SM843251-156KATR datasheet(4/7 Pages) MICREL

No de pièce	SM843251-156KATR

Description	ClockWorks??10-Gigabit Ethernet, 156.25MHz, Ultra-Low Jitter LVPECL Clock Frequency Synthesizer

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Fabricant	MICREL [Micrel Semiconductor]

Site Internet	http://www.micrel.com

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4 / 7 page

Micrel, Inc.

SM843251-156

October 2010

4

M9999-100110-A

hbwhelp@micrel.com

AC Electrical Characteristics

(5)

VDD = VDDA = 2.5V ±5% or 3.3V ±5%, TA = –40°C to +85°C, unless noted.

Symbol

Parameter

Condition

Min.

Typ.

Max.

Units

FOUT

Output Frequency

25MHz Crystal

156.25

MHz

tJITTER

RMS Phase Jitter (Output = 156.25 MHz)

Integration Range: 1.875MHz to 20MHz

110

fs

tR / tF

Output Rise/Fall Time

20% to 80%

80

175

350

ps

ODC

Output Duty Cycle

48

50

52

%

Note:

5.

The circuit is designed to meet the AC specifications shown in the above table(s) after thermal equilibrium has been established with a transverse

airflow greater than 500 lfpm.

Crystal Characteristics

Parameter

Condition

Min.

Typ.

Max.

Units

Mode of Oscillation

12pF Load

Fundamental, Parallel Resonant

Frequency

25

MHz

Equivalent Series Resistance (ESR)

50

Ω

Shunt Capacitor, C0

3

7

pF

Correlation Drive Level

100

300

uW

or (408) 955-1690

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SM843251-156KATR Fiches technique(PDF) 4 Page - Micrel Semiconductor

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