A product Line of
Diodes Incorporated
PI6C49X0204B
Low Skew, 1-TO-4 LVCMOS/LVTTL Fanout Buffer
Features
Description
• Four LVCMOS / LVTTL outputs
• LVCMOS / LVTTL clock input
• CLK can accept the following input levels: LVCMOS,
LVTTL
• Maximum output frequency: 250MHz
• Additive phase jitter, RMS: 0.173ps (typical) @ 3.3V
• Output skew: 45ps (maximum) @ 3.3V
• Part-to-part skew: 500ps (maximum)
• Small 8 lead SOIC package saves board space
• Full 3.3V, 2.5V, 1.8V operation mode, or 3.3V/ 2.5V/ 1.8V
core with 2.5V, 1.8V, 1.5V supply modes
• -40°C to 85°C ambient operating temperature
The PI6C49X0204B is a low skew, 1-to-4 Fanout Buffer.
Guaranteed output and part-to-part skew characteristics
make the PI6C49X0204B ideal for those clock distribution
applications demanding well defined performance and
repeatability.
Block Diagram
Pin Assignment
Q0
Q1
CLK
Pulldown
Q2
VDDO
1
8
Q3
VDD
2
7
Q2
CLK
3
6
Q1
GND
4
5
Q0
Q3
PI6C49X0204B
Document Number DS40337 Rev 2-2
1
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© Diodes Incorporated
A product Line of
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PI6C49X0204B
Pin Descriptions
Pin#
Pin Name
Pin Type
Pin Description
1
VDDO
Power
Output supply pin.
2
VDD
Power
Positive supply pin.
3
CLK
Input
4
GND
Power
Power supply ground.
5
Q0
Output
Single clock output. LVCMOS / LVTTL interface levels.
6
Q1
Output
Single clock output. LVCMOS / LVTTL interface levels.
7
Q2
Output
Single clock output. LVCMOS / LVTTL interface levels.
8
Q3
Output
Single clock output. LVCMOS / LVTTL interface levels.
Pulldown
LVCMOS / LVTTL clock input.
Note: Pulldown refers to internal input resistors. See Table 2, Pin Characteristics, for typical values.
Pin Characteristics
Symbol
Parameter
CIN
Input Capacitance
CPD
Power Dissipation Capacitance
(per output)
R PULLDOWN
Input Pulldown Resistor
ROUT
Output Impedance
PI6C49X0204B
Document Number DS40337 Rev 2-2
Test Conditions
Min.
Typical
Max.
4
VDD , VDDO = 3.465V
pF
15
51
VDD , VDDO >2.5V
2
5
7
Units
pF
kΩ
12
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Ω
October 2017
© Diodes Incorporated
A product Line of
Diodes Incorporated
PI6C49X0204B
Maximum Ratings
(Above which useful life may be impaired. For user guidelines, not tested.)
Supply Voltage, VDD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.6V
Inputs, VI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5V to VDD +0.5V
Output, VO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5V to VDDO +0.5V
Package Thermal Impedance, θJA . . . . . . . . . . . . . 112.7°C/W (0 lfpm)
Storage Temperature, TSTG . . . . . . . . . . . . . . . . . . . . . . -65°C to 150°C
ESD Protection (HBM).................................................... 2000V
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.
Junction Temperature ........................................... 125 °C max
Table 3A. Power Supply DC Characteristics, TA = -45°C TO 85°C
Symbol
VDD
VDDO
Parameter
Core Supply Voltage
Output Power Supply Voltage
IDD
Power Supply Current
IDDO
Output Supply Current
PI6C49X0204B
Document Number DS40337 Rev 2-2
Conditions
Min.
Typ.
Max.
3.3V Operation
3.135
3.3
3.465
2.5V Operation
2.375
2.5
2.625
1.8V Operation
1.6
1.8
2.0
3.3V Supply
3.135
3.3
3.465
2.5V Supply
2.375
2.5
2.625
1.8V Supply
1.6
1.8
2.0
1.5V Supply
1.425
1.5
1.575
2
25MHz
12
200MHz
70
3
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Units
V
V
mA
mA
October 2017
© Diodes Incorporated
A product Line of
Diodes Incorporated
PI6C49X0204B
LVCMOS / LVTTL DC CHARACTERISTICS, TA = -45°C to 85°C
Symbol
Parameter
VIH
Input High Voltage
VIL
Input Low Voltage
IIH
Input High Current
VDD = VIN = 3.465V
IIL
Input Low Current
VDD = 3.465V, VIN = 0V
VOH
VOL
PI6C49X0204B
Output High Voltage
Output High Voltage
Document Number DS40337 Rev 2-2
Conditions
Min.
Typ.
Max.
VDD = 3.3V
2.3
VDD+0.3
VDD = 2.5V
1.7
VDD+0.3
VDD = 3.3V
-0.3
0.8
VDD = 2.5V
-0.3
0.8
150
Units
V
V
μA
-5
μA
VDDO =
3.3V
50Ω to VDDO /2
2.6
V
IOH = -100μA
2.9
V
VDDO =
2.5V
50Ω to VDDO /2
1.8
V
IOH = -100μA
2.2
V
VDDO =
1.8V
50Ω to VDDO /2
1.1
V
IOH = -100μA
1.5
V
VDDO =
1.5V
50Ω to VDDO /2
0.8
V
IOH = -100μA
1.2
V
VDDO =
3.3V
50Ω to VDDO /2
0.5
V
IOH = -100μA
0.2
V
VDDO =
2.5V
50Ω to VDDO /2
0.5
V
IOH = -100μA
0.2
V
VDDO =
1.8V
50Ω to VDDO /2
0.5
V
IOH = -100μA
0.2
V
VDDO =
1.5V
50Ω to VDDO /2
0.5
V
IOH = -100μA
0.2
V
4
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© Diodes Incorporated
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PI6C49X0204B
AC CHARACTERISTICS, VDD = 3.3V ± 5%, TA = -45°C to 85°C
Symbol
fMAX
tpLH
Parameter
Output Frequency
Propagation Delay, Low-to-High;
NOTE 1
Conditions
Min.
Typ.
Max.
VDDO = 3.3V
250
VDDO = 2.5V
250
VDDO = 1.8V
250
VDDO = 1.5V
250
VDDO = 3.3V, IJ
250MHz
1.2
1.9
VDDO = 2.5V, IJ
250MHz
1.5
2.5
VDDO = 1.8V, IJ
250MHz
1.8
3.1
VDDO = 1.5V, IJ
250MHz
1.9
3.8
Units
MHz
ns
tsk(o)
Output Skew; NOTE 2
25
100
ps
tsk(pp)
Part-to-Part Skew; NOTE 3
250
500
ps
tR
tF
odc
tjit
Output Rise Time NOTE 4
Output Fall Time NOTE 4
Output Duty Cycle
Additive RMS Jitter
VDDO = 3.3V
300
800
VDDO = 2.5V
300
1300
VDDO = 1.8V
500
1300
VDDO = 1.5V
800
1500
VDDO = 3.3V
300
800
VDDO = 2.5V
300
1300
VDDO = 1.8V
500
1300
VDDO = 1.5V
800
1500
IJ 133MHz
45
55
%
133MHz < IJ 200MHz
40
60
%
156.25MHz (@12kHz to
20MHz)
ps
ps
0.18
ps
125MHz (@12kHz to
0.05
ps
20MHz)
Parameters measured at f MAX unless otherwise noted.
NOTE 1: Measured from VDD /2 of the input to VDDO /2 of the output.
NOTE 2: Defined as skew between outputs at the same supply voltage and with equal load conditions. Measured at VDDO /2.
NOTE 3: Defined as skew between outputs on different devices operating at the same supply voltages and with equal load
conditions. Using the same type of inputs on each device, the outputs are measured at VDDO /2.
NOTE 4: Defined from 20% to 80%
PI6C49X0204B
Document Number DS40337 Rev 2-2
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© Diodes Incorporated
A product Line of
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PI6C49X0204B
AC CHARACTERISTICS, VDD = 2.5V ± 5%, TA = -45°C to 85°C
Symbol
fMAX
tpLH
Parameter
Output Frequency
Propagation Delay, Low-to-High;
NOTE 1
Conditions
Min.
Typ.
Max.
VDDO = 2.5V
250
VDDO = 1.8V
250
VDDO = 1.5V
250
VDDO = 2.5V, IJ
250MHz
1.6
2.5
VDDO = 1.8V, IJ
250MHz
2.5
3.2
VDDO = 1.5V, IJ
250MHz
3.3
4.5
Units
MHz
ns
tsk(o)
Output Skew; NOTE 2
50
90
ps
tsk(pp)
Part-to-Part Skew; NOTE 3
250
800
ps
tR
tF
odc
tjit
Output Rise Time NOTE 4
Output Fall Time NOTE 4
Output Duty Cycle
Additive RMS Jitter
VDDO = 2.5V
300
800
VDDO = 1.8V
500
1200
VDDO = 1.5V
700
1200
VDDO = 2.5V
300
800
VDDO = 1.8V
500
1200
VDDO = 1.5V
700
1200
IJ 133MHz
45
55
%
133MHz < IJ 200MHz
VDDO ≥ 1.5V
40
60
%
156.25MHz (@12kHz to
20MHz)
ps
ps
0.15
ps
125MHz (@12kHz to
0.05
ps
20MHz)
Parameters measured at f MAX unless otherwise noted.
NOTE 1: Measured from VDD /2 of the input to VDDO /2 of the output.
NOTE 2: Defined as skew between outputs at the same supply voltage and with equal load conditions. Measured at VDDO /2.
NOTE 3: Defined as skew between outputs on different devices operating at the same supply voltages and with equal load
conditions. Using the same type of inputs on each device, the outputs are measured at VDDO /2.
NOTE 4: Defined from 20% to 80%
PI6C49X0204B
Document Number DS40337 Rev 2-2
6
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© Diodes Incorporated
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PI6C49X0204B
AC CHARACTERISTICS, VDD = 1.8V ± 5%, TA = -45°C to 85°C
Symbol
Parameter
fMAX
Output Frequency
Conditions
Min.
Max.
Units
VDDO = 1.8V
250
MHz
VDDO = 1.5V
250
VDDO = 1.8V, IJ
250MHz
3.5
VDDO = 1.5V, IJ
250MHz
2.7
Typ.
4.8
tpLH
Propagation Delay, Low-to-High;
NOTE 1
tsk(o)
Output Skew; NOTE 2
50
90
ps
tsk(pp)
Part-to-Part Skew; NOTE 3
250
800
ps
tR
Output Rise Time NOTE 4
tF
Output Fall Time NOTE 4
odc
tjit
Output Duty Cycle
Additive RMS Jitter
ns
3.8
VDDO = 1.8V
300
1000
VDDO = 1.5V
500
1400
VDDO = 1.8V
300
1000
VDDO = 1.5V
500
1400
IJ 133MHz
45
55
%
133MHz < IJ 200MHz
VDDO ≥ 1.6V
40
60
%
VDDO < 1.6V
IJ 133MHz
40
60
%
156.25MHz (@12kHz to
20MHz)
ps
ps
0.1
ps
125MHz (@12kHz to
0.1
ps
20MHz)
Parameters measured at f MAX unless otherwise noted.
NOTE 1: Measured from VDD /2 of the input to VDDO /2 of the output.
NOTE 2: Defined as skew between outputs at the same supply voltage and with equal load conditions. Measured at VDDO /2.
NOTE 3: Defined as skew between outputs on different devices operating at the same supply voltages and with equal load
conditions. Using the same type of inputs on each device, the outputs are measured at VDDO /2.
NOTE 4: Defined from 20% to 80%
PI6C49X0204B
Document Number DS40337 Rev 2-2
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PI6C49X0204B
Phase Noise and Additive Jitter
Output phase noise plot provided below.
Additive jitter = √(Output jitter2 - Input jitter2)
Configuration Test Load Board Termination for LVCMOS Outputs
3.3V ±5%
VDD
VDDO
15pF
GND
Thermal Information
Symbol
Description
ΘJA
Junction-to-ambient thermal resistance
ΘJC
Junction-to-case thermal resistance
Condition
157 °C/W
Still air
42 °C/W
Part Marking
Diodes Incorporated Family
Device/PackageType
PI6C49X
0204BWIE
*YYWWXX
* : Die Rev
YY : Year
WW : Workweek
1st X : Assembly Code
2nd X : Fab Code
Note:
1. For latest datecode info, please check: https://www.diodes.com/assets/MediaList-Attachments/Pericom-Datecode-Format-Explanation.pdf
PI6C49X0204B
Document Number DS40337 Rev 2-2
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PI6C49X0204B
Package Outline Dimensions (All dimensions in mm)
PackageType: 8-pin SOIC
15-0103
Note:
1. For latest package info, please check: https://www.diodes.com/design/support/packaging/pericom-packaging/
Ordering Information(1-3)
Ordering Code
Package Code
PI6C49X0204BWIEX
W
Package Description
8-pin, Pb-free & Green, SOIC, Tape and Reel
Notes:
1. Thermal characteristics can be found on the company web site at https://www.diodes.com/design/support/packaging/pericom-packaging/
2. E = Pb-free and Green
3. Adding an X suffix = Tape/Reel
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Document Number DS40337 Rev 2-2
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IMPORTANT NOTICE
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER
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the companies whose products are represented on Diodes Incorporated website, harmless against all damages.
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This document is written in English but may be translated into multiple languages for reference. Only the English version of this document is the final and determinative format released by Diodes Incorporated.
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