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Part: ICS843011AG
Category:
Timing Circuits
-> Clock Generators
Description: Femtoclocks CRYSTAL-TO-<<<>>>3.3V Lvpecl Clock Generator.<<<>>>the ICS843011 is a Fibre Channel Clock Generator<<<>>>and a Member of The Hiperclockstm Family of High<<<>>>performance Devices From Ics. The ICS843011<<<>>>uses a 26.5625MHz Crystal to Synthesize<<<>>>106.25MHz or a 25MHz Crystal to Synthesize<<<>>>100MHz. The ICS843011 Has Excellent Phase Jitter Performance,<<<>>>over The 637KHz 10MHz Integration Range. The ICS843011 Is<<<>>>packaged in a Small 8-pin Tssop, Making it Ideal For Use In<<<>>>systems With Limited Board Space.<<<>>>FEATURES<<<>>> 1 Differential 3.3V Lvpecl Output<<<>>> Crystal Oscillator Interface Designed For 26.5625MHz<<<>>>18pF Parallel Resonant Crystal<<<>>> Output Frequency: 106.25MHz or 100MHz<<<>>> RMS Phase Jitter @ 100MHz, Using a 25MHz Crystal<<<>>>(637KHz - 10MHz): 0.803ps (typical)<<<>>> RMS Phase Noise at 106.25MHz<<<>>>Phase Noise:<<<>>>offset Noise Power<<<>>>100Hz ............... -92.8 DBc/Hz<<<>>>1KHz ..............-119.6 DBc/Hz<<<>>>10KHz ..............-129.5 DBc/Hz<<<>>>100KHz ..............-130.5 Dbc/hz
Company: Integrated Circuit System
Datasheet: Download ICS843011AG datasheet File size : 212 kB
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PRELIMINARY
Integrated Circuit Systems, Inc.
ICS843011
FEMTOCLOCKSTM CRYSTAL-TO3.3V LVPECL CLOCK GENERATOR
FEATURES
· 1 differential 3.3V LVPECL output · Crystal oscillator interface designed for 26.5625MHz 18pF parallel resonant crystal · Output frequency: 106.25MHz or 100MHz · RMS phase jitter @ 100MHz, using a 25MHz crystal (637KHz - 10MHz): 0.803ps (typical) · RMS phase noise at 106.25MHz Phase noise: Offset Noise Power 100Hz ...... -92.8 dBc/Hz 1KHz ..... -119.6 dBc/Hz 10KHz ..... -129.5 dBc/Hz 100KHz ..... -130.5 dBc/Hz · 3.3V operating supply · -30°C to 85°C ambient operating temperature
GENERAL DESCRIPTION
The ICS843011 is a Fibre Channel Clock Generator and a member of the HiPerClocksTM family of high H iPer Cl ockSTM perfor mance devices from ICS. The ICS843011 u s e s a 26.5625MHz crystal to synthesize 106.25MHz or a 25MHz crystal to synthesize 100MHz. The ICS843011 has excellent <1ps phase jitter performance, over the 637KHz 10MHz integration range. The ICS843011 is packaged in a small 8-pin TSSOP, making it ideal for use in systems with limited board space.
ICS
FREQUENCY TABLE
Crystal (MHz) 26.5625 25 Output Frequency (MHz) 106.25 100
BLOCK DIAGRAM
XTAL_IN
PIN ASSIGNMENT
VCO
637.5MHz w/ 26.5625MHz Ref.
OSC
XTAL_OUT
Phase Detector
÷6
nQ0 Q0
VCCA VEE XTAL_OUT XTAL_IN
1 2 3 4
8 7 6 5
VC C Q0 nQ0 nc
M = ÷24 (fixed)
ICS843011
8-Lead TSSOP 4.40mm x 3.0mm x 0.925mm package body G 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. 843011AG www.icst.com/products/hiperclocks.html REV. B MAY 11, 2004
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PRELIMINARY
Integrated Circuit Systems, Inc.
ICS843011
FEMTOCLOCKSTM CRYSTAL-TO3.3V LVPECL CLOCK GENERATOR
Type Power Power Input Description Analog supply pin. Negative supply pin. Crystal oscillator interface. XTAL_IN is the input, XTAL_OUT is the output. No connect. Differential clock outputs. LVPECL interface levels. Core supply pin.
TABLE 1. PIN DESCRIPTIONS
Number 1 2 3, 4 5 6, 7 8 Name VCCA VEE XTAL_OUT, XTAL_IN nc nQ0, Q0 VCC
Unused Output Power
TABLE 2. PIN CHARACTERISTICS
Symbol CIN Parameter Input Capacitance Test Conditions Minimum Typical 4 Maximum Units pF
843011AG
www.icst.com/products/hiperclocks.html
2
REV. B MAY 11, 2004
PRELIMINARY
Integrated Circuit Systems, Inc.
ICS843011
FEMTOCLOCKSTM CRYSTAL-TO3.3V LVPECL CLOCK GENERATOR
4.6V -0.5V to VCC + 0.5V 50mA 100mA 101.7°C/W (0 mps) -65°C to 150°C N OT E : 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, VCC Inputs, VI Outputs, IO Continuous Current Surge Current Package Thermal Impedance, JA Storage Temperature, TSTG
TABLE 3A. POWER SUPPLY DC CHARACTERISTICS, VCC = 3.3V±5%, TA = -30°C TO 85°C
Symbol VCC VCCA IEE Parameter Core Supply Voltage Analog Supply Voltage Power Supply Current Test Conditions Minimum 3.135 3.135 Typical 3.3 3.3 Maximum 3.465 3.465 93 Units V V mA
TABLE 3B. LVPECL DC CHARACTERISTICS, VCC = 3.3V±5%, TA = -30°C TO 85°C
Symbol VOH VOL VSWING Parameter Output High Voltage; NOTE 1 Output Low Voltage; NOTE 1 Peak-to-Peak Output Voltage Swing Test Conditions Minimum VCC - 1.4 VCC - 2.0 0.6 Typical Maximum VCC - 0.9 VCC - 1.7 1.0 Units V V V
NOTE 1: Outputs terminated with 50 to VCC - 2V.
TABLE 4. CRYSTAL CHARACTERISTICS
Parameter Mode of Oscillation Frequency Equivalent Series Resistance (ESR) Shunt Capacitance 25 Test Conditions Minimum Typical Fundamental 26.5625 50 7 MHz pF Maximum Units
TABLE 5. AC CHARACTERISTICS, VCC = 3.3V±5%, TA = -30°C TO 85°C
Symbol Parameter FOUT Output Frequency Phase Jitter; NOTE 1 Output Rise/Fall Time Output Duty Cycle 106.25MHz 100MHz 20% to 80% Test Conditions Minimum 100 0.802 0.803 400 50 Typical Maximum 106.25 Units MHz ps ps ps %
tjit(Ø)
t R / tF odc
NOTE 1: This parameter is defined in accordance with JEDEC Standard 65.
843011AG
www.icst.com/products/hiperclocks.html
3
REV. B MAY 11, 2004
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