ISPPAC-CLK5308S-01T48I

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The ISPPAC-CLK5308S-01T48I device belongs to the category of Clock Generators, PLLs, and Frequency Synthesizers and is designed by Lattice Semiconductor to combat complex frequency synthesis problems. This device is based on the Adaptive Multi-Modulus Prescaler (AMMP) technology, and possesses a low skew frequency synthesizer with a wide range of output references and frequencies. Moreover, the device also features a phase saturable oscillator divider, a high speed digital signal processor, and a multi-modulus prescaler that all together work towards generating precise and stable clock signals.

This particular application field of the device is extensive and the device is further implemented in the following areas:

• Wireless Communications
• Broadband Communications
• Networking
• Test & Measurement Equipment
• Time Division Multiplexing (TDM) Systems
• Cable Modems
• Satellite Receivers
• Cordless Phones
• Tuners

The working principle of the ISPPAC-CLK5308S-01T48I device involves two primary stages which comprise of a frequency synthesizer and a cycle counter. The frequency synthesizer block is driven by a 20-bit reference frequency and it produces eight programmable differential clock outputs with a range of zero to 3.2 GHz. The cycle counter block is the second stage that aids in counting the cycles of the selected reference clock to generate an additional clock signal. The cycle counter features a total of three bands and the longest programmable count range is 63 bits long. The device also includes a differential CMOS output driver, an integrated SMBus interface, a programmable divider, and a programmable frequency doubler.

The frequency synthesizer offers high accuracy and precision in the output frequencies and is based on the AMMP technology. The device enables close-in phase noise performance, and is specially designed to replace complex PLL designs and discrete component solutions, thereby minimizing overall system costs. The frequency range of the device goes from zero to 6.4 GHz, making it suitable for applications demanding wide frequency options. The ISPPAC-CLK5308S-01T48I device also provides total output jitter of less than 1ps and a wide output enable timing range from 212µs to 427µs.

In conclusion, the ISPPAC-CLK5308S-01T48I device from Lattice Semiconductor is a portfolio of single-chip clock generators and synthesizers that address the challenges in designing frequency synthesizers for the mentioned application fields. Built on the Adaptive Multi-Modulus Prescaler technology, the device facilitates programming of a wide range of output references and frequencies ranging from zero to 6.4 GHz. It offers a host of features such as a high speed digital signal processor, a phase saturable oscillator divider, and a multi-modulus prescaler. Moreover, the ISPPAC-CLK5308S-01T48I device features total output jitter of less than 1ps, thus contributing to low power dissipation and power reduction as compared to other discrete component solutions.

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