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Product Category: IC Chips
Manufacturer: Cypress Semiconductor Corp
  datasheetCY25100SXCF Datasheet
Package: SOP8
Quantity: 4171 PCS
Lead Free Status / RoHS Status: Lead free / RoHS Compliant
Moisture Sensitivity Level(MSL): 3(168 Hours)
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Manufacturer: Cypress Semiconductor Corp
Product Category: IC Chips
Series: -
Type: Fanout Buffer (Distribution), Spread Spectrum Clock Generator
Packaging: Tube Alternate Packaging
Package-Case: 8-SOIC (0.154", 3.90mm Width)
Operating-Temperature: 0°C ~ 70°C
Mounting-Type: Surface Mount
Voltage-Supply: 3.13 V ~ 3.45 V
Supplier-Device-Package: 8-SOIC
PLL: Yes
Input: CMOS, Crystal
Output: CMOS
Number-of-Circuits: 1
Ratio-Input:Output: 1899/12/30 1:02:00
Differential-Input:Output: No/No
Frequency-Max: 200MHz
Divider-Multiplier: Yes/No
Features, Applications

Field- and Factory-Programmable Spread Spectrum Clock Generator for EMI Reduction


Wide operating output (SSCLK) frequency range 3-200 MHz Programmable spread spectrum with nominal 31.5-kHz modulation frequency Center spread: to ±2.5% Down spread: to -5.0% Input frequency range External crystal: 8-30 MHz fundamental crystals External reference: 8-166 MHz Clock Integrated phase-locked loop (PLL) Field-programmable CY25100SCF and CY25100SIF, 8-pin SOIC CY25100ZCF and CY25100ZIF, 8-pin TSSOP Programmable crystal load capacitor tuning array Low cycle-to-cycle jitter 3.3V operation Commercial and Industrial operation Spread Spectrum On/Off function Power-down or Output Enable function

Services most PC peripherals, networking, and consumer applications. Provides wide range of spread percentages for maximum electromagnetic interference (EMI) reduction, to meet regulatory agency electromagnetic compliance (EMC) requirements. Reduces development and manufacturing costs and time-to-market. Eliminates the need for expensive and difficult to use higher-order crystals. Internal PLL to generate to 200-MHz output. Able to generate custom frequencies from an external crystal or a driven source. In-house programming of samples and prototype quantities is available using the CY3672 programming kit and CY3690 (TSSOP) or CY3691 (SOIC) socket adapter. Production quantities are available through Cypress's value-added distribution partners or by using third-party programmers from BP Microsystems, HiLo Systems, and others. Enables fine-tuning of output clock frequency by adjusting CLoad of the crystal. Eliminates the need for external CLoad capacitors. Suitable for most PC, consumer, and networking applications Application compatibility in standard and low-power systems Provides ability to enable or disable spread spectrum with an external pin. Enables low-power state or output clocks to High-Z state.

Pin VDD XOUT XIN/CLKIN PD#/OE Name 3.3V power supply. Crystal output. Leave this pin floating if external clock is used. Crystal input or reference clock input. Power-down pin: Active LOW. If PD# = 0, the PLL and Xtal are powered down, and outputs are weakly pulled low. Output Enable pin: Active HIGH. = 1, SSCLK and REFCLK are enabled. User has the option of choosing either PD# or OE function. Power supply ground. Buffered reference output. Spread spectrum clock output. Spread spectrum control. 0 = Spread on. 1 = Spread off. The spread% is programmed to either center spread or down spread with various spread percentages. The range for center spread is from to ±2.50%. The range for down spread is from to -5.0%. Contact the factory for smaller or larger spread % amounts if required. The input to the CY25100 can be either a crystal or a clock signal. The input frequency range for crystals is 8-30 MHz, and for clock signals is 8-166 MHz. The CY25100 has two clock outputs, REFCLK and SSCLK. The non-spread spectrum REFCLK output has the same frequency as the input of the CY25100. The frequency modulated SSCLK output can be programmed from 3-200 MHz. The CY25100 products are available an 8-pin SOIC and TSSOP packages with commercial and industrial operating temperature ranges. Description

The is a Spread Spectrum Clock Generator (SSCG) IC used for the purpose of reducing EMI found in today's high-speed digital electronic systems. The device uses a Cypress proprietary PLL and Spread Spectrum Clock (SSC) technology to synthesize and modulate the frequency of the input clock. By frequency modulating the clock, the measured EMI at the fundamental and harmonic frequencies are greatly reduced. This reduction in radiated energy can significantly reduce the cost of complying with regulatory agency (EMC) requirements and improve time-to-market without degrading system performance. The CY25100 uses a factory/field-programmable configuration memory array to synthesize output frequency, spread%, crystal load capacitor, reference clock output on/off, spread spectrum on/off function and PD#/OE options. Table 1. Pin Function Pin Name Pin# Unit Program Value Input Frequency XIN and XOUT 3 and 2 MHz Total Xtal Load Capacitance XIN and XOUT 3 and 2 pF Output Frequency SSCLK 7 MHz ENTER DATA

Spread Percent Intervals) SSCLK 7 % ENTER DATA

Power-down or Output Enable PD#/OE 4 Select PD# or OE ENTER DATA

Field-Programmable CY25100 The CY25100 is programmed at the package level, i.e., in a programmer socket. The CY25100 is flash-technology based, so the parts can be reprogrammed to 100 times. This allows for fast and easy design changes and product updates, and eliminates any issues with old and out-of-date inventory. Samples and small prototype quantities can be programmed on the CY3672 programmer with CY3690 (TSSOP) or CY3691 (SOIC) socket adapter. CyberClocks Online Software CyberClocks Online Software is a web-based software application that allows the user to custom-configure the CY25100. All the parameters in Table 1 given as "Enter Data" can be programmed into the CY25100. CyberClocks Online outputs an industry-standard JEDEC file used for programming the CY25100. For information regarding Spread Spectrum software programming solutions, please contact your local Cypress Sales or Field Application Engineer (FAE), representative for details. CY3672 FTG Programming Kit and CY3690/CY3691 Socket Adapter The Cypress CY3672 FTG programmer and CY3690/CY3691 Socket Adapter are needed to program the CY25100. The CY3690 enables user to program CY25100ZCF and CY25100ZIF (TSSOP) and CY3691 gives the user the ability to program CY25100SCF and CY25100SIF (SOIC). Each socket adapter comes with small prototype quantities of CY25100. The is a separate orderable item, so the existing users of the CY3672 FTG development kit or CY3672-PRG programmer need to order only the socket adapters to program the CY25100. Factory-Programmable CY25100 Factory programming is available for volume manufacturing by Cypress. All requests must be submitted to the local Cypress Field Application Engineer (FAE) or sales representative. A sample request form (refer to "CY25100 Sample Request Form" at must be completed. Once the request has been processed, you will receive a new part number, samples, and data sheet with the programmed values. This part number will be used for additional sample requests and production orders. Additional information on the CY25100 can be obtained from the Cypress web site at

Input Frequency (XIN, pin 3 and XOUT, pin 2) The input to the CY25100 can be a crystal or a clock. The input frequency range for crystals to 30 MHz, and for clock signals to 166 MHz. CXIN and CXOUT (pin 3 and pin 2) The load capacitors at Pin 1 (CXIN) and Pin 8 (CXOUT) can be programmed from 60 pF with 0.5-pF increments. The programmed value of these on-chip crystal load capacitors are the same (XIN = XOUT to 60 pF). The required values of CXIN and CXOUT can be calculated using the following formula: CXIN = CXOUT - CP where CL is the crystal load capacitor as specified by the crystal manufacturer and CP is the parasitic PCB capacitance. For example, if a fundamental 16-MHz crystal with 16-pF is used and is 2 pF, CXIN and CXOUT can be calculated as: CXIN = CXOUT (2 x pF. If using a driven reference, set CXIN and CXOUT to the minimum value 12 pF. Output Frequency, SSCLK Output (SSCLK, pin 7) The modulated frequency at the SSCLK output is produced by synthesizing the input reference clock. The modulation can be stopped by SSON# digital control input (SSON# = HIGH, no modulation). If modulation is stopped, the clock frequency is the nominal value of the synthesized frequency without modulation (spread = 0). The range of synthesized clock is from 3-200 MHz. Spread Percentage (SSCLK, pin 7) The SSCLK spread can be programmed at any percentage value from to ±2.5% for Center Spread and from to -5.0% Down Spread. Reference Output (REFOUT, pin 6) The reference clock output has the same frequency and the same phase as the input clock. This output can be programmed to be enabled (clock on) or disabled (High-Z, clock off). If this output is not needed, it is recommended that users request the disabled (High-Z, Clock Off) option. Frequency Modulation The frequency modulation is programmed at 31.5 kHz for all SSCLK frequencies from to 200 MHz. Contact the factory if a higher-modulation frequency is required. Power-down or Output Enable (PD# or OE, pin 4): The part can be programmed to include either PD# or OE function. PD# function powers down the oscillator and PLL. The OE function disables the outputs.

Search Part number : "CY251" Included word is 15
Part Number Manufacturer Package Quantity Description
CY25100SXC CY SOP8 468
CY25104ZXC-1 CY MSOP-8 3390
CY25104ZXC-1T CY TSOP-8L 3560
CY25100SXC-004AT CY S0-8 9680
CY25104ZXC-2 CYRESS SOP-8 3560
CY25100SXC-018AT CYPRESS SOP 13756
CY2510ZC-1 CY SSOP-24 93
CY25100SXC-048T Cypress Semiconductor Corp SOP8 3944 IC CLOCK GENERATOR
CY2510ZC-1T CY SSOP24 5480
CY2510ZXC-1T Cypress Semiconductor Corp 24-TSSOP (0.173", 4.40mm Width) 2172 IC CLK ZDB 11OUT 140MHZ 24TSSOP
CY25100SXC-060T CY SO-8 3560
CY25100SXC-064T Cypress Semiconductor Corp SO-8 3560 IC CLOCK GENERATOR
CY25100SXCF-100 CY SOP8 2980
CY25100SXCFT Cypress Semiconductor Corp 8-SOIC (0.154", 3.90mm Width) 96500 IC CLOCK GEN PROG 8-SOIC
  • CY25100SXC
  • CY25104ZXC-1
  • CY25100SXC-003AT
  • CY25104ZXC-1T
  • CY25100SXC-004AT
  • CY25104ZXC-2
  • CY25100SXC-018AT
  • CY2510ZC-1
  • CY25100SXC-048T
  • CY2510ZC-1T
  • CY2510ZXC-1T
  • CY25100SXC-060T
  • CY25100SXC-064T
  • CY25100SXCF-100
  • CY25100SXCFT
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