CY25245OXC Cypress Semiconductor Corp, CY25245OXC Datasheet - Page 2

• Manufacturer Part Number: CY25245OXC
• Manufacturer: Cypress Semiconductor Corp

Specifications of CY25245OXC

• Lead Free Status / RoHS Status: Compliant

Document #: 38-07124 Rev. *B
Pin Definitions
Table 1. Frequency Configuration (Frequencies in MHz)
Pin Name Pin No. Pin Type
SSOUT
REFOUT
X2
SSON#
MW0:2
IR1:2
OR1:2
SCLK
SData
VDD
AVDD
GND
X1
Range of Fin Frequency
Min.
Power-down Hi-Z
14
14
14
25
25
25
50
50
50
Power-down 0
Power-down 1
Reserved
4, 11, 14
8, 13, 18
17, 16
12, 19
6, 9
15
20
10
1
2
7
5
3
Max.
41.7
41.7
41.7
83.3
83.3
83.3
166
166
166
I/O
O
O
G
P
P
I
I
I
I
I
I
I
Output Modulated Frequency. Frequency modulated copy of the input clock (SSON# asserted).
Non-modulated Output. This pin provides a copy of the reference frequency. This output will
not have the Spread Spectrum feature enabled regardless of the state of logic input SSON#.
Crystal Connection or External Reference Frequency Input. This pin has dual functions. It
may either be connected to an external crystal, or to an external reference clock.
Crystal Connection. Input connection for an external crystal. If using an external reference, this
pin must be left unconnected.
Spread Spectrum Control (Active LOW). Asserting this signal (active LOW) turns the internal
modulation waveform on. This pin has an internal pull-down resistor.
Modulation Width Selection. When Spread Spectrum feature is turned on, these pins are used
to select the amount of variation and peak EMI reduction that is desired on the output signal.
MW0:Down, MW1:Up, MW2:Down (see Table 2).
Reference Frequency Selection. The logic level provided at this input indicates to the internal
logic what range the reference frequency is in and determines the factor by which the device
multiplies the input frequency. Refer to Table 3. These pins have internal pull-up resistors.
Output Frequency Selection Bits. These pins select the frequency operation for the output.
Refer to Table 1. The OR2 pin has an internal pull-up resistor. The OR1 pin has internal pull-down
resistors.
Clock Pin for SMBus Circuitry.
Data Pin for SMBus Circuitry.
Power Connection. Connected to 3.3V or 5V power supply.
Analog Power Connection. Connected to 3.3V or 5V power supply.
Ground Connection. Connect all ground pins to the common ground plane.
OR2
Multiplier
0
1
1
0
1
1
0
1
1
0
0
0
0
Settings
OR1
1
0
1
1
0
1
0
1
0
0
0
0
1
Output/
Input
0.25
N/A
N/A
N/A
N/A
0.5
0.5
1
2
4
1
2
1
Range of Fout Required R Settings
Min.
N/A
N/A
N/A
N/A
14
28
56
13
25
50
13
25
50
Pin Description
Max.
41.7
83.3
41.7
83.3
41.7
83.3
166
166
166
N/A
N/A
N/A
N/A
As Set
As Set
As Set
As Set
IR2
0
0
0
1
1
1
1
1
1
As Set
As Set
As Set
As Set
IR1
1
1
1
0
0
0
1
1
1
Power-down Settings
MW2
1
1
0
0
Modulation and
Table 2
Table 2
Table 2
Table 2
Table 2
Table 2
Table 2
Table 2
Table 2
CY25245
Page 2 of 11
MW1
0
1
0
1
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