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What is ICS3726-12?

This electronic component, produced by the manufacturer "ICST", performs the same function as "HIGH PERFORMANCE VCXO".


ICS3726-12 Datasheet PDF - ICST

Part Number ICS3726-12
Description HIGH PERFORMANCE VCXO
Manufacturers ICST 
Logo ICST Logo 


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PRELIMINARY INFORMATION
ICS3726-12
HIGH PERFORMANCE VCXO
Description
The ICS3726-12 is a low cost, low-jitter,
high-performance 3.3 volt VCXO designed to replace
expensive discrete VCXOs modules. The ICS3726-12
offers a wider operating frequency range and improved
power supply noise rejection. The on-chip Voltage
Controlled Crystal Oscillator accepts a 0 to 3.3 V input
voltage. Using ICS’ patented VCXO techniques, the
device uses an inexpensive external pullable crystal in
the range of 20 to 52 MHz to produce a VCXO output
clock at that same frequency.
This part is ideal for Set-Top Box, multimedia clock
synthesizers and ADSL/VDSL applications.
The frequency of the on-chip VCXO is adjusted by an
external control voltage input into pin VIN. Because
VIN is a high-impedance input, it can be driven directly
from an PWM RC integrator circuit. Frequency output
increases with VIN voltage input. The usable range of
VIN is 0 to VDD.
Features
Packaged in 8-pin SOIC
Operational frequency range of 20 MHz to 52 MHz
Uses an inexpensive external crystal
On-chip patented VCXO with pull range of 400 ppm
VCXO tuning voltage of 0 to VDD
Operating voltage of 3.3 V
12 mA output drive capability at TTL levels
Works with surface mount crystal with CL=10 pF
Advanced, low-power, sub-micron CMOS process
Available in Pb (lead) free package
Block Diagram
VIN
X1
20 to 52 MHz
Pullable Crystal
X2
Optional tuning
crystal capacitors
VDD
Voltage
Controlled
Crystal
Oscillator
GND
20 to 52 MHz
Clock (REFOUT)
MDS 3726-12 B
1
Revision 120505
Integrated Circuit Systems 525 Race Street, San Jose, CA 95126 tel (408) 297-1201 www.icst.com

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ICS3726-12 equivalent
PRELIMINARY INFORMATION
ICS3726-12
HIGH PERFORMANCE VCXO
DC Electrical Characteristics
VDD=3.3 V ±5% , Ambient temperature 0 to +70°C, unless stated otherwise
Parameter
Symbol Conditions
Min. Typ.
Operating Voltage
VDD
3.15
Output High Voltage
Output Low Voltage
Output High Voltage (CMOS
Level)
VOH
VOL
VOH
IOH = -12 mA
IOL = 12 mA
IOH = -4 mA
2.4
VDD-0.4
Operating Supply Current
IDD No load
6
Short Circuit Current
VIN, VCXO Control Voltage
IOS
VIA
±50
0
Max.
3.45
0.4
Units
V
V
V
V
mA
mA
3.3 V
AC Electrical Characteristics
VDD = 3.3 V ±5%, Ambient Temperature 0 to +70° C, unless stated otherwise
Parameter
Symbol
Conditions
Min. Typ. Max. Units
Output Frequency
Crystal Pullability
VCXO Gain
FO 20 52 MHz
FP 0V< VIN < 3.3 V, Note 1
+ 200
ppm
VIN = VDD/2 + 1 V, Note 1
150 ppm/V
Output Rise Time
Output Fall Time
Output Clock Duty Cycle
Period Jitter RMS
Period Jitter P- P
Integrated Jitter RMS
tOR 0.8 to 2.0 V, CL=15 pF
1.5 ns
tOF 2.0 to 0.8 V, CL=15 pF
1.5 ns
tD Measured at 1.4 V, CL=15 pF 40 50 60 %
tJ CL=15 pF @35.328 MHz
6.7 ps
tJ CL=15 [email protected] MHz
46 ps
Integrated 12 kHz to 20 MHz
1
ps
@ 35.328 MHz
Phase Noise relative to
Carrier
@35.328 MHz Carrier
frequency
@10 Hz
-65 dBc/Hz
@100 Hz
-90 dBc/Hz
@1 kHz
-120
dBc/Hz
@10 kHz
-140
dBc/Hz
@100 kHz
-147
dBc/Hz
@1 MHz
-147
dBc/Hz
Note 1: External crystal device must conform with Pullable Crystal Specifications listed on page 3.
MDS 3726-12 B
5
Revision 120505
Integrated Circuit Systems 525 Race Street, San Jose, CA 95126 tel (408) 297-1201 www.icst.com


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Part NumberDescriptionMFRS
ICS3726-12The function is HIGH PERFORMANCE VCXO. ICSTICST

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