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ICS557GI-05A Datasheet(PDF) 9 Page - Integrated Device Technology |
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ICS557GI-05A Datasheet(HTML) 9 Page - Integrated Device Technology |
9 / 12 page ICS557-05A QUAD DIFFERENTIAL PCI-EXPRESS CLOCK SOURCE PCIE SSCG IDT™ / ICS™ QUAD DIFFERENTIAL PCI-EXPRESS CLOCK SOURCE 9 ICS557-05A REV H 092407 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 asserted low. CLKOUT is driven differential when OE is high unless its PD= low. Thermal Characteristics Parameter Symbo l 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 27 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 80 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 θJA Still air 93 ° C/W θJA 1 m/s air flow 78 ° C/W θJA 3 m/s air flow 65 ° C/W Thermal Resistance Junction to Case θJC 20 ° C/W |
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