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CDC391_09 Datasheet, PDF (6/7 Pages) Texas Instruments – 1Line to 6Line Clock Driver | |||
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CDC391
1ÄLINE TO 6ÄLINE CLOCK DRIVER
WITH SELECTABLE POLARITY AND 3ÄSTATE OUTPUTS
SCAS334A â DECEMBER 1992 â REVISED NOVEMBER 1995
PARAMETER MEASUREMENT INFORMATION
A
1T/C
1Y1
tPLH1
1Y2
tPLH2
2T/C
tPHL1
tPHL2
tPLH5
tPLH6
tPHL5
tPHL6
2Y1
tPLH3
2Y2
tPLH4
tPHL3
tPHL4
tPHL7
tPHL8
tPLH7
tPLH8
NOTES: A. Output skew, tsk(o), from A to any Y (same phase), can be measured only between outputs for which the respective polarity-control
inputs (T/C) are at the same logic level. It is calculated as the greater of:
â The difference between the fastest and slowest of tPLH from Aâ to any Y (e.g., tPLHn, n = 1 to 4; or tPLHn, n = 5 to 6)
â The difference between the fastest and slowest of tPHL from Aâ to any Y (e.g., tPHLn, n = 1 to 4; or tPHLn, n = 5 to 6)
â The difference between the fastest and slowest of tPLH from Aâ to any Y (e.g., tPLHn, n = 7 to 8)
â The difference between the fastest and slowest of tPHL from Aâ to any Y (e.g., tPHLn, n = 7 to 8)
B. Output skew, tsk(o), from A to any Y (any phase), can be measured between outputs for which the respective polarity-control inputs
(T/C) are at the same or different logic levels. It is calculated as the greater of:
â The difference between the fastest and slowest of tPLH from Aâ to any Y or tPHL from Aâ to any Y (e.g., tPLHn, n = 1 to 4;
or tPLHn, n = 5 to 6, and tPHLn, n = 7 to 8)
â The difference between the fastest and slowest of tPHL from Aâ to any Y or tPLH from Aâ to any Y (e.g., tPHLn, n = 1 to 4;
or tPHLn, n = 5 to 6, and tPLHn, n = 7 to 8)
Figure 2. Waveforms for Calculation of tsk(o)
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