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5V925BQI8 Datasheet(PDF) 8 Page - Integrated Device Technology |
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5V925BQI8 Datasheet(HTML) 8 Page - Integrated Device Technology |
8 / 18 page IDT5V925BQGI REVISION B JANUARY 21, 2011 8 ©2011 Integrated Device Technology, Inc. IDT5V925BI Data Sheet PROGRAMMABLE LVCMOS/LVTTL CLOCK GENERATOR Parameter Measurement Information, continued Output Duty Cycle/Pulse Width/Period Applications Information Recommendations for Unused Input and Output Pins Inputs: CLKIN Input For applications not requiring the use of a clock input, but using the crystal interface, the CLKIN input has to be connected to X2 (output of the crystal oscillator). See Figure 3. Crystal Inputs For applications not requiring the use of the crystal oscillator, X2 should be left floating and X1 and should be tied to ground. See Figure 2. LVCMOS Control Pins All control pins have internal pullups or pulldowns; additional resistance is not required but can be added for additional protection. A 1k Ω resistor can be used. Outputs: LVCMOS Outputs All unused LVCMOS output can be left floating. There should be no trace attached. t PERIOD t PW t PERIOD odc = V DD 2 V DD 2 x 100% t PW Q[2:0] |
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