PRELIMINARY
CY28SRC02
PCI-Express Clock Generator
Features
• Two 100-MHz differential SRC clocks
• Low-voltage frequency select input
• I
2
C support with readback capabilities
• Ideal Lexmark Spread Spectrum profile for maximum
electromagnetic interference (EMI) reduction
• 3.3V power supply
• 20-pin TSSOP package
Block Diagram
VSS_SRC
VDD_SRC
SRCT2
SRCC2
SRCT1
SRCC1
VSS_SRC
VDD_SRC
VSS_SRC
IREF
Pin Configuration
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
VDD_SRC
SDATA
SCLK
NC
XOUT
XIN
VDD_REF
VSS_REF
VDDA
VSSA
XIN
XOUT
XTAL
OSC
PLL
PLL Ref Freq
Divider
Network
VDD_SRC
SRCT[2:1],SRCC[2:1]
IREF
20 TSSOP
SDATA
SCLK
I C
Logic
2
Rev 1.0, November 20, 2006
2200 Laurelwood Road, Santa Clara, CA 95054
Tel:(408) 855-0555
Fax:(408) 855-0550
Page 1 of 9
www.SpectraLinear.com
SPECTRALINEAR [ SPECTRALINEAR INC ]
