ICS91730

LOW EMI, SPREAD MODULATING, CLOCK GENERATOR DATASHEET ICS91730 Features/Benefits ICS91730 is a Spread Spectrum Clock targeted for Mobile PC and LCD panel applications that generates an EMI-optimized clock signal (EMI peak reduction of 7-14 dB on 3rd-19th harmonics) through use of Spread Spectrum techniques. ICS91730 focuses on the lower input frequency range of 14.318 to 80.00 MHz with a spread modulation of 20kHz to 40kHz. Specifications Supply Voltages: VDD = 3.3V ±0.3V Frequency range: 14.318 MHz 80 MHz Cyc to Cyc jitter: <150ps Output duty cycle 45-55% 0°C to +85°C operation 8-pin SOIC Reference input Pin Configuration CLKIN 1 VDD 2 GND 3 CLKOUT 4 8 PD #* 7 SC LK 6 SD ATA 5 REF_OU T/FS_IN1* 8 Pin SOIC * Internal Pull-Up Resistor Functionality FSI N_1 0 1 MHz 14.318 MHz in --> 27MHz out 27.00MHz in --> 27.00MHz out Spread % default -0.8 down spread -1.25 down spread Block Diagram IDT® LOW EMI, SPREAD MODULATING, CLOCK GENERATOR 1 ICS91730 REV F 061611 ICS91730 LOW EMI, SPREAD MODULATING, CLOCK GENERATOR Pin Descriptions PIN # PIN NA ME PIN TYPE DESCRIPTION 1 CLKIN PWR Input for reference clock. 2 VDD IN Power supply, nominal 3.3V 3 GND OUT Ground pin. 4 CLKOUT I/O Modulated clock output. 5 REF_OUT/FS_IN1* I/O Un-modulated 3.3V reference clock output. Frequency select latch input. Refer to the functionality table. 6 SDATA PWR Data pin for SMBus circuitry, 5V tolerant. 7 SCLK PWR Clock pin of SMBus circuitry, 5V toler...