P1817AF-08SR

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Clock/Timing - Clock Generators, PLLs, Frequency Synthesizers offer very precise performance in order to help achieve accurate data transmission and therefore are widely used in many applications such as multi-standards communications, clock synchronization, and multiplexing systems. The P1817AF-08SR is one of such devices, the working principle of this particular device will be introduced and explained in this article.

The P1817AF-08SR device is a clock generator and PLL frequency synthesizer, which is specifically designed for IEEE-1394 (Firewire) applications. It is capable of generating multiple signals with very low jitter and equips with 3 IC (Integrated Circuits) – MC10111, PLL 3060A, and P1L0118. The MC10111 acts as a low power, programmable, LVHS (Low Voltage High Speed) line, interface and control circuit for IEEE-1394 applications, and it is LT Latch Configuration for board routing. The PLL3060A is a low jitter PLL (Phase-Locked Loop) clock synthesizer for high-performance phase synchronization and frequency synthesis application, using a low power 0.25um CMOS (Complementary Metal-oxide semiconductor) process. Lastly, the PLL0118 is employed as a voltage regulator to provide a smooth supply voltage for the PLL3060A.

On top of the three core devices mentioned above, the P1817AF-08SR also implements a sound crafting design. For latency and jitter, an advanced EMI (Electro-magnetic Interference) circuitry is utilized in order to provide isolation for the critical portions of circuit that influences those two parameters. Additionally, the P1817AF-08SR is equipped with a unique noise filtering feature. This feature utilizes a dual bypass circuit to cancel out the clock skips and glitching in the frequency synthesizer by minimising the phase noise generated by the device. Thus, providing exquisite performance in clock synchronization as well as frequency synthesis. The overall performance achieved by the P1817AF-08SR is attributable to the design of this device.

The P1817AF-08SR was designed mainly for clock synchronization applications; and it is particularly suitable for critical data transmission systems such as Serial ATA (Advanced Technology Attachment) communication, Ethernet networks, and wireless communications. These applications have demanding requirements with respect to total timing jitter, extracted clock quality, and Ethernet clock skew. The P1817AF-08SR is capable of satisfying such needs and generate a stable clock thereby ensuring reliable data transmission. Moreover, it also provides features such as 8/10 clock feedback, 8/10-bit output, and MBIST (MBIST-Command-and-Control) for built-in self test.

To summarize, the P1817AF-08SR from Primex Technology Inc. is a LVHS programmable clock generator and PLL frequency synthesizer mainly for IEEE-1394 (Firewire) applications. It is equipped with a unique sound crafting design including an advanced EMI circuitry and noise filtering feature. The device is capable of generating a low jitter clock that is sufficient to fulfill the high requirements of data transmission systems. On its feature list, the P1817AF-08SR also provides 8/10 clock feedback and MBIST capabilities.

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