MK3713
Low Cost 3.3 Volt VCXO
MDS 3713 B 1Revision 020900 Printed 11/16/00
Integrated Circuit Systems, Inc. • 525 Race Street • San Jose •CA •95126• (408)295-9800tel • www.icst.com
ICROCLOCK
PRELIMINARY INFORMATION
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 2Revision 020900 Printed 11/16/00
Integrated Circuit Systems, Inc. • 525 Race Street • San Jose •CA •95126• (408)295-9800tel • www.icst.com
ICROCLOCK
PRELIMINARY INFORMATION
Pin Descriptions
Pin Assignment
Number Name Description
1X1 Crystal connection. Connect to a pullable 10 to 20 MHz crystal.
2VDD VDD. Connect to + 3.3 V.
3VIN Voltage input to VCXO. Zero to 3.3 V analog input which controls the frequency of the VCXO.
4GND Connect to ground.
5 S0 Select pin for VCXO divider. See table above.
6VCXOCLK VCXO clock output. Full CMOS output amplitude.
7 S1 Select pin for VCXO divider. See table above.
8X2 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 Ω 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 3Revision 020900 Printed 11/16/00
Integrated Circuit Systems, Inc. • 525 Race Street • San Jose •CA •95126• (408)295-9800tel • www.icst.com
ICROCLOCK
PRELIMINARY INFORMATION
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 0.01µF 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 Ω 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 4Revision 020900 Printed 11/16/00
Integrated Circuit Systems, Inc. • 525 Race Street • San Jose •CA •95126• (408)295-9800tel • www.icst.com
ICROCLOCK
PRELIMINARY INFORMATION
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
B2/09/00 Preliminary Changed max output frequency to 10 MHZ
A12/29/99 Preliminary Original
CA
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
A0.0532 0.0688 1.35 1.75
A1 0.0040 0.0098 0.10 0.24
B 0.0130 0.0200 0.33 0.51
C0.0075 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
