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ICS552-01
Oscillator, Multiplier, and Buffer with 8 Outputs
Description
The ICS552-01 produces 8 low-skew copies of the multiple input clock or fundamental, parallel-mode crystal. Unlike other clock drivers, these parts do not require a separate oscillator for the input. Using ICS' patented Phase-Locked Loop (PLL) to multiply the input frequency, it is ideal for generating and distributing multiple high-frequency clocks. This is a single chip used for 3 different applications: 1) ICS552-01 (A mode) -- an Oscillator mutilpier 2) ICS552-01 (B mode) -- a Dual 1:4 buffer 3) ICS552-01 (C mode) -- a 1:8 Oscillator buffer
ICS552-01 (for B mode)
* Up to 200 MHz clock input/output at 3.3 V * Low skew of 250 ps maximum for any bank of four * Inputs can be connected together for a 1 to 8 buffer
with 250 ps skew between any outputs
* * * *
Non-inverting buffer mode Ideal for clock networks Output Enable mode tri-states outputs Full CMOS output swing with 25 mA output drive capability at TTL levels
* Advanced, low power, sub-micron CMOSprocess
ICS552-01 (for C mode)
Features (all)
* * * *
Packaged as 20-pin SSOP (QSOP) Pb-free packaging available Operating voltages of 3.0 V to 5.5 V Industrial temperature available
* Use with 25 MHz crystal for networking * Use with 27 MHz crystal for MPEG
ICS552-01 (for A and C modes)
Features (specific)
ICS552-01 (for A mode)
* Input frequency of 10.0 to 27.0 MHz * Provides 8 low-skew outputs (<250 ps) * Output clock duty cycle of 40/60 at 3.3 V
* Contains on-chip multiplier with selections of x1,
x1.33, x2, x2.66, x3, x3.33, x4, x4.66, x5, and x6
* Power-down and Tri-state modes
Block Diagram (ICS552-01--A mode)
VDD S3:S0 4 CLK1 CLK2 CLK3 PLL Multiplier CLK4 CLK5 CLK6 Crystal Buffer/ Crystal Oscillator GND CLK7 CLK8
10.0 to 27.0 MHz crystal or clock input X1
X2
External capacitors are required with a crystal input.
MDS 552-01 C Integrated Circuit Systems, Inc.
1
525 Race Street, San Jose, CA 95126
Revision 100104 tel (408) 297-1201
www.icst.com
ICS552-01 Oscillator, Multiplier, and Buffer with 8 Outputs
Pin Assignment (ICS552-01--A mode)
DC X2 X1/ICLK VDD S2 GND CLK1 CLK2 CLK3 CLK4 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 S0 DC CLK8 CLK7 VDD S3 GND CLK6 CLK5 S1
Multiplier Select Table S3
0 0 0 0 0 0 0 0 1 1 1 1
S2
0 0 0 0 1 1 1 1 0 0 0 1
S1
0 0 1 1 0 0 1 1 0 0 1 0
S0
0 1 0 1 0 1 0 1 0 1 0 1
Multiplier
Power Down x1 x1.333 x2 x2.666 x3 x3.333 x4 x5 x4.66 x6 Tri-state all
20-pin (150 mil) SSOP (QSOP)
Pin Descriptions (ICS552-01--A mode)
Pin Number
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Pin Name
DC X2 X1/ICLK VDD S2 GND CLK1 CLK2 CLK3 CLK4 S1 CLK5 CLK6 GND S3 VDD CLK7 CLK8 DC S0
Pin Type
-- XO XI Power Input Power Output Output Output Output Input Output Output Power Input Power Output Output -- Input Do not connect.
Pin Description
Crystal connection. Connect to a 10 - 27 MHz fundamental mode crystal. Crystal connection. Connect to a 10 - 27 MHz fundamental mode crystal or clock. Connect to +3.3 V or 5 V. Decouple with pin 6. Must be same as other VDDs. Multiplier Select pin 2 per table above. Connect to ground. Output clock 1. Output clock 2. Output clock 3. Output clock 4. Multiplier Select pin 1 per table above Output clock 5. Output clock 6. Connect to ground. Multiplier Select pin 3 per table above Connect to +3.3 V or 5 V. Decouple with pin 14. Must be same as other VDDs. Output clock 7. Output clock 8. Do not connect. Multiplier Select pin 0 per table above
MDS 552-01 C Integrated Circuit Systems, Inc.
2
525 Race Street, San Jose, CA 95126
Revision 100104 tel (408) 297-1201
www.icst.com
ICS552-01 Oscillator, Multiplier, and Buffer with 8 Outputs
Block Diagram (ICS552-01--B mode)
INA
QA1 QA2 QA3
S1 S0
Control Logic
QA4 QB1 QB2 QB3
INB
QB4
Pin Assignment (ICS552-01--B mode)
INA DC DC VDD VDD GND QA1 QA2 QA3 QA4 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 S0 INB QB4 QB3 VDD VDD GND QB2 QB1 S1
20-pin (150 mil) SSOP (QSOP)
Clock Output Select Table (ICS552-01--B mode)
S1 S0
0 0 1 1 0 1 0 1
Mode
QA1:4 and QB1:4 running Test mode OE. All outputs in high impedance QA1:4 only. QB1:4 stopped low
MDS 552-01 C Integrated Circuit Systems, Inc.
3
525 Race Street, San Jose, CA 95126
Revision 100104 tel (408) 297-1201
www.icst.com
ICS552-01 Oscillator, Multiplier, and Buffer with 8 Outputs
Pin Descriptions (ICS552-01--B mode)
Pin Number
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Pin Name
INA DC DC VDD VDD GND QA1 QA2 QA3 QA4 S1 QB1 QB2 GND VDD VDD QB3 QB4 INB S0
Pin Type
CI -- -- Power Power Power Output Output Output Output I Output Output Power Power Power Output Output CI I Do not connect. Do not connect.
Pin Description
Input to buffer A. Outputs QA1:4 will be the same frequency. Internal pull-up resistor.
Connect to +3.3 V or 5.0 V. Must be same as other VDDs. Connect to +3.3 V or 5.0 V. Must be same as other VDDs. Connect to ground. Output 1 from buffer A. Output 2 from buffer A. Output 3 from buffer A. Output 4 from buffer A. Mode Select pin 1. Selects mode for outputs. Must be at GND for all clocks on. Internal pull-up resistor. Output 1 from buffer B. Output 2 from buffer B. Connect to ground. Connect to +3.3 V or 5.0 V. Must be same as other VDDs. Connect to +3.3 V or 5.0 V. Must be same as other VDDs. Output 3 from buffer B. Output 4 from buffer B. Input to buffer B. Outputs QA1:4 will be the same frequency. Internal pull-up resistor. Mode Select pin 0. Selects mode for outputs. Must be at GND for all clocks on. Internal pull-up resistor.
KEY: CI = clock input with pull-up resistor; I = input with internal pull-up resistor.
MDS 552-01 C Integrated Circuit Systems, Inc.
4
525 Race Street, San Jose, CA 95126
Revision 100104 tel (408) 297-1201
www.icst.com
ICS552-01 Oscillator, Multiplier, and Buffer with 8 Outputs
Block Diagram (ICS552-01--C mode)
VDD 5 CLK1 CLK2 CLK3 CLK4 10.0 to 27.0 MHz crystal input X1 Crystal Oscillator X2 External capacitors are required with a crystal input. GND 3 CLK5 CLK6 CLK7 CLK8
Pin Assignment (ICS552-01--C mode)
DC X2 X1 VDD GND GND CLK1 CLK2 CLK3 CLK4 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 VDD DC CLK8 CLK7 VDD VDD GND CLK6 CLK5 VDD
20-pin (150 mil) SSOP (QSOP)
MDS 552-01 C Integrated Circuit Systems, Inc.
5
525 Race Street, San Jose, CA 95126
Revision 100104 tel (408) 297-1201
www.icst.com
ICS552-01 Oscillator, Multiplier, and Buffer with 8 Outputs
Pin Descriptions (ICS552-01--C mode)
Pin Number
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Pin Name
DC X2 X1 VDD GND GND CLK1 CLK2 CLK3 CLK4 VDD CLK5 CLK6 GND VDD VDD CLK7 CLK8 DC VDD
Pin Type
-- XO XI Power Power Power Output Output Output Output Power Output Output Power Power Power Output Output -- Power Do not connect.
Pin Description
Crystal connection. Connect to a 10 - 27 MHz fundamental mode crystal. Crystal connection. Connect to a 10 - 27 MHz fundamental mode crystal. Connect to +3.3 V or 5 V. Decouple with pin 6. Must be same as other VDDs. Connect to ground. Connect to ground. Output clock 1. Output clock 2. Output clock 3. Output clock 4. Connect to +3.3 V or 5 V. Must be same as other VDDs. Output clock 5. Output clock 6. Connect to ground. Connect to +3.3 V or 5 V. Must be same as other VDDs. Connect to +3.3 V or 5 V. Decouple with pin 14. Must be same as other VDDs. Output clock 7. Output clock 8. Do not connect. Connect to +3.3 V or 5 V. Must be same as other VDDs.
MDS 552-01 C Integrated Circuit Systems, Inc.
6
525 Race Street, San Jose, CA 95126
Revision 100104 tel (408) 297-1201
www.icst.com
ICS552-01 Oscillator, Multiplier, and Buffer with 8 Outputs
External Components
Series Termination Resistor
Clock output traces over one inch should use series termination. To series terminate a 50 trace (a commonly used trace impedance), place a 33 resistor in series with the clock line, as close to the clock output pin as possible. The nominal impedance of the clock output is 20.
PCB Layout Recommendations
For optimum device performance and lowest output phase noise, the following guidelines should be observed. 1) Each 0.01F decoupling capacitor should be mounted on the component side of the board as close to the VDD pin as possible. No vias should be used between decoupling capacitor and VDD pin. The PCB trace to VDD pin should be kept as short as possible, as should the PCB trace to the ground via. 2) The external crystal should be mounted just next to the device with short traces. The X1 and X2 traces should not be routed next to each other with minimum spaces, instead they should be separated and away from other traces. 3) To minimize EMI, the 33 series termination resistor (if needed) should be placed close to the clock output. 4) An optimum layout is one with all components on the same side of the board, minimizing vias through other signal layers.
Decoupling Capacitors
As with any high-performance mixed-signal IC, the ICS552-01 must be isolated from system power supply noise to perform optimally. Decoupling capacitors of 0.01F must be connected between each VDD and GND on pins 4 and 6, and 16 and 14. Other VDDs and GNDs can be connected to these pins or directly to their respective ground planes.
Crystal Load Capacitors
The device crystal connections should include pads for small capacitors from X1 to ground and from X2 to ground. These capacitors are used to adjust the stray capacitance of the board to match the nominally required crystal load capacitance. Because load capacitance can only be increased in this trimming process, it is important to keep stray capacitance to a minimum by using very short PCB traces (and no vias) been the crystal and device. Crystal capacitors must be connected from each of the pins X1 and X2 to ground. The value (in pF) of these crystal caps should equal (CL -12 pF)*2. In this equation, CL= crystal load capacitance in pF. Example: For a crystal with a 18 pF load capacitance, two 12 pF capacitors should be used. For a clock input, connect it X1/ICLK and leave X2 unconnected (floating).
MDS 552-01 C Integrated Circuit Systems, Inc.
7
525 Race Street, San Jose, CA 95126
Revision 100104 tel (408) 297-1201
www.icst.com
ICS552-01 Oscillator, Multiplier, and Buffer with 8 Outputs
Absolute Maximum Ratings
Stresses above the ratings listed below can cause permanent damage to the ICS552-01. 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.
Parameter
Supply Voltage, VDD Inputs Clock Outputs Storage Temperature Soldering Temperature Junction Temperature
Condition
Referenced to GND Referenced to GND Referenced to GND Max 10 seconds
Min.
-0.5 -0.5 -65
Typ.
Max.
7 VDD+0.5 VDD+0.5 150 260 125
Units
V V V C C C
Recommended Operation Conditions
Parameter
Ambient Operating Temperature (commercial) Ambient Operating Temperature (industrial)
Min.
0 -40
Typ.
Max.
+70 +85
Units
C C
DC Electrical Characteristics
Unless stated otherwise, VDD = 3.3 V or 5 V, Ambient Temperature -40 to +85C
Parameter
Operating Voltage Input High Voltage Input Low Voltage Input High Voltage Input Low Voltage Output High Voltage Output Low Voltage Output High Voltage Short Circuit Current
Symbol
VDD VIH VIL VIH VIL VOH VOL VOH IOS ICLK ICLK
Conditions
Min.
3.0 VDD/2+1 2
Typ.
VDD/2 VDD/2
Max.
5.5 VDD/2-1 0.8
Units
V V V V V V
S3:S0 S3:S0 VDD = 3.3 V, IOH = -8 mA VDD = 3.3 V, IOL = 8 mA VDD = 3.3 V or 5 V, IOH = -8 mA VDD = 3.3 V, each output
2.4 0.4 VDD-0.4 50
V V mA
MDS 552-01 C Integrated Circuit Systems, Inc.
8
525 Race Street, San Jose, CA 95126
Revision 100104 tel (408) 297-1201
www.icst.com
ICS552-01 Oscillator, Multiplier, and Buffer with 8 Outputs
Parameter
Operating Supply Current Operating Supply Current Power-down Supply Current
Symbol
IDD IDD IDD
Conditions
at 3.3 V, no load, 25 MHz in, x4 at 5 V, no load, 25 MHz in, x4 S3:S0 = 0 (GND)
Min.
Typ.
35 59 55
Max.
Units
mA mA A
AC Electrical Characteristics
Unless stated otherwise, VDD = 3.3 V or 5 V, Ambient Temperature -40 to +85 C
Parameter
Input Frequency Output Rise Time Output Fall Time Duty Cycle Output-to-Output Skew
Symbol
FIN tOR tOF
Conditions
Fundamental crystal Input clock 0.8 to 2.0 V 2.0 to 0.8 V at VDD/2 Rising edges at VDD/2
Min.
10 10
Typ.
Max. Units
27 27 1.5 1.5 MHz MHz ns ns % ps
40
50
60 250
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.
135 93 78 60
Max. Units
C/W C/W C/W C/W
Thermal Resistance Junction to Case
MDS 552-01 C Integrated Circuit Systems, Inc.
9
525 Race Street, San Jose, CA 95126
Revision 100104 tel (408) 297-1201
www.icst.com
ICS552-01 Oscillator, Multiplier, and Buffer with 8 Outputs
Package Outline and Package Dimensions (20-pin SSOP, 150 Mil. Wide Body)
Package dimensions are kept current with JEDEC Publication No. 95
Millimeters
20
Inches Min Max
Symbol
Min
Max
E1 INDEX AREA
E
12 D
A A1 A2 b c D E E1 e L aaa
1.35 1.75 0.10 0.25 -1.50 0.20 0.30 0.18 0.25 8.55 8.75 5.80 6.20 3.80 4.00 .635 Basic 0.40 1.27 0 8 -0.10
0.053 0.069 0.004 0.010 -0.059 0.008 0.012 0.007 0.010 0.337 0.344 0.228 0.244 0.150 0.157 .025 Basic 0.016 0.050 0 8 -0.004
A2 A1
A
c
-Ce
b SEATING PLANE L
aaa C
Ordering Information
Part / Order Number
ICS552R-01 ICS552R-01T ICS552R-01LN ICS552R-01LNT ICS552R-01I ICS552R-01IT
Marking
ICS552R-01 ICS552R-01 552R-01LN 552R-01LN ICS552R-01I ICS552R-01I
Shipping Packaging
Tubes Tape and Reel Tubes Tape and Reel Tubes Tape and Reel
Package
20-pin SSOP 20-pin SSOP 20-pin SSOP 20-pin SSOP 20-pin SSOP 20-pin SSOP
Temperature
0 to +70C 0 to +70C 0 to +70C 0 to +70C -40 to +85C -40 to +85C
"LN" 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.
MDS 552-01 C Integrated Circuit Systems, Inc.
10
525 Race Street, San Jose, CA 95126
Revision 100104 tel (408) 297-1201
www.icst.com

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