Crystal-to-3.3V LVPECL Clock
Synthesizer
843S1333D
Data Sheet
General Description
The 843S1333D is a high frequency clock generator. The
843S1333D uses an external 20MHz crystal to synthesize
1333.33MHz. The 843S1333D has excellent cycle-to-cycle and
RMS period jitter performance.
The 843S1333D 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
Pin Assignment
V
CCA
Q
XTAL_IN
OSC
PLL Multiplier
(x66.67)
nQ
XTAL_OUT
V
EE
XTAL_OUT
XTAL_IN
1
2
3
4
8
7
6
5
V
CC
Q
nQ
OE
843S1333D
8 Lead TSSOP
4.40mm x 3.0mm x 0.925mm package body
G Package
Top View
©2015 Integrated Device Technology, Inc
1
Revision A
December 2, 2015
843S1333D Data Sheet
Table 2. Pin Descriptions
Number
1
2
3,
4
5
6, 7
8
Name
V
CCA
V
EE
XTAL_OUT
XTAL_IN
OE
nQ, Q
V
CC
Power
Power
Input
Type
Description
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.
Pullup
Synchronous output enable. When logic HIGH, the outputs are enabled and active.
When logic LOW, Q output is forced LOW and nQ output is forced HIGH.
LVCMOS/LVTTL interface levels.
Differential output pair. LVPECL interface levels.
Core supply pin.
Input
Output
Power
NOTE:
Pullup
refers to internal input resistors. See Table 2,
Pin Characteristics,
for typical values.
Table 3. Pin Characteristics
Symbol
C
IN
R
PULLUP
Parameter
Input Capacitance
Input Pullup Resistor
Test Conditions
Minimum
Typical
2
51
Maximum
Units
pF
k
©2015 Integrated Device Technology, Inc
2
Revision A
December 2, 2015
843S1333D Data Sheet
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, V
CC
Inputs, V
I
XTAL_IN
Other Inputs
Outputs, I
O
Continuos Current
Surge Current
Package Thermal Impedance,
JA
Storage Temperature, T
STG
Rating
4.6V
0V to V
CC
-0.5V to V
CC
+ 0.5V
50mA
100mA
115.2C/W (0 mps)
-65C to 150C
DC Electrical Characteristics
Table 4A. Power Supply DC Characteristics,
V
CC
= 3.3V ± 5%, V
EE
= 0V, T
A
=
0°C to 70°C
Symbol
V
CC
V
CCA
I
EE
I
CCA
Parameter
Core Supply Voltage
Analog Supply Voltage
Power Supply Current
Analog Supply Current
Test Conditions
Minimum
3.135
V
CC
– 0.23
Typical
3.3
3.3
Maximum
3.465
V
CC
80
23
Units
V
V
mA
mA
Table 4B. LVCMOS/LVTTL DC Characteristics,
V
CC
= 3.3V ± 5%, V
EE
= 0V, T
A
=
0°C to 70°C
Symbol
V
IH
V
IL
I
IH
I
IL
Parameter
Input High Voltage
Input Low Voltage
Input High Current
Input Low Current
V
CC
= V
IN
= 3.465V
V
CC
= 3.465V, V
IN
= 0V
-150
Test Conditions
Minimum
2
-0.3
Typical
Maximum
V
CC
+ 0.3
0.8
10
Units
V
V
µA
µA
Table 4C. LVPECL DC Characteristics,
V
CC
= 3.3V ± 5%, V
EE
= 0V, T
A
=
0°C to 70°C
Symbol
V
OH
V
OL
V
SWING
Parameter
Output High Voltage; NOTE 1
Output Low Voltage; NOTE 1
Peak-to-Peak Output Voltage Swing
Test Conditions
Minimum
V
CC
– 1.3
V
CC
– 2.0
0.6
Typical
Maximum
V
CC
– 0.8
V
CC
– 1.6
1.0
Units
V
V
V
NOTE 1: Outputs termination with 50 to V
CC
– 2V.
©2015 Integrated Device Technology, Inc
3
Revision A
December 2, 2015
843S1333D Data Sheet
Table 5. Crystal Characteristics
Parameter
Mode of Oscillation
Frequency
Equivalent Series Resistance (ESR)
Shunt Capacitance
Test Conditions
Minimum
Typical
Fundamental
20
50
7
MHz
Maximum
Units
pF
AC Electrical Characteristics
Table 6. AC Characteristics,
V
CC
= 3.3V ± 5%, V
EE
= 0V, T
A
=
0°C to 70°C
Symbol
f
OUT
tjit(cc)
tjit(per)
t
R
/ t
F
odc
Parameter
Output Frequency
Cycle-to-Cycle Jitter; NOTE 1
Period Jitter, RMS; NOTE 1
Output Rise/Fall Time
Output Duty Cycle
20% to 80%
80
48
Test Conditions
Minimum
Typical
1333.33
14
2.6
200
52
Maximum
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.
©2015 Integrated Device Technology, Inc
4
Revision A
December 2, 2015
843S1333D Data Sheet
Parameter Measurement Information
2V
2V
nQ
V
CC
V
CCA
Q
tcycle
n
tcycle
n+1
tjit(cc)
=
|
tcycle
n –
tcycle
n+1
|
1000 Cycles
-1.3V±0.165V
3.3V LVPECL Output Load AC Test Circuit
Cycle-to-Cycle Jitter
V
OH
V
REF
V
OL
Q
nQ
1σ contains 68.26% of all measurements
2σ contains 95.4% of all measurements
3σ contains 99.73% of all measurements
4σ contains 99.99366% of all measurements
6σ contains (100-1.973x10
-7
)% of all measurements
Reference Point
(Trigger Edge)
Histogram
Mean Period
(First edge after trigger)
RMS Period Jitter
Output Rise/Fall Time
nQ
Q
Output Duty Cycle/Pulse Width/Period
©2015 Integrated Device Technology, Inc
5
Revision A
December 2, 2015
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