ICS840031I ICST | Alldatasheet

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www.icst.com/products/hiperclocks.html REV. A FEBRUARY 24, 2005 Integrated Circuit Systems, Inc. ICS840031I FEMTOCLOCKS™ CRYSTAL-TO- LVCMOS/LVTTL CLOCK GENERATOR GENERAL DESCRIPTION The ICS840031I is an IEEE 1394b Clock Generator and a member of the HiPerClocksTM family of high performance devices from ICS. The ICS840031I uses a 24.576MHz crystal to synthesize 98.304MHz. The ICS840031I has excellent phase jitter performance, from 12KHz – 20MHz integration range. The ICS840031I is packaged in a small 8-pin SOIC, making it ideal for use in systems with limited board space.

FEATURES

  • (1) LVCMOS/LVTTL output
  • Crystal oscillator interface designed for a 24.576MHz, 18pF parallel resonant crystal
  • Output frequency: 98.304MHz (typical)
  • VCO range: 490MHz to 640MHz
  • RMS phase jitter @ 98.304MHz, using a 24.576MHz crystal (12KHz - 20MHz): 0.75ps (typical)
  • RMS phase noise at 98.304MHz (typical) Offset Noise Power
  • 3.3V core/1.8V output operating supply
  • Lead-Free fully RoHS compliant
  • -40°C to 85°C ambient operating temperature HiPerClockS™ ICS ICS840031I 8-Lead SOIC 3.90mm x 4.90mm x 1.37mm package body M Package Top View VDD XTAL_OUT XTAL_IN VDDA VDDO GND PLL_SEL BLOCK DIAGRAM PIN ASSIGNMENT OSC Phase Detector VCO 589.824MHz w/ 24.576MHz Ref. M = ÷24 (fixed) XTAL_IN XTAL_OUT PLL_SEL FREQUENCY TABLE s t u p n I y c n e u q e r F t u p t u O z H M z H M y c n e u q e r F l a t s y r C (Pullup)

TABLE 2. PIN CHARACTERISTICS TABLE 1. PIN DESCRIPTIONS

TABLE 4. CRYSTAL CHARACTERISTICS conditions for extended periods may affect product reliability. TABLE 5. AC CHARACTERISTICS, VDD = VDDA = 3.3V±5%, VDDO = 1.8V±5%, TA = -40°C TO 85°C

www.icst.com/products/hiperclocks.html REV. A FEBRUARY 24, 2005 Integrated Circuit Systems, Inc. ICS840031I FEMTOCLOCKS™ CRYSTAL-TO- LVCMOS/LVTTL CLOCK GENERATOR TYPICAL PHASE NOISE AT 98.304MHZ -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 -110 -120 -130 -140 -150 -160 -170 -180 -190 100 10k 100k 10M 100M 98.304MHz RMS Phase Jitter (Random) 12KHz to 20MHz = 0.75ps (typical) OFFSET FREQUENCY (HZ) NOISE POWER dBc Hz Phase Noise Result by adding a Filter to raw data Raw Phase Noise Data Filter

www.icst.com/products/hiperclocks.html REV. A FEBRUARY 24, 2005 Integrated Circuit Systems, Inc. ICS840031I FEMTOCLOCKS™ CRYSTAL-TO- LVCMOS/LVTTL CLOCK GENERATOR PARAMETER MEASUREMENT INFORMATION OUTPUT DUTY CYCLE/PULSE WIDTH/PERIOD OUTPUT RISE/FALL TIME 3.3V/1.8V OUTPUT LOAD AC TEST CIRCUIT SCOPE Qx LVCMOS 2.4±0.9V -0.9V±5% Pulse Width tPERIOD tPW tPERIOD odc = VDD GND VDD, VDDA RMS PHASE JITTER Phase Noise Mask Offset Frequency Phase Noise Plot RMS Jitter = Area Under the Masked Phase Noise Plot Noise Power Clock Outputs 20% 80% 80% 20% tR tF VDDO 0.9V±5%

TABLE 7. PACKAGE DIMENSIONS

TABLE 8. ORDERING INFORMATION for use in life support devices or critical medical instruments. The aforementioned trademarks, HiPerClockS™ and FemtoClocks™ are a trademark of Integrated Circuit Systems, Inc. or its subsidiaries in the United States and/or other countries.