ICS843S1333D Datasheet PDF - IDT

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ICS843S1333D
IDT

Part Number ICS843S1333D
Description Crystal-to-3.3V LVPECL Clock Synthesizer
Page 14 Pages


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Crystal-to-3.3V LVPECL Clock Synthesizer ICS843S1333D
DATA SHEET
General Description
ICS
HiPerClockS™
The ICS843S1333D is a high frequency clock
generator. The ICS843S1333D uses an external
20MHz crystal to synthesize 1333.33MHz. The
ICS843S1333D has excellent cycle-to-cycle and RMS
period jitter performance.
The ICS843S1333D operates at 3.3V operating supply and is
available in a fully RoHS compliant 8-lead TSSOP package.
Features
One differential LVPECL output
Crystal oscillator interface designed for 18pF, 20MHz parallel
resonant crystal
Cycle-to-Cycle Jitter: 14ps (maximum)
Period Jitter, RMS: 2.6ps (maximum)
Output Duty Cycle: 48 – 52%
Full 3.3V supply mode
0°C to 70°C ambient operating temperature
Available in lead-free (RoHS 6) package
Table 1. Frequency Table
Crystal Frequency (MHz)
20
Multiplier Value
66.67
Output Frequency (MHz)
1333.33
Block Diagram
OE Pullup
20MHz
XTAL_IN
OSC
XTAL_OUT
PLL Multiplier
(x66.67)
Q
nQ
Pin Assignment
VCCA
VEE
XTAL_OUT
XTAL_IN
1
2
3
4
8 VCC
7Q
6 nQ
5 OE
ICS843S1333D
8 Lead TSSOP
4.40mm x 3.0mm x 0.925mm package body
G Package
Top View
ICS843S1333DG REVISION A MAY 6, 2010
1
©2010 Integrated Device Technology, Inc.



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ICS843S1333D Data Sheet
CRYSTAL-TO-3.3V LVPECL CLOCK SYNTHESIZER
Table 2. Pin Descriptions
Number
Name
Type
Description
1
VCCA
Power
2 VEE Power
3,
4
XTAL_OUT
XTAL_IN
Input
Analog supply pin.
Negative supply pin.
Crystal oscillator interface. XTAL_IN is the input, XTAL_OUT is the output. External
tuning capacitor must be used for proper operation.
Synchronous output enable. When logic HIGH, the outputs are enabled and active.
5
OE
Input
Pullup When logic LOW, Q output is forced LOW and nQ output is forced HIGH.
LVCMOS/LVTTL interface levels.
6, 7
nQ, Q
Output
Differential output pair. LVPECL interface levels.
8 VCC Power
Core supply pin.
NOTE: Pullup refers to internal input resistors. See Table 2, Pin Characteristics, for typical values.
Table 3. Pin Characteristics
Symbol
CIN
RPULLUP
Parameter
Input Capacitance
Input Pullup Resistor
Test Conditions
Minimum
Typical
2
51
Maximum
Units
pF
k
ICS843S1333DG REVISION A MAY 6, 2010
2
©2010 Integrated Device Technology, Inc.



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ICS843S1333D Data Sheet
CRYSTAL-TO-3.3V LVPECL CLOCK SYNTHESIZER
Absolute Maximum Ratings
NOTE: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device.
These ratings are stress specifications only. Functional operation of product at these conditions or any conditions beyond
those listed in the DC Characteristics or AC Characteristics is not implied. Exposure to absolute maximum rating conditions for
extended periods may affect product reliability.
Item
Supply Voltage, VCC
Inputs, VI
XTAL_IN
Other Inputs
Outputs, IO
Continuos Current
Surge Current
Package Thermal Impedance, θJA
Storage Temperature, TSTG
Rating
4.6V
0V to VCC
-0.5V to VCC + 0.5V
50mA
100mA
115.2°C/W (0 mps)
-65°C to 150°C
DC Electrical Characteristics
Table 4A. Power Supply DC Characteristics, VCC = 3.3V ± 5%, VEE = 0V, TA = 0°C to 70°C
Symbol Parameter
Test Conditions
Minimum
Typical
VCC
VCCA
IEE
ICCA
Core Supply Voltage
Analog Supply Voltage
Power Supply Current
Analog Supply Current
3.135
VCC – 0.23
3.3
3.3
Maximum
3.465
VCC
80
23
Units
V
V
mA
mA
Table 4B. LVCMOS/LVTTL DC Characteristics, VCC = 3.3V ± 5%, VEE = 0V, TA = 0°C to 70°C
Symbol Parameter
Test Conditions
Minimum Typical
VIH Input High Voltage
VIL Input Low Voltage
IIH Input High Current
IIL Input Low Current
VCC = VIN = 3.465V
VCC = 3.465V, VIN = 0V
2
-0.3
-150
Maximum
VCC + 0.3
0.8
10
Units
V
V
µA
µA
Table 4C. LVPECL DC Characteristics, VCC = 3.3V ± 5%, VEE = 0V, TA = 0°C to 70°C
Symbol Parameter
Test Conditions
Minimum
VOH
VOL
VSWING
Output High Voltage; NOTE 1
Output Low Voltage; NOTE 1
Peak-to-Peak Output Voltage Swing
VCC – 1.3
VCC – 2.0
0.6
NOTE 1: Outputs termination with 50to VCC – 2V.
Typical
Maximum
VCC – 0.8
VCC – 1.6
1.0
Units
V
V
V
ICS843S1333DG REVISION A MAY 6, 2010
3
©2010 Integrated Device Technology, Inc.



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ICS843S1333D Data Sheet
CRYSTAL-TO-3.3V LVPECL CLOCK SYNTHESIZER
Table 5. Crystal Characteristics
Parameter
Mode of Oscillation
Frequency
Equivalent Series Resistance (ESR)
Shunt Capacitance
Test Conditions
Minimum Typical Maximum
Fundamental
20
50
7
Units
MHz
pF
AC Electrical Characteristics
Table 6. AC Characteristics, VCC = 3.3V ± 5%, VEE = 0V, TA = 0°C to 70°C
Symbol Parameter
Test Conditions
fOUT
tjit(cc)
Output Frequency
Cycle-to-Cycle Jitter; NOTE 1
tjit(per) Period Jitter, RMS; NOTE 1
tR / tF
odc
Output Rise/Fall Time
Output Duty Cycle
20% to 80%
Minimum
80
48
Typical
1333.33
Maximum
14
2.6
200
52
Units
MHz
ps
ps
ps
%
NOTE: Electrical parameters are guaranteed over the specified ambient operating temperature range, which is established when the device is
mounted in a test socket with maintained transverse airflow greater than 500 lfpm. The device will meet specifications after thermal equilibrium
has been reached under these conditions.
NOTE: External tuning capacitor must be used for proper operation.
NOTE 1: This parameter is defined in accordance with JEDEC Standard 65.
ICS843S1333DG REVISION A MAY 6, 2010
4
©2010 Integrated Device Technology, Inc.



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