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R1Q5A3609RBG-50RT0 Datasheet(PDF) 8 Page - Renesas Technology Corp |
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R1Q5A3609RBG-50RT0 Datasheet(HTML) 8 Page - Renesas Technology Corp |
8 / 26 page R1Q2A3636B/R1Q2A3618B/R1Q2A3609B REJ03C0341-0003 Rev.0.03 Apr. 11, 2008 Page 8 of 24 2b. Sequence controlled by Clock (/DOFF pin fixed high) when DLL enable Status Power Up Unstable Clock Stage Stop Clock Stage NOP & DLL Locking Stage Normal Operation VDD C, /C, K, /K 30ns min. 1024cycle min. VDDQ VREF /DOFF DLL Constraints 1. DLL uses either K or C clock as its synchronizing input, the input should have low phase jitter which is specified as TKC var. 2. The lower end of the frequency at which the DLL can operate is 119MHz. Programmable Output Impedance 1. Output buffer impedance can be programmed by terminating the ZQ ball to VSS through a precision resistor (RQ). The value of RQ is five times the output impedance desired. The allowable range of RQ to guarantee impedance matching with a tolerance of 10% is 250 Ω typical. The total external capacitance of ZQ ball must be less than 7.5 pF. |
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