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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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CDCM1804RGET датащи(PDF) 12 Page - Texas Instruments |
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CDCM1804RGET датащи(HTML) 12 Page - Texas Instruments |
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12 / 24 page  www.ti.com PARAMETER MEASUREMENT INFORMATION IN IN Y0 Y0 tpd(LH1) Y1 Y1 tpd(LH2) tskLVCMOS(o) Y3 0.5 × VDD3 Y2 Y2 NOTES: A. Output skew, tsk(o), is calculated as the greater of: − The difference between the fastest and the slowest tpd(LH)n (n = 0…2) − The difference between the fastest and the slowest tpd(HL)n (n = 0…2) B. Part-to-part skew, tsk(pp), is calculated as the greater of: − The difference between the fastest and the slowest tpd(LH)n (n = 0…2 for LVPECL, n = 3 for LVCMOS) across multiple devices − The difference between the fastest and the slowest tpd(HL)n (n = 0…2 for LVPECL, n = 3 for LVCMOS) across multiple devices C. Pulse skew, tsk(p), is calculated as the magnitude of the absolute time difference between the high-to-low (tpd(HL) and the low-to-high (tpd(LH)) propagation delays when a single switching input causes one or more outputs to switch, tsk(p) = | tpd(HL) − tpd(LH) |. Pulse skew is sometimes referred to as pulse width distortion or duty cycle skew. T0067-01 |Yn*Yn| Yn Yn VOH VOL 80% 20% 0 V tr tf VOUT(pp) T0058-02 CDCM1804 SCAS697E – JULY 2003 – REVISED MAY 2005 Figure 8. Waveforms for Calculation of tsk(o) and tsk(pp) Figure 9. LVPECL Differential Output Voltage and Rise/Fall Time 12 |
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