
IDT5V41064
1 OUTPUT PCIE GEN1/2 SYNTHESIZER
IDT 1 OUTPUT PCIE GEN1/2 SYNTHESIZER
2
IDT5V41064
REV G 112111
Pin Assignment
Spread Spectrum Select Table
Pin Descriptions
1
16-pin QFN
5
9
13
GND
X1
X2
NC
GND
SS
1
IR
EF
NC
VD
D
CLK
GND
VDDA
SS1
Spread%
0
-0.5% down
1
No spread
Pin
Number
Pin
Name
Pin Type
Pin Description
1
GND
Power
Connect to ground.
2
X1
XI
Crystal or clock input. Connect to 25 MHz crystal or single-ended clock.
3
X2
XO
Crystal connection. Connect to parallel mode crystal. Leave floating if X1 is driven by
single-ended clock.
4
NC
–
No connect.
5
GND
Power
Connect to ground.
6
SS1
Input
Spread Select 1. See table above. Internal pull-up resistor.
7
IREF
Output
475
Ω precision resistor must be attached to this pin, which is connected to internal
current source.
8
NC
–
No connect.
9
VDDA
Power
Connect to 3.3V and filter as analog supply.
10
GND
Power
Connect to ground.
11
CLK
Output
HCSL complementary output clock.
12
CLK
Output
HCSL true output clock.
13
NC
–
No connect.
14
NC
–
No connect.
15
VDD
Power
Connect to 3.3 V for OSC and digital circuits.
16
NC
–
No connect.