CY25568SXC Cypress Semiconductor Corp, CY25568SXC Datasheet - Page 2

• Manufacturer Part Number: CY25568SXC
• Description: IC CLOCK GEN 3.3V SS 16-SOIC
• Manufacturer: Cypress Semiconductor Corp
• Type: Clock/Frequency Synthesizer, Fanout Distribution, Frequency Modulator, Spread Spectrum Clock Generatorr

Specifications of CY25568SXC

• Number Of Circuits: 1
• Package / Case: 16-SOIC (3.9mm Width)
• Pll: Yes
• Input: Clock, Crystal, Resonator
• Output: Clock
• Ratio - Input:output: 1:4
• Differential - Input:output: No/No
• Frequency - Max: 128MHz
• Divider/multiplier: Yes/Yes
• Voltage - Supply: 2.9 V ~ 3.6 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Frequency-max: 128MHz
• Maximum Input Frequency: 32 MHz
• Minimum Input Frequency: 4 MHz
• Output Frequency Range: 4 MHz to 128 MHz
• Supply Voltage (max): 3.6 V
• Supply Voltage (min): 2.9 V
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: 0 C
• Mounting Style: SMD/SMT
• Operating Supply Voltage: 3.3 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 428-2224-5; CY25568SXC

Pinouts
Pin Definitions
General Description
The Cypress CY25568 is a Spread Spectrum Clock Generator
(SSCG) IC used for the purpose of reducing Electro Magnetic
Interference (EMI) found in today's high-speed digital electronic
systems.
The CY25568 uses a Cypress proprietary Phase-Locked Loop
(PLL) and Spread Spectrum Clock (SSC) technology to
synthesize and modulate the frequency of the digital clock. By
frequency modulating the clock, the measured EMI at the
fundamental and harmonic frequencies is greatly reduced.
This reduction in radiated energy can significantly reduce the
cost of complying with regulatory agency requirements and
improve time to market without degrading system performance.
The CY25568 input frequency range is 4 to 32 MHz and accepts
clock, crystal, and ceramic resonator inputs. The output clocks
can be programmed to produce 1x, 2x, and 4x multiplication of
Document Number: 38-07111 Rev. *C
Pin
10
11
12
13
14
15
16
1
2
3
4
5
6
7
8
9
Function
REFOUT
SSCLK1
SSCLK3
SSCLK2
Xin/CLK
FRSEL
XOUT
VDD
VDD
VSS
VSS
PD#
S1
S0
D0
D1
Clock, crystal or ceramic resonator input pin.
Power Supply Ground.
Power Supply Ground.
Digital Spread % control pin. 3-Level input (H-M-L). Default=M.
Digital Spread % control pin. 3-Level input (H-M-L). Default=M.
Output Clock. Refer to
Reference Clock Output. The same frequency as Xin/CLK input.
Output Clock. Refer to
Output Clock. Refer to
Power Down Control. Internally Pulled to VDD, Default=High.
Input Frequency Range Selection digital control input. 3-Level input (H-M-L). Default=M.
Positive Power Supply.
Positive Power Supply.
3-Level (H-M-L) Digital output clock scaling control. Refer to
3-Level (H-M-L) Digital output clock scaling control. Refer to
Crystal or ceramic resonator output pin.
XIN/CLKIN
REFOUT
SSCLK1
SSCK3
Figure 1. CY25568 - 16 Pin SOIC
VSS
VSS
S0
S1
Table 2
Table 2
Table 2
1
2
3
4
5
6
7
8
on page 4 for frequency programmability.
on page 4 for frequency programmability.
on page 4 for frequency programmability.
CY25568
the input frequency with Spread Spectrum. A separate
non-modulated reference clock is also provided.
The use of 2x or 4x frequency multiplication eliminates the need
for higher order crystals and allows the user to generate up to
128 MHz Spread Spectrum Clock (SSC) by using only first order
crystals. This reduces the cost while improving the system clock
accuracy, performance and complexity
Center Spread or Down Spread frequency modulation can be
selected by the user based on 4 discrete values of Spread % for
each Spread Mode with the option of a Non-Spread mode for
system test and verification purposes.
The CY25568 is available in a 16 pin SOIC (150-mil.) package
with a commercial operating temperature range of 0 to 70°C.
Contact Cypress for availability of
Temperature Range Operation. Refer to CY25811/12/14
products for 8-pin SOIC package versions of the CY25568.
Description
16
15
14
13
12
11
10
9
XOUT
D0
VDD
SSCLK2
D1
VDD
FRSEL
PD#
Table 2
Table 2
on page 4. Default=M.
on page 4. Default=M.
-25 to +85°C Industrial
CY25568
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