PI6C557-01B Datasheet, PDF (1/8 Pages) Pericom Semiconductor Corporation – PCIe 3.0 Clock Generator with 1 HCSL Outputs

PI6C557-01B
PCIe 3.0 Clock Generator with 1 HCSL Outputs
Features
ÎÎPCIe® 3.0 compliant
àà Phase jitter - 0.45ps RMS (High Freq. Typ.)
ÎÎLVDS compatible output
ÎÎSupply voltage of 3.3V ±10%
ÎÎ25MHz crystal or clock input frequency
ÎÎHCSL outputs, 0.8V Current mode differential pair
ÎÎJitter 35ps cycle-to-cycle (typ)
ÎÎSpread of -0.5% and no spread
ÎÎIndustrial temperature range
ÎÎSpread Bypass option available
ÎÎSpread selection via external pins
ÎÎPackaging: (Pb-free and Green)
àà 16-pin TQFN
Description
The PI6C557-01B is a spread spectrum clock generator compli-
ant to PCI Express® 3.0 and Ethernet requirements. The device is
used for PC or embedded systems to substantially reduce Electro-
magnetic Interference (EMI).
The PI6C557-01B provides one differential (HCSL) or LVDS
spread spectrum output. Using Pericom's patented Phase-Locked
Loop (PLL) techniques, the device takes a 25MHz crystal input
and produces one pair of differential outputs (HCSL) at 100MHz.
It also provides spread selection of -0.5% and no spread.
Block Diagram
Pin Configuration (16-Pin TQFN)
VDD
SS1
X1/CLK
25 MHz
crystal or clock _X2
Pulling
Capacitors
Control
Logic
Crystal
Driver
Phase
Lock
Loop
GND
CLK
CLK
R_R (IREF)
GND
1
X1
X2
NC
5
13
CLK
CLK
GND
9
VDDA
All trademarks are property of their respective owners.
14-0045
1
PI6C557-01B
RevB
04/07/2014