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CY28344PVC Datasheet(PDF) 16 Page - SpectraLinear Inc |
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CY28344PVC Datasheet(HTML) 16 Page - SpectraLinear Inc |
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16 / 21 page  CY28344 Rev 1.0, November 21, 2006 Page 16 of 21 - Switching Characteristics[3] Over the Operating Range, PCI,3V66 Clock Outputs.(Lump CapacitanceTest Load = 20 pF) Parameter Output Description Test Conditions Min. Max. Unit t1 All Output Duty Cycle[4] Measured at 1.5V 45 55 % t3 USB, REF, DOT Falling Edge Rate Between 2.4V and 0.4V 0.5 2.0 ps t3 PCI,3V66 Falling Edge Rate Between 2.4V and 0.4V 1.0 4.0 V/ns t5 3V66[0:1] 3V66-3V66 Skew Measured at 1.5V 500 ps t5 66BUFF[0:2] 66BUFF-66BUFF Skew Measured at 1.5V 175 ps t6 PCI PCI-PCI Skew Measured at 1.5V 500 ps t7 3V66,PCI 3V66-PCI Clock Jitter 3V66 leads. Measured at 1.5V 1.5 3.5 ns t9 3V66 Cycle-Cycle Clock Jitter Measured at 1.5V t9 = t9A – t9B 250 ps t9 USB, DOT Cycle-Cycle Clock Jitter Measured at 1.5V t9 = t9A – t9B 350 ps t9 PCI Cycle-Cycle Clock Jitter Measured at 1.5V t9 = t9A – t9B 500 ps t9 REF Cycle-Cycle Clock Jitter Measured at 1.5V t9 = t9A – t9B 1000 ps CPU 1.0V Switching Characteristics t2 CPU RiseTime Measured differential waveform from –0.35V to +0.35V 175 467 ps t3 CPU Fall Time Measured differential waveform from –0.35V to +0.35V 175 467 ps t4 CPU CPU-CPU Skew Measured at Crossover 150 ps t8 CPU Cycle-Cycle Clock Jitter Measured at Crossover t8 = t8A – t8B 150 ps CPU Rise/Fall Matching Measured with test loads[5] 325 mV Voh CPU High-level Output Voltage including overshoot Measured with test loads[5] 0.92 1.45 V Vol CPU Low-level Output Voltage including undershoot Measured with test loads[5] -0.2 0.35 V Vcrossover CPU Crossover Voltage Measured with test loads[5] 0.51 0.76 V CPU 0.7V Switching Characteristics t2 CPU RiseTime Measured single ended waveform from 0.175V to 0.525V 175 700 ps t3 CPU Fall Time Measured single ended waveform from 0.175V to 0.525V 175 700 ps t4 CPU CPU-CPU Skew Measured at Crossover 150 ps t8 CPU Cycle-Cycle Clock Jitter Measured at Crossover t8 = t8A – t8B With all outputs running 150 ps CPU Rise/Fall Matching Measured with test loads[3,4] 20 % Voh CPU High-level Output Voltage including overshoot Measured with test loads[4] 0.85 V Vol CPU Low-level Output Voltage including undershoot Measured with test loads[4] -0.15 V Vcrossover CPU Crossover Voltage Measured with test loads[4] 0.28 0.43 V Notes: 3. All parameters specified with loaded outputs. 4. Duty cycle is measured at 1.5V when VDD = 3.3V. When VDD = 2.5V, duty cycle is measured at 1.25V. 5. Determined as a fraction of 2*(Trp – Trn)/(Trp +Trn) Where Trp is a rising edge and Trp is an intersecting falling edge. 6. The 0.7V test load is Rs = 33.2 ohm, Rp = 49.9 ohm in test circuit. 7. The 1.0V test load is shown on test circuit page. |
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