CMOS Harmonic Oscillator -CHO
TM
Spread Spectrum Clock Generator
MM8511
Integrating Time
™
MM8511:
PRELIMINARY
CMOS / 3.3V / 5x3.2mm
Ordering Information:
et
MM8511
ice
40 V3 C S56 C D1 + T
e
t
-
o
2 3 4 5 6 7 8 9
sh t n
1
a
1)
Microsystems Part Number
at
Features:
ou
Mobiusfrequency
(programmable)
• All-CMOS Temperature Compensated Oscillator
y D with
2) Output Voltage
(V3: 3.3V)
r
3) Supply
• No quartz or other mechanical resonators or PLL used
na
i
4) Output Signal Type
(C: CMOS)
ge
• Spread Spectrum output to reduce EMI
m
n
i
5) Package Type
(S56: SMD 5x3.2mm 6pin)
el
• Factory programmable down- and center- spread options
ha
6) Temperature Range
(C: 0 to 70 C)
Pr
to 6%)
o c
• Factory programmable spread magnitude (0.25
7) Spread Spectrum Settings
(Please see Table.1 below)
tt
• Factory programmable output frequency (10 to 100MHz)
8) Environmental Compliancy
(+: Green, Pb-Free)
jec
• Best-in-class Phase Noise and Jitter performance
9) Tape & Reel
(T: Tape& Reel shipment)
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Electrical Specifications:
S
Powered by Mobius Microsystems’ patented CMOS Harmonic Oscillator (CHO)
technology, the MM8511 replaces quartz crystal based oscillators with a monolithic
CMOS IC and offers programmable output frequencies and Spread Spectrum
Clocking functionality without the use of any mechanical frequency source or PLL.
o
VDD=3.0V to 3.6V, T
A
=0 to 70
o
C unless otherwise noted. Typical values are measured at VDD=3.3V, T
A
=35
o
C
Parameter
Supply Voltage
Temperature
Input LOW level
Input HIGH level
Supply Current
Quiescent Current
Output LOW level
Output HIGH level
Output Frequency
Frequency Stability
Rise Time
Fall Time
Duty Cycle
Power-up time
Period Jitter
Cycle-cycle Jitter
Phase Noise
Symbol
VDD
T
A
V
IL
V
IH
IDD
IDDQ
V
OL
V
OH
F
OUT
F
TOT
RT
FT
DC
t
on
PJ
RMS
CJ
RMS
PN
Conditions
Ambient temperature in normal operation
Min
3.0
0
70% x VDD
Typ
3.3
Max
3.6
70
30% x VDD
Units
V
o
C
V
V
mA
µA
V
V
MHz
ppm
Active supply current, no output load
CE=LOW, output disabled
I
OL
= -8mA
I
OH
= 8mA
Factory Programmable.Contact Mobius for frequencies beyond the limit
Total Frequency Stability over temperature,supply variation,aging (1st
year at 35oC),shock&vibration. Spread Spectrum turned OFF.
20% to 80% x VDD. Output load (C
L
) =8pF
80% to 20% x VDD. Output load (C
L
) =8pF
Clock output duty cycle. Measured at VDD/2, C
L
=8pF
Output valid time after VDD meets the specified range
Total RMS Period Jitter (including random and deterministic)
1MHz offset from carrier, F=40MHz, 50Ω termination
1
23
0.2
VDD-0.6
10
+200
27.5
1
0.45
100
2.0
2.0
45
1
3
6
-140
55
ns
ns
%
ms
ps
RMS
ps
RMS
dBc/Hz
Std dev of the max change in the periods of any 2 adjacent cycles
1
Note 1. Measured at 40MHz frequency with a 50Ω termination to GND
Table.1 Spread Spectrum order codes and settings
(Contact factory for more selections)
C1 Center Spread, +0.25% C4
C2
C3 Center Spread, +0.75% C6
Center Spread, +1%
Center Spread, +2%
C7 Center Spread, +3% D3 Down Spread, -1.5% D6
Down Spread, -2%
Down Spread, -3%
D7
D2
Down Spread, -1%
D5
Down Spread, -4%
Down Spread, -6%
Center Spread, +0.5% C5 Center Spread, +1.5% D1 Down Spread, -0.5% D4
Package Drawing:
Recommended Land Pattern:
d
Pin Assignments:
1
CE
Chip Enable.Device active when CE
is HIGH
Spread Spectrum Disable.SSC
active when SSOFF is LOW
Ground
Clock output
No Connect
Power Supply. Connect a 0.1µF cap
between VDD and GND pins
2
SSOFF
3
4
5
6
GND
OUT
NC
VDD
Copyright © 2007 Mobius Microsystems, Inc., 111 W. Evelyn, Suite 210, Sunnyvale, CA94086
• March 2009 •
www.mobiusmicro.com
Page 1
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