Description:The 844001 is a Fibre Channel Clock Generator and a member of the family of high performance devices from IDT. The 844001 uses an 18pF parallel resonant crystal over the range of 20.4MHz - 28.3MHz. For Fibre Channel applications, a 26.5625MHz crystal is used. The frequency select pin allows the device to generate either 106.25MHz or 212.5MHz from a 26.5625MHz crystal. To generate 187.5MHz for 12Gb Ethernet, a 23.4375MHz crystal is used. The 844001 uses IDT's 3rd generation low phase noise VCO technology and
Renesas provides a reference design guide for the 844001AGLF, which includes recommendations for PCB layout, thermal management, and component placement to ensure optimal performance and thermal dissipation.
Renesas recommends using a power management IC (PMIC) specifically designed for the 844001AGLF, such as the Renesas R2A20134, to ensure proper power sequencing and voltage regulation. The PMIC datasheet provides detailed guidelines for implementation.
The 844001AGLF requires a high-quality clock signal with a specific frequency and jitter tolerance. Renesas recommends using a clock generator or oscillator with a dedicated clock output, and ensuring that the clock signal is properly terminated and routed on the PCB to minimize jitter and noise.
Renesas provides power-saving modes and dynamic voltage and frequency scaling (DVFS) features in the 844001AGLF. Engineers can optimize power consumption by using these features, as well as implementing power gating, clock gating, and dynamic frequency scaling in their design.
Renesas provides a validation guide for the 844001AGLF, which includes recommended testing procedures, test vectors, and validation criteria to ensure that the device is functioning correctly and meeting performance specifications.
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844001AGLF Overview
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