CY25568SXC Cypress Semiconductor Corp, CY25568SXC Datasheet - Page 6

• 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

Power Down (PD#)
CY25568 includes a Power Down (PD#, Pin 10) function. This input uses standard 2-Level CMOS logic and is internally pulled up to
VDD (HIGH). Connect this pin to GND if power is to be turned off.
Modulation Rate
Spread Spectrum Clock Generators use frequency modulation (FM) to distribute energy over a specific band of frequencies. The
maximum frequency of the clock (fmax) and minimum frequency of the clock (fmin) determine this band of frequencies. The time
required to transition from fmin to fmax and back to fmin is the period of the Modulation Rate, Tmod. The Modulation Rate of SSCG
clocks are generally referred to in terms of frequency or fmod = 1/Tmod.
The input clock frequency, fin, and the internal divider determine the Modulation Rate.
In the case of CY25568, the (Spread Spectrum) Modulation Rate is given by the following formula: fmod = fin/DR
Where; fmod is the Modulation Rate, fin is the Input Frequency and DR is the Divider Ratio as given in
Frequency Range is set by FRSEL.
Table 4. Modulation Rate
Document Number: 38-07111 Rev. *C
FRSEL
M
0
1
INPUT FREQUENCY RANGE (MHz)
16 to 32
8 to 16
4 to 8
DIVIDER RATIO (DR)
128
256
512
Table
4. Notice that Input
CY25568
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