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ICS9FG107YFLNT Datasheet(PDF) 3 Page - Integrated Circuit Systems |
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ICS9FG107YFLNT Datasheet(HTML) 3 Page - Integrated Circuit Systems |
3 / 14 page 3 Integrated Circuit Systems, Inc. ICS9FG107 0863C—11/22/04 Pin Description (Continued) PIN # PIN NAME PIN TYPE DESCRIPTION 25 DIF_STOP# IN Active low input to stop differential output clocks. 26 *SPREAD IN Asynchronous, active high input, with internal 120Kohm pull-up resistor, to enable spread spectrum functionality. 27 **SEL14M_25M# IN Select 14.31818 MHz or 25 Mhz input frequency. 1 = 14.31818 MHz, 0 = 25 MHz 28 *OE_3 IN Active high input for enabling outputs. 0 = tri-state outputs, 1= enable outputs 29 DIF_3# OUT 0.7V differential complement clock outputs 30 DIF_3 OUT 0.7V differential true clock outputs 31 VDD PWR Power supply, nominal 3.3V 32 DIF_2# OUT 0.7V differential complement clock outputs 33 DIF_2 OUT 0.7V differential true clock outputs 34 **OE_2 IN Active high input for enabling outputs. 0 = tri-state outputs, 1= enable outputs 35 GND PWR Ground pin. 36 VDD PWR Power supply, nominal 3.3V 37 **OE_1 IN Active high input for enabling outputs. 0 = tri-state outputs, 1= enable outputs 38 DIF_1# OUT 0.7V differential complement clock outputs 39 DIF_1 OUT 0.7V differential true clock outputs 40 VDD PWR Power supply, nominal 3.3V 41 DIF_0# OUT 0.7V differential complement clock outputs 42 DIF_0 OUT 0.7V differential true clock outputs 43 *OE_0 IN Active high input for enabling outputs. 0 = tri-state outputs, 1= enable outputs 44 **FS1 I/O Frequency select latch input pin / 3.3V 66.66MHz clock output. 45 *DWNSPRD# IN 3.3V input that selects spread mode. This input is not latched at power up. 0 = Down Spread, 1 = Center Spread 46 IREF OUT This pin establishes the reference current for the differential current- mode output pairs. This pin requires a fixed precision resistor tied to ground in order to establish the appropriate current. 475 ohms is the standard value. 47 GNDA PWR Ground pin for the PLL core. 48 VDDA PWR 3.3V power for the PLL core. Pins preceeded by * have 120 Kohm pull DOWN resistors Pins preceeded by ** have 120 Kohm pull UP resistors |
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