Description:The 840272I is a PLL-based Frequency Translator intended for use in Synchronous Ethernet applications. This high performance device is optimized to generate 25MHz and 8kHz LVCMOS clock outputs. The 840272I accepts the following differential or single-ended input signals: 161.1328125MHz (10GbE Mode), 156.25MHz (1GbE Mode), or 125MHz (Recovered clock from 10/100/1000BaseT Ethernet PHY). The extended temperature range supports telecommunication and networking end equipment requirements.
Renesas provides a recommended PCB layout guide in their application note (APN) documents, which can be found on their website. The guide includes thermal vias, heat sink recommendations, and PCB layer stack-up suggestions to ensure optimal thermal performance.
Renesas recommends following the power sequencing guidelines outlined in the datasheet, which involves powering up the VCC and VCCIO pins in a specific order. Additionally, Renesas provides a power sequencing application note that provides more detailed information and examples.
Renesas recommends using high-quality, low-ESR decoupling capacitors with a value of 0.1uF to 1uF, placed as close as possible to the power pins. The datasheet provides more information on the recommended decoupling capacitor values and placement.
Renesas provides a JTAG troubleshooting guide in their application note documents, which covers common issues such as signal integrity, clock frequency, and voltage level problems. Additionally, Renesas recommends using their JTAG debugging tools and software to diagnose and resolve issues.
The 840272AGILF is rated for operation in industrial temperature ranges (-40°C to 85°C) and is designed to meet various environmental standards such as RoHS and REACH. The datasheet provides more information on the operating conditions, including voltage, current, and power consumption.
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840272AGILF Overview
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