Pb
A product Line of
Diodes Incorporated
Lead-free Green
PI6C557-05B
PCIe® 3.0 Clock Generator with 4 HCSL Outputs
Description
Features
ÎÎ PCIe® 3.0 complaint
The PI6C557-05B is a spread spectrum clock generator compliant to
PCI Express® 3.0 and Ethernet requirements. The device is used for
PC or embedded systems to substantially reduce Electromagnetic
Interference (EMI).
• PCIe 3.0 Phase jitter: 0.48ps RMS (High Freq. Typ.)
ÎÎ LVDS compatible outputs
ÎÎ Supply voltage of 3.3V ±5%
ÎÎ 25MHz crystal or clock input frequency
ÎÎ HCSL outputs, 0.7V Current mode differential pair
ÎÎ Jitter 40ps cycle-to-cycle (typ)
ÎÎ Spread of -0.5%, -1.0%, -1.5%, and no spread
ÎÎ Industrial temperature range
ÎÎ Spread Bypass option available
ÎÎ Spread and frequency selection via external pins
ÎÎ Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
ÎÎ Halogen and Antimony Free. “Green” Device (Note 3)
ÎÎ For automotive applications requiring specific change control
(i.e. parts qualified to AEC-Q100/101/200, PPAP capable, and
manufactured in IATF 16949 certified facilities), please contact
us or your local Diodes representative.
The PI6C557-05B provides four differential (HCSL) or LVDS spread
spectrum outputs. The PI6C557-05B 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 provides spread selection
of -0.5%, -1.0%, -1.5%, and no spread.
https://www.diodes.com/quality/product-definitions/
ÎÎ Packaging: (Pb-free and Green)
• 20-pin, TSSOP (L)
Pin Configuration
Block Diagram
VDD
2
S[2:0]
3
Spread
Spectrum/
Output
clock
selection
OE
SS Circuitry
CLK0
CLK0
CLK1
CLK1
CLK2
CLK2
CLK3
CLK3
PLL
X1/CLK
25 MHz
Crystal
crystal
Driver
or clock X2
Pulling
Capacitors
PD
2
Rr(IREF)
VDDXD
1
20
CLK0
S0
2
19
CLK0
S1
3
18
CLK1
S2
4
17
CLK1
X1
5
16
GNDODA
X2
6
15
VDDODA
PD
7
14
CLK2
OE
8
13
CLK2
GNDXD
9
12
CLK3
10
11
CLK3
IREF
GND
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
