Document
Integrated Circuit Systems, Inc.
ICS843-75
75MHZ, LVCMOS, LVPECL DUAL OUTPUT OSCILLATOR
FEATURES
• One LVCMOS/LVTTL output, 15Ω output impedence One LVPECL output pair • Crystal oscillator interface designed for 25MHz, 18pF parallel resonant crystal • Output frequency: 75MHz • Random jitter: 3.07ps (maximum) • Deterministic jitter: 0.13ps (maximum) • 3.3V operating supply • 0°C to 70°C ambient operating temperature • Available in both standard and lead-free RoHS-compliant packages
GENERAL DESCRIPTION
The ICS843-75 is a SAS/SATA Dual Output Oscillator and a member of the HiPerClocks TM HiPerClockS™ family of high performance devices from ICS. The ICS843-75 uses a 25MHz crystal to s y n t h e s i ze 7 5 M H z . T h e I C S 8 4 3 - 7 5 h a s excellent jitter performance. The ICS843-75 is packaged in a small 8-pin TSSOP, making it ideal for use in systems with limited board space.
IC S
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BLOCK DIAGRAM
LVCMOS 75MHz 25MHz
PIN ASSIGNMENT
Q0 VCC XTAL_IN XTAL_OUT VEE 1 2 3 4 8 7 6 5 Q1 nQ1 VCCO Q0
XTAL_IN
Clock Synthesizer
LVPECL 75MHz
XTAL_OUT
ICS843-75
8-Lead TSSOP 4.40mm x 3.0mm x 0.925mm package body G Package Top View
Q1 nQ1
ICS843-75
8-Lead SOIC 3.90mm x 4.92mm x 1.37mm body package M Package Top View
843AG-75
www.icst.com/products/hiperclocks.html
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REV. A JANUARY 9, 2006
Integrated Circuit Systems, Inc.
ICS843-75
75MHZ, LVCMOS, LVPECL DUAL OUTPUT OSCILLATOR
Type Power Input Power Description Positive supply pin. Crystal oscillator interface. XTAL_IN is the input, XTAL_OUT is the output. Negative supply pin. Single-ended clock output. LVCMOS/LVTTL interface levels. 15Ω output impedence. Output supply pin. Differential LVPECL output pair.
TABLE 1. PIN DESCRIPTIONS
Number 1 2, 3 4 5 6
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Name VCC XTAL_IN, XTAL_OUT VEE Q0 VCCO nQ1, Q1
Output Power Output
7, 8
TABLE 2. PIN CHARACTERISTICS
Symbol CIN ROUT Parameter Input Capacitance Output Impedance Q0 Test Conditions Minimum Typical 4 15 Maximum Units pF Ω
843AG-75
www.icst.com/products/hiperclocks.html
2
REV. A JANUARY 9, 2006
Integrated Circuit Systems, Inc.
ICS843-75
75MHZ, LVCMOS, LVPECL DUAL OUTPUT OSCILLATOR
4.6V -0.5V to VCC + 0.5 V -0.5V to VCCO + 0.5V 50mA 100mA 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. 101.7°C/W (0 mps) 112.7°C/W (0 lfpm) -65°C to 150°C
ABSOLUTE MAXIMUM RATINGS
Supply Voltage, VCC Inputs, VI Outputs, VO (LVCMOS) Outputs, IO (LVPECL) Continuous Current Surge Current
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Package Thermal Impedance, θJA 8 Lead TSSOP 8 Lead SOIC Storage Temperature, TSTG
TABLE 3A. POWER SUPPLY DC CHARACTERISTICS, VCC = VCCO = 3.3V±0.3V, TA = 0°C TO 70°C
Symbol VCC VCCO IEE ICC ICCO Parameter Positive Supply Voltage Output Supply Voltage Power Supply Current Power Supply Current Output Supply Current Test Conditions Minimum 3.0 3.0 Typical 3.3 3.3 Maximum 3.6 3.6 110 100 12 Units V V mA mA mA
TABLE 3B. LVCMOS/LVTTL DC CHARACTERISTICS, VCC = VCCO = 3.3V±0.3V, TA = 0°C TO 70°C
Symbol VOH Parameter Output High Voltage; NOTE 1 Test Conditions Minimum 2.6 0.5 Typical Maximum Units V V
Output Low Voltage; NOTE 1 VOL NOTE 1: Outputs terminated with 50Ω to VCCO/2. See Parameter Measurement Information Section, "3.3V Output Load Test Circuit".
TABLE 3C. LVPECL DC CHARACTERISTICS, VCC = VCCO = 3.3V±0.3V, TA = 0°C TO 70°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 VCCO - 1.4 VCCO - 2.0 0.6 Typical Maximum VCCO - 0.9 VCCO - 1.7 1.0 Units V V V
NOTE 1: Outputs terminated with 50Ω to VCCO - 2V.
843AG-75
www.icst.com/products/hiperclocks.html
3
REV. A JANUARY 9, 2006
Integrated Circuit Systems, Inc.
ICS843-75
75MHZ, LVCMOS, LVPECL DUAL OUTPUT OSCILLATOR
Test Conditions Minimum Typical Fundamental 25 ±30 ±30 18 ±15 1 MHz ppm ppm pF ppm mW Maximum Units
TABLE 4. CRYSTAL CHARACTERISTICS (NOTE 1)
Parameter Mode of Oscillation Frequency Frequency Tolerance Frequency Stability Over Operating Temperature Range Load Capacitance (CL); NOTE 2 Aging for 10 Years
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NOTE 1: Using an HC49/US SMD package, the parameters shown above target ±100ppm accuracy. NOTE 2: See Cr ystal Input Interface in the Application Information Section.
TABLE 5. AC CHARACTERISTICS, VCC = VCCO = 3.3V±0.3V, TA = 0°C TO 70°C
Symbol fOUT tDJ tRJ tRMS tp-p tOSC t R / tF odc Parameter Output Frequency Deterministic Jitter ; NOTE 1 Random Jitter ; NOTE 1 RMS of Total Distribution (σ); NOTE 2 Peak-to-Peak Jitter ; NOTE 1 Oscillation Star t Up Time Output Rise/Fall Time Output Duty Cycle Q0 Q1/nQ1 20% to 80% 100 250 Test Conditions Minimum .