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XRK49911IJ-5 Datasheet(PDF) 9 Page - Exar Corporation |
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XRK49911IJ-5 Datasheet(HTML) 9 Page - Exar Corporation |
9 / 12 page xr XRK49911 REV. 1.0.1 3.3V HIGH-SPEED (110 MHZ) PROGRAMMABLE SKEW CLOCK BUFFER 9 NOTES: 9. Test measurement levels for the XRK49911 are TTL levels (1.5V to 1.5V). Test conditions assume signal transition times of 2 ns or less and output loading as shown in the AC Test Loads and Waveforms unless otherwise specified. 10. SKEW is defined as the time between the earliest and the latest output transition among all outputs for which the same tU delay has been selected when all are loaded with 30pF and terminated with 50Ω to VCC/2. SWITCHING CHARACTERISTICS OVER THE 3.3V + 10% OPERATING RANGE [2,9] SYMBOL DESCRIPTION XRK49911-2 XRK49911-5 XRK49911-7 UNIT MIN TYP MAX MIN TYP MAX MIN TYP MAX tRPWH CLKIN Pulse Width HIGH 4 4 4 ns tRPWL CLKIN Pulse Width LOW 4 4 4 ns tu Programmable Skew Unit See Table 1 tSKEWPR Zero Output Matched-Pair Skew (Qx[1:0]) [10, 11] 0.05 0.2 0.1 0.25 0.1 0.25 ns tSKEW0 Zero Output Skew (All Outputs) [10, 12] 0.1 0.25 0.25 0.5 0.3 0.75 ns tSKEW1 Output Skew (Rise-Rise, Fall-Fall, Same Class Outputs) [10, 13] 0.25 0.5 0.6 0.7 0.6 1 ns tSKEW2 Output Skew (Rise-Fall, Nominal- Inverted, Divided-Divided) [10, 13] 0.3 1 0.5 1 1 1.5 ns tSKEW3 Output Skew (Rise-Rise, Fall-Fall, Different Class Outputs) [10, 13] 0.25 0.5 0.5 0.7 0.7 1.2 ns tSKEW4 Output Skew (Rise-Fall, Nominal- Divided, Divided-Inverted [10, 13] 0.5 0.9 0.5 1 1.2 1.7 ns tDEV Device-to-Device Skew [14, 15] 0.75 1.25 1.65 ns tPD Propagation Delay, CLKIN Rise to FB_IN Rise -0.25 0 0.25 -0.5 0 0.5 -0.7 0 0.7 ns tODCV Output Duty Cycle Variation [16] -0.65 0 0.65 -1 0 1 -1.2 0 1.2 ns tPWH Output HIGH Time Deviation from 50% [17] 2.0 2.5 3 ns tPWL Output LOW Time Deviation from 50% [17] 1.5 3 3.5 ns tORISE Output Rise Time [17, 18] 0.15 1 1.2 0.15 1 1.5 0.15 1.5 2.5 ns tOFALL Output Fall Time [17, 18] 0.15 1 1.2 0.15 1 1.5 0.15 1.5 2.5 ns tLOCK PLL Lock Time [19] 0.5 0.5 0.5 ms tJR Cycle-to-Cycle Output Jitter RMS [14] 25 25 25 ps Peak-to-Peak [14] 200 200 200 |
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