ICS843S1333 Datasheet PDF - IDT

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ICS843S1333
IDT

Part Number ICS843S1333
Description CRYSTAL-TO-3.3V LVPECL CLOCK SYNTHESIZER
Page 13 Pages


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CRYSTAL-TO-3.3V LVPECL CLOCK SYNTHESIZER
ICS843S1333
General Description
The ICS843S1333 is a high frequency clock
ICS generator and is a member of the HiPerClockS™
HiPerClockS™ family of High Performance Clock Solutions from
IDT. The ICS843S1333 uses an external 20MHz
crystal to synthesize 1333.33MHz. The
ICS843S1333 has excellent cycle-to-cycle and RMS period jitter
performance.
The ICS843S1333 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: 25ps (maximum)
Period Jitter, RMS: 2ps (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) packages
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)
DQ
CLK
Pin Assignment
VCCA 1
8 VCC
VEE 2
7Q
Q
XTAL_OUT 3
6 nQ
XTAL_IN 4
5 OE
nQ
ICS843S1333
8 Lead TSSOP
4.40mm x 3.0mm x 0.925mm package body
G Package
Top View
IDT™ / ICS™ 3.3V LVPECL CLOCK SYNTHESIZER
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ICS843S1333CG REV. A AUGUST 28, 2008



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ICS843S1333
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.
Synchronous output enable. When logic HIGH, the outputs are enabled and
5
OE
Input
Pullup active. 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
4
51
Maximum
Units
pF
k
IDT™ / ICS™ 3.3V LVPECL CLOCK SYNTHESIZER
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ICS843S1333
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
Outputs, IO
Continuos Current
Surge Current
Package Thermal Impedance, θJA
Storage Temperature, TSTG
Rating
4.6V
-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 – 0.20
3.3
3.3
Maximum
3.465
VCC
55
20
Units
V
V
mA
mA
Table 4C. 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
IDT™ / ICS™ 3.3V LVPECL CLOCK SYNTHESIZER
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ICS843S1333CG REV. A AUGUST 287, 2008



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ICS843S1333
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
Parameter Symbol
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%
NOTE 1: This parameter is defined in accordance with JEDEC Standard 65.
Minimum
100
48
Typical
1333.33
Maximum
25
2
200
52
Units
MHz
ps
ps
ps
%
IDT™ / ICS™ 3.3V LVPECL CLOCK SYNTHESIZER
4
ICS843S1333CG REV. A AUGUST 28, 2008



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