840N022中文资料瑞萨数据手册PDF规格书

General Description

The 840N022 is a LVCMOS/LVTTL clock synthesizer designed for

Ethernet applications. The device generates a selectable 125MHz or

62.5MHz clock signal with excellent phase jitter performance. The

device uses IDT’s fourth generation FemtoClock® NG technology

for an optimum of high clock frequency, low phase noise

performance and low power consumption.The device supports 2.5V

or 3.3V voltage supply and is packaged in a small, lead-free (RoHS

6) 8-lead TSSOP package. The extended temperature range

supports wireless infrastructure, telecommunication, and networking

end equipment requirements

特性 Features

• Fourth generation FemtoClock® NG technology

• 125MHz output clock synthesized from a 25MHz fundamental

mode crystal

• One LVCMOS/LVTTL clock output

• Crystal interface designed for a 12pF parallel resonant crystal

• RMS phase jitter @ 125MHz, using a 25MHz crystal

(1.875MHz - 20MHz): 0.148ps (maximum)

• RMS phase jitter @ 125MHz, using a 25MHz crystal

(12kHz - 20MHz): 0.479ps (maximum)

• LVCMOS interface levels for the control inputs

• Full 2.5V or 3.3V supply voltage

• Lead-free (RoHS 6) packaging

• -40°C to 85°C ambient operating temperature

• Use replacement part: 840N202CKI-dddLF