MK2069-04GITR

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The MK2069-04GITR is a clock generator, phase locked loop (PLL) and frequency synthesizer integrated circuit (IC) from Micrel Semiconductor. It is part of the company’s Clock/Timing portfolio, and is designed to help simplify clock and timing design for a variety of applications.

The MK2069-04GITR is a complete PLL frequency synthesizer with pre-programmed clock generator functionality, which includes adjustable characteristics such as digitally controlled output level, slew rate, and pre-emphasis. It also allows up to 24 selectable frequency selections with a resolution down to 200kHz, and a best-in-class jitter performance of 0.15psrms at 156.25MHz.

The MK2069-04GITR is designed with a wide supply operating range between 3.3V and 5.5V, and is ideal for a variety of desktop, server, telecom and networking systems. The chip is housed in a 32-pin LLP package and has a low power consumption of less than 50mW. It also features an on-chip pull-up calibration resistor, an on-chip oscillator, and an adjustable current source.

The application field for the MK2069-04GITR includes PC/server clock generators, access point clock generators, router/switch clock generators, embedded clock generators, cameras/PRI modules clock generators, VoIP phone clock generators, Ethernet jumper clock generators, test & measurement devices clock generators, and global navigation satellite systems (GNSS) clock generators. Some of the key features and benefits of the circuit include low total jitter, programmable output impedance, selectable frequency, and adjustable current source.

Working Principle

The MK2069-04GITR uses a PLL architecture to accomplish frequency synthesis. This PLL consists of a frequency source, a phase detector, and a low-pass filter, as well as a programmable divider. The frequency source can be set to a base frequency, typically between 4 and 40 MHz, by using an integrated crystal oscillator. The frequency source is then used to drive the required frequency output. The phase detector is used to detect the difference between the feedback input and the reference input, which is used to find the output frequency.

The PLL architecture enables the frequency synthesizer to be used for a variety of applications, including frequency switching and clock multiplication. The frequency synthesizer can be programmed to accept signals from a variety of reference sources, including crystal oscillators, clock synthesizers, and programmable oscillators. The MK2069-04GITR can also be programmed to output any signal that is within the operating range specified on its data sheet, up to 200MHz.

In addition to its programmability, the MK2069-04GITR also features advanced design and power management features that can help reduce system power consumption. The low-power current source feature enables the chip to efficiently use power, while the on-board pull-up resistor helps maintain consistent performance even under changing supply voltage conditions.

The MK2069-04GITR is a powerful, flexible and easy-to-use frequency synthesizer with a wide range of applications, designed to simplify clock and timing design for a variety of systems. Its integrated PLL architecture, programmable divider and wide supply operating range make it ideal for use in a variety of clock and timing solutions, from PC/server to VoIP phone applications.

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