ICS7152M-12

DATASHEET ICS7152 SPREAD SPECTRUM CLOCK GENERATOR Description Features The ICS7152-01, -02, -11, and -12 are clock generators for EMI (Electro Magnetic Interference) reduction (see below for frequency ranges and multiplier ratios). Spectral peaks can be attenuated by slightly modulating the oscillation frequency. Both down and center spread profiles are selectable. Center spread maintains an average frequency equal to an unspread clock. Down spread meets maximum frequency specs over the entire modualtion cycle. • • • • • Operating voltage of 3.3 V ±0.3 V Packaged in 8-pin SOIC Input frequency range of 16.6 to 134.0 MHz Output frequency range of 16.6 to 134.0 MHz Provides a spread spectrum clock output (±0.5%, ±1.5% center spread; -1.0%, -3.0% down spread) • Advanced, low-power CMOS process • Industrial temperature range available • Pb (lead) free package, RoHS compliant Block Diagram VDD SEL PLL Clock Synthesis and Spread Spectrum Circuitry FREQ XENS CKOUT XIN Clock Buffer/ Crystal Ocsillator XOUT External caps required with crystal for accurate tuning of the clock GND Product Lineup Product Input Frequency Range ICS7152M-01, ICS7152MI-01 16.6 MHz to 67 MHz ICS7152M-02, ICS7152MI-02 40.0 MHz to 134.0 MHz ICS7152M-11, ICS7152MI-11 16.6 MHz to 67.0 MHz ICS7152M-12, ICS7152MI-12 40.0 MHz to 134.0 MHz IDT® SPREAD SPECTRUM CLOCK GENERATOR 1 Modulation Type Modulation Enable Pin Down spread Yes Center spread ICS7152 REV K 062911 ICS7152 SPREAD SPECTRUM CLOCK GENERATOR SSCG Pin Assignment SEL Modulation Rate Setting Table XIN 1 8 XENS XOUT 2 7 FREQ GND 3 6 VDD SEL 4 5 CKOUT SEL Pin 4 (note1) Spread Direction Spread Percentage (%) Part Number 0 Center ±0.5 Down -1.0 Center ±1.5 Down -3.0 ICS7152M-11, ICS7152M-12 ICS7152M-01, ICS7152M-02 ICS7152M-11, ICS7152M-12 ICS7152M-01, ICS7152M-02 1 8 pin (150 mil) SOIC Modulation Enable Setting Table XENS Pin 8 Spread Spectrum 0 ON 1 OFF Frequency Setting Table FREQ Pin 7 Frequency 0 16.6 to 40 MHz 40 to 80 MHz 1 33 to 67 MHz 66 to 134 MHz ICS7152M-01, ICS7152M-11 ICS7152M-02, ICS7152M-12 ICS7152M-01, ICS7152M-11 ICS7152M-02, ICS7152M-12 Pin Descriptions Pin Number Pin Name Pin Type 1 XIN Input 2 XOUT Output Crystal resonator connection pin. 3 GND Power Connect to ground. 4 SEL Input Modulation rate setting pin. 5 CKOUT Output Modulated clock output pin. 6 VDD Power Connect to +3.3 V. 7 FREQ Input Frequency setting pin. 8 XENS Input Modulation enable setting pin. IDT® SPREAD SPECTRUM CLOCK GENERATOR Pin Description Crystal resonator connection pin/clock input pin. 2 ICS7152 REV K 062911 ICS7152 SPREAD SPECTRUM CLOCK GENERATOR SSCG External Components Spread Spectrum Profile The ICS7152 low EMI clock generator uses a triangular frequency modulation profile for optimal down stream tracking of zero delay buffers and other PLL devices. The frequency modulation amplitude is constant with variations of the input frequency. The ICS7152 requires a minimum number of external components for proper operation. Decoupling Capacitor A decoupling capacitor of 0.01µF must be connected between GND and VDD on pin 6, as close to this pin as possible. For optimum device performance, the decoupling capacitor should be mounted on the component side of the PCB. Avoid the use of vias in the decoupling circuit. Modulation Rate Series Termination Resistor Frequency Series termination should be used on the clock output. To series terminate a 50Ω trace (a commonly used trace impedance) place a 27Ω resistor in series with the clock line, as close to the clock output pin as possible. The nominal impedance of the clock output is 25Ω. Time PCB Layout Recommendations For optimum device performance and lowest output phase noise, the following guidelines should be observed. 1) An optimum layout is one with all components on the same side of the board, minimizing vias through other signal layers. Other signal traces should be routed away from the ICS7152. This includes signal traces just underneath the device, or on layers adjacent to the ground plane layer used by the device. Crystal Information The crystal used should be a fundamental mode, parallel resonant. Crystal capacitors should be connected from pins X1 to ground and X2 to ground to optimize the initial accuracy. The value of these capacitors is given by the following equation: Crystal caps (pF) = (CL - 6) x 2 In the equation, CL is the crystal load capacitance. So, for a crystal with a 16 pF load capacitance, two 20 pF [(16-6) x 2] capacitors should be used. IDT® SPREAD SPECTRUM CLOCK GENERATOR 3 ICS7152 REV K 062911 ICS7152 SPREAD SPECTRUM CLOCK GENERATOR SSCG Absolute Maximum Ratings Stresses above the ratings listed below can cause permanent damage to the ICS7152. These ratings, which are standard values for IDT commercially rated parts, are stress ratings only. Functional operation of the device at these or any other conditions above those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods can affect product reliability. Electrical parameters are guaranteed only over the recommended operating temperature range. Item Rating Supply Voltage, VDD 7V All Inputs and Outputs (referenced to GND) -0.5 V to VDD+0.5 V Ambient Operating Temperature -40 to +85° C Storage Temperature -55 to +125° C Junction Temperature -40 to +125° C Soldering Temperature 260° C Overshoot (VIOVER) VDD + 1.0 V (tOVER < 50 ns) max Undershoot (VIUNDER) GND - 1.0 V (tUNDER < 50 ns) min Overshoot/Undershoot tUNDER < 50 ns VIOVER < VDD + 1.0 V VDD Input pin GND VIUNDER < GND - 1.0 V tOVER < 50 ns Recommended Operation Conditions Parameter Min. Ambient Operating Temperature -40 Power Supply Voltage (measured in respect to GND) +3.0 IDT® SPREAD SPECTRUM CLOCK GENERATOR 4 Typ. 3.3 Max. Units +85 °C 3.6 V ICS7152 REV K 062911 ICS7152 SPREAD SPECTRUM CLOCK GENERATOR SSCG DC Electrical Characteristics Unless stated otherwise, VDD = 3.3 V ±0.3 V, Ambient Temperature -40 to +85° C Parameter Symbol Conditions Min. Typ. Max. Units 3.0 3.3 3.6 V 14 28 mA Operating Voltage VDD Supply Current IDD No load, at 3.3 V Input High Voltage VIH SEL, FREQ, XENS VDD x 0.8 VDD + 0.3 V XIN, Input slew rate 3 V/ns, 16.6 to 100 MHz VDD x 0.8 VDD + 0.3 V XIN, Input slew rate 3 V/ns, 100 to 134 MHz VDD x 0.9 VDD + 0.3 V SEL, FREQ, XENS GND VDD x 0.20 V XIN, Input slew rate 3 V/ns, 16.6 to 100 MHz GND VDD x 0.20 V XIN, Input slew rate 3 V/ns, 100 to 134 MHz GND VDD x 0.10 V Input Low Voltage VIL Output High Voltage VOH CKOUT, IOH = -4 mA VDD - 0.5 VDD V Output Low Voltage VOL CKOUT, IOL = 4 mA GND 0.4 V Input Capacitance CIN XIN, SEL, XENS 16 pF CKOUT, 16.6 to 67 MHz 15 pF CKOUT, 67 to 100 MHz 10 pF CKOUT, 100 to 134 MHz 7 pF Load Capacitance Output Impedance CL ZO IDT® SPREAD SPECTRUM CLOCK GENERATOR CKOUT, 16.6 to 134 MHz 5 Ω 25 ICS7152 REV K 062911 ICS7152 SPREAD SPECTRUM CLOCK GENERATOR SSCG AC Electrical Characteristics Unless stated otherwise, VDD = 3.3 V ±0.3 V, Ambient Temperature -40 to +85° C Parameter Symbol Conditions Max. Units 16.6 40 MHz ICS7152-01, -11 16.6 67 MHz ICS7152-02, -12 40 134 MHz CKOUT, ICS7152-01, -11 16.6 67 MHz CKOUT, ICS7152-02, -12 40 134 MHz XIN, 16.6 to 100 MHz 40 50 60 % XIN, 100 to 134 MHz 45 50 55 % CKOUT, 1.5 V 40 60 % CKOUT, 0.4 to 2.4 V, CL = 15 pF 0.5 3.0 V/ns Input Crystal Frequency Input Clock Frequency Output Frequency Input Clock Duty Cycle Output Clock Duty Cycle fIN fOUT tDCI tDCC Output Slew Rate Cycle-to-Cycle Jitter tJC Power-up Time Modulation Frequency IDT® SPREAD SPECTRUM CLOCK GENERATOR fMOD Min. Typ. No load, spread off, ICS7152-01, -02 150 No load, spread off, ICS7152-11, -12 250 No load, spread off, ICS7152-01, 33.33 MHz, SEL = 0, FREQ = 1 120 ps PLL lock-time from power-up to 1% of final value 2 CKOUT 33 6 ICS7152 5 ms kHz REV K 062911 ICS7152 SPREAD SPECTRUM CLOCK GENERATOR SSCG Input Frequency (fIN = 1/tIN) tIN 0.8 VDD XIN Output Slew Rate 2.4 V 0.4 V CKOUT tr tf SR = (2.4 - 0.4) /tr, SR = (2.4 - 0.4) /tf Thermal Characteristics 8 SOIC Parameter Thermal Resistance Junction to Ambient Thermal Resistance Junction to Case IDT® SPREAD SPECTRUM CLOCK GENERATOR Symbol Conditions Min. Typ. Max. Units θJA Still air 150 ° C/W θJA 1 m/s air flow 140 ° C/W θJA 3 m/s air flow 120 ° C/W 40 ° C/W θJC 7 ICS7152 REV K 062911 ICS7152 SPREAD SPECTRUM CLOCK GENERATOR SSCG Package Outline and Package Dimensions (8-pin SOIC, 150 Mil. Body) Package dimensions are kept current with JEDEC Publication No. 95 8 Millimeters Symbol E A A1 B C D E e H h L α H INDEX AREA 1 2 D A Min Inches Max Min 1.35 1.75 0.10 0.25 0.33 0.51 0.19 0.25 4.80 5.00 3.80 4.00 1.27 BASIC 5.80 6.20 0.25 0.50 0.40 1.27 0° 8° Max .0532 .0688 .0040 .0098 .013 .020 .0075 .0098 .1890 .1968 .1497 .1574 0.050 BASIC .2284 .2440 .010 .020 .016 .050 0° 8° h x 45 A1 C -Ce B SEATING PLANE L .10 (.004) IDT® SPREAD SPECTRUM CLOCK GENERATOR C 8 ICS7152 REV K 062911 ICS7152 SPREAD SPECTRUM CLOCK GENERATOR SSCG Ordering Information Part / Order Number Marking Shipping Packaging Package Temperature 7152M-01LF 7152M-01LFT 7152MI-01LF 7152MI-01LFT 7152M-02LF 7152M-02LFT 7152MI-02LF 7152MI-02LFT 7152M-11LF 7152M-11LFT 7152MI-11LF 7152MI-11LFT 7152M-12LF 7152M-12LFT 7152MI-12LF 7152MI-12LFT 52M-01LF 52M-01LF 52MI01LF 52MI01LF 7152M02L 7152M02L 52MI02LF 52MI02LF 7152M11L 7152M11L 52MI11LF 52MI11LF 52M-12LF 52M-12LF 52MI12LF 52MI12LF Tubes Tape and Reel Tubes Tape and Reel Tubes Tape and Reel Tubes Tape and Reel Tubes Tape and Reel Tubes Tape and Reel Tubes Tape and Reel Tubes Tape and Reel 8-pin SOIC 8-pin SOIC 8-pin SOIC 8-pin SOIC 8-pin SOIC 8-pin SOIC 8-pin SOIC 8-pin SOIC 8-pin SOIC 8-pin SOIC 8-pin SOIC 8-pin SOIC 8-pin SOIC 8-pin SOIC 8-pin SOIC 8-pin SOIC 0 to +70° C 0 to +70° C -40 to +85° C -40 to +85° C 0 to +70° C 0 to +70° C -40 to +85° C -40 to +85° C 0 to +70° C 0 to +70° C -40 to +85° C -40 to +85° C 0 to +70° C 0 to +70° C -40 to +85° C -40 to +85° C "LF" suffix to the part number are the Pb-Free configuration and are RoHS compliant. While the information presented herein has been checked for both accuracy and reliability, Integrated Device Technology (IDT) assumes no responsibility for either its use or for the infringement of any patents or other rights of third parties, which would result from its use. No other circuits, patents, or licenses are implied. This product is intended for use in normal commercial applications. Any other applications such as those requiring extended temperature range, high reliability, or other extraordinary environmental requirements are not recommended without additional processing by IDT. IDT reserves the right to change any circuitry or specifications without notice. IDT does not authorize or warrant any IDT product for use in life support devices or critical medical instruments. IDT® SPREAD SPECTRUM CLOCK GENERATOR 9 ICS7152 REV K 062911 ICS7152 SPREAD SPECTRUM CLOCK GENERATOR SSCG Innovate with IDT and accelerate your future networks. Contact: www.IDT.com For Sales For Tech Support 800-345-7015 408-284-8200 Fax: 408-284-2775 www.idt.com/go/clockhelp Corporate Headquarters Integrated Device Technology, Inc. www.idt.com © 2011 Integrated Device Technology, Inc. All rights reserved. Product specifications subject to change without notice. IDT, ICS, and the IDT logo are trademarks of Integrated Device Technology, Inc. Accelerated Thinking is a service mark of Integrated Device Technology, Inc. All other brands, product names and marks are or may be trademarks or registered trademarks used to identify products or services of their respective owners. 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