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MAS1178
IC FOR 10.00 20.00 MHz VCXO
Low Power
Wide Supply Voltage Range
Square Wave Output
Very High Level of Integration
Electrically Trimmable
Very Low Phase Noise
Low Cost
DESCRIPTION
The MAS1178 is an integrated circuit well suited to
build VCXO for mobile communication. The
trimming is done by a serial bus and the calibration
information is stored in an internal PROM.
To build a VCXO only one additional component, a
crystal is needed.
FEATURES
APPLICATIONS
Very small size
Minor current draw
Wide operating temperature range
Phase noise <-130 dBc/Hz at 1 kHz offset
Square wave output
VCXO for mobile phones
VCXO for other telecommunications systems
BLOCK DIAGRAM
This is preliminary information on a
new product under development.
Micro Analog Systems Oy reserves
the right to make any changes
without notice.
DA
CLK
PV
VSS
VC
VDD
X1
OUT
X2
XO1
Digital
MAS1178
6
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PIN DESCRIPTION
Pin Description
Symbol
x-coordinate
y-coordinate
Power Supply Voltage
VDD
182
1317
Serial Bus Clock Input
CLK
645
1329
Serial Bus Data Input
DA
418
1329
Programming Input
PV
876
1311
Voltage Control Input
VC
215
213
Crystal Oscillator Output
X2
1053
209
Crystal/Varactor Oscillator Input
X1
434
209
Power Supply Ground
VSS
617
2267
Buffer Output
OUT
1218
1329
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.
ABSOLUTE MAXIMUM RATINGS
Parameter
Symbol
Min
Max
Unit
Note
Supply Voltage
V
DD
- V
SS
-0.3
6.0
V
Input Voltage
V
IN
V
SS
-0.3
V
DD
+ 0.3
V
1)
Power Dissipation
P
MAX
100
mW
Operating Temperature
T
OP
-35
85
o
C
Storage Temperature
T
ST
-40
120
o
C
Note 1: Not valid for programming pin PV
RECOMMENDED OPERATION CONDITIONS
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
Supply Voltage
V
DD
2.7
2.8
5.5
V
Supply Current
I
dd
Vdd = 2.8 Volt
2.3
mA
Operable Temperature
T
C
-30
+85
o
C
Storage Temperature
T
S
Relative humidity =
15%...70%
-5
+40
o
C
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ELECTRICAL CHARACTERISTICS
Parameter
Symbol
Min
Typ
Max
Unit
Note
Frequency Range
f
o
10.00
20.00
MHz
Voltage Control Range
V
C
0
Vdd
Voltage Control Sensitivity
V
CSENS
30
ppm/V
1)
Output Voltage (10 pF, Vdd 2.7V)
V
out
2.3
Vpp
Output Voltage (10 pF, Vdd 5.0V)
V
out
4.5
Vpp
Rise and Fall Time (10-50pF)
10
ns
Output Symmetry
40-60
%
Trimming CDAC (6 Bit)
C
X1
C20
C20 + 12
pF
2)
Startup Time
T
START
2
ms
Note 1: Vc sense is depending on the crystal used.
Note 2: Typ. C20 = 5 pF
IC OUTLINES
Note 1: MAS1178 pads are round with 80 m diameter at opening.
Note 2: Pins PV, CLK and DA must not be connected in VCXO module end-user application.
VDD
OUT
X2
VSS
X1
VC
DA
CLK
PV
MAS1178
1430 m
1
5
4
2
m
Die map reference
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SAMPLES IN SB20 DIL PACKAGE
M
A
S
1
1
7
8
Y
Y
W
W
X
X
X
X
X
.
X
2
1
20
3
4
5
6
7
8
9
10
19
18
17
16
15
14
13
12
11
X1
GND
X2
OUT
DA
PV
Top marking:
YYWW = Year, Week
XXXXX.X = Lot number
VDD
CLK
VC
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ORDERING INFORMATION
Product Code
Product
Package
Comments
MAS1178ATC1
IC FOR VCXO
EWS tested wafers 400 m
Die size 1430 x 1542 m
MAS1178ATF1
IC FOR VCXO
EWS tested wafers 254 m
Die size 1430 x 1542 m
MAS1178
IC FOR VCXO
SMD Package T.B.D.
Please contact Micro Analog Systems Oy for other wafer thickness options.
LOCAL DISTRIBUTOR
MICRO ANALOG SYSTEMS OY CONTACTS
Micro Analog Systems Oy
Kamreerintie 2, P.O. Box 51
FIN-02771 Espoo, FINLAND
http://www.mas-oy.com
Tel. (09) 80 521
Tel. Int. +358 9 80 521
Telefax +358 9 805 3213
Email: info@mas-oy.com
NOTICE
Micro Analog Systems Oy reserves the right to make changes to the products contained in this data sheet in order to improve the design or
performance and to supply the best possible products. Micro Analog Systems Oy assumes no responsibility for the use of any circuits
shown in this data sheet, conveys no license under any patent or other rights unless otherwise specified in this data sheet, and makes no
claim that the circuits are free from patent infringement. Applications for any devices shown in this data sheet are for illustration only and
Micro Analog Systems Oy makes no claim or warranty that such applications will be suitable for the use specified without further testing or
modification.
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