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ICS2305
3.3 VOLT ZERO DELAY, LOW SKEW BUFFER
Description
The ICS2305 is a low phase noise, high-speed PLL based, low-skew zero delay buffer. Based on ICS' proprietary low jitter Phase Locked Loop (PLL) techniques, the device provides four low skew outputs at speeds up to 133 MHz at 3.3 V. The outputs can be generated from the PLL (for zero delay), or directly from the input (for testing), and can be set to tri-state mode or to stop at a low level. The PLL feedback is on-chip and is obtained from the CLKOUT pad. The ICS2305 is available in two different versions. The ICS2305-1 is the base part. The ICS2305-1H is a high drive version with faster rise and fall times.
Features
* * * * * * * * * * * *
Clock outputs from 10 to 133 MHz Zero input-output delay Four low skew (<250 ps) outputs Device-to-device skew <700 ps Full CMOS outputs with 25 mA output drive capability at TTL levels 5 V tolerant CLKIN Tri-state mode for board-level testing Advanced, low power, sub-micron CMOS process Operating voltage of 3.3 V Industrial temperature range available Packaged in 8-pin SOIC Available in Pb (lead ) free package
Block Diagram
VDD
CLKIN
PLL
CLKOUT CLK1 CLK2 CLK3 CLK4
GND
MDS 2305 D I n t e gra te d C i r c u i t S y s te m s
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ICS2305 3.3 VOLT ZERO DELAY, LOW SKEW BUFFER
Pin Assignment
CLKIN CLK2 CLK1 GND
1 2 3 4
8 7 6 5
CLKOUT CLK4 VDD CLK3
8 pin ( 150 mil ) SOIC
Pin Descriptions
Pin Number 1 2 3 4 5 6 7 8 Pin Name CLKIN CLK2 CLK1 GND CLK3 VDD CLK4 CLKOUT Pin Type Input Output Power Power Output Power Output Output Clock input (5 V tolerant). Buffered Clock output 2. Buffered Clock output 1 Connect to ground. Buffered Clock output 3 Power supply. Connect to 3.3 V. Buffered Clock output 4. Buffered output. Internall feedback on this pin. Pin Description
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ICS2305 3.3 VOLT ZERO DELAY, LOW SKEW BUFFER
External Components
The ICS2305 requires a minimum number of external components for proper operation. Decoupling capacitors of 0.01 mF 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 33 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 ICS2305. These ratings, which are standard values for ICS 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
Supply Voltage, VDD All Inputs and Outputs CLKIN and FBIN inputs Electrostatic Discharge (HBM) Ambient Operating Temperature (Commercial) Ambient Operating Temperature (Industrial) Storage Temperature Junction Temperature Soldering Temperature 7V
Rating
-0.5 V to VDD+0.5 V -0.5 V to 5.5 V 2000 V 0 to +70C -40 to +85C -65 to +150C 150C 260C
Recommended Operation Conditions
Parameter
Ambient Operating Temperature (Industrial) Ambient Operating Temperature (Commercial) Power Supply Voltage (measured in respect to GND)
Min.
-40 0 +3.0
Typ.
Max.
+85 +70 +3.6
Units
C C
V
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ICS2305 3.3 VOLT ZERO DELAY, LOW SKEW BUFFER
DC Electrical Characteristics
ICS2305M-XX, VDD = 3.3 V 10%, Ambient Temperature -40 to +85C(Industrial), (0-70C Commercial)
Parameter
Operating Voltage Input High Voltage Input Low Voltage Input Low Current Input High Current Output High Voltage Output Low Voltage Operating Supply Current Power Down Supply Current Short Circuit Current Input Capacitance
Symbol
VDD VIH VIL IIL IIH VOH VOL IDD
Conditions
Min.
3.0 2
Typ.
Max.
3.6 0.8
Units
V V V
A A
VIN = 0V VIN = VDD IOH = -12 mA IOL = 12 mA No Load CLKIN = 0, Note 1 2.4
50 100 0.4 32 12 50 5
V V mA
A
IOS CIN
Each output CLKIN
mA pF
Note 1: When there is no clock signal present at CLKIN, the ICS2305 will enter power down mode. The PLL is stopped and the outputs are tri-state.
AC Electrical Characteristics
ICS2305M-1, VDD=3.3 V 10%, Ambient temperature -40 to +85C(Industrial), (0-70C Commercial)
Parameter
Output Clock Frequency Output Clock Frequency Output Rise Time Output Fall Time Output Clock Duty Cycle Output Clock Duty Cycle Device to Device Skew Output to Output Skew Input to Output Skew Cycle to Cycle Jitter PLL Lock Time
Symbol
fIN tOR tOF tDC tDC
Conditions
10 pF load 30 pF load 0.8 to 2.0 V, outputs loaded 2.0 to 0.8 V, outputs loaded measured at 1.4V, Fout=66.67 MHz measured at 1.4V, Fout=50 MHz rising edges at VDD/2 rising edges at VDD/2 rising edges at VDD/2 measured at 66.67M, outputs loaded Note 2
Min.
10 10
Typ.
Max. Units
133 100 2.5 2.5 MHz MHz ns ns % % ps ps ps ps ms
40 45
50 50
60 55 700 250 350 200 1.0
Note 2: With VDD at a steady rate and valid input at CLKIN.
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ICS2305 3.3 VOLT ZERO DELAY, LOW SKEW BUFFER
ICS2305M-1H, VDD=3.3 V 10%, Ambient temperature -40 to +85C(Industrial), (0-70C Commercial),
Parameter
Output Clock Frequency Output Clock Frequency Output Rise Time Output Fall Time Output Clock Duty Cycle Output Clock Duty Cycle Device to Device Skew Output to Output Skew Input to Output Skew Cycle to Cycle Jitter PLL Lock Time
Symbol
fIN tOR tOF tDC tDC
Conditions
10 pF load 30 pF load 0.8 to 2.0 V, outputs loaded 2.0 to 0.8 V, outputs loaded measured at 1.4V, Fout=66.67 MHz measured at 1.4V, Fout=50 MHz rising edges at VDD/2 rising edges at VDD/2 rising edges at VDD/2 measured at 66.67M, outputs loaded Note 3
Min.
10 10
Typ.
Max. Units
133 100 1.5 1.5 MHz MHz ns ns % % ps ps ps ps ms
40 45
50 50
60 55 700 250 350 200 1.0
Note 3: With VDD at a steady rate and valid input at CLKIN
Thermal Characteristics
Parameter
Thermal Resistance Junction to Ambient
Symbol
JA JA JA JC
Conditions
Still air 1 m/s air flow 3 m/s air flow
Min.
Typ.
120 115 105 58
Max. Units
C/W C/W C/W C/W
Thermal Resistance Junction to Case
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ICS2305 3.3 VOLT ZERO DELAY, LOW SKEW BUFFER
Package Outline and Package Dimensions (8-pin SOIC, 150 Mil. Narrow Body)
Package dimensions are kept current with JEDEC Publication No. 95
8
Millimeters Symbol Min Max
Inches Min Max
E INDEX AREA
H
12 D
A A1 B C D E e H h L
h x 45
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
.0532 .0688 .0040 .0098 .013 .020 .0075 .0098 .1890 .1968 .1497 .1574 0.050 BASIC .2284 .2440 .010 .020 .016 .050 0 8
A A1
C
-Ce
B SEATING PLANE L
.10 (.004)
C
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ICS2305 3.3 VOLT ZERO DELAY, LOW SKEW BUFFER
Ordering Information
Part / Order Number
ICS2305MI-1 ICS2305MI-1T ICS2305MI-1H ICS2305MI-1HT ICS2305MI-1LF ICS2305MI-1LFT ICS2305MI-1HLF ICS2305MI-1HLFT ICS2305M-1 ICS2305M-1T ICS2305M-1H ICS2305M-1HT ICS2305M-1LF ICS2305M-1LFT ICS2305M-1HLF ICS2305M-1HLFT
Marking
2305MI-1 2305MI-1 2305MI1H 2305MI1H 2305MI1L 2305MI1L 2305I1HL 2305I1HL 2305M-1 2305M-1 2305M-1H 2305M-1H 2305M1LF 2305M1LF 2305M1HL 2305M1HL
Shipping Packaging
Tubes Tape and Reel Tubes Tape and Reel Tubes Tape and Reel Tubes Tape and Reel Tubes Tape and Reel Tubes Tape and Reel Tubes Tape and Reel Tubes Tape and Reel
Package
8-pin SOIC 8-pin SOIC 8-pin SOIC 8-pin SOIC 8-pin SOIC 8-pin SOIC 8-pin SOIC 8-pin SOIC 8-pin SOIC 8-pin SOIC 8-pin SOIC 8-pin SOIC 8-pin SOIC 8-pin SOIC 8-pin SOIC 8-pin SOIC
Temperature
-40 to +85 C -40 to +85 C -40 to +85 C -40 to +85 C -40 to +85 C -40 to +85 C -40 to +85 C -40 to +85 C 0 to +70 C 0 to +70 C 0 to +70 C 0 to +70 C 0 to +70 C 0 to +70 C 0 to +70 C 0 to +70 C
"LF" denotes Pb (lead free) package. While the information presented herein has been checked for both accuracy and reliability, Integrated Circuit Systems (ICS) 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 ICS. ICS reserves the right to change any circuitry or specifications without notice. ICS does not authorize or warrant any ICS product for use in life support devices or critical medical instruments.
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5 25 Race St ree t, San Jose, CA 951 26
Revision 022505 te l (40 8) 2 97-12 01
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ICS2305 3.3 VOLT ZERO DELAY, LOW SKEW BUFFER Revision History
Rev.
A B
Originator
P. Griffith P. Griffith
Date
12/01/04 12/27/04
Description of Change
New device/datasheet; Preliminary. Made corrections to IDD, IDDP, input capacitance, duty cycle and jitter specs/test conditions. Removed reference to table 2 in output clock frequency test conditions. Removed abslolute and cycle-to-cycle jitter specs for 15 pF load. Added duty cycle spec for Fout=50 MHz. Release from Preliminary to Final. Made corrections to test conditions of output rise time, fall-time, duty cycle and cycle-to-cycle jitter. Added LF packing info.
C D
P. Griffith J. Sarma
1/25/05 2/25/05
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Revision 022505 te l (40 8) 2 97-12 01
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