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ICS270 Datasheet(PDF) 6 Page - Integrated Circuit Systems |
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ICS270 Datasheet(HTML) 6 Page - Integrated Circuit Systems |
6 / 8 page Triple PLL Field Programmable VCXO Clock MDS 270 B 6 Revision 040705 Integrated Circuit Systems, Inc. ● 525 Race Street, San Jose, CA 95126 ● tel (408) 297-1201 ● www.icst.com ICS270 PRELIMINARY INFORMATION Note 1: Example with 25 MHz crystal input with eight outputs of 33.3 MHz, no load, and VDD = 3.3 V. AC Electrical Characteristics Unless stated otherwise, VDD = 3.3 V ±5%, Ambient Temperature -40 to +85 ° C Note 1: External crystal device must conform with Pullable Crystal Specifications listed on page 3. Note 2: Measured with 15 pF load. Note 3: Duty Cycle is configuration dependent. Most configurations are min 45% / max 55%. Thermal Characteristics Internal Pull-up Resistor RPUS S2:S0, PDTS 190 k Ω Internal Pull-down Resistor RPD CLK outputs 220 k Ω Input Capacitance CIN Inputs 4 pF Parameter Symbol Conditions Min. Typ. Max. Units Input Frequency FIN Fundamental crystal 5 27 MHz Output Frequency 0.314 200 MHz Crystal Pullability FP 0V< VIN < 3.3 V, Note 1 100 ppm VCXO Gain VIN = VDD/2 + 1 V, Note 1 110 ppm/V Output Rise/Fall Time tOF 80% to 20%, high drive, Note 2 1.0 ns Output Rise/Fall Time tOF 80% to 20%, low drive, Note 2 2.0 ns Duty Cycle Note 3 40 49-51 60 % Power-up time PLL lock-time from power-up 410 ms PDTS goes high until stable CLK output 0.6 2 ms One Sigma Clock Period Jitter Configuration Dependent 50 ps Maximum Absolute Jitter tja Deviation from Mean, Configuration Dependent +200 ps Pin-to-Pin Skew Low Skew Outputs -250 250 ps 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 Parameter Symbol Conditions Min. Typ. Max. Units |
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