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ICS557G-05ALF Datasheet(PDF) 9 Page - Integrated Circuit Systems |
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ICS557G-05ALF Datasheet(HTML) 9 Page - Integrated Circuit Systems |
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9 / 12 page  Quad Differential PCI-Express Clock Source MDS 557-05A E 9 Revision 011606 Integrated Circuit Systems, Inc. ● 525 Race Street, San Jose, CA 95126 ● tel (408) 297-1201 ● www.icst.com ICS557-05A AC Electrical Characteristics - CLKOUTA/CLKOUTB Unless stated otherwise, VDD=3.3 V ±5%, Ambient Temperature -40 to +85 °C 1 Test setup is R L=50 ohms with 2 pF, Rr = 475Ω (1%). 2 Measurement taken from a single-ended waveform. 3 Measurement taken from a differential waveform. 4 Measured at the crossing point where instantaneous voltages of both CLKOUT and CLKOUT are equal. 5 CLKOUT pins are tri-stated when OE is low. asserted. CLKOUT is driven differential when OE is high unless its PD= low. Thermal Characteristics Parameter Symbol Conditions Min. Typ. Max. Units Input Frequency 25 MHz Output Frequency HCSL termination 200 MHz LVDS termination 100 MHz Output High Voltage1,2 VOH 660 700 850 mV Output Low Voltage1,2 VOL -150 0 mV Crossing Point Voltage1,2 Absolute 250 350 550 mV Crossing Point Voltage1,2,4 Variation over all edges 140 mV Jitter, Cycle-to-Cycle1,3 60 ps Modulation Frequency Spread spectrum 30 31.5 33 kHz Rise Time1,2 tOR From 0.175 V to 0.525 V 175 332 700 ps Fall Time1,2 tOF From 0.525 V to 0.175 V 175 344 700 ps Skew between outputs At crossing point Voltage 50 ps Duty Cycle1,3 45 55 % Output Enable Time5 All outputs 10 us Output Disable Time5 All outputs 10 us Power-up Time tSTABLE From power-up VDD=3.3 V 3.0 ms Spread Change Time tSPREAD Settling period after spread change 3.0 ms Parameter Symbol Conditions Min. Typ. Max. Units Thermal Resistance Junction to Ambient θ JA Still air 93 °C/W θ JA 1 m/s air flow 78 °C/W θ JA 3 m/s air flow 65 °C/W Thermal Resistance Junction to Case θ JC 20 °C/W |
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