CY24293 Cypress Semiconductor, CY24293 Datasheet - Page 2

• Manufacturer Part Number: CY24293
• Description: Two Outputs PCI-Express Clock Generator
• Manufacturer: Cypress Semiconductor

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Pinouts
Table 1. Pin Definitions - CY24293 16-Pin TSSOP
Table 2. Output Selection Table
Table 3. Spread Selection Table
Document Number: 001-46117 Rev. *C
Pin Number
SS1
10
12
13
14
15
16
S1
11
1
2
3
4
5
6
7
8
9
0
0
1
1
0
0
1
1
S0
S1
SS0
XIN/EXCLKIN Input
XOUT
OE
GNDX
SS1
IREF
PCIE1N
PCIE1P
VDDO
GNDO
PCIE0N
PCIE0P
VDDX
Pin Name
SS0
S0
0
1
0
1
0
1
0
1
Input
Input
Input
Output
Input
Power
Input
Output
Output
Output
Input
Power
Output
Output
Input
Pin Type
XIN/EXCLKIN
PCIE0[N,P], PCIE1[N,P]
Figure 1. Pin Diagram - CY24293 16-Pin TSSOP
Frequency select pin. Has internal weak pull up. Refer to
Frequency select pin. Has internal weak pull up. Refer to
Spread Spectrum Select pin 0. Has internal weak pull up. Refer to
Crystal or clock input. 25 MHz fundamental mode crystal or clock input.
Crystal output. 25 MHz fundamental mode crystal input. Float for clock input.
High true output enable pin. When set low, PCI-E outputs are tri-stated. Has internal weak
pull up.
Ground
Spread Spectrum Select pin 1. Has internal weak pull up. Refer to
Current set for all differential clock drivers. Connect 475Ω resistor to ground.
Differential PCI-Express complementary clock output. Tristated when disabled.
Differential PCI-Express true clock output. Tristated when disabled.
3.3V Power supply for output driver and analog circuits.
Ground
Differential PCI-Express complementary clock output. Tristated when disabled.
Differential PCI-Express true clock output. Tristated when disabled.
3.3V Power supply for oscillator and digital circuits.
GNDX
XOUT
No Spread
No Spread
Spread%
SS1
100 MHz
125 MHz
200 MHz
25 MHz
SS0
-0.75%
OE
-0.5%
S0
S1
1
2
3
4
5
6
7
8
TSSOP
16
15
14
13
12
11
10
9
Description
VDDX
PCIE0P
PCIE0N
GNDO
VDDO
PCIE1P
PCIE1N
IREF
Table
Table
2.
2.
Table
Table
3.
3.
CY24293
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