DATASHEET
ZERO DELAY LOW SKEW BUFFER AND MULTIPLIER ICS671-01
IDT™ / ICS™
ZERO DELAY LOW SKEW BUFFER AND MULTIPLIER 1
ICS671-01 REV F 051310
Description
The ICS671-01 is a low phase noise, high speed PLL
based, 8 output, low skew zero delay buffer and multiplier.
Based on IDT’s proprietary low jitter Phase Locked Loop
(PLL) techniques, the device provides eight low skew
outputs at speeds up to 160 MHz at 3.3V. The part includes
a bank of six outputs running at either x2 or x4 mode, one
output running at either x2, x4, or x4 mode, and one
additional output running at either x1, x2, or x4 mode. For
normal operation as a zero delay buffer, any output clock is
tied to the FBIN pin.
IDT manufactures the largest variety of clock generators
and buffers and is the largest clock supplier in the world.
Features
•Packaged in 16 pin SOIC
•Pb (lead) free package, RoHS compliant
•Clock outputs from 5 to 160 MHz
•Zero input-output delay
•Integrated x2 or x4 selections, and x5 for CLK7
•Eight low-skew (<250 ps) outputs
•Full CMOS outputs with 25 mA output drive capability at
TTL levels
•Tri-state mode for board-level testing
•Advanced, low power, sub-micron CMOS process
•Operating voltage of 3.3V or 5V
Block Diagram
CLK4
CLK5
CLK3
CLK6
CLK7
CLK2
CLK1
CLK8
Control
Logic
S1, S0
x2, x4, or x5
PLL
CLKIN
FBIN
2
VDD
2
GND
2
ICS671-01
ZERO DELAY LOW SKEW BUFFER AND MULTIPLIER ZDB AND MULTIPLIER
IDT™ / ICS™
ZERO DELAY LOW SKEW BUFFER AND MULTIPLIER 2
ICS671-01 REV F 051310
Pin Assignment
Output Clock Mode Select Table
Note 1. Outputs are in high impedence state
Note 2: In S1:S0 = 01 Mode, only the x1 output on CLK 8 will be zero delay. The x2 and x5 outputs can power-up in different
states so the skew relationship is not defined.
Pin Descriptions
12
1
11
2
10
CLKIN FBIN
3
9
CLK1
4
CLK2
CLK8
5
VDD
6
CLK7
7
GND
8
CLK3
VDD
GND
CLK6
CLK4 CLK5
S0 S1
16
15
14
13
16 pin narrow (150 mil) SOIC
S1 S0 CLK1:6 CLK7 CLK8 Input Range
0 0 Tri-state (note 1) Tri-state (note 1) Tri-state (note 1) -
0 1 x2 (note 2) x5 (note 2) x1 5 to 30 MHz
1 0 x2 x2 x2 15 to 80 MHz
1 1 x4 x4 x4 7.5 to 40 MHz
Pin
Number
Pin
Name
Pin Type Pin Description
1 CLKIN Input Clock input.
2-3, 6-7, 10-11 CLK1:6 Output Clock outputs 1:6. See table above.
4 VDD Power Power supply. Connect both pins to the same voltage (either 3.3V or 5V).
5 GND Power Connect to ground.
8 S0 Input Select input 0. See table above.
9 S1 Input Select input 1. See table above.
12 GND Power Connect to ground.
13 VDD Power Power supply. Connect both pins to the same voltage (either 3.3V or 5V).
14 CLK7 Output Clock output 7. See table above.
15 CLK8 Output Clock output 8. See table above. Normally use this clock as feedback.
16 FBIN Input Feedback input. Connect to CLK8 under normal operations.
ICS671-01
ZERO DELAY LOW SKEW BUFFER AND MULTIPLIER ZDB AND MULTIPLIER
IDT™ / ICS™
ZERO DELAY LOW SKEW BUFFER AND MULTIPLIER 3
ICS671-01 REV F 051310
External Components
The ICS671-01 requires a minimum number of external components for proper operation. Decoupling capacitors of
0.01mF should be connected between VDD and GND on pins 4 and 5, and VDD and GND on pins 13 and 12, as
close to the device as possible. A series termination resistor of 33Ω may be used to each clock output pin to reduce
reflections.
Absolute Maximum Ratings
Stresses above the ratings listed below can cause permanent damage to the ICS671-01. 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.
Recommended Operation Conditions
DC Electrical Characteristics
VDD=3.3V ±10%, Ambient temperature 0 to +70°C, unless stated otherwise
Item Rating
Supply Voltage, VDD 7V
All Inputs and Outputs -0.5V to VDD+0.5V
CLKIN and FBIN inputs -0.5V to 5.5V
Electrostatic Discharge 2000 V
Ambient Operating Temperature 0 to +70°C
Storage Temperature -65 to +150°C
Junction Temperature 150°C
Soldering Temperature 260°C
Parameter Min. Typ. Max. Units
Ambient Operating Temperature 0 +70 °C
Power Supply Voltage (measured in respect to GND) +3.13 +5.50 V
Parameter Symbol Conditions Min. Typ. Max. Units
Operating Voltage VDD 3.13 5.5 V
Input High Voltage VIH CLKIN VDD/2+1 VDD/2 V
Input Low Voltage VIL CLKIN VDD/2 VDD/2-1 V
Input High Voltage VIH 2V
Input Low Voltage VIL 0.8 V
Input Low Current IIL VIN = 0V 50 µA
Input High Current IIH VIN = VDD 100 µA
Output High Voltage VOH IOH = -25 mA 2.4 V
ICS671-01
ZERO DELAY LOW SKEW BUFFER AND MULTIPLIER ZDB AND MULTIPLIER
IDT™ / ICS™
ZERO DELAY LOW SKEW BUFFER AND MULTIPLIER 4
ICS671-01 REV F 051310
AC Electrical Characteristics
VDD = 3.3V ±10%, Ambient Temperature 0 to +70°C, CLOAD at CLK = 15 pF, unless stated otherwise
Note 1: With CLKIN = 20 MHz, FBIN to CLK8, all outputs at 40 MHz.
Note 2:With CLKIN = 80 MHz, FBIN to CLK8, all outputs at 160 MHz.
Note 3: These specs do not apply to mode 01.
Thermal Characteristics (16 pin SOIC)
Ouput Low Voltage VOL IOL = 25mA 0.4 V
Output High Voltage,
CMOS level
VOH IOH = -8 mA VDD-0.4 V
Operating Supply Current IDD No Load, S1 = 1, S0 = 0,
Note 1
25 mA
No Load, S1 = 1, S0 =0
Note 2
Power Down Supply
Current
IDDPD CLKIN = 0, S0 = 0, S1 = 0 500 µA
Short Circuit Current IOS Each output ±50 mA
Input Capacitance CIN S0, S1, FBIN 7 pF
Parameter Symbol Conditions Min. Typ. Max. Units
Parameter Symbol Conditions Min. Typ. Max. Units
Input Clock Frequency fIN See table on page 2 5 80 MHz
Output Clock Frequency See table on page 2 5 160 MHz
Output Rise Time tOR 0.8 to 2.0V, CL=30 pF 1.5 ns
Output Fall Time tOF 2.0 to 0.8V, CL=30 pF 1.5 ns
Output Clock Duty Cycle tDC measured at VDD/2 40 50 60 %
Device to Device Skew rising edges at VDD/2, Note 3 700 ps
Output to Output Skew rising edges at VDD/2, Note 3 250 ps
Input to Output Skew rising edges at VDD/2, FBIN to
CLK8
±350 ps
Maximum Absolute JItter 15 pF 300 ps
Cycle to Cycle Jitter 30 pF loads 500 ps
PLL Lock Time Note 3 1.0 ms
Parameter Symbol Conditions Min. Typ. Max. Units
Thermal Resistance Junction to
Ambient
θJA Still air 120 °C/W
θJA 1 m/s air flow 115 °C/W
θJA 3 m/s air flow 105 °C/W
Thermal Resistance Junction to Case θJC 58 °C/W
ICS671-01
ZERO DELAY LOW SKEW BUFFER AND MULTIPLIER ZDB AND MULTIPLIER
IDT™ / ICS™
ZERO DELAY LOW SKEW BUFFER AND MULTIPLIER 5
ICS671-01 REV F 051310
Package Outline and Package Dimensions (16 pin SOIC, 150 Mil. Narrow Body)
Package dimensions are kept current with JEDEC Publication No. 95
Ordering Information
"LF" suffix to the part number are the Pb-Free configuration and are RoHS compliant.
While the information presented herein has been checked for both accuracy and reliability, Integrated Device Technology (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.
Part / Order Number Marking Shipping Packaging Package Temperature
671M-01LF ICS671M-01LF Tubes 16-pin SOIC 0 to +70° C
671M-01LFT ICS671M-01LF Tape and Reel 16-pin SOIC 0 to +70° C
INDEX
AREA
1 2
16
D
E
SEATING
PLANE
A1
A
e
- C -
B
.10 (.004) C
C
L
H
h x 45
Millimeters Inches
Symbol Min Max Min Max
A 1.35 1.75 .0532 .0688
A1 0.10 0.25 .0040 .0098
B 0.330.51.013.020
C 0.19 0.25 .0075 .0098
D 9.80 10.00 .3859 .3937
E 3.80 4.00 .1497 .1574
e 1.27 BASIC 0.050 BASIC
H 5.80 6.20 .2284 .2440
h 0.250.50.010.020
L 0.401.27.016.050
α0°8°0°8°
© 2006 Integrated Device Technology, Inc. All rights reserved. Product specifications subject to change without notice. IDT and the IDT logo are trademarks of Integrated Device
Technology, Inc. Accelerated Thinking is a service mark of Integrated Device Technology, Inc. All other brands, product names and marks are or may be trademarks or registered
trademarks used to identify products or services of their respective owners.
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www.idt.com
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www.idt.com/go/clockhelp
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ICS671-01
ZERO DELAY LOW SKEW BUFFER AND MULTIPLIER ZDB AND MULTIPLIER
