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SY58021U

4GHz, 1:4 LVPECL Fanout Buffer/Translator with Internal Termination Precision Edge®

Micrel 

Micrel, Inc.

SY58021U

LVPECL Output DC Electrical Characteristics(5)

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

Symbol Parameter

Condition

Min.

Typ.

VOH

VOL

VOUT

VDIFF_OUT

Output HIGH Voltage

Output LOW Voltage

Output Voltage Differential Swing

Differential Output Voltage Swing

(see Figure 1a)

(see Figure 1b)

VCC − 1.145

VCC − 1.945

550

1100

780

1560

Max.

VCC − 0.895

VCC − 1.695

1050

2100

Units

V

V

mV

mV

AC Electrical Characteristics

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

Symbol Parameter

Condition

Min.

Typ.

Max.

Units

fMAX

Maximum Operating Frequency

VOUT ≥ 400mV

Clock

4

NRZ Data

5

GHz

Gbps

tPD

Propagation Delay

150

220

300

ps

tCHAN

Channel-to-Channel Skew

Note 7

4

15

ps

tSKEW

Part-to-Part Skew

Note 8

50

ps

tJITTER

RMS Phase Jitter

Output: 622MHz

Integration Range:

12kHz − 20MHz

70

fs

tr, tf

Output Rise/Fall Time (20% to 80%) At full swing

35

75

110

ps

Notes:

7. Skew is measured between outputs of the same bank under identical transitions.

8. 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.

September 2011

5

M9999-090111-B

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

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