91857AGLF

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In the field of electronic clock and timing devices, 91857AGLF is a commonly used programmable clock generator that is used to generate stable clock signals of different frequencies. Its features, applications and working principle are described in detail in this article.

Features

The 91857AGLF clock generator is specific for 2.5V and 3.3V applications. It is a compatible product of America MCM, LLC which is a U.S. based leader in high performance clock and timing solutions.

The key features of this device are as follows:

• Support frequency range from 20 MHz to 160 MHz
• Output duty cycle programmed from 45% to 55%
• Low jitter clock output
• Programmable in two frequencies
• Outputs levels selectable between 3.3V LVCMOS and 2.5V LVCMOS

Application

The 91857AGLF is utilized in several applications such as communication systems, clock and data distribution, LED signage and other portable applications. It is also used in various data links including spread spectrum, Time Division Multiple Access (TDMA) and Code Division Multiple Access (CDMA).

Its clock output can also be used for driving multiple ASICs, FPGAs or other processors. Moreover, some of its other applications include consumer electronics, communication, imaging, industrial control and instrumentation.

Working Principle

The 91857AGLF clock generator works through a specialized oscillator configuration. It generates a high-frequency reference signal which is then used as the base signal for the clock and data distribution. The output of the clock generator then is divided down to produce up to two separate frequencies.

The device works on the principle of phase-locked loop (PLL) which enables it to generate clock signals of various frequencies. The PLL is a closed-loop control system that uses feedback to ensure that the frequency and phase of a generated reference signal match with the output of a divided-down, or feedback, signal.

The 91857AGLF can be programmed to generate different combinations of high- and low-frequency signals, and its output duty cycle can be adjusted too. Additionally, an enable input is provided to stop or start the clock output.

Conclusion

The 91857AGLF clock generator is widely used in various clock and timing applications. With its support for high frequencies, enhanced output control and low noise, this device is often preferred by industry professionals. Furthermore, understanding the working principle of this device helps designers to get the maximum out of its performance.

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