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CDCP1803 Fiches technique(PDF) 11 Page - Texas Instruments |
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CDCP1803 Fiches technique(HTML) 11 Page - Texas Instruments |
11 / 25 page |Yn*Yn| Yn Yn VOH VOL 80% 20% 0 V tr tf VOUT(pp) T0058-02 IN IN Y0 Y0 tpd(LH1) Y1 Y1 tpd(LH2) Y2 Y2 NOTES: A. Output skew , t , is calculated as the greater of: sk(o) − The difference between the fastest and the slowest t (n = 0…2) pd(LH)n − The difference between the fastest and the slowest t (n = 0…2) pd(HL)n B. Part-to-part skew , t , is calculated as the greater of: sk(pp) − The difference between the fastest and the slowest t ( (n = 0…2 for LVPECL across multiple devices pd(LH)n − The difference between the fastest and the slowest t ( (n = 0…2 for LVPECL across multiple devices pd(HL)n C. Pulseskew , t , is calculated as the magnitude of the absolute time difference between the high-to-low (t and the low-to-high sk(p) pd(HL) (t pd(LH pd(HL) pd(LH ) propagation delays when a single switching input causes one or more outputs to switch, t = | t − t |. Pulse skew sk(p) ) is sometimes referred to as pulse width distortion or duty cycle skew. T0067-02 CDCP1803 www.ti.com SCAS727F – NOVEMBER 2003 – REVISED DECEMBER 2013 PARAMETER MEASUREMENT INFORMATION Figure 6. Waveforms for Calculation of tsk(o) and tsk(pp) Figure 7. LVPECL Differential Output Voltage and Rise/Fall Time PCB DESIGN FOR THERMAL FUNCTIONALITY It is recommended to take special care of the PCB design for good thermal flow from the QFN 24-terminal package to the PCB. Due to the three LVPECL outputs, the current consumption of the CDCP1803 is fixed. JEDEC JESD51-7 specifies thermal conductivity for standard PCB boards. Copyright © 2003–2013, Texas Instruments Incorporated Submit Documentation Feedback 11 Product Folder Links :CDCP1803 |
Numéro de pièce similaire - CDCP1803_13 |
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Description similaire - CDCP1803_13 |
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