SM843031-01 Datasheet, PDF (4/7 Pages) Micrel Semiconductor – ClockWorks™ 10-Gigabit Ethernet, 312.5MHz, Ultra-Low Jitter LVPECL Clock Frequency Synthesizer

Micrel, Inc.
SM843031-01
AC Electrical Characteristics⁽⁵⁾
V_DD = V_DDA = 2.5V ±5% or 3.3V ±5%, T_A = –40°C to +85°C, unless noted.
Symbol
Parameter
Condition
Min. Typ. Max. Units
F_OUT
Output Frequency
312.5
MHz
t_JITTER
RMS Phase Jitter (Output = 312.5 MHz) Integration Range: 1.875MHz to 20MHz
119
fs
t_R, t_F
Output Rise/Fall Time
20% to 80%
80
175
350
ps
O_DC
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
Mode of Oscillation
Frequency
Equivalent Series Resistance (ESR)
Shunt Capacitor, C0
Correlation Drive Level
Condition
12pF Load
Min.
Typ.
Max.
Fundamental, Parallel Resonant
25
50
3
7
100
300
Units
MHz
Ω
pF
uW
October 2010
4
M9999-100110-A
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