Pb
A product Line of
Diodes Incorporated
Lead-free Green
PI6C557-03A
PCIe 2.0 Clock Generator with 2 HCSL Outputs
Features
Description
ÎÎPCIe® 2.0 compliant
The PI6C557-03A is a spread spectrum clock generator compliant to
PCI Express® 2.0 and Ethernet requirements. The device is used
for PC or embedded systems to substantially reduce Electromagnetic Interference (EMI).
àà Phase jitter - 2.1ps RMS (typ)
ÎÎLVDS compatible outputs
ÎÎSupply voltage of 3.3V ±10%
ÎÎ25MHz crystal or clock input frequency
The PI6C557-03A provides two differential (HCSL) or LVDS
spread spectrum outputs. The PI6C557-03A is configured to
select spread and clock selection. Using Pericom's patented
Phase-Locked Loop (PLL) techniques, the device takes a 25MHz
crystal input and produces two pairs of differential outputs (HCSL)
at 25MHz, 100MHz, 125MHz and 200MHz clock frequencies.
It also provides spread selection of -0.5%, -0.75%, and no spread.
ÎÎHCSL outputs, 0.8V Current mode differential pair
ÎÎJitter 35ps cycle-to-cycle (typ)
ÎÎSpread of -0.5%, -0.75%, and no spread
ÎÎIndustrial temperature range
ÎÎSpread Bypass option available
ÎÎSpread and frequency selection via external pins
ÎÎTotally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
ÎÎHalogen and Antimony Free. “Green” Device (Note 3)
ÎÎPackaging: (Pb-free and Green)
àà 16-pin TSSOP (L16)
àà 16-pin QSOP (Q16)
Block Diagram
Pin Configuration (16-Pin TSSOP)
VDD
2
SS1:SS0
S1:S0
2
CLK0
Control
Logic
2
CLK0
Phase
Lock
Loop
CLK1
X1/CLK
25 MHz
crystal or clock X2
Pulling
Capacitors
CLK1
Crystal
Driver
2
S0
1
16
VDDX
S1
2
15
CLK0
SS0
3
14
CLK0
X1/CLK
4
13
GNDA
X2
5
12
VDDA
OE
6
11
CLK1
GNDX
7
10
CLK1
SS1
8
9
IREF
RR
GND
OE
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant.
2. See https://www.diodes.com/quality/lead-free/ for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain
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