CDC328A

1LINE TO 6LINE CLOCK DRIVER

WITH SELECTABLE POLARITY

SCAS327B − DECEMBER 1992 − REVISED NOVEMBER 1995

6

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

POST OFFICE BOX 1443

• HOUSTON, TEXAS 77251−1443

PARAMETER MEASUREMENT INFORMATION

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

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:

− 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)

− 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)

− The difference between the fastest and slowest of tPLH from A↓ to any Y (e.g., tPLHn, n = 7 to 8)

− The difference between the fastest and slowest of tPHL from A↑ 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:

− 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)

− 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)

C. Pulse skew, tsk(p), is calculated as the greater of tPLHn - tPHLn(n = 1, 2, 3, 4, 5, 6 ,7, 8).

Figure 2. Waveforms for Calculation of tsk(o), tsk(p)