CDC329

1-LINE TO 6-LINE CLOCK DRIVER

WITH SELECTABLE POLARITY

SCBS117A–D4501, JANUARY 1991–REVISED NOVEMBER 1992

5

POST OFFICE BOX 655303

tPLH1

2Y2

2Y1

2T/C

1Y2

1Y1

1T/C

A

tPHL1

tPLH5

tPHL5

tPLH2

tPHL2

tPLH6

tPHL6

tPLH3

tPHL3

tPHL7

tPLH7

tPLH4

tPHL4

tPHL8

tPLH8

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:

a) the difference between the fastest and slowest of tPLH from A↑ to any Y

(e.g., tPLHn, n = 1 to 4; or tPLHn, n = 5 to 6),

b) the difference between the fastest and slowest of tPHL from A↓ to any Y

(e.g., tPHLn, n = 1 to 4; or tPHLn, n = 5 to 6),

c) the difference between the fastest and slowest of tPLH from A↓ to any Y

(e.g., tPLHn, n = 7 to 8), and

d) the difference between the fastest and slowest of tPHL from A↑ to any Y

(e.g., tPHLn, n = 7 to 8).

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:

a) the difference between the fastest and slowest of tPLH from A↑ to any Y or tPHL from A↑ to any Y

(e.g., tPLHn, n = 1 to 4; or tPLHn, n = 5 to 6, and tPHLn, n = 7 to 8), and

b) the difference between the fastest and slowest of tPHL from A↓ to any Y or tPLH from A↓ to any Y

(e.g., tPHLn, n = 1 to 4; or tPHLn, n = 5 to 6, and tPLHn, n = 7 to 8).

Figure 2. Skew Waveforms and Calculations