Micrel, Inc.

SY89540U

December 2007

M9999-120607-C

8

AC Electrical Characteristics

(7)

Symbol

Parameter

Condition

Min

Typ

Max

Units

Maximum Operating Frequency

NRZ Data

3.2

4

Gbps

Propagation Delay

4

GHz

IN-to-Q

280

380

480

Ω

CONFIG-to-Q

350

800

Tempco

160

fs/°C

Set-up Time

SIN-to-LOAD

SOUT-to-LOAD

LOAD-to-CONFIG

CONFIG-to-LOAD

800

800

800

950

ps

Hold Time

LOAD-to-SIN, LOAD-to-SOUT

800

ps

Minimum LOAD and CONFIG

Pulse Width

800

ps

Output-to-Output Skew

Part-to-Part Skew

Note 8

Note 9

30

150

ps

ps

Data

Random Jitter (RJ)

Deterministic Jitter (DJ)

Note 10

Note 11

1

10

Clock

Cycle-to-Cycle Jitter

Total Jitter (TJ)

Note 12

Note 13

1

Crosstalk-Induced Jitter

Note 14

0.7

Rise/Fall Times

At full output swing (20% to 80%)

40

80

120

ps

Notes:

7.

High frequency AC-parameters are guaranteed by design and characterization.

8.

Output to output skew is measured between two different outputs under identical transitions. Input voltage swing is

≥100mV.

9.

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.

10. RJ is measured with a K28.7 comma detect character pattern, measured at 2.5Gbps/3.2Gbps.

11. DJ is measured at 2.5Gbps/3.2Gpbs, with both K28.5 and 2

rising edges of the output signal.

by more than the specified peak-to-peak jitter value.

14. Crosstalk induced jitter is defined as the added jitter that results from signals applied to two adjacent channels. It is

measured at the output while applying two similar, differential clock frequencies that are asynchronous with respect to

each other at the inputs.