PI6C557-05Q Datasheet, PDF (1/9 Pages) Pericom Semiconductor Corporation – PCIe 2.0 Clock Generator with 4 HCSL Outputs for Automotive Applications

Product Features
ÎÎPCIe® 2.0 complaint
→Phase jitter - 2.1ps RMS (typ)
ÎÎLVDS compatible outputs
ÎÎSupply voltage of 3.3V ±5%
ÎÎ25MHz crystal or clock input frequency
ÎÎHCSL outputs, 0.7V Current mode differential pair
ÎÎJitter 40ps cycle-to-cycle (typ)
ÎÎSpread of -0.5%, -1.0%, -1.5%, and no spread
ÎÎAEC-Q100 qualified
ÎÎSpread Bypass option available
ÎÎSpread and frequency selection via external pins
ÎÎPackaging: (Pb-free and Green)
→20-pin, 173-mil wide TSSOP
PI6C557-05Q
PCIe® 2.0 Clock Generator with 4 HCSL Outputs
for Automotive Applications
Description
The PI6C557-05Q is a spread spectrum clock generator compli-
ant to PCI Express® 2.0 and Ethernet requirements. The device
is used for PC or embedded systems to substantially reduce
Electromagnetic Interference (EMI).
The PI6C557-05Q provides four differential (HCSL) or LVDS
spread spectrum outputs. The PI6C557-05Q 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 four pairs of differential outputs
(HCSL) at 100MHz and 200MHz clock frequencies. It also pro-
vides spread selection of -0.5%, -1.0%, -1.5%, and no spread.
Block Diagram
Pin Configuration
VDD PD OE
2
S[2:0] ³
Spread
Spectrum/
Output
clock
selection
SS Circuitry
25 MHz^X1/CLK
crystal
or clock _X2
Crystal
Driver
PCualpliancgitors
PLL
2
GND
Rr(IREF)
CLK0
CLK0
CLK1
CLK1
CLK2
CLK2
CLK3
CLK3
VDDXD
1
S0
2
S1
3
S2
4
X1
5
X2
6
PD
7
OE
8
GNDXD
9
IREF
10
20
CLK0
19
CLK0
18
CLK1
17
CLK1
16
GNDODA
15
VDDODA
14
CLK2
13
CLK2
12
CLK3
11
CLK3
All trademarks are property of their respective owners.
14-0063
www.pericom.com
PI6C557-05Q
Rev B
05/05/14
1