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PRELIMINARY
Integrated Circuit Systems, Inc.
ICS840001-32
FEMTOCLOCKSTM CRYSTAL-TOLVCMOS/LVTTL FREQUENCY SYNTHESIZER
FEATURES
* One LVCMOS/LVTTL output, 15 typical output impedence and one reference clock output * 40MHz, 10pF parallel resonant crystal * Output frequencies: 100MHz or 106.25MHz * RMS phase jitter @ 106.25MHz, using a 40MHz crystal (637kHz - 5MHz): 0.78ps (typical) * 3.3V operating supply * 0C to 70C ambient operating temperature * Availabe in both standard and lead-free RoHS-compliant packages
GENERAL DESCRIPTION
The ICS840001-32 is a two output LVCMOS/ LVTTL Synthesizer and is a member of the HiPerClockSTM HiPerClocks TM family of high perfor mance devices from ICS. The device uses a 40MHz crystal to provide a 40MHz reference clock output and to synthesize a 100MHz or 106.25MHz output. The ICS840001-32 has excellent <1ps phase jitter performance over the 637kHz - 5MHz integration range. The ICS840001-32 is packaged in a 3mm x 3mm 16-pin VFQFN, making it ideal for use on space constrained boards.
IC S
FUNCTION TABLE
Inputs Crystal Frequency (MHz) 40 40 SEL Input 0 1 Outputs Q Output REF_OUT Frequency (MHz) Frequency (MHz) 100 40 106.25 40
BLOCK DIAGRAM
40MHz
PIN ASSIGNMENT
VDDA GND nc nc
REF_OUT VDD 1 XTAL_OUT 2 XTAL_IN
16 15 14 13 12 11 10 9 5
GND
Q VDDO_Q VDD REF_OUT
OSC
XTAL_OUT SEL (Pullup)
Synthesizer
100MHz or 106.25MHz
XTAL_IN 3 SEL 4 6
nc
Q
7
VDDO_REF_OUT
8
GND
ICS840001-32
16-Lead VFQFN 3mm x 3mm x 0.95 package body K Package Top View
The Preliminary Information presented herein represents a product in prototyping or pre-production. The noted characteristics are based on initial product characterization. Integrated Circuit Systems, Incorporated (ICS) reserves the right to change any circuitry or specifications without notice. 840001CK-32 www.icst.com/products/hiperclocks.html REV. A NOVEMBER 23, 2005
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PRELIMINARY
Integrated Circuit Systems, Inc.
ICS840001-32
FEMTOCLOCKSTM CRYSTAL-TOLVCMOS/LVTTL FREQUENCY SYNTHESIZER
Type Power Input Input Power Pullup Description Core supply pin. Crystal oscillator interface. XTAL_IN is the input. XTAL_OUT is the output. Select input. LVCMOS/LVTTL interface levels. Power supply ground. No connect. Output supply pin for REF_OUT output Single-ended three-state reference clock output. LVCMOS/LVTTL interface levels. 15 typical output impedance. Output supply pin for Q output. Single-ended clock output. LVCMOS/LVTTL interface levels. 15 typical output impedance. Analog supply pin.
TABLE 1. PIN DESCRIPTIONS
Number 1, 10 2, 3 4 5, 8, 13 6, 14, 15 7 9 11 12 16 Name VDD XTAL_OUT, XTAL_IN SEL GND nc VDDO_REF_OUT REF_OUT VDDO_Q Q VDDA
Unused Power Output Power Output Power
NOTE: Pullup refers to internal input resistors. See Table 2, Pin Characteristics, for typical values.
TABLE 2. PIN CHARACTERISTICS
Symbol CIN CPD RPULLUP ROUT Parameter Input Capacitance Power Dissipation Capacitance Input Pullup Resistor Output Impedance VDD, VDDA, VDDO_REF_OUT, VDDO_Q = 3.465V Test Conditions Minimum Typical 4 8 51 15 Maximum Units pF pF k
840001CK-32
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REV. A NOVEMBER 23, 2005
PRELIMINARY
Integrated Circuit Systems, Inc.
ICS840001-32
FEMTOCLOCKSTM CRYSTAL-TOLVCMOS/LVTTL FREQUENCY SYNTHESIZER
4.6V -0.5V to VDD + 0.5 V -0.5V to VDDO + 0.5V 51.5C/W (0 lfpm) -65C to 150C 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.
ABSOLUTE MAXIMUM RATINGS
Supply Voltage, VDD Inputs, VI Outputs, VO Package Thermal Impedance, JA Storage Temperature, TSTG
TABLE 3A. POWER SUPPLY DC CHARACTERISTICS, VDD = VDDA = VDDO_REF_OUT = VDDO_Q = 3.3V5%, TA = 0C TO 70C
Symbol VDD VDDA VDDO IDD IDDA IDDO Parameter Core Supply Voltage Analog Supply Voltage Output Supply Voltage Power Supply Current Analog Supply Current Output Supply Current Test Conditions Minimum 3.135 3.135 3.135 Typical 3.3 3.3 3.3 70 25 12 Maximum 3.465 3.465 3.465 Units V V V mA mA mA
TABLE 3B. LVCMOS/LVTTL DC CHARACTERISTICS, VDD = VDDA = VDDO_REF_OUT = VDDO_Q = 3.3V5%, TA = 0C TO 70C
Symbol VIH VIL IIH IIL VOH Parameter Input High Voltage Input Low Voltage Input High Current Input Low Current Output High Voltage; NOTE 1 VDD = VIN = 3.465V VDD = 3.465V, VIN = 0V -150 2.6 0.5 Test Conditions Minimum 2 -0.3 Typical Maximum VDD + 0.3 0.8 5 Units V V A A V V
Output Low Voltage; NOTE 1 VOL NOTE 1: Outputs terminated with 50 to VDDO_x/2 See Parameter Measurement Information Section, "3.3V Output Load Test Circuit".
TABLE 4. CRYSTAL CHARACTERISTICS
Parameter Mode of Oscillation Frequency Equivalent Series Resistance (ESR) Shunt Capacitance Drive Level 10 Test Conditions Minimum Typical Fundamental 40 50 7 100 MHz pF W Maximum Units
840001CK-32
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3
REV. A NOVEMBER 23, 2005
PRELIMINARY
Integrated Circuit Systems, Inc.
ICS840001-32
FEMTOCLOCKSTM CRYSTAL-TOLVCMOS/LVTTL FREQUENCY SYNTHESIZER
Test Conditions REF_OUT Q f_SEL = 0 f_SEL = 1 100MHz, Integration Range: 637kHz to 5MHz 106.25MHz, Integration Range: 637kHz to 5MHz 20% to 80% Minimum Typical 100 106.25 0.83 0.78 90 0 50 Maximum Units MHz MHz ps ps ps %
TABLE 5. AC CHARACTERISTICS, VDD = VDDA = VDDO_REF_OUT = VDDO_Q = 3.3V5%, TA = 0C TO 70C
Symbol Parameter fOUT Output Frequency
t jit(O) t R / tF
RMS Phase Jitter (Random) Output Rise/Fall Time
odc Output Duty Cycle All parameters are characterized @ 100MHz and 106.25MHz.
840001CK-32
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4
REV. A NOVEMBER 23, 2005
PRELIMINARY
Integrated Circuit Systems, Inc.
ICS840001-32
FEMTOCLOCKSTM CRYSTAL-TOLVCMOS/LVTTL FREQUENCY SYNTHESIZER
TYPICAL PHASE NOISE
AT
106.25MHZ
0 -10 -20 -30 -40 -50
Fibre Channel Filter
106.25MHz Raw Phase Noise Data
RMS Phase Jitter (Random) 637kHz to 5MHz = 0.78ps (typical)
NOISE POWER dBc Hz
-60 -70 -80 -90 -100 -110 -120 -130 -140 -150 -160 -170 -180 -190 -200 10 100 1k
Phase Noise Result by adding Fibre Channel Filter to raw data
10k 100k 1M
840001CK-32
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5
OFFSET FREQUENCY (HZ)
REV. A NOVEMBER 23, 2005
PRELIMINARY
Integrated Circuit Systems, Inc.
ICS840001-32
FEMTOCLOCKSTM CRYSTAL-TOLVCMOS/LVTTL FREQUENCY SYNTHESIZER
PARAMETER MEASUREMENT INFORMATION
1.65V 5%
Phase Noise Plot
VDD, VDDA, VDDO_X
SCOPE
Qx
Noise Power
Phase Noise Mask
LVCMOS
GND
f1
Offset Frequency
f2
-1.65V 5%
RMS Jitter = Area Under the Masked Phase Noise Plot
3.3V OUTPUT LOAD AC TEST CIRCUIT
RMS PHASE JITTER
V
DDOX
Q t PW
t
2
80% 20% tR
80% 20% tF
PERIOD
Clock Outputs
x 100%
odc =
t PW t PERIOD
OUTPUT DUTY CYCLE/PULSE WIDTH/PERIOD
OUTPUT RISE/FALL TIME
840001CK-32
www.icst.com/products/hiperclocks.html
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REV. A NOVEMBER 23, 2005
PRELIMINARY
Integrated Circuit Systems, Inc.
ICS840001-32
FEMTOCLOCKSTM CRYSTAL-TOLVCMOS/LVTTL FREQUENCY SYNTHESIZER APPLICATION INFORMATION
POWER SUPPLY FILTERING TECHNIQUES
As in any high speed analog circuitry, the power supply pins are vulnerable to random noise. The ICS840001-32 provides separate power supplies to isolate any high switching noise from the outputs to the internal PLL. VDD, VDDA and VDDO_X should be individually connected to the power supply plane through vias, and bypass capacitors should be used for each pin. To achieve optimum jitter performance, power supply isolation is required. Figure 1 illustrates how a 10 resistor along with a 10F and a .01F bypass capacitor should be connected to each VDDA pin. The 10 resistor can also be replaced by a ferrite bead.
3.3V VDD .01F 10
V DDA .01F 10F
FIGURE 1. POWER SUPPLY FILTERING
CRYSTAL INPUT INTERFACE
The ICS840001-32 has been characterized with 10pF parallel resonant crystals. The capacitor values, C1 and C2, shown in Figure 2 below were determined using a 40MHz, 10pF parallel resonant crystal and were chosen to minimize the ppm error. The optimum C1 and C2 values can be slightly adjusted for different board layouts.
XTAL_IN C1 X1 Crystal XTAL_OUT C2
Figure 2. CRYSTAL INPUt INTERFACE
840001CK-32
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REV. A NOVEMBER 23, 2005
PRELIMINARY
Integrated Circuit Systems, Inc.
ICS840001-32
FEMTOCLOCKSTM CRYSTAL-TOLVCMOS/LVTTL FREQUENCY SYNTHESIZER RELIABILITY INFORMATION
TABLE 7.
JAVS. AIR FLOW TABLE FOR 16 LEAD VFQFN
JA vs. 0 Air Flow (Linear Feet per Minute)
0
Multi-Layer PCB, JEDEC Standard Test Boards
51.5C/W
TRANSISTOR COUNT
The transistor count for ICS840001-32 is: 2121
840001CK-32
www.icst.com/products/hiperclocks.html
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REV. A NOVEMBER 23, 2005
PRELIMINARY
Integrated Circuit Systems, Inc.
ICS840001-32
FEMTOCLOCKSTM CRYSTAL-TOLVCMOS/LVTTL FREQUENCY SYNTHESIZER
16 LEAD VFQFN
PACKAGE OUTLINE - K SUFFIX
FOR
TABLE 8. PACKAGE DIMENSIONS
JEDEC VARIATION ALL DIMENSIONS IN MILLIMETERS SYMBOL N A A1 A3 b e ND NE D D2 E E2 L 0.25 0.30 0.25 3.0 1.25 0.50 0.18 0.50 BASIC 4 4 3.0 1.25 0.80 0 0.25 Reference 0.30 MINIMUM 16 1.0 0.05 MAXIMUM
Reference Document: JEDEC Publication 95, MO-220
840001CK-32
www.icst.com/products/hiperclocks.html
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REV. A NOVEMBER 23, 2005
PRELIMINARY
Integrated Circuit Systems, Inc.
ICS840001-32
FEMTOCLOCKSTM CRYSTAL-TOLVCMOS/LVTTL FREQUENCY SYNTHESIZER
Marking 1C32 1C32 TB D TBD Package 16 Lead VFQFN 16 Lead VFQFN 16 Lead "Lead-Free" VFQFN 16 Lead "Lead-Free" VFQFN Shipping Packaging tray 2500 tape & reel tray 2500 tape & reel Temperature 0C to 70C 0C to 70C 0C to 70C 0C to 70C
TABLE 9. ORDERING INFORMATION
Part/Order Number ICS840001CK-32 ICS840001CK-32T ICS840001CK-32LF ICS840001CK-32LFT
NOTE: Par ts that are ordered with an "LF" suffix to the par t number are the Pb-Free configuration and are RoHS complaint.
The aforementioned trademarks, HiPerClockS and FemtoClocks are trademarks of Integrated Circuit Systems, Inc. or its subsidiaries in the United States and/or other countries. While the information presented herein has been checked for both accuracy and reliability, Integrated Circuit Systems, Incorporated (ICS) assumes no responsibility for either its use or for 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. 840001CK-32
www.icst.com/products/hiperclocks.html
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REV. A NOVEMBER 23, 2005

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