4046ADB is an ideal solution for generating highly precise, regular, and regular frequencies in clock-generating systems. With its adjustable frequency divider, VCO, and charge pump circuit, it can be used in a variety of advanced applications. The IC can also withstand extreme temperature ranges of -40°C to +85°C and is available in a standard 8-pin DIP package for easy application/field test.

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