MK3713
Low Cost 3.3 Volt VCXO
MDS 3713 B
1
Revision 020900
Integrated Circuit Systems, Inc. 525 Race Street San Jose CA 95126 (408)295-9800tel www.icst.com
P R E L I M I N A R Y I N F O R M A T I O N
Block Diagram
Description
Features
The MK3713 is ICS/MicroClock's lowest cost,
low jitter, high performance 3.3 Volt VCXO
designed to replace expensive VCXO modules.
The on-chip Voltage Controlled Crystal Oscillator
accepts a 0 to 3.3 V input voltage to cause the
output clocks to vary by 100 ppm. Using
ICS/MicroClock's patented VCXO and analog
Phase-Locked Loop (PLL) techniques, the device
uses an inexpensive external pullable crystal input
to produce the output clock.
ICS/MicroClock manufactures the largest variety
of communications, set-top box, and multimedia
clock synthesizers for all applications. If more
clock outputs are needed, see the MK3732 or
MK377x family of parts. Consult
ICS/MicroClock to eliminate VCXOs, crystals
and oscillators from your board.
Packaged in 8 pin SOIC
Ideal for T1 and E1 VCXOs
Output range of 1.25 MHz to 10 MHz
For a 10-20 MHz output range, use the MK3711
For higher than 20 MHz, use the MK3732-05
3.3 V only operating voltage
Uses an inexpensive 10 - 20 MHz external crystal
On-chip VCXO (patented) with pull range of
200ppm (minimum)
VCXO tuning voltage of 0 to 3.3 V
12mA output drive capability at TTL levels
Advanced, low power, sub-micron CMOS process
Voltage
Controlled
Crystal
Oscillator
10 -20 MHz
pullable
crystal
X1
X2
VIN
Output
Buffer
VCXOCLK
N
S1, S0
MK3713
Low Cost 3.3 Volt VCXO
MDS 3713 B
2
Revision 020900
Integrated Circuit Systems, Inc. 525 Race Street San Jose CA 95126 (408)295-9800tel www.icst.com
P R E L I M I N A R Y I N F O R M A T I O N
Pin Descriptions
Pin Assignment
Number
Name
Description
1
X1
Crystal connection. Connect to a pullable 10 to 20 MHz crystal.
2
VDD
VDD. Connect to + 3.3 V.
3
VIN
Voltage input to VCXO. Zero to 3.3 V analog input which controls the frequency of the VCXO.
4
GND
Connect to ground.
5
S0
Select pin for VCXO divider. See table above.
6
VCXOCLK VCXO clock output. Full CMOS output amplitude.
7
S1
Select pin for VCXO divider. See table above.
8
X2
Crystal connection. Connect to a pullable 10 to 20 MHz crystal.
8 pin (150 mil) SOIC
MK3713
1
8
2
3
4
7
6
5
X2
X1
GND
VDD
S0
VIN
S1
VCXOCLK
S1
S0
VCXOCLK (MHz)
0
0
Crystal 2
0
1
Crystal 4
1
0
Crystal 6
1
1
Crystal 8
Divider Select Table
Application Tip
For 1.544 MHz (T1), use 12.352 MHz crystal 8
For 2.048 MHz (E1), use 12.288 MHz crystal 6
Pullable Crystal Specifications:
Correlation (load) Capacitance
14 pF
C0/C1
240 max
ESR
35
max
Operating Temperature
0 to 70 C
Initial Accuracy
20 ppm
Temperature plus Aging Stability
50 ppm
MK3713
Low Cost 3.3 Volt VCXO
MDS 3713 B
3
Revision 020900
Integrated Circuit Systems, Inc. 525 Race Street San Jose CA 95126 (408)295-9800tel www.icst.com
P R E L I M I N A R Y I N F O R M A T I O N
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
0
70
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)
Operating Voltage, VDD
3.15
3.30
3.45
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=-4mA
VDD-0.4
V
Input High Voltage, VIH
2
V
Input Low Voltage, VIL
0.8
V
Operating Supply Current, IDD
No Load
7
mA
Short Circuit Current
50
mA
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
20
MHz
Input Crystal Accuracy
30
ppm
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
50
60
%
Output Clock Pullability, note 2
0V
VIN
3.3 V
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 a ICS/MicroClock approved pullable crystal.
External Components
The MK3713 requires a minimum number of external components for proper operation. A decoupling
capacitor of 0.01F should be connected between VDD and GND on pins 2 and 4, as close to the
MK3713 as possible. A series termination resistor of 33
may be used for the clock output. The input
crystal must be connected as close to the chip as possible. The input crystal should be a parallel mode,
pullable, AT cut, 13.5 MHz, with 14 pF load capacitance. Consult ICS for recommended suppliers.
IMPORTANT - read application note MAN05 before laying out the PCB.
MK3713
Low Cost 3.3 Volt VCXO
MDS 3713 B
4
Revision 020900
Integrated Circuit Systems, Inc. 525 Race Street San Jose CA 95126 (408)295-9800tel www.icst.com
P R E L I M I N A R Y I N F O R M A T I O N
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
MK3713S
MK3713S
tubes
8 pin SOIC
0-70 C
MK3713STR
MK3713S
tape and reel
8 pin SOIC
0-70 C
CHANGE HISTORY
Version Date first published
Status
Comments
B
2/09/00
Preliminary
Changed max output frequency to 10 MHZ
A
12/29/99
Preliminary
Original
C
A
B
D
E
H
e
A1
Pin 1
L
Package Outline and Package Dimensions
(
For current dimensional specifications, see JEDEC Publication No. 95.)
8 pin SOIC
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
0.0075
0.0098
0.19
0.24
D
0.1890
0.1968
4.80
5.00
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
PDF 
ZIP