DATASHEET SPREAD SPECTRUM CLOCK GENERATOR ICS7152 Description Features The ICS7152-01, -02, -11, and -12 are clock generators for Operating voltage of 3.3 V 0.3 V EMI (Electro Magnetic Interference) reduction (see below Packaged in 8-pin SOIC for frequency ranges and multiplier ratios). Spectral peaks Input frequency range of 16.6 to 134.0 MHz can be attenuated by slightly modulating the oscillation frequency. Both down and center spread profiles are Output frequency range of 16.6 to 134.0 MHz selectable. Center spread maintains an average frequency Provides a spread spectrum clock output (0.5%, 1.5% equal to an unspread clock. Down spread meets maximum center spread -1.0%, -3.0% down spread) frequency specs over the entire modualtion cycle. Advanced, low-power CMOS process Industrial temperature range available Pb (lead) free package, RoHS compliant Block Diagram VDD SEL PLL Clock FREQ Synthesis and Spread CKOUT XENS Spectrum Circuitry XIN Clock Buffer/ Crystal Ocsillator XOUT External caps required with crystal for GND accurate tuning of the clock Product Lineup Product Input Frequency Range Modulation Type Modulation Enable Pin ICS7152M-01, ICS7152MI-01 16.6 MHz to 67 MHz Down spread ICS7152M-02, ICS7152MI-02 40.0 MHz to 134.0 MHz Yes ICS7152M-11, ICS7152MI-11 16.6 MHz to 67.0 MHz Center spread ICS7152M-12, ICS7152MI-12 40.0 MHz to 134.0 MHz IDT SPREAD SPECTRUM CLOCK GENERATOR 1 ICS7152 REV K 062911ICS7152 SPREAD SPECTRUM CLOCK GENERATOR SSCG Pin Assignment SEL Modulation Rate Setting Table SEL Spread Spread Part Number XIN 1 8 XENS Pin 4 Direction Percentage (%) (note1) XOUT 2 7 FREQ 0 Center 0.5 ICS7152M-11, GND 3 6 VDD ICS7152M-12 SEL 4 5 CKOUT Down -1.0 ICS7152M-01, ICS7152M-02 8 pin (150 mil) SOIC 1 Center 1.5 ICS7152M-11, ICS7152M-12 Down -3.0 ICS7152M-01, ICS7152M-02 Modulation Enable Setting Table Frequency Setting Table XENS Spread Spectrum Pin 8 FREQ Frequency Pin 7 0ON 0 16.6 to 40 MHz ICS7152M-01, 1OFF ICS7152M-11 40 to 80 MHz ICS7152M-02, ICS7152M-12 1 33 to 67 MHz ICS7152M-01, ICS7152M-11 66 to 134 MHz ICS7152M-02, ICS7152M-12 Pin Descriptions Pin Pin Pin Type Pin Description Number Name 1 XIN Input Crystal resonator connection pin/clock input pin. 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 2 ICS7152 REV K 062911