PI6C49016 Datasheet, PDF (1/16 Pages) Pericom Semiconductor Corporation – Low Power Networking Clock Generator

PI6C49016
Low Power Networking Clock Generator
Features
ÎÎ25 MHz crystal or clock input
ÎÎThree differential 100 MHz PCI-Express clock outputs –
push-pull termination
ÎÎSpread spectrum capability on all 100 MHz PCI-e clock
outputs with -0.5% down spread
ÎÎOne single-ended 66.66 MHz output
ÎÎOne single-ended 125 MHz output for Gigabit Ethernet at
2.5V
ÎÎOne single-ended 80 MHz output with selectable down
spread.
ÎÎ40-pin QFN package
ÎÎOperating voltage 3.3 V ±5%
ÎÎIndustrial temperature (-40 to +85°C)
Description
The PI6C49016 is a clock generator device intended for PCI-
Express/networking applications. The device includes three 100
MHz differential outputs for PCI-Express using reduced power,
one single-ended 125 MHz output, one single-ended 66.66 MHz,
and one single-ended 80 MHz output with spread spectrum.
Using a serially programmable SMBus interface, the PI6C49016
incorporates spread spectrum modulation on the four 100 MHz
PCI-Express outputs with -0.5% down spread and the 80 MHz
output with selectable down spread.
Block Diagram
VDD
VDDO
SCLK
SDATA
PD_RESET
X1/CLK
25 MHz
X2
External caps required
with crystal for accurate
tuning of the clock
Clock Buffer/
Crystal
Ocsillator
13-0102
PLL1 with
SS
PLL2
PLL3 with
SS
PLL4
100MHz PCI-Express 0
100MHz PCI-Express 1
100MHz PCI-Express 2
125MHz (2.5V)
80MHz
66.66MHz
GND
1
www.pericom.com
PI6C49016
Rev. B
06/25/13