CY26121 PacketClock™ Spread Spectrum Clock Generator Features Benefits ■ Integrated phase-locked loop (PLL) ■ ■ Low jitter, high-accuracy outputs High-performance PLL tailored for Spread Spectrum application ■ 3.3V operation ■ Meets critical timing requirements in complex system designs ■ 25-MHz input frequency ■ Enables application compatibility ■ 66.66-MHz or 33.33-MHz selectable output frequency (orig, -3,-11,-31) ■ Works with commonly available crystal or driven reference ■ Downspread Spread Spectrum with 30-kHz nominal modulation frequency ■ 33.33-MHz or 25-MHz selectable output frequency (-2,-21) Table 1. Frequency Table for CLKA-D Part Number CLKSEL=0 CLKSEL=1 Spread% Parallel Crystal Load CY26121 66.66 MHz 33.33 –2.8% 6 pF CY26121-2 33.33 MHz 25.00 –2.8% 6 pF CY26121-3 66.66 MHz 33.33 –1.4% 6 pF CY26121-11 66.66 MHz 33.33 –2.8% 15 pF CY26121-21 33.33 MHz 25.00 –2.8% 15 pF CY26121-31 66.66 MHz 33.33 –1.4% 15 pF Logic Block Diagram VDDL 25 MHz XIN PLL OSC. CLKA with Modulation Control XOUT SSON CLKB CLKC OUTPUT MULTIPLEXER AND DIVIDERS Flash Configuration CLKD VSSL CLKSEL REF VDD Cypress Semiconductor Corporation Document #: 38-07350 Rev. *A • AVDD AVSS VSS 198 Champion Court • San Jose, CA 95134-1709 • 408-943-2600 Revised May 22, 2008 [+] Feedback CY26121 Pin Configuration Figure 1. CY26121, 16-pin TSSOP XOUT XIN 1 16 VDD 2 15 NC AVDD CLKSEL 3 14 REF 4 13 VSS AVSS 5 12 VSSL 6 11 CLKD VDDL CLKA 7 10 SSON CLKB 8 9 CLKC Table 2. Pin Definitions Name Pin Number Description XIN 1 Reference input Or Crystal Input VDD 2 3.3V Voltage Supply AVDD 3 3.3V Analog Voltage CLKSEL 4 (orig., -11,-3,-31) 0 = 66.66MHz out, 1 = 33.33 MHz Out. Weak pull up. CLKSEL 4 (-2, -21) 0 = 33.33MHz out, 1 = 25 MHz Out. Weak pull up. AVSS 5 Analog Ground VSSL 6 CLK Ground CLK(A:D) 7,8,9,12 Clock Outputs at VDDL level SSON 10 Spread Spectrum Enable pin 0 = SS off; 1 = SS on. Weak pull up. VDDL 11 3.3V Clock Voltage Supply VSS 13 Ground REF 14 Reference Output at VDD Level NC 15 No Connect XOUT[1] 16 Crystal Output Document #: 38-07350 Rev. *A Page 2 of 7 [+] Feedback CY26121 Maximum Ratings Exceeding maximum ratings may impair the useful life of the device. These user guidelines are not tested. Data Retention at Tj = 125°C ................................> 10 years Supply Voltage (VDD, AVDD, VDDL) ................... –0.5 to +7.0V Package Power Dissipation...................................... 350 mW DC Input Voltage ......................................–0.5V to VDD + 0.5 Static Discharge Voltage.......................................... > 2000V (per MIL-STD-883, Method 3015) Storage Temperature (Non-condensing) ....................................... –55°C to +125°C Junction Temperature ................................ –40°C to +125°C Recommended Operating Conditions Parameter Description Min Typ. Max Unit VDD, AVDD Supply voltage 3.135 3.30 3.465 V VDDL Supply voltage for CLK (A-D) 3.135 3.30 3.465 V TA Ambient temperature (commercial temp. grade) TA Ambient Temperature (industrial temp grade) CLOAD Max. output load capacitance Fref Reference frequency 0 70 °C -40 85 °C 15 pF 25 MHz Crystal Specification[2] Parameter Name Min Typ CRload Crystal load capacitance (original, -2, -3) 6 CRload Crystal load capacitance (-11,-21,-31) 15 ESR Equivalent series resistance Max Unit pF pF Ω 50 DC Electrical Specifications Parameter Description Condition Min Typ. Max Unit IOH Output High Current VOH = VDD – 0.5, VDD/VDDL=3.3V 12 24 mA IOL Output Low Current VOL = 0.5, VDD/VDDL = 3.3V 12 24 mA IIH Input High Current VIH = VDD IIL Input Low Current VIL = 0V VIH Input High Voltage CMOS levels VIL Input Low Voltage CMOS levels CIN[3] Input Capacitance Input pins excluding XIN RUP[3] Pull up resistor on input pins VDD = 3.14 to 3.47V, measured at VIN = 0V Supply Current AVDD/VDD/VDDL Current. IDD 5 10 μA 50 μA 0.3 VDD 0.7 80 VDD 7 pF 100 150 kΩ 42 60 mA Notes 1. Float XOUT if XIN is externally driven. 2. A fundamental parallel resonant crystal must be used Document #: 38-07350 Rev. *A Page 3 of 7 [+] Feedback CY26121 AC Electrical Specifications [3] Parameter Description Condition Min Typ. Max 55 Unit DC Output Duty Cycle Duty Cycle is defined in Figure 2, 50% of VDD 45 50 ER Rising Edge Rate Output Clock Edge Rate, Measured from 20% to 80% of VDD, CLOAD = 15 pF See Figure 3. 0.8 1.4 V/ns EF Falling Edge Rate Output Clock Edge Rate, Measured from 80% to 20% of VDD, CLOAD = 15 pF See Figure 3. 0.8 1.4 V/ns RMS Clock Cycle-to-Cycle Jitter RMS cycle-to-cycle jitter with Spread on. Measured at VDD/2. tj 15 40 % ps Voltage and Timing Definitions Figure 2. Duty Cycle Definition t1 t2 VDD 50% of VDD Clock Output 0V Figure 3. ER = (0.6 x VDD) /t3, EF = (0.6 x VDD) /t4 t3 t4 V DD 80% of V DD Clock Output 20% of V DD 0V Note 3. Guaranteed by Characterization, not 100% tested. Document #: 38-07350 Rev. *A Page 4 of 7 [+] Feedback CY26121 Ordering Information Ordering Code Package Type Operating Range CY26121ZC[4] 16-pin TSSOP Commercial, 0°C to 70°C CY26121ZCT[4] 16-pin TSSOP – Tape and Reel Commercial, 0°C to 70°C CY26121ZI[4] 16-pin TSSOP Industrial, –40°C to 85°C 16-pin TSSOP – Tape and Reel Industrial, –40°C to 85°C 16-pin TSSOP Commercial, 0°C to 70°C 16-pin TSSOP – Tape and Reel Commercial, 0°C to 70°C 16-pin TSSOP Industrial, –40°C to 85°C CY26121ZIT [4] CY26121ZC-2[4] CY26121ZC-2T [4] CY26121ZI-2[4] CY26121ZI-2T [4] 16-pin TSSOP – Tape and Reel Industrial, –40°C to 85°C CY26121ZC-3[4] 16-pin TSSOP Commercial, 0°C to 70°C CY26121ZC-3T[4] 16-pin TSSOP – Tape and Reel Commercial, 0°C to 70°C CY26121ZI-3[4] 16-pin TSSOP Industrial, –40°C to 85°C CY26121ZI-3T[4] 16-pin TSSOP – Tape and Reel Industrial, –40°C to 85°C CY26121ZC-11[4] 16-pin TSSOP Commercial, 0°C to 70°C CY26121ZC-11T[4] 16-pin TSSOP – Tape and Reel Commercial, 0°C to 70°C CY26121ZC-21[4] 16-pin TSSOP Commercial, 0°C to 70°C CY26121ZC-21T[4] 16-pin TSSOP – Tape and Reel Commercial, 0°C to 70°C CY26121ZI-21[4] 16-pin TSSOP Industrial, –40°C to 85°C CY26121ZI-21T[4] 16-pin TSSOP – Tape and Reel Industrial, –40°C to 85°C CY26121ZC-31[4] 16-pin TSSOP Commercial, 0°C to 70°C CY26121ZC-31T[4] 16-pin TSSOP – Tape and Reel Commercial, 0°C to 70°C CY26121KZC-21 16-pin TSSOP Commercial, 0°C to 70°C CY26121KZC-21T 16-pin TSSOP – Tape and Reel Commercial, 0°C to 70°C CY26121KZI-21 16-pin TSSOP Industrial, –40°C to 85°C CY26121KZI-21T 16-pin TSSOP – Tape and Reel Industrial, –40°C to 85°C CY26121ZXC-21[4] 16-pin TSSOP Commercial, 0°C to 70°C CY26121ZXC-21T[4] 16-pin TSSOP – Tape and Reel Commercial, 0°C to 70°C CY26121ZXI-21[4] 16-pin TSSOP Industrial, –40°C to 85°C CY26121ZXI-21T[4] 16-pin TSSOP – Tape and Reel Industrial, –40°C to 85°C CY26121KZXC-21 16-pin TSSOP Commercial, 0°C to 70°C CY26121KZXC-21T 16-pin TSSOP – Tape and Reel Commercial, 0°C to 70°C CY26121KZXI-21 16-pin TSSOP Industrial, –40°C to 85°C CY26121KZXI-21T 16-pin TSSOP – Tape and Reel Industrial, –40°C to 85°C Pb-Free Note 4. Not recommended for new designs. Document #: 38-07350 Rev. *A Page 5 of 7 [+] Feedback CY26121 Package Drawing and Dimensions Figure 4. 16-lead Thin Shrunk Small Outline Package (4.40 MM Body) Z16 51-85091-** Parameter Inches Millimeters Min Nom. Max Min Nom. A – – 0.047 – – Max. 1.20 A1 0.002 – 0.006 0.05 – 0.15 A2 0.031 0.039 0.041 0.80 1.00 1.05 B 0.007 – 0.012 0.19 – 0.30 C 0.004 – 0.008 0.09 – 0.20 D 0.193 0.197 0.201 4.90 5.00 5.10 E 0.169 0.173 0.177 4.30 4.40 4.50 H 0.244 0.252 0.260 6.20 6.40 6.60 L 0.018 0.024 0.030 0.45 0.60 0.75 a 0° – 8° 0° – 8° e 0.026 BSC Document #: 38-07350 Rev. *A 0.65 BSC Page 6 of 7 [+] Feedback CY26121 Document History Page Document Title: CY26121 PacketClock™ Spread Spectrum Clock Generator Document Number: 38-07350 REV. ECN NO. Issue Date Orig. of Change ** 121669 02/11/03 CKN *A 2440886 See ECN KVM/AESA Updated template. Added Note “Not recommended for new designs.” Added part numbers CY26121ZXC-21, CY26121ZXC-21T, CY26121ZXI-21, and CY26121ZXI-21T in ordering information table. Added part numbers CY26121KZC-21, CY26121KZC-21T, CY26121KZI-21, and CY26121KZI-21T. Added part numbers CY26121KZXC-21, CY26121KZXC-21T, CY26121KZXI-21, and CY26121KZXI-21T. Removed part numbers CY26121ZI-11, CY26121ZI-11T, CY26121ZI-31 and CY26121ZI-31T Description of Change New Data Sheet Sales, Solutions, and Legal Information Worldwide Sales and Design Support Cypress maintains a worldwide network of offices, solution centers, manufacturer’s representatives, and distributors. To find the office closest to you, visit us at cypress.com/sales. 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Furthermore, Cypress does not authorize its products for use as critical components in life-support systems where a malfunction or failure may reasonably be expected to result in significant injury to the user. The inclusion of Cypress products in life-support systems application implies that the manufacturer assumes all risk of such use and in doing so indemnifies Cypress against all charges. Any Source Code (software and/or firmware) is owned by Cypress Semiconductor Corporation (Cypress) and is protected by and subject to worldwide patent protection (United States and foreign), United States copyright laws and international treaty provisions. Cypress hereby grants to licensee a personal, non-exclusive, non-transferable license to copy, use, modify, create derivative works of, and compile the Cypress Source Code and derivative works for the sole purpose of creating custom software and or firmware in support of licensee product to be used only in conjunction with a Cypress integrated circuit as specified in the applicable agreement. Any reproduction, modification, translation, compilation, or representation of this Source Code except as specified above is prohibited without the express written permission of Cypress. Disclaimer: CYPRESS MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARD TO THIS MATERIAL, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. Cypress reserves the right to make changes without further notice to the materials described herein. Cypress does not assume any liability arising out of the application or use of any product or circuit described herein. Cypress does not authorize its products for use as critical components in life-support systems where a malfunction or failure may reasonably be expected to result in significant injury to the user. The inclusion of Cypress’ product in a life-support systems application implies that the manufacturer assumes all risk of such use and in doing so indemnifies Cypress against all charges. Use may be limited by and subject to the applicable Cypress software license agreement. Document #: 38-07350 Rev. *A Revised May 22, 2008 Page 7 of 7 All products and company names mentioned in this document may be the trademarks of their respective holders. [+] Feedback