sm840051 Micrel Semiconductor, sm840051 Datasheet - Page 4

• Manufacturer Part Number: sm840051
• Description: Gigabit Ethernet Ultra-low Jitter Clock Synthesizer
• Manufacturer: Micrel Semiconductor

Micrel, Inc.
AC Electrical Characteristics
V
Test Circuit
3.3V Carrier Frequency, 156.25MHz
Crystal Characteristics
Note:
1. Devices are Green, RoHS-compliant and PFOS-compliant
May 2010
Symbol
F
t
t
ODC
Parameter
Mode of Oscillation
Frequency
Equivalent Series Resistance (ESR)
Shunt Capacitor
Drive Level
DD
JITTER
R
OUT
Offset from Carrier
/ t
= 2.5V and 3.3V ±5%; T
F
100kHz
10MHz
40MHz
100Hz
10kHz
1MHz
1kHz
Parameter
Output frequency
RMS phase jitter @ 156.25MHz
Output rise/fall time
Output Duty Cycle
Measured Phase Noise
A
= –40°C to +75°C, unless noted.
(1)
-122
-130
-127
-140
-165
-166
-85
Condition
Integration Range: 1.875M to 20MHz
20% to 80%
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
19.44
Unit
Min
Fundamental Parallel Resonant
4
Typ
Max
20.3
50
7
1
77.76
[e-mail]
Min
100
48
Units
MHz
mW
pF
Ω
Typ
58
50
or [phone]
162.4
M9999-050710-C
Max
350
52
SM840051
Units
MHz
ps
%
fs