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GS4915-INE3 Datasheet(PDF) 6 Page - Gennum Corporation |
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GS4915-INE3 Datasheet(HTML) 6 Page - Gennum Corporation |
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6 / 26 page  GS4915 Data Sheet 39145 - 3 November 2007 6 of 26 18 DOUBLE Non synchronous Input CONTROL SIGNAL INPUT Signal levels are LVCMOS compatible. Controls the output frequency of the cleaned clock, for HD input clocks. See Section 3.5 for operation. 19 SKEW_EN Non synchronous Input CONTROL SIGNAL INPUT Signal levels are LVCMOS compatible. Selects the phase of the output clock with respect to the selected input clock. See Section 3.6 for operation. 21 LOCK Non synchronous Output STATUS SIGNAL OUTPUT Signal levels are LVCMOS compatible. This pin will be HIGH when the output clock is locked to the selected input clock. It will be LOW otherwise. 23 SE_VDD – Power Positive power supply connection for the single-ended clock driver. Determines the output level of CLKOUT_SE. Connect to filtered +1.8V DC or +3.3V DC. NOTE: If the single-ended clock output is not used, this pin should be tied to ground. 24 CLKOUT_SE – Output CLOCK SIGNAL OUTPUT Signal levels are LVCMOS compatible. Single-ended video clock output signal. See Section 3.7.2 for operation. 25 D_VDD – Power Positive power supply connection for the single-ended output clock buffer. Connect to filtered +1.8V DC. NOTE: If the single-ended clock output is not used, this pin should be tied to ground. 27 DIFF_OUT_VDD – Power Positive power supply connection for the LVDS clock outputs. Connect to filtered +1.8V DC. NOTE: If the LVDS clock outputs are not used, this pin should be tied to ground. 29, 28 CLKOUT, CLKOUT – Output CLOCK SIGNAL OUTPUT Differential video clock output signal. This is the lowest jitter output of the device. See Section 3.7.1 for operation. 32 DIV_VDD – Power Positive power supply connection for the divider block. Connect to filtered +1.8V DC. 33,34 VCO, VCO Analog Input Differential input for the external VCO reference signal. When using the recommended VCO, leave VCO unconnected. See Section 3.3.4 for operation. 35 VCO_GND – Power Ground reference for the external voltage controlled oscillator. Connect to pins 2, 4, 6, and 8 of the GO1555. Table 1-1: Pin Descriptions (Continued) Pin Number Name Timing Type Description |
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