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CY25402/CY25422/CY25482
Document #: 001-12565 Rev. *B
Page 2 of 10
Figure 1. Pin Diagram - CY25402 8-LD SOIC
Table 1. Pin Definition - CY25402 (2.5V, 3.0V or 3.3V Supply)
Pin Number
Name
IO
Description
1
XIN/EXCLKIN
Input
Crystal Input or 1.8V External Clock Input
2
VDD
Power
Power Supply: 2.5V, 3.0V or 3.3V
3
CLK1
Output
Programmable Clock Output with Spread Spectrum
4
REFOUT/FS0
Output/Input
Multifunction Programmable pin: Reference Clock Output or Frequency Select pin
5
PD#/OE/FS1
Input
Multifunction Programmable pin: Power Down, Output Enable or Frequency Select
pin
6
CLK2/SSON
Output/Input
Multifunction Programmable pin: Programmable Clock Output with Spread
Spectrum or Spread Spectrum ON/OFF control pin
7
GND
Power
Power Supply Ground
8
XOUT
Output
Crystal Output
VDD
CY25402
1
2
3
4
8
7
6
5
XOUT
GND
CLK2/SSON
PD#/OE/FS1
XIN/
EXCLKIN
CLK1
REFOUT/
FS0
Table 1. Device Selector Guide
Device
Crystal Input
EXCKLKIN Input
VDD
CY25402
Yes
1.8V LVCMOS
2.5V, 3.0V, 3.3V
CY25482
No
2.5V, 3.0V, 3.3V LVCMOS
2.5V, 3.0V, 3.3V
CY25422
Yes
1.8V LVCMOS
1.8V
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