SL16010DC

SL16010DC Low Jitter and Power Clock Generator with SSCG Key Features • • • • • • • • • • • • Description Low power dissipation - 13.5mA-typ CL=15pF - 18.0mA-max CL=15pF 3.3V +/-10% power supply range 27.000MHz crystal or clock input 27.000MHz REFCLK 100MHz SSCLK with SSEL0/1 spread options Low CCJ Jitter Low LT Jitter Internal Voltage Regulators 45% to 55% Output Duty Cycle On-chip Crystal Oscillator -10 to +85 Temperature Range 10-pin 3x3x0.75 mm TDFN package Application • • • • • • The SL16010DC is a low power dissipation spread spectrum clock generator using SLI proprietary low jitter PLL. The SL16010DC provides two output clocks. REFCLK (Pin-9) which is a buffered output of the 27.000MHz input crystal and SSCLK (Pin-5) which is synthesized as 100.000MHz nominal by an internal PLL using the 27.00MHz external input crystal or clock. In addition, SSEL0 (Pin-7) and SSEL1 (Pin-3) spread percent selection control inputs enable users to select from 0.0% (no spread) to -3.0% down spread at 100.000MHz SSCLK output to reduce and optimize system EMI levels. The SL16010DC operates in an extended temperature range of -10 to +85°C. Contact SLI for other programmable frequencies, Spread Spectrum Clock (SSC) options, as well as 2.5V+/-10 and 1.8V+/-5% power supply options. Video Cards NB and DT PCs HDTV and DVD-R/W Routers, Switches and Servers Data Communications Embeded Digital Applications Benefits • • • • EMI Reduction Improved Jitter Low Power Dissipation Eleminates external Xtals or XOs Block Diagram 9 REFCLK 27.000MHz 5 SSCLK 100.000MHz 300K XIN/CLKIN Low Jitter PLL With Modulation Control 1 XOUT 10 Input Decoder 4 VDD1 6 8 2 7 3 VSS1 VDD2 VSS2 SSEL0 SSEL1 Figure 1. Block Diagram Rev 2.6, August 1, 2010 400 West Cesar Chavez, Austin, TX 78701 Page 1 of 8 1+(512) 416-8500 1+(512) 416-9669 www.silabs.com SL16010DC Pin Configuration XOUT XIN/CLKIN 1 10 VSS2 2 9 REFCLK SSEL1 3 8 VDD2 VDD1 4 7 SSEL0 SSCLK 5 6 VSS1 Figure 2. 10-Pin TDFN (3x3x0.75 mm) Table 1. Pin Description Pin Number Pin Name Pin Type Pin Description 1 XIN/CLKIN Input 2 VSS2 Power 3 SSEL1 Input 4 VDD1 Power Positive power supply for 100.000MHz SSCLK output. 3.3V +/-10%. 5 SSCLK Output SSCLK clock output. 100.000MHz nominal. Refer to Table 5 for available spread % options by using SSEL0 and SSEL1 control pins. 6 VSS1 Power Power supply ground for 100.000MHz SSCLK output. 7 SSEL0 Input 8 VDD2 Power Positive power supply for 27.000MHz REFCLK output. 3.3V +/-10%. 9 REFCLK Output REFCLK clock output. 27.000MHz nominal. 10 XOUT Output Crystal output. Capacitance at this pin 4 pF-typ. If clock input is used, leave this pin not connected (N/C). Rev 2.6, August 1, 2010 External crystal or clock input. Capacitance at this pin is 4 pF-typ. Power supply ground for 27.000MHz REFCLK output. SSEL1 spread percent selection pin. Refer to Table 5 for available spread options using SSEL1 pin. Three state, Low (L), Middle (M) and High (H) digital input logic levels. This pin has 150kΩ-typ input pull down resistor. SSEL spread percent selection pin. Refer to Table 5 for available spread options using SSEL0 pin. Three state, Low (L), Middle (M) and High (H) digital input logic levels. This pin has 150kΩ-typ input pull down resistor. Page 2 of 8 SL16010DC Table 2. Absolute Maximum Ratings Description Condition Min Max Unit Supply voltage, VDD -0.5 4.2 V All Inputs and Outputs -0.5 VDD+0.5 V Ambient Operating Temperature In operation, extended C grade -10 85 °C Storage Temperature No power is applied -65 150 °C Junction Temperature In operation, power is applied - 125 °C - 260 °C Soldering Temperature ESD Rating (Human Body Model) JEDEC22-A114D -4,000 4,000 V ESD Rating (Charge Device Model) JEDEC22-C101C -1,500 1,500 V ESD Rating (Machine Model) JEDEC22-A115D -200 200 V Table 3. DC Electrical Characteristics (C-Grade) Unless otherwise stated VDD= 3.3V+/- 10%, CL=15pF and Ambient Temperature range -10 to +85Deg C Description Symbol Condition Min Typ Max Unit 2.97 3.3 3.63 V V Operating Voltage VDD1/2 Input Low Voltage VINL SSEL0 and SSEL1 0 - 0.2 Input Middle Voltage VINM SSEL0 and SSEL1 0.4VDD - 0.6VDD Input High Voltage VINH SSEL0 and SSEL1 0.9VDD - VDD V Input High Voltage VINH1 CMOS Level, Pin-1 If input is clock 0.7VDD - VDD V Input Low Voltage VINL1 CMOS Level, Pin-1 If input is clock 0 - 0.3VDD V - - 0.4 V VDD1=VDD2=3.3V +/-10% Output Low Voltage VOL IOL=15mA, Pins 5 and 9 Output High Voltage VOH IOH=-15mA , Pins 5 and 9 VDD-0.4 - - V Power Supply Current IDD SSEL=1, M or 0, CL=15pF, VDD=3.63V and T=85°C - 13.5 18.0 mA Input Capacitance CIN1 XIN and XOUT, Pins 1 and 10 - 4 - pF Input Capacitance CIN2 SSEL0/1, Pins 7 and 3 - 3 5 pF Load Capacitance CL SSCLK and REFCLK, Pins 5 and 9 - - 15 pF Pull Down Resistor RPD 100 150 250 kΩ Table 4. AC Electrical Characteristics (C-Grade) Unless otherwise stated VDD= 3.3V+/-10%, CL=15pF and Ambient Temperature range -10 to +85 Deg C Parameter Frequency Range Rev 2.6, August 1, 2010 Symbol FR-1 Condition Input crystal or clock range, +/-10 ppm crystal accuracy if a crystal is used Min Typ - 27.000 Max - Unit MHz Page 3 of 8 SL16010DC Frequency Range FR-2 REFCLK, Pin 9 - 27.000 - MHz Frequency Range FR-3 SSCLK, Pin 5 - 100.000 - MHz Frequency Accuracy FACC1 REFCLK, Pin 9 -30 +/-0 30 ppm Frequency Accuracy FACC2 SSCLK, Pin 5, SSEL0/1=0 -30 +/-0 30 ppm Rise and Fall Time TR/F-1 REFCLK, Pin 9, CL=5pF, measured from 20% to 80% of VDD - 1.0 1.5 ns Rise and Fall Time TR/F-2 REFCLK, Pin 9, CL=15pF, measured from 20% to 80% of VDD - 1.5 2.0 ns Rise and Fall Time TR/F-3 SSCLK, Pin 5, CL=5pF, measured from 20% to 80% of VDD - 0.75 1.0 ns Rise and Fall Time TR/F-4 SSCLK, Pin 5, CL=15pF, measured from 20% to 80% of VDD - 1.5 1.75 ns Output Duty Cycle DC SSCLK and REFCLK, Pins 5 and 9, measured at VDD/2, CL=15pF 45 50 55 % Cycle-to-Cycle Jitter CCJ SSCLK/REFCLK, Pins 5 and 9 - 125 200 ps Long Term Jitter LTJ REFCLK, Pins 9, 10,000 cycles - 130 300 ps Power-up Time (VDD) tPU1 Time from 0.9VDD to valid frequency at output Pins 5 and 9 - 2.0 5.0 ms Spread Percent Change Settling Time tSS% Time from SSEL0/1 change to stable SSCLK with spread % - - 1.0 ms Modulation Frequency MF 31 32 33 kHz - - 0.125 %/μs Modulation Type and Slew Rate FMTSR SSCLK, 100MHz nominal, Pin 5 SSCLK, Pin 5, Triangular Modulation Profile Table 5. SSEL1 and SSEL0 versus Spread % Selection at SSCLK SSEL1 (Pin 3) SSEL0 (Pin 7) Spread Percent (%) SSCLK (Pin 5) Low (VSS) Low (VSS) Spread Off (No Spread) Low (VSS) Middle (VDD/2) -0.50% Low (VSS) High (VDD) -2.5% Middle (VDD/2) Low (VSS) -0.25% Middle (VDD/2) Middle (VDD/2) -0.75% Middle (VDD/2) High (VDD) -1.0% High (VDD) Low (VSS) -1.5% High (VDD) Middle (VDD/2) -2.0% High (VDD) High (VDD) -3.0% Note: Middle (VDD/2) state requires 5kΩ/5kΩ external resistors as shown in Figure 3, page 5. Rev 2.6, August 1, 2010 Page 4 of 8 SL16010DC Table 6. Recommended Crystal Specifications Description Min Typ Max Unit Nominal Frequency (Fundamental Crystal) - 27.000 - MHz Crystal Accuracy - +/-10 - ppm Load Capacitance 8 12 18 pF Shunt Capacitance - - 7.0 pF Equivalent Series Resistance (ESR) - - 30 Ω Drive Level - - 1.0 mW VDD VDD 3-Level Logic LOW=VSS 3-Level Logic Middle=VDD/2 3-Level Logic HIGH=VDD 5KΩ 5KΩ SSEL0 or SSEL1 INPUT 7/3 SSEL0 or SSEL1 INPUT SSEL0 or SSEL1 INPUT 7/3 7/3 5KΩ VSS 5KΩ VSS HIGH (H) = VDD MIDDLE (M) = VDD/2 LOW (L) = VSS Figure 3. FSEL0 and FSEL1 Spread % Selection Logic Note: SSEL0 and SSEL1 pins use 3-Level L(LOW) = VSS, M(MIDDLE)=VDD/2 and H(HIGH) = VDD 3-Level logic to provide 9 spread % values at SSCLK (pin 5) as given in Table 5. Use 5kΩ/5kΩ external resistor divider at SSEL0 and SSEL1 pins from VDD to VSS to obtain VDD/2 for M=VDD/2 Logic level as shown above in Figure 3. Rev 2.6, August 1, 2010 Page 5 of 8 SL16010DC External Components and Design Considerations Typical Application Circuit VDD 10μF 0.1μF 0.1μF VDD1(4) VDD2(8) CL1 XIN(1) SSCLK(5) 27MHz 100MHz REFCLK(9) 27MHz XOUT(10) VDD CL2 SL16010DC External crystal load capacitors are required if crystal is used. If external clock (XO) is used leave Pin-10 XOUT unconnected (N/C) and drive Pin-1 XIN with clock. 5K This example is configured for -0.5% Spread SSEL0=M (VDD/2) and SSEL1=LOW (VSS) SSEL0(7) SSEL1(3) VSS1(6) VSS2(2) 5K 5K Figure 4. Typical Application Schematic Comments and Recommendations Crystal and Crystal Load: Only use a parallel resonant fundamental AT cut crystal. DO NOT USE higher overtone crystals. To meet the crystal initial accuracy specification (in ppm) make sure that external crystal load capacitor is matched to crystal load specification. To determine the value of CL1 and CL2, use the following formula; C1 = C2 = 2CL – (Cpin + Cp) Where: CL is load capacitance stated by crystal manufacturer Cpin is the SL16010 pin capacitance (4pF) Cp is the parasitic capacitance of the PCB traces. EXAMPLE; if a crystal with CL=12pF specification is used and Cp=1pF (parasitic PCB capacitance on PCB), 19 or 20pF external capacitors from pins XIN (pin-1) and XOUT (Pin-10) to VSS are required since CXIN=CXOUT=4pF for the SL1610DC product. Users must verify Cp value. Decoupling Capacitor: A decoupling capacitor of 0.1μF must be used between VDD1/2 pins and VSS1/2 pin. Place the capacitor on the component side of the PCB as close to the VDD1/2 pins as possible. The PCB trace to the VDD1/2 pins and to the VSS via should be kept as short as possible Do not use vias between the decoupling capacitor and the VDD1/2 pins. In addition, a 10uf capacitor should be placed between VDD and VSS. Series Termination Resistor: A series termination resistor is recommended if the distance between the outputs (REFCLK and SSCLK) and the load if PCB trace is over 1 ½ inch. The nominal impedance of the outputs is about 24 Ω. Use 22 Ω resistors in series with the outputs to terminate 50Ω trace impedance and place 22 Ω resistors as close to the clock outputs as possible. Rev 2.6, August 1, 2010 Page 6 of 8 SL16010DC Package Outline and Package Dimensions 10-Pin TDFN Package (3x3x0.75 mm) Dimentions are in mm 2.00+/-0.10 0.75+/-0.05 0.50 10 3.00+/-0.10 1.50+/-0.10 6 C: 0.25X45°C Pin #1 ID 5 1 0.00-0.05 3.00+/-0.10 Top View 0.30+/-0.05 0.25+/-0.05 Bottom View Side View 0° 0.20+/-0.025 Side View Table 7. Thermal Characteristics Parameter Thermal Resistance Junction to Ambient Thermal Resistance Junction to Case Rev 2.6, August 1, 2010 Symbol Condition Min Typ Max Unit θJA1 Still air - 75 - °C/W θJA2 1m/s air flow - 70 - °C/W θJA3 3m/s air flow - 55 - °C/W θJC Independent of air flow - 25 - °C/W Page 7 of 8 SL16010DC Table 8. Ordering Information Ordering Number Marking Shipping Package Package Temperature SL16010DC SL16010DC Tube 10-pin TDFN -10 to 85°C SL16010DCT SL16010DC Tape and Reel 10-pin TDFN -10 to 85°C Note: 1. SL16010DC is RoHS compliant and Halogen Free. Product Revisions History Revision Date Originator Description Rev 0.5 12/12/2009 C. Ozdalga Original. Rev 1.0 1/30/2009 C. Ozdalga Reduce IDD-max to 18 mA from 28 mA. Change Cxin/Cxot from 4 pF to 6 pF. Change R/R divider from 10Ω/10kΩ to 5kΩ/5kΩ. Add Pull-down resistors definition for SSEL0/1 pins on Pin Description Table. Improve Typical Application Circuit. Remove LTJ for SSCLK until new specification is obtained from customer. Rev 1.0 2/23/2009 C. Ozdalga Change 13.5mA-max to 15mA-typ (Key Features – Page-1) Rev 2.0 2/30/2009 C. Ozdalga Final production version revision number change to Rev 2.0. Rev 2.1 4/14/2009 C. Ozdalga Correct Page 7 package pin number typing error. Rev 2.2 4/22/2009 C. Ozdalga Page 3 CIN1, CXI/CXOUT pin capacitance changed to 4pF-typ from 6pF-typ. Rev 2.3 9/1/2009 C. Ozdalga Replace “floating” with “VDD/2” in table 5 on page 4 and add note under the same table 5 for clarification. Redo Figure 3 to clarify 3-Level Logic and add 5KΩ resistor from SSEL1 to VSS in Figure 4 on page 6. Change Table 1 to Table 5 on pin description table page 2 for SSEL1 and SSEL0 rows. Rev 2.4 9/3/2009 C. Ozdalga Replace “floating” with “VDD/2” in table 5 on page 4 under SSEL1. Rev 2.5 6/4/2010 C. Ozdalga Add clock input specifications. SL16010DC can be driven by an external crystal or clock. Rev 2.6 8/1/2010 C. Ozdalga Add Halogen Free, page 8. The information in this document is believed to be accurate in all respects at the time of publication but is subject to change without notice. Silicon Laboratories assumes no responsibility for errors and omissions, and disclaims responsibility for any consequences resulting from the use of information included herein. Additionally, Silicon Laboratories assumes no responsibility for the functioning of undescribed features or parameters. Silicon Laboratories reserves the right to make changes without further notice. Silicon Laboratories makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does Silicon Laboratories assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages. Silicon Laboratories products are not designed, intended, or authorized for use in applications intended to support or sustain life, or for any other application in which the failure of the Silicon Laboratories product could create a situation where personal injury or death may occur. Should Buyer purchase or use Silicon Laboratories products for any such unintended or unauthorized application, Buyer shall indemnify and hold Silicon Laboratories harmless against all claims and damages. Rev 2.6, August 1, 2010 Page 8 of 8