Description:The 85311 is a low skew, high performance 1-to-2 Differential-to-2.5V/3.3V ECL/LVPECL Fanout Buffer. The CLK, nCLK pair can accept most standard differential input levels. The 85311 is characterized to operate from either a 2.5V or a 3.3V power supply. Guaranteed output and part-to-part skew characteristics make the 85311 ideal for those clock distribution applications demanding well defined performance and repeatability.
Renesas provides a recommended PCB layout guide in their application note (R01AN3601EJ0100) which includes thermal design considerations, such as thermal vias, copper pours, and component placement, to ensure optimal thermal performance.
Renesas recommends a specific power sequencing scheme in their application note (R01AN3601EJ0100) to ensure proper device operation. The sequence involves powering up the VCC, then the VDD, and finally the AVCC, with a delay of at least 10ms between each power-up.
Although the datasheet specifies the recommended operating conditions, it's essential to note that the maximum allowed voltage on the analog input pins is VCC + 0.3V, as exceeding this voltage may cause damage to the device.
Renesas recommends implementing ESD protection measures, such as using ESD diodes or TVS diodes, to protect the device from electrostatic discharge. Additionally, handling the device by the body or using an anti-static wrist strap can also prevent ESD damage.
Renesas recommends using a high-quality clock signal with a jitter of less than 100ps to ensure proper device operation. A clock signal with excessive jitter may cause issues with the device's internal PLL or affect its overall performance.
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85311AMLF Overview
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