DA9281.002
10 July 2006
MAS9281
This is advance information on a new
product under development. Micro Analog
Systems Oy reserves the right to make any
changes without notice.
IC FOR 10.00 – 60.00 MHz XO
•
•
•
•
Low Cost
Divider Option up to f
o
/512
Wide Supply Voltage Range
CMOS Output
•
Very High Level of Integration
•
Very Low Phase Noise
•
Output Three-State Function
DESCRIPTION
MAS9281 is an integrated circuit well suited to
make fundamental crystal oscillator (XO): only one
additional component, a crystal is needed.
MAS9281 includes oscillator and output buffer
circuits.
FEATURES
•
•
•
Very small size
Minimum current draw
Stand-by functions: Output high impedance, but
oscillator running. Output high impedance and
oscillator stop
Wide operating temperature range
Phase noise <-130 dBc/Hz at 1 kHz offset
CMOS output
APPLICATIONS
•
•
•
XO for data terminals
XO for telecommunication applications
XO for computer application
•
•
•
BLOCK DIAGRAM
PD
1/2
1/2
1/2
1/2
VDD
OUT
MAS9281
X2
X'Tal
X1
VSS
1 (6)
DA9281.002
10 July 2006
ABSOLUTE MAXIMUM RATINGS
Parameter
Supply Voltage
Input Voltage
Power Dissipation
Operating Temperature
Storage Temperature
Symbol
V
DD
- V
SS
V
IN
P
MAX
T
OP
T
ST
Min
-0.3
V
SS
-0.3
-40
-55
Max
6.0
V
DD
+ 0.3
120
85
150
Unit
V
V
mW
o
C
o
C
Note
RECOMMENDED OPERATION CONDITIONS
Parameter
Supply Voltage
Crystal Load Capacitance
MAS9281AN, -AP, -AQ, -AR, -AS, -AT,
MAS9281A0, -A1, -A2, -A3, -A4
MAS9281AG -AH, -AJ, -AK, -AL
MAS9281AA, -AB, -AC, -AD, -AE
Symbol
V
DD
C
L
Conditions
Min
2.4
Typ
2.8
14.5
14.5
11
9
Max
5.5
Unit
V
Note
1)
2)
Note 1:
If V
DD
= 5V, it is recommended to connect 1nF capacitor to Vdd pin.
Note 2:
For other load capacitance options contact to Micro Analog Systems Oy.
ELECTRICAL CHARACTERISTICS FOR 3V SUPPLY VOLTAGE
T
A
= -40° to +85° typical values at T
A
= +27°C, V
DD
= 2.7V… 3.3V, f
O
= 30 MHz, Output Load = 15 pF, unless otherwise specified.
C
C,
Parameter
Output Load
Crystal Frequency Range
when Output Load is Maximum 30pF
Crystal Frequency Range
when Output Load is Maximum 50pF
Supply Current
MAS9281 (f
o
)
MAS9281 (f
o
/2)
MAS9281 (f
o
/4)
MAS9281 (f
o
/8)
MAS9281 (f
o
/16)
MAS9281 (f
o
/512)
Output Voltage Range
Rise and Fall Time
Start-up Time
Output Symmetry
Symbol
Min
Typ
15
Max
50
60.00
40.00
Unit
pF
MHz
MHz
mA
Note
f
o
f
o
I
DD
10.00
10.00
Note 1
See fig. 2
5.7
4.5
4.1
3.9
3.7
3.5
Vdd ± 0.5
3
T
START
45
2
48-52
55
4
Vpp
ns
ms
%
Tri State Output Buffer
PD
V
OFF State
0
0.55
ON State
1.6
V
DD
Power Down High Level Output
2.7
V
V
OH
Voltage: Ioh=5.2 mA ,Vdd = 3V
(Test measurement, see fig. 1, p. 5)
PD Pull-up Resistance
Rup1
900k
ohm
(Design value)
Note1:
MAS9281AN – MAS9281AT and MAS9281A0 – MAS9281A4 maximum frequency is 44MHz.
2 (6)
DA9281.002
10 July 2006
ELECTRICAL CHARACTERISTICS FOR 5V SUPPLY VOLTAGE
T
A
= -40° to +85° typical values at T
A
= +27°C, V
DD
= 4.5V… 5V, f
O
= 30 MHz, Output Load = 15 pF, unless otherwise specified.
C
C,
Parameter
Output Load
Crystal Frequency Range
when Output Load is Maximum 30pF
Crystal Frequency Range
when Output Load is Maximum 50pF
Supply Current
MAS9281 (f
o
)
MAS9281 (f
o
/2)
MAS9281 (f
o
/4)
MAS9281 (f
o
/8)
MAS9281 (f
o
/16)
MAS9281 (f
o
/512)
Output Voltage Range
Rise and Fall Time
Start-up Time
Output Symmetry
Tri State Output Buffer
OFF State
ON State
Power Down High Level Output
Voltage: Ioh=16 mA ,Vdd = 5V
(Test measurement, see fig. 1, p. 5)
PD Pull-up resistance
Design value
Symbol
Min
Typ
15
Max
50
60.00
40.00
Unit
pF
MHz
MHz
mA
Note
f
o
f
o
I
DD
10.00
10.00
Note 1
See fig. 2
11.3
8.0
7.7
7.6
7.3
7.1
Vdd ± 0.5
3
T
START
45
PD
0
1.6
0.55
V
DD
4.7
2
48-52
55
4
Vpp
ns
ms
%
V
V
OH
Rup1
V
900k
ohm
Note1:
MAS9281AN – MAS9281AT and MAS9281A0 – MAS9281A4 maximum frequency is 44MHz
PIN DESCRIPTION
Pin Description
Power Down
Crystal Oscillator Output
Crystal Oscillator Input
Power Supply Ground
Power Supply Voltage
Buffer Output
Symbol
PD
X2
X1
VSS
VDD
OUT
x-coordinate
146
312
553
695
178
597
y-coordinate
140
140
140
140
826
826
Note:
Because the substrate of the die is internally connected to GND, the die has to be connected to GND or
left floating. Please make sure that GND is the first pad to be bonded. Pick-and-place and all component
assembly are recommended to be performed in ESD protected area.
Note:
Pad coordinates are measured from the left bottom corner of the chip to the center of the pads. The
coordinates may vary depending on sawing width and location, however, distances between pads are accurate.
3 (6)
DA9281.002
10 July 2006
IC OUTLINES
VDD
OUT
MAS9281A1
988um
PD
Die map reference
X2
X1
VSS
850um
Note:
Die map reference is the actual left bottom corner of the sawn chip.
SERIES CONFIGURATION
Product Code
MAS9281AA
MAS9281AB
MAS9281AC
MAS9281AD
MAS9281AE
MAS9281AG
MAS9281AH
MAS9281AJ
MAS9281AK
MAS9281AL
MAS9281AN
MAS9281AP
MAS9281AQ
MAS9281AR
MAS9281AS
MAS9281AT
MAS9281A0
MAS9281A1
MAS9281A2
MAS9281A3
MAS9281A4
Output
Frequency
f
o
f
o
/2
f
o
/4
f
o
/8
f
o
/16
f
o
f
o
/2
f
o
/4
f
o
/8
f
o
/16
f
o
f
o
/2
f
o
/4
f
o
/8
f
o
/16
f
o
/512
f
o
f
o
/2
f
o
/4
f
o
/8
f
o
/16
Crystal
Load (pF)
9
9
9
9
9
11
11
11
11
11
14.5
14.5
14.5
14.5
14.5
14.5
14.5
14.5
14.5
14.5
14.5
Output Load
(pF)
15
15
15
15
15
15
15
15
15
15
15
15
15
15
15
15
15
15
15
15
15
Output
Duty Level
CMOS
CMOS
CMOS
CMOS
CMOS
CMOS
CMOS
CMOS
CMOS
CMOS
CMOS
CMOS
CMOS
CMOS
CMOS
CMOS
CMOS
CMOS
CMOS
CMOS
CMOS
Power Down
Function
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Frequency
Range (MHz)
10 - 60
10 - 60
10 - 60
10 - 60
10 - 60
10 - 60
10 - 60
10 - 60
10 - 60
10 - 60
10 – 44
10 – 44
10 – 44
10 – 44
10 - 44
10 - 44
10 – 44
10 – 44
10 – 44
10 – 44
10 – 44
4 (6)
DA9281.002
10 July 2006
APPLICATION INFORMATION
Version
AA, AB, AC, AD, AE,
AG, AH, AJ, AK, AL, AN,
AP, AQ, AR, AS, AT
A0, A1, A2, A3, A4
PD pin
HIGH
LOW
Floating
HIGH
LOW
Floating
Output
Normal Operation
High Impedance
Normal Operation
Normal Operation
High Impedance
Normal Operation
Oscillator
Normal Operation
Stopped
Normal Operation
Normal Operation
Normal Operation
Normal Operation
Figure 1
Signal
Generator
1nF X1
50R
MAS9281
Output
250R
Vdd
Vss
Figure 2
Signal
Generator
1nF X1
50R
MAS9281
Output
Vdd
A
Vss
5 (6)
stm32/stm8
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