8521BYLF Overview
It's a electronic part of the 32-LQFP package. It's packaged in the form of a Tray. The maximum value for normal operation is 500MHz. It's set up in the way of Surface Mount. Fanout Buffer (Distribution), Multiplexer is the classification for this electrical component. To ensure reliable performance, the temperature should be set to 0°C~70°C. It should be able to work with a power source of 3.135V~3.465VV. Its output is HSTL. It is a member of the ICS8521 family.
8521BYLF Features
The operating temperature of 0°C~70°C degrees

8521BYLF Applications
There are a lot of Renesas Electronics America Inc.
8521BYLF Clock Buffers & Drivers applications.

Synchronous digital system
Car
Aviation
Medical instruments
Furniture
Machine made
Clock signal duplication
Clock signal format conversion
Clock signal level shifting
High performance communication system

Mounting Type	Surface Mount
Package / Case	32-LQFP
Supplier Device Package	32-TQFP (7x7)
Operating Temperature	0°C~70°C
Packaging	Tray
Part Status	Obsolete
Moisture Sensitivity Level (MSL)	3 (168 Hours)
Type	Fanout Buffer (Distribution), Multiplexer
Voltage - Supply	3.135V~3.465V
Base Part Number	ICS8521
Output	HSTL
Number of Circuits	1
Frequency (Max)	500MHz
Input	CML, HCSL, HSTL, LVDS, LVPECL, SSTL
Ratio - Input:Output	2:9
Differential - Input:Output	Yes/Yes