MK3732-05
Low Phase Noise VCXO+Multiplier
MDS 3732-05 B
1
Revision 101001
Integrated Circuit Systems, Inc. 525 Race Street San Jose CA 95126 (408)295-9800 tel www.icst.com
Block Diagram
Description
Features
The MK3732-05 is a low cost, low jitter, high
performance VCXO and PLL clock synthesizer
designed to replace expensive discrete VCXOs
and multipliers. The on-chip Voltage Controlled
Crystal Oscillator (VCXO) accepts a 0 to 3.3 V
input voltage to cause the output clocks to vary by
100 ppm. Using ICS' patented VCXO and analog
Phase-Locked Loop (PLL) techniques, the
device uses an inexpensive 10 MHz to 18 MHz
pullable crystal input to produce one or two output
clocks.
ICS manufactures the largest variety of Set-Top
Box and multimedia clock synthesizers for all
applications. Consult ICS to eliminate VCXOs,
crystals and oscillators from your board.
For a 5 V version of this chip use the MK2732-05.
Packaged in 16 pin narrow SOIC
Replaces a VCXO and multiplier
Uses an inexpensive pullable crystal
Output clocks up to 108 MHz
On-chip patented VCXO with pull range of
200 ppm (100 ppm) minimum
VCXO tuning voltage of 0 to 3.3 V
Zero ppm synthesis error in both clocks
Advanced, low power, sub-micron CMOS process
3.3 V operating voltage
Industrial temperature version available
Voltage
Controlled
Crystal
Oscillator
PLL/Clock
Synthesis
Circuitry
CLK1
10-18 MHz
pullable
crystal
X1
X2
VIN
Output
Buffer
CLK2
Output
Buffer
OE
S2:S0
3
3
3
VDD
GND
MK3732-05
Low Phase Noise VCXO+Multiplier
MDS 3732-05 B
2
Revision 101001
Integrated Circuit Systems, Inc. 525 Race Street San Jose CA 95126 (408)295-9800 tel www.icst.com
Pin Descriptions
Key: I = Input with internal pull-up resistors; TI = tri-level input; O = output; P = power supply connection; VI = analog
voltage input; XI, XO = crystal pins.
Pin Assignment
Number
Name
Type
Description
1
X1
XI
Crystal connection. Connect to a pullable crystal of 10-18 MHz.
2, 3
VDD
P
Connect to +3.3V.
4
VIN
VI
Voltage Input to VCXO. Zero to 3.3 V signal which controls the frequency of the VCXO.
5, 6, 13
GND
P
Connect to ground.
7
S2
I
Select input pin 2. Selects outputs per table above.
8
OE
I
Output Enable. Tri-states outputs when low.
9
CLK1
O
Clock Output pin 1 per table above.
10
S0
TI
Select input pin 0. Selects outputs per table above.
11
VDD
P
Connect to +3.3V.
12
CLK2
O
Clock Output pin 2 per table above.
14
S1
I
Select input pin 1. Selects outputs per table above.
15
NC
-
Nothing is connected internally to this pin.
16
X2
XO
Crystal connection. Connect to a pullable crystal of 10-18 MHz.
External Components
The MK3732-05 requires a minimum number of external components for proper operation. Decoupling capacitors of
0.01F should be connected between VDD and GND on pins 3 and 5, and VDD and GND on pins 11 and 13, as
close to the MK3732-05 as possible. A series termination resistor of 33
may be used for each clock output. The
input crystal must be connected as close to the chip as possible. The input crystal should be a fundamental mode,
parallel resonant, pullable, AT cut. See page 4 for crystal specifications. Consult ICS for recommended suppliers.
IMPORTANT - consult the application note MAN05 for layout guidelines.
16
15
14
13
16 pin narrow (150 mil) SOIC
12
11
10
9
1
2
3
4
5
6
7
8
VDD
GND
X2
X1
VIN
OE
GND
S2
GND
CLK2
S0
CLK1
VDD
NC
S1
VDD
S2
S1
S0
CLK1
CLK2
0
0
0
REF/4
REF/2
0
0
M
OFF
x0.666
0
0
1
OFF
x2.6666
0
1
0
OFF
x4
0
1
M
OFF
x1.5
0
1
1
OFF
x1.3333
1
0
0
Test
Test
1
0
M
OFF
x4
1
0
1
OFF
x2
1
1
0
OFF
x3
1
1
M
OFF
x5
1
1
1
OFF
x6
0=connect directly to GND, 1=connect
directly to VDD, OFF=output stopped low.
Clock Select Table
MK3732-05
Low Phase Noise VCXO+Multiplier
MDS 3732-05 B
3
Revision 101001
Integrated Circuit Systems, Inc. 525 Race Street San Jose CA 95126 (408)295-9800 tel www.icst.com
Parameter
Conditions
Minimum
Typical
Maximum
Units
ABSOLUTE MAXIMUM RATINGS (note 1)
ABSOLUTE MAXIMUM RATINGS (note 1)
Supply voltage, VDD
Referenced to GND
7
V
Inputs and Clock Outputs
Referenced to GND
-0.5
VDD+0.5
V
Ambient Operating Temperature
-40
85
C
Soldering Temperature
Max of 10 seconds
260
C
Storage temperature
-65
150
C
DC CHARACTERISTICS (VDD = 3.3 V unless noted)
DC CHARACTERISTICS (VDD = 3.3 V unless noted)
Core Operating Voltage, VDD
3.15
3.3
3.45
V
Input High Voltage, VIH, X1 pin only
VDD/2 + 1
VDD/2
V
Input Low Voltage, VIL, X1 pin only
VDD/2
VDD/2 - 1
V
Input High Voltage, VIH, binary inputs
S2, S1, OE
2
V
Input Low Voltage, VIL, binary inputs
S2, S1, OE
0.8
V
Input High Voltage, VIH, trinary input
S0, pin 10
VDD -0.5
V
Input Low Voltage, VIL, trinary input
S0, pin 10
0.5
V
Output High Voltage, VOH
IOH=-12mA
2.4
V
Output Low Voltage, VOL
IOL=12mA
0.4
V
Output High Voltage, VOH, CMOS level
IOH=-8mA
VDD - 0.4
V
Operating Supply Current, IDD
No Load
12
mA
Short Circuit Current
Each output
50
mA
Input Capacitance
S2:S0, OE
7
pF
Frequency synthesis error
Both clocks
0
ppm
VIN, VCXO control voltage
0
3.3
V
AC CHARACTERISTICS (VDD = 3.3 V unless noted)
AC CHARACTERISTICS (VDD = 3.3 V unless noted)
Input Crystal Frequency
10
18
MHz
Output Clock Frequency
2.5
108
MHz
Output Clock Rise Time
0.8 to 2.0V
1.5
ns
Output Clock Fall Time
2.0 to 0.8V
1.5
ns
Output Clock Duty Cycle
At VDD/2
40
60
%
Maximum Absolute Jitter
200
ps
Phase Noise, relative to carrier
10 kHz offset
-115
dBc/Hz
Output pullability, note 2
0V
VIN
3.3V
100
ppm
Electrical Specifications
Notes:
1. Stresses beyond those listed under Absolute Maximum Ratings could cause permanent damage to the device.
Prolonged exposure to levels above the operating limits but below the Absolute Maximums may affect device reliability.
2. With an ICS approved pullable crystal.
See application note MAN05 for crystal information. MAN05 is available on the internet at
www.icst.com/pdf/man05.pdf
MK3732-05
Low Phase Noise VCXO+Multiplier
MDS 3732-05 B
4
Revision 101001
Integrated Circuit Systems, Inc. 525 Race Street San Jose CA 95126 (408)295-9800 tel www.icst.com
While the information presented herein has been checked for both accuracy and reliability, Integrated Circuit Systems, Incorporated (ICS) assumes no
responsibility for either its use or for the infringement of any patents or other rights of third parties, which would result from its use. No other circuits,
patents, or licenses are implied. This product is intended for use in normal commercial applications. Any other applications such as those requiring
extended temperature range, high reliability, or other extraordinary environmental requirements are not recommended without additional processing by
ICS. ICS reserves the right to change any circuitry or specifications without notice. ICS does not authorize or warrant any ICS product for use in life
support devices or critical medical instruments.
Ordering Information
Part/Order Number
Marking
Shipping packaging
Package
Temperature
MK3732-05S
MK3732-05S
tubes
16 pin SOIC
0-70 C
MK3732-05STR
MK3732-05S
tape and reel
16 pin SOIC
0-70 C
MK3732-05SI
MK3732-05SI
tubes
16 pin SOIC
-40-85C
MK3732-05SITR
MK3732-05SI
tape and reel
16 pin SOIC
-40-85C
B
D
E
H
e
A1
C
h x 45
A
L
Package Outline and Package Dimensions
(For current dimensional specifications, see JEDEC Publication No. 95.)
16 pin SOIC narrow
Inches
Inches
Millimeters
Millimeters
Symbol
Min
Max
Min
Max
A
0.0532
0.0688
1.35
1.75
A1
0.0040
0.0098
0.10
0.24
B
0.0130
0.0200
0.33
0.51
C
0.075
0.098
1.91
2.40
D
0.3859
0.3937
9.80
10.00
E
0.1497
0.1574
3.80
4.00
e .050 BSC
.050 BSC
1.27 BSC
1.27 BSC
H
0.2284
0.2440
5.80
6.20
h
0.0099
0.0195
0.25
0.50
L
0.0160
0.0500
0.41
1.27
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