SY89854UMG datasheet(6/13 Pages) MICREL

Part #	SY89854UMG

Description	Precision Low Power 1:4 LVPECL Fanout Buffer/Translator with Internal Termination

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Manufacturer	MICREL [Micrel Semiconductor]

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Micrel, Inc.

SY89854U

June 2005

M9999-060905

hbwhelp@micrel.com or (408) 955-1690

6

AC Electrical Characteristics

(8)

VCC = +2.5V ±5% or +3.3V ±10%; TA = –40°C to + 85°C, RL = 50Ω to VCC–2V, unless otherwise stated.

Symbol

Parameter

Condition

Min

Typ

Max

Units

fMAX

Maximum Operating Frequency

Clock, VOUT ≥ 400mV

2.0

3.5

GHz

NRZ Data

2.5

Gbps

tpd

Propagation Delay (IN-to-Q)

VIN ≥ 100mVpk

140

220

340

ps

tpd

Tempco

Differential Propagation Delay Temperature

Coefficient

100

fs/

oC

tSKEW

Output-to-Output Skew

Note 9

4

20

ps

Part-to-Part Skew

Note 10

150

ps

Note 11

1

ps(rms)

Random Jitter (RJ)

Deterministic Jitter (DJ)

Note 12

10

ps(pp)

tJitter

Cycle-to-Cycle Jitter

Total Jitter

Note 13

Note 14

1

10

ps(rms)

ps(pp)

tr, tf

Output Rise/Fall Time (20% to 80%)

At full output swing.

50

100

180

ps

Notes:

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

9. Output-to-output skew is measured between outputs under identical conditions.

10. 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. Part-to-part skew includes variation in tpd.

11. Random jitter is measured with a K28.7 character pattern, measured at 2.5Gbps.

12. DJ is measured at 2.5Gbps, with both K28.5 and 2

23 – 1 PRBS pattern.

13. Cycle-to-cycle jitter definition: The variation of periods between adjacent cycles, Tn – Tn-1 where T is the time between rising edges of the

output signal.

14. Total jitter definition: with an ideal clock input of frequency <fMAX, no more than one output edge in 10

12 output edges will deviate by more

than the specified peak-to-peak jitter value.

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