Micrel, Inc.

SY89221U

January 2007

8

M9999-012407-B

AC Electrical Characteristics

(8)

Symbol

Parameter

Condition

Min

Typ

Max

Units

Maximum Operating Frequency

1.5

2.0

GHz

IN-to-Q

800

1250

1600

ps

CLK_SEL-to-Q

700

1000

1400

ps

Differential Propagation Delay

/MR(H-L)-to-Q

700

1000

1400

ps

Reset Recovery Time

/MR (L-H)-to-IN

300

ps

Tempco

Differential Propagation Delay

Temperature Coefficient

225

fs/°C

Within-Bank Skew

Within same fanout bank

(9, 10)

10

35

ps

Bank-to-Bank Skew

Same divide setting

(11)

15

40

ps

Bank-to-Bank Skew

Different divide setting

(11)

25

60

ps

Part-to-Part Skew

Note 12

400

ps

Random Jitter (RJ)

Note 13

1

Total Jitter (TJ)

Note 14

10

Cycle-to-Cycle Jitter

Note 15

1

Output Rise/Fall Time

(20% to 80%)

At full output swing

120

180

270

ps

Divide-by-2 or Divide-by-4

47

53

Divide-by-1, input > 1GHz

45

55

%

Duty Cycle

Divide-by-1, input < 1GHz

47

53

Notes:

8.

Measured with 100mV input swing. See “Timing Diagrams” section for definition of parameters. High-frequency AC-parameters are guaranteed

by design and characterization.

9.

Within-bank skew is the difference in propagation delays among the outputs within the same bank.

10. Skews within banks depend on the number of outputs. Within-bank skew decreases if the bank has lesser outputs.

11. Bank-to-bank skew is the difference in propagation delays between outputs from different banks. Bank-to-bank skew is also the phase offset

between each bank, after MR is applied.

12. Part-to-part skew is defined for two parts with identical power supply voltages at the same temperature and with no skew of the edges at the

respective inputs.

13. Random jitter is measured with a K28.7 comma detect character pattern.

14. Total jitter definition: with an ideal clock input frequency

≤ f

specified peak-to-peak jitter value.

signal.