General Description
The 810251I is a high performance, low jitter/low phase noise
VCXO. The 810251i uses a low frequency and low cost pullable
crystal to achieve jitter attenuation for synchronous Ethernet
applications. The 810251I can take an input of either 25MHz or
125MHz and produce a single LVCMOS output of 25MHz.
The device is packaged in a small 16 lead TSSOP package and is
ideal for use on space constrained boards typically encountered in
most synchronous ethernet applications.

Features
• One single-ended output (LVCMOS or LVTTL levels),
output Impedance: 15
• Phase jitter attenuation by the VCXO-PLL using a 25MHz pullable
external crystal (XTAL)
• Input frequencies: 25MHz or 125MHz
• Output frequency: 25MHz
• PLL loop bandwidth adjustable by external components
• 25MHz or 125MHz auto input frequency detect
• Full 3.3V or 2.5V supply voltage
• -40°C to 85°C ambient operating temperature
• Available in lead-free (RoHS 6) package