ICS91720

ICS91720 Low EMI, Spread Modulating, Clock Generator Features: Pin Configuration ICS91720 is a Spread Spectrum Clock targeted for Mobile PC and LCD panel applications that CLKIN 1 8 PD#* generates an EMI-optimized clock signal (EMI peak VDD 2 7 SCLK reduction of 7-14 dB on 3rd-19th harmonics) through GND 3 use of Spread Spectrum techniques. **CLKOUT/FS_IN0 4 ICS91720 focuses on the lower input frequency 6 SDATA 5 REF_OUT/FS_IN1* range of 14.318 to 80.00 MHz with a spread modulation of 20kHz to 40kHz. 8 Pin SOIC/TSSOP * Internal Pull-Up Resistor Specifications: ** Internal Pull-Down Resistor Supply Voltages: VDD = 3.3V ±0.3V Frequency range: 14.318 MHz ≤ Fin ≥ 80 MHz Cyc to Cyc jitter: <150ps Output duty cycle 45-55% Guarantees +85°C operational condition. 8-pin SOIC/TSSOP Reference input Functionality FSIN_1 FSIN_0 MHz 0 0 14.318 MHz in --> 27MHz out 0 1 14.318MHz -->14.318MHz out 1 0 27.00MHz in --> 27.00MHz out 1 1 48.00MHz in -->48.00 MHz out Spread % default -0.8 down spread -1.00 down spread -1.25 down spread -0.8 down spread Block Diagram CLKIN PLL1 Spread Spectrum REFOUT CLKOUT PD# SDATA SCLK FS_IN0:1 Control Logic Config. Reg. 0698D—10/05/04 ICS91720 Pin Description PIN # PIN NAME PIN DESCRIPTION TYPE 1 CLKIN PWR Input for reference clock. 2 VDD IN Power supply, nominal 3.3V 3 GND OUT Ground pin. 4 **CLKOUT/FS_IN0 I/O Modulated clock output. Frequency select latch input. Refer to the functionalit...