DATASHEET
ICS2402
MULTIPLIER AND ZERO DELAY BUFFER
Description
Features
The ICS2402 is a high-performance Zero Delay Buffer
(ZDB) which integrates IDT’s proprietary analog/digital
Phase-Locked Loop (PLL) techniques. The chip is part
of IDT’s ClockBlocksTM family and was designed as a
performance upgrade to meet today’s higher speed and
lower voltage requirements. The zero delay feature
means that the rising edge of the input clock aligns with
the rising edges of both output clocks, giving the
appearance of no delay through the device.
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•
•
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The ICS2402 is ideal for synchronizing outputs in a
large variety of systems, from personal computers to
data communications to graphics/video. By allowing
off-chip feedback paths, the device can eliminate the
delay through other devices.
•
•
8-pin SOIC package – Pb-free, RoHS compliant
Absolute jitter ±100 ps
Propagation Delay of ±600 ps
Output multiplier of 2X
Output clock frequency up to 80 MHz
Can recover degraded input clock duty cycle
Output clock duty cycle of 45/55
Full CMOS clock swings with 25 mA drive capability
at TTL levels
Advanced, low power CMOS process
Operating voltage of 3.3 V or 5 V
Block Diagram
ICLK
S0
FBIN
divide
by N
IDT™ / ICS™ MULTIPLIER AND ZERO DELAY BUFFER
Phase
Detector,
Charge
Pump,
and
Loop
Filter
VCO
1
CLK1
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ZDB AND MULTIPLIER
Pin Assignment
ICLK
1
8
CLK
NC
2
7
VDD
GND
3
6
S0
FBIN
4
5
NC
8 pin (150 mil) SOIC
Clock Multiplier Decoding Table 1
(Multiplies Input clock by shown amount)
S0
CLK
0
1
2 X ICLK
ICLK
Pin Descriptions
Pin
Number
Pin
Name
Pin
Type
1
2
3
4
5
6
7
8
ICLK
NC
GND
FBIN
NC
S0
VDD
CLK
Input
—
Power
Input
—
Input
Power
Output
Pin Description
Reference clock input.
No connect. Do not connect to anything.
Connect to ground.
Feedback clock input.
No connect. Do not connect to anything.
Select pin for Clock Multiplier Decoding Table above.
Connect to +3.3 V or +5.0 V.
Clock output per table above.
IDT™ / ICS™ MULTIPLIER AND ZERO DELAY BUFFER
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External Components
The ICS2402 requires a 0.01µF decoupling capacitor to be connected between VDD and GND. It must be
connected close to the part to minimize lead inductance. No external power supply filtering is required for
this device. A 33Ω series terminating resistor can be used next to each output pin.
Absolute Maximum Ratings
Stresses above the ratings listed below can cause permanent damage to the ICS2402. These ratings,
which are standard values for IDT commercially rated parts, are stress ratings only. Functional operation of
the device at these or any other conditions above those indicated in the operational sections of the
specifications is not implied. Exposure to absolute maximum rating conditions for extended periods can
affect product reliability. Electrical parameters are guaranteed only over the recommended operating
temperature range.
Item
Rating
Supply Voltage, VDD
7V
All Inputs and Outputs
-0.5 V to VDD+0.5 V
Ambient Temperature under Bias
-55 to 125° C
Storage Temperature
-65 to +150° C
Junction Temperature
125° C
Power Dissipation
0.5 W
Recommended Operation Conditions
Parameter
Min.
Ambient Operating Temperature
Typ.
0
Max.
Units
+70
°C
Power Supply Voltage (measured in respect to GND)
+4.5
+5.0
+5.5
V
Power Supply Voltage (measured in respect to GND)
+3.15
+3.3
+3.45
V
IDT™ / ICS™ MULTIPLIER AND ZERO DELAY BUFFER
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DC Electrical Characteristics
VDD = 3.3 V ±5%, Ambient Temperature 0 to +70° C
Parameter
Symbol Conditions
Operating Voltage
VDD
Operating Current
IDD
Input High Voltage
VIH
ICLK, FBIN, S0
Input Low Voltage
VIL
ICLK, FBIN, S0
Output High Voltage
VOH
IOH = -12 mA
Output Low Voltage
VOL
IOL = 12 mA
Short Circuit Current
IOS
CLK
Input Capacitance
CIN
S0
Min.
Typ.
3.15
Max.
Units
3.45
V
20
mA
2
V
0.8
2.4
V
V
0.4
V
±50
mA
5
pF
VDD = 5 V ±10%, Ambient Temperature 0 to +70° C
Parameter
Symbol Conditions
Operating Voltage
VDD
Operating Current
IDD
Input High Voltage
VIH
ICLK, FBIN, S0
Input Low Voltage
VIL
ICLK, FBIN, S0
Output High Voltage
VOH
IOH = -12 mA
Output Low Voltage
VOL
IOL = 12 mA
Short Circuit Current
ISC
Each output
Input Capacitance
CIN
S0
IDT™ / ICS™ MULTIPLIER AND ZERO DELAY BUFFER
5V
Min.
Typ.
4.5
Max.
Units
5.5
V
30
4
mA
0.7xVDD
V
0.2xVDD
4.5
V
V
0.5
V
±80
mA
5
pF
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AC Electrical Characteristics
VDD = 3.3 V ±5%, or 5 V ±10%, Ambient Temperature 0 to +70° C
Parameter
Symbol
Input Frequency, ICLK
Conditions
Min.
Typ.
Max. Units
S0=1
10
80
MHz
S0=0
10
40
MHz
10
80
MHz
Output Frequency, CLK
Input to Output Jitter
CLK>20 MHz, Note 2
200
ps
Absolute Short-term Jitter,
peak-to-peak
Note 2
±100
ps
Input to Output Skew
Note 1
Output Clock Rise Time
20% to 80%, Note 2
1.5
ns
Output Clock Fall Time
80% to 20%, Note 2
1.5
ns
Output Clock Duty Cycle
At VDD/2, Note 2
-600
45
600
50
55
ps
%
Note 1: Assumes clocks with same rise time, measured from rising edges at VDD/2
Note 2: Measured with a 15 pF load.
Thermal Characteristics
Parameter
Thermal Resistance Junction to
Ambient
Thermal Resistance Junction to Case
IDT™ / ICS™ MULTIPLIER AND ZERO DELAY BUFFER
Symbol
Conditions
Min.
Typ.
Max. Units
θJA
Still air
150
° C/W
θJA
1 m/s air flow
140
° C/W
θJA
3 m/s air flow
120
° C/W
40
° C/W
θJC
5
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Package Outline and Package Dimensions (8-pin SOIC, 150 Mil. Body)
Package dimensions are kept current with JEDEC Publication No. 95
8
E
H
INDEX
AREA
1 2
D
Symbol
A
A1
B
C
D
E
e
H
h
L
α
Millimeters
Inches
Min
Max
1.35
1.75
0.10
0.25
0.33
0.51
0.19
0.25
4.80
5.00
3.80
4.00
1.27 BASIC
5.80
6.20
0.25
0.50
0.40
1.27
0°
8°
Min
Max
.0532
.0688
.0040
.0098
.013
.020
.0075
.0098
.1890
.1968
.1497
.1574
0.050 BASIC
.2284
.2440
.010
.020
.016
.050
0°
8°
A
h x 45
A1
C
- Ce
B
SEATING
PLANE
.10 (.004)
L
C
Ordering Information
Part / Order Number
Marking
Shipping Packaging
Package
Temperature
2402MLF
2402MLFT
2402MLF
2402MLF
Tubes
Tape and Reel
8-pin SOIC
8-pin SOIC
0 to +70° C
0 to +70° C
“LF” denotes Pb (lead) free package, RoHS compliant.
While the information presented herein has been checked for both accuracy and reliability, IDT assumes no
responsibility for either its use or for the infringement of any patents or other rights of third parties, which would result
from its use. No other circuits, patents, or licenses are implied. This product is intended for use in normal commercial
applications. Any other applications such as those requiring extended temperature range, high reliability, or other
extraordinary environmental requirements are not recommended without additional processing by IDT. IDT reserves
the right to change any circuitry or specifications without notice. IDT does not authorize or warrant any IDT product
for use in life support devices or critical medical instruments.
IDT™ / ICS™ MULTIPLIER AND ZERO DELAY BUFFER
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Revision History
Rev.
Originator
Date
Description of Change
B
P.Griffith
10/05/04
New device/datasheet for HP.
C
S. Gardner
11/04/04
Changed values for Abs. Jitter, Prop. Delay, and Output Clock Freq. in “Features” section;
removed secondary Input High/Low and Output High (CMOS) voltage specs in DC chars;
multiple updates to AC chars and added 5 V +/-10% rating; move from Preliminary to
Release.
D
P.Griffith
12/21/04
Added LF packaging and ordering information. Released from custom to standard device.
E
—
08/18/09
Added EOL note per PDN U-09-01.
F
—
05/13/10
Removed EOL note and non-green orderables.
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