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4

Switching Characteristics

over recommended operating free air temperature range

Note 3: Propagation delay time from up/down to ripple carry must be measured with the counter at either a minimum or a maximum count. As the logic level

of the up/down input is changed, the ripple carry output will follow. If the count is minimum (0), the ripple carry output transition will be in phase. If the count is

maximum, the ripple carry output will be out of phase.

Symbol

Parameter

Conditions

From

To

Min

Max

Units

Maximum Clock Frequency

75

MHz

Propagation Delay Time

Clock

RIPPLE Carry

3

16.5

ns

LOW-to-HIGH Level Output

Propagation Delay Time

Clock

RIPPLE Carry

2

13

ns

HIGH-to-LOW Level Output

Propagation Delay Time

Clock

Any Q

1

7

ns

LOW-to-HIGH Level Output

Propagation Delay Time

Clock

Any Q

2

13

ns

HIGH-to-LOW Level Output

Propagation Delay Time

En T

RIPPLE Carry

1.5

9

ns

LOW-to-HIGH Level Output

Propagation Delay Time

En T

RIPPLE Carry

1.5

9

ns

HIGH-to-LOW Level Output

Propagation Delay Time

U/D

RIPPLE Carry

2

12

ns

LOW-to-HIGH Level Output

(Note 3)

Propagation Delay Time

U/D

RIPPLE Carry

2

13

ns

HIGH-to-LOW Level Output

(Note 3)