FEMTOCLOCKSCRYSTAL-TO-3.3V LVPECL/LVCMOS FREQUENCY SYNTHESIZER FE

The Datasheet Archive - 100 Million Datasheets from 7500 Manufacturers.

FEMTOCLOCKSCRYSTAL-TO-3.3V LVPECL/LVCMOS FREQUENCY SYNTHESIZER FE

Datasheet Thumbnail

Top Searches for this datasheet

ICS843001I-23
FEMTOCLOCKSCRYSTAL-TO-3.3V LVPECL/LVCMOS FREQUENCY SYNTHESIZER
FEATURES
3.3V LVPECL output pair LVCMOS/LVTTL REF_OUT output Selectable crystal oscillator interfaces LVCMOS/LVTTL single-ended input Crystal range: 17.5MHz 29.54MHz Able generate GbE/10GbE/12GbE, Fibre Channel (1Gb/4Gb/10Gb), PCI-E SATA from 25MHz crystal range: 1.12GHz 1.3GHz Supports following applications: SONET, Ethernet, Fibre Channel, Serial ATA, HDTV phase jitter 622.08MHz (12kHz 20MHz): <1ps (typical) design target Supply modes: VCC/VCCO 3.3V/3.3V 3.3V/2.5V 2.5V/2.5V -40°C 85°C ambient operating temperature Available both standard lead-free RoHS-compliant packages
GENERAL DESCRIPTION
ICS843001I-23 highly versatile, phase noise LVPECL/LVCMOS Synthesizer HiPerClockSwhich generate jitter reference clocks variety communication applications member HiPerClocksfamily high performance clock solutions from ICS. dual crystal interface allows synthesizer support three communication standards given application (i.e. SONET with 19.44MHz crystal, 1Gb/10Gb Ethernet Fibre Channel using 25MHz crystal). phase jitter performance typically less than 1ps, thus making device acceptable demanding applications such OC48 SONET, GbE/10Gb Ethernet applications. ICS843001I-23 packaged small 24-pin TSSOP package.
BLOCK DIAGRAM
N2:N0 SEL0
Pulldown
ASSIGNMENT
SEL1 Pulldown XTAL_IN0 (default)
XTAL_OUT0 XTAL_IN1
XTAL_OUT1
Pulldown
Phase Detector
VCCO_LVCMOS VCCO_LVPECL VCCA XTAL_OUT1 XTAL_IN1
REF_OUT OE_REF SEL1 SEL0 XTAL_IN0 XTAL_OUT0
(default)
ICS843001I-23
24-Lead TSSOP 4.40mm 7.8mm 0.92mm package body Package View
Pulldown M2:M0 Pullup
REF_OUT OE_REF Pulldown
Preliminary Information presented herein represents product prototyping pre-production. noted characteristics based initial product characterization. Integrated Circuit Systems, Incorporated (ICS) reserves right change circuitry specifications without notice.
843001AGI-23
REV. JANUARY 2006
ICS843001I-23
FEMTOCLOCKSCRYSTAL-TO-3.3V LVPECL/LVCMOS FREQUENCY SYNTHESIZER
Type Description Output supply LVCMOS/LVTTL REF_OUT output. Pulldown Output divider select pins. Table LVCMOS/LVTTL interface levels. Pullup Output supply LVPECL output. Differential output pair. LVPECL interface levels. Negative supply pin. Analog supply pin. Core supply pin. Parallel resonant ystal interface. XTAL_OUT1 output, XTAL_IN1 input. Parallel resonant ystal interface. XTAL_OUT0 output, XTAL_IN0 input. Pulldown LVCMOS/LVTTL clock input. Pulldown Input select pins. LVCMOS/LVTTL interface levels. Active HIGH Master Reset. When logic HIGH, internal dividers reset causing true output inver output Pulldown high. When logic LOW, internal dividers outputs enabled. LVCMOS/LVTTL interface levels. Feedback divider select pins. Table Pullup LVCMOS/LVTTL interface levels. Reference clock output enable. Default Low. Table Pulldown LVCMOS/LVTTL interface levels. Reference clock output. LVCMOS/LVTTL interface levels.
TABLE DESCRIPTIONS
Number Name VCCO_CMOS VCCO_LVPECL VCCA XTAL_OUT1, XTAL_IN1 XTAL_OUT0, XTAL_IN0 SEL0, SEL1 Input Input Power Ouput Power Power Power Input Input Input Input Input Power
OE_REF REF_OUT
Input Input Output
NOTE: Pullup Pulldown refer internal input resistors. Table Characteristics, typical values.
TABLE CHARACTERISTICS
Symbol RPULLDOWN RPULLUP Rout Parameter Input Capacitance Input Pulldown Resistor Input Pullup Resistor Output Impedance REF_OUT Test Conditions Minimum Typical Maximum Units
843001AGI-23
REV. JANUARY 2006
ICS843001I-23
FEMTOCLOCKSCRYSTAL-TO-3.3V LVPECL/LVCMOS FREQUENCY SYNTHESIZER
Output Frequency (MHz) 74.25 74.25 155.52 622.08 311.04 156.25 312.5 187.5 106.25 159.375 212.5
TABLE COMMON CONFIGURATIONS TABLE
Input XTAL Input (MHz) 24.75 19.44 19.44 19.44 Feedback Divider (MHz) 1188 1188 1244.16 1244.16 1244.16 1250 1250 1250 1250 1250 1125 1200 1200 1200 1275 1275 1275 Divider Value Application HDTV HDTV SONET SONET SONET GigE GigE GigE XGMII GigE GigE Express SATA SATA Fibre Channel Fibre Channel Fibre Channel
TABLE PROGRAMMABLE OUTPUT DIVIDER FUNCTION TABLE
Inputs Divider Value
(default)
TABLE PROGRAMMABLE OUTPUT DIVIDER FUNCTION TABLE
Inputs Divide Value (default)
Input Frequency Minimum 25.5 24.9 23.3 22.4 22.0 17.5 Maximum 29.54 28.88 27.08 26.0 25.49 20.31
TABLE BYPASS MODE FUNCTION TABLE
Inputs SEL1 SEL0 Reference Input XTAL0 XTAL1 Mode Active Active Active Bypass
TABLE OE_REF OUTPUT FUNCTION TABLE
Inputs OE_REF Output REF_OUT Hi-Z Active
843001AGI-23
REV. JANUARY 2006
ICS843001I-23
FEMTOCLOCKSCRYSTAL-TO-3.3V LVPECL/LVCMOS FREQUENCY SYNTHESIZER
4.6V -0.5V 0.5V 50mA 100mA -0.5V VCCO 0.5V 70°C/W mps) -65°C 150°C NOTE: Stresses beyond those listed under Absolute Maximum Ratings cause permanent damage device. These ratings stress specifications only. Functional operation product these conditions conditions beyond those listed Characteristics Characteristics implied. Exposure absolute maximum rating conditions extended periods affect product reliability.
ABSOLUTE MAXIMUM RATINGS
Supply Voltage, Inputs, Outputs, (LVPECL) Continuous Current Surge Current Outputs, (LVCMOS) Package Thermal Impedance, Storage Temperature, TSTG
TABLE POWER SUPPLY CHARACTERISTICS, VCCA VCCO_LVPECL, VCCO_LVCMOS 3.3V±5%, -40°C 85°C
Symbol VCCA VCCO_LVPECL VCCO_LVCMOS ICCA ICCO_LVPECL ICCO_LVCMOS Parameter Core Supply Voltage Analog Supply Voltage Output Supply Voltage Output Supply Voltage Power Supply Current Analog Supply Current Output Supply Current Output Supply Current OE_REF OE_REF REF_OUT 29.54MHz OE_REF OE_REF REF_OUT 29.54MHz Test Conditions Minimum 3.135 3.135 3.135 3.135 Typical Maximum 3.465 3.465 3.465 3.465 Units
TABLE POWER SUPPLY CHARACTERISTICS, VCCA 3.3V±5%, VCCO_LVPECL, VCCO_LVCMOS 2.5V±5%,
-40°C 85°C
Symbol VCCA VCCO_LVPECL VCCO_LVCMOS ICCA ICCO_LVPECL ICCO_LVCMOS
Parameter Core Supply Voltage Analog Supply Voltage Output Supply Voltage Output Supply Voltage Power Supply Current Analog Supply Current Output Supply Current Output Supply Current
Test Conditions
Minimum 3.135 3.135 2.625 2.625
Typical
Maximum 3.465 3.465 2.625 2.625
Units
OE_REF OE_REF REF_OUT 29.54MHz OE_REF OE_REF REF_OUT 29.54MHz
843001AGI-23
REV. JANUARY 2006
ICS843001I-23
FEMTOCLOCKSCRYSTAL-TO-3.3V LVPECL/LVCMOS FREQUENCY SYNTHESIZER
Test Conditions Minimum 2.625 2.625 2.625 2.625 OE_REF OE_REF REF_OUT 29.54MHz OE_REF OE_REF REF_OUT 29.54MHz Typical Maximum 2.625 2.625 2.625 2.625 Units
TABLE POWER SUPPLY CHARACTERISTICS, VCCA VCCO_LVPECL, VCCO_LVCMOS 2.5V±5%, -40°C 85°C
Symbol VCCA VCCO_LVPECL VCCO_LVCMOS ICCA ICCO_LVPECL ICCO_LVCMOS Parameter Core Supply Voltage Analog Supply Voltage Output Supply Voltage Output Supply Voltage Power Supply Current Analog Supply Current Output Supply Current Output Supply Current
TABLE LVCMOS LVTTL CHARACTERISTICS, VCCA VCCO_LVCMOS 3.3V±5% 2.5V±5%,
VCCA 3.3V±5%, VCCO_LVCMOS 2.5V±5%, -40°C 85°C
Symbol Parameter Input High Voltage Input Voltage CLK, SEL0, SEL1, OE_REF, M0:M2 CLK, SEL0, SEL1, OE_REF, M0:M2 REF_OUT REF_OUT Test Conditions 3.3V 2.5V 3.3V 2.5V 3.465V 2.625V 3.465V 2.625V 3.465V 2.625V, 3.465V 2.625V, VCCO_LVCMOS 3.465V VCCO_LVCMOS 2.625V VCCO_LVCMOS 3.465V Minimum Typical -0.3 -0.3 Maximum -150 Units V/ns
Input High Current
Input Current
Output High Voltage; NOTE Output Voltage; NOTE
2.625V Input Edge Rate NOTE Output terminated with VCCO _LVCMOS/2. Parameter Measurement Information Section, "Output Load Test Circuit Diagram" diagrams.
TABLE LVPECL CHARACTERISTICS, VCCA VCCO_LVPECL 3.3V±5% 2.5V±5%,
VCCA 3.3V±5%, VCCO_LVPECL 2.5V±5%, -40°C 85°C
Symbol VSWING Parameter Output High Voltage; NOTE Output Voltage; NOTE Peak-to-Peak Output Voltage Swing Test Conditions Minimum VCCO_LVPECL VCCO_LVPECL Typical Maximum VCCO_LVPECL VCCO_LVPECL Units
NOTE Outputs terminated with VCCO_LVPECL
843001AGI-23
REV. JANUARY 2006
ICS843001I-23
FEMTOCLOCKSCRYSTAL-TO-3.3V LVPECL/LVCMOS FREQUENCY SYNTHESIZER
Test Conditions Minimum 17.5 Typical Maximum 29.54 Units
TABLE CRYSTAL CHARACTERISTICS
Parameter Mode Oscillation Frequency Equivalent Series Resistance (ESR) Shunt Capacitance Drive Level NOTE: Characterized using 18pF parallel resonant crystal. Fundamental
TABLE CHARACTERISTICS, VCCA VCCO_LVPECL, VCCO_LVCMOS 3.3V±5%, -40°C 85°C
Symbol fOUT fVCO tL_SEL tL_M Parameter Output Frequency Propagation Delay, NOTE REF_OUT Phase Jitter, (Random); NOTE Lock Range Select Time Lock Time Output Rise/Fall Time Q/nQ REF_OUT Test Conditions Minimum 622.08MHz (12kHz 20MHz) 1.12 Typical Maximum Units
Q/nQ Output Duty Cycle REF_OUT NOTE Measured from VCC/2 input VCCO_LVCMOS/2 output. NOTE Phase jitter measured using 19.44MHz quar crystal. NOTE This parameter defined accordance with JEDEC Standard
TABLE CHARACTERISTICS, VCCA 3.3V±5%, VCCO_LVPECL, VCCO_LVCMOS 2.5V±5%,
-40°C 85°C
Symbol fOUT fVCO tL_SEL tL_M
Parameter Output Frequency Propagation Delay, NOTE REF_OUT Phase Jitter, (Random); NOTE Lock Range Select Time Lock Time Output Rise/Fall Time Q/nQ REF_OUT
Test Conditions
Minimum
Typical
Maximum
Units
622.08MHz (12kHz 20MHz) 1.12
Q/nQ Output Duty Cycle REF_OUT NOTE Measured from VCC/2 input VCCO_LVCMOS/2 output. NOTE Phase jitter measured using 19.44MHz quar crystal. NOTE This parameter defined accordance with JEDEC Standard
843001AGI-23
REV. JANUARY 2006
ICS843001I-23
FEMTOCLOCKSCRYSTAL-TO-3.3V LVPECL/LVCMOS FREQUENCY SYNTHESIZER
Test Conditions Minimum 622.08MHz (12kHz 20MHz) 1.12 Q/nQ REF_OUT Typical Maximum Units
TABLE CHARACTERISTICS, VCCA VCCO_LVPECL, VCCO_LVCMOS 2.5V±5%, -40°C 85°C
Symbol fOUT fVCO tL_SEL tL_M Parameter Output Frequency Propagation Delay, NOTE REF_OUT Phase Jitter, (Random); NOTE Lock Range Select Time Lock Time Output Rise/Fall Time
Q/nQ Output Duty Cycle REF_OUT NOTE Measured from VCC/2 input VCCO_LVCMOS/2 output. NOTE Phase jitter measured using 19.44MHz quar crystal. NOTE This parameter defined accordance with JEDEC Standard
843001AGI-23
REV. JANUARY 2006
ICS843001I-23
FEMTOCLOCKSCRYSTAL-TO-3.3V LVPECL/LVCMOS FREQUENCY SYNTHESIZER
PARAMETER MEASUREMENT INFORMATION
1.65±5%
VCCA, VCCO_LVPECL
SCOPE
VCCA, VCCO_LVCMOS
SCOPE
LVPECL
LVCMOS
-1.3V±0.165V
-1.65V±5%
3.3V LVPECL OUTPUT LOAD TEST CIRCUIT
2.8V±0.04V VCCA VCCO_LVPECL
3.3V LVCMOS OUTPUT LOAD TEST CIRCUIT
2.05±5% 1.25±5%
SCOPE
VCCA VCCO_LVCMOS
SCOPE
LVPECL
LVCMOS
VDDO
-0.5V±0.125V
-1.25V±5%
3.3V CORE/2.5V LVPECL OUTPUT LOAD TEST CIRCUIT
3.3V CORE/2.5V LVCMOS OUTPUT LOAD TEST CIRCUIT
1.25±5%
VCCA, VCCO_LVPECL
SCOPE
VCCA, VCCO_LVCMOS
SCOPE
LVPECL
LVCMOS
-0.5V±0.125V
-1.25V±5%
2.5V LVPECL OUTPUT LOAD TEST CIRCUIT
843001AGI-23
2.5V LVCMOS OUTPUT LOAD TEST CIRCUIT
REV. JANUARY 2006
ICS843001I-23
FEMTOCLOCKSCRYSTAL-TO-3.3V LVPECL/LVCMOS FREQUENCY SYNTHESIZER
Phase Noise Plot
Noise Power
Phase Noise Mask
PERIOD
Offset Frequency
PERIOD
100%
Jitter Area Under Masked Phase Noise Plot
PHASE JITTER
LVPECL OUTPUT DUTY CYCLE/PULSE WIDTH/PERIOD
CCO_LVCMOS
REF_OUT
PERIOD
Clock Outputs
PERIOD
100%
LVCMOS OUTPUT DUTY CYCLE/PULSE WIDTH/PERIOD
OUTPUT RISE/FALL TIME
VCCO_LVCMOS
REF_OUT
PROPAGATION DELAY
843001AGI-23
REV. JANUARY 2006
ICS843001I-23
FEMTOCLOCKSCRYSTAL-TO-3.3V LVPECL/LVCMOS FREQUENCY SYNTHESIZER APPLICATION INFORMATION
POWER SUPPLY FILTERING TECHNIQUES
high speed analog circuitry, power supply pins vulnerable random noise. ICS843001I-23 provides separate power supplies isolate high switching noise from outputs internal PLL. VCC, VCCA, VCCO_x should individually connected power supply plane through vias, bypass capacitors should used each pin. achieve optimum jitter performance, power supply isolation required. Figure illustrates resistor along with 10µF .01F bypass capacitor should connected each VCCA.
3.3V 2.5V .01F VCCA .01F
FIGURE POWER SUPPLY FILTERING
RECOMMENDATIONS UNUSED INPUT OUTPUT PINS INPUTS: OUTPUTS:
CRYSTAL INPUT: applications requiring crystal oscillator input, both XTAL_IN XTAL_OUT left floating. Though required, additional protection, resistor tied from XTAL_IN ground. INPUT: applications requiring test clock, left floating. Though required, additional protection, resistor tied from input ground. CONTROL PINS: control pins have internal pull-ups pull-downs; additional resistance required added additional protection. resistor used. LVCMOS OUTPUT: unused LVCMOS output left floating. recommend that there trace attached. LVPECL OUTPUT unused LVPECL outputs left floating. recommend that there trace attached. Both sides differential output pair should either left floating terminated.
843001AGI-23
REV. JANUARY 2006
ICS843001I-23
FEMTOCLOCKSCRYSTAL-TO-3.3V LVPECL/LVCMOS FREQUENCY SYNTHESIZER
Figure below were determined using 18pF parallel resonant crystal were chosen minimize error.
CRYSTAL INPUT INTERFACE
ICS843001I-23 been characterized with 18pF parallel resonant crystals. capacitor values shown
XTAL_IN 18pF Parallel stal XTAL_OUT
ICS843001I-23 ICS84332
Figure CRYSTAL INPUt INTERFACE
TERMINATION 3.3V LVPECL OUTPUT
clock layout topology shown below typical termination LVPECL outputs. different layouts mentioned recommended only guidelines. FOUT nFOUT impedance follower outputs that generate ECL/LVPECL compatible outputs. Therefore, terminating resistors current path ground) current sources must used functionality. These outputs designed drive transmission lines. Matched impedance techniques should used maximize operating frequency minimize signal distortion. Figures show different layouts which recommended only guidelines. Other suitable clock layouts exist would recommended that board designers simulate guarantee compatibility across printed circuit clock component process variations.
3.3V
FOUT
FOUT
((VOH VOL) (VCC
FIGURE LVPECL OUTPUT TERMINATION
843001AGI-23
FIGURE LVPECL OUTPUT TERMINATION
REV. JANUARY 2006
ICS843001I-23
FEMTOCLOCKSCRYSTAL-TO-3.3V LVPECL/LVCMOS FREQUENCY SYNTHESIZER
close ground level. Figure eliminated termination shown Figure
TERMINATION 2.5V LVPECL OUTPUT
Figure Figure show examples termination 2.5V LVPECL driver. These terminations equivalent terminating 2.5V, very
2.5V
2.5V 2.5V VCC=2.5V 2,5V LVPECL Driv 62.5 62.5
VCC=2.5V 2,5V LVPECL Driv
FIGURE 2.5V LVPECL DRIVER TERMINATION EXAMPLE
FIGURE 2.5V LVPECL DRIVER TERMINATION EXAMPLE
2.5V VCC=2.5V 2,5V LVPECL Driv
FIGURE 2.5V LVPECL TERMINATION EXAMPLE
843001AGI-23
REV. JANUARY 2006
ICS843001I-23
FEMTOCLOCKSCRYSTAL-TO-3.3V LVPECL/LVCMOS FREQUENCY SYNTHESIZER RELIABILITY INFORMATION
TABLE
JAVS. FLOW TABLE LEAD TSSOP
Velocity (Meters Second)
65°C/W
62°C/W
Multi-Layer PCB, JEDEC Standard Test Boards
70°C/W
TRANSISTOR COUNT
transistor count ICS843001I-23 4165
843001AGI-23
REV. JANUARY 2006
ICS843001I-23
FEMTOCLOCKSCRYSTAL-TO-3.3V LVPECL/LVCMOS FREQUENCY SYNTHESIZER
LEAD TSSOP
PACKAGE OUTLINE SUFFIX
TABLE PACKAGE DIMENSIONS
SYMBOL 0.45 -4.30 0.65 BASIC 0.75 0.10 -0.05 0.80 0.19 0.09 7.70 6.40 BASIC 4.50 Millimeters Minimum 1.20 0.15 1.05 0.30 0.20 7.90 Maximum
Reference Document: JEDEC Publication MO-153
843001AGI-23
REV. JANUARY 2006
ICS843001I-23
FEMTOCLOCKSCRYSTAL-TO-3.3V LVPECL/LVCMOS FREQUENCY SYNTHESIZER
Marking Package Lead TSSOP Lead TSSOP Lead "Lead-Free" TSSOP Lead "Lead-Free" TSSOP Shipping Packaging tube 2500 tape reel tube 2500 tape reel Temperature -40°C 85°C -40°C 85°C -40°C 85°C -40°C 85°C
TABLE ORDERING INFORMATION
Part/Order Number ICS843001AGI-23 ICS843001AGI-23T ICS843001AGI-23LF ICS843001AGI-23LFT ICS843001AI23 ICS843001AI23
NOTE: that ordered with "LF" suffix number Pb-Free configuration RoHS compliant.
aforementioned trademarks, HiPerClockS FemtoClocks trademarks Integrated Circuit Systems, Inc. subsidiaries United States and/or other countries. While information presented herein been checked both accuracy reliability, Integrated Circuit Systems, Incorporated (ICS) assumes responsibility either infringement patents other rights third parties, which would result from use. other circuits, patents, licenses implied. This product intended normal commercial industrial applications. other applications such those requiring high reliability other extraordinary environmental requirements recommended without additional processing ICS. reserves right change circuitry specifications without notice. does authorize warrant product life support devices critical medical instruments. 843001AGI-23
REV. JANUARY 2006

FEMTOCLOCKSCRYSTAL-TO-3.3V LVPECL/LVCMOS FREQUENCY SYNTHESIZER FE

Top Searches for this datasheet

Other recent searches