AV9107C-13CS08 Datasheet | Integrated Circuit Systems

features which include on-chip loop filters, tristate outputs, and power-down capability. A minimum of external ponents - two decoupling capacitors and an optional ferrite bead - are all that are required for jitterfree operation. General Description • • • • • • • Features Patented on-chip Phase-Locked Loop with VCO for clock generation Provides two synthesized clocks Generates 20 and 40 MHz output frequencies. On-chip loop filter Low power CMOS technology Single +3.3 or +5 volt power supply 8-pin SOIC package Pin Configuration Block Diagram Note: Crystal is 20 MHz AV 9107-13 Rev B052197 AV9107C-13 Functionality OE 0 1 (at 14.318) MHz reference frequency input) CLK1 20 MHz 20 MHz CLK2 Tristate 40 MHz Pin Descriptions PIN NUMBER 1 2 3 4 5 6 7 8 PIN NAME OE GND X1/CLK0 X2 PD# CLK1 VDD CLK2 TYPE Input PWR Input Input PWR Output DESCRIPTION Output Enable - Tristates the 40 MHz output when low. Pull-Up Ground. Crystal Input or Input Clock frequency. Typically 20MHz crystal. Power Down. Shuts off chip when low outputs are driven low. Internall pull-up. Digital power supply (+5V DC). Clock2 output, divided by 2 from clock1 output, for 20MHz with 20MHz crystal. Output is synthesized. Output Crystal Output (No Connect when clock used.). Output Clock 1 output 40MHz with 20MHz crystal. Frequency Accuracy and Calculation The accuracy of the frequencies produced by the AV9107C depends on the input frequency and the desired actual output frequency. The formula for calculating the exact output frequency is as follows: Output Frequency = Input Frequency X Where A = 2, 3, 4 ... 128, and B = 2, 3, 4 ...32. For example, to calculate the actual output frequency for a video monitor expecting a 44.900 MHz clock and using a 14.318 MHz input clock, the closest A/B ratio is 69/22, which gives an output of 44.906 MHz (within 0.02% of the target frequency). Generally, the AV9107 can produce frequencies within 0.1% of the desired output. A B Allowable Input and Output...