840051AGILF

ICS840051I FEMTOCLOCKS™ CRYSTAL-TOLVCMOS/LVTTL CLOCK GENERATOR PRODUCT DISCONTINUATION NOTICE - LAST TIME BUY EXPIRES MAY 6, 2017 GENERAL DESCRIPTION FEATURES The 840051I is a Gigabit Ethernet Clock Generator and a member of the HiPerClocksTM family of high performance devices from ICS. The 840051I can synthesize 10 Gigabit Ethernet, SONET, or Serial ATA reference clock fre-quencies with the appropriate choice of crystal and output divider. The 840051I has excellent phase jitter performance and is packaged in a small 8-pin TSSOP, making it ideal for use in systems with limited board space. • 1 LVCMOS/LVTTL output, 15Ω output impedance • Crystal oscillator interface designed for 18pF parallel resonant crystals • Output frequency range: 70MHz - 170MHz • VCO range: 560MHz - 680MHz • RMS phase jitter at 155.52MHz (1.875MHz - 20MHz): 0.48ps (typical) • RMS phase noise at 155.52MHz Offset Noise Power 100Hz ................-99.7 dBc/Hz 1KHz .................-120 dBc/Hz 10KHz .................-128 dBc/Hz 100KHz .................-127 dBc/Hz • 3.3V or 2.5V operating supply • -40°C to 85°C ambient operating temperature • Lead-Free fully RoHS compliant • Not Recommended For New Designs • For drop in replacement part use 840N051i FREQUENCY TABLE Inputs Crystal Frequency (MHz) FREQ_SEL Output Frequency (MHz) 20.141601 0 161.132812 20.141601 1 80.566406 19.53125 0 156.25 19.53125 1 78.125 19.44 0 155.52 19.44 1 77.76 18.75 0 150 18.75 1 75 BLOCK DIAGRAM PIN ASSIGNMENT VDDA OE XTAL_OUT XTAL_IN 1 2 3 4 VDD Q0 GND FREQ_SEL 8 7 6 5 840051I 8-Lead TSSOP 4.40mm x 3.0mm x 0.925mm package body G Package Top View 840051AGI REV. A 5/20/16 1 ICS840051I FEMTOCLOCKS™ CRYSTAL-TOLVCMOS/LVTTL CLOCK GENERATOR PRODUCT DISCONTINUATION NOTICE - LAST TIME BUY EXPIRES MAY 6, 2017 TABLE 1. PIN DESCRIPTIONS Number Name Type Description 1 VDDA Power 2 OE Input 3, 4 XTAL_OUT, XTAL_IN Input 5 FREQ_SEL Input 6 GND Power Power supply ground. 7 Q0 Output Single-ended clock output. LVCMOS/LVTTL interface levels. 15Ω output impedance. 8 VDD Power Core supply pin. Analog supply pin. Pullup Output enable pin. When HIGH, Q0 output is enabled. When LOW, forces Q0 to HiZ state. LVCMOS/LVTTL interface levels. See Table 3A. Crystal oscillator interface. XTAL_IN is the input, XTAL_OUT is the output. Pulldown Frequency select pin. LVCMOS/LVTTL interface levels. See Table 3B. NOTE: Pullup and Pulldown refer to internal input resistors. See Table 2, Pin Characteristics, for typical values. TABLE 2. PIN CHARACTERISTICS Symbol Parameter CIN Input Capacitance Test Conditions CPD Power Dissipation Capacitance 7 pF RPULLUP Input Pullup Resistor 51 KΩ RPULLDOWN Input Pulldown Resistor 51 KΩ ROUT Output Impedance 15 Ω VDD, VDDA = 3.465V VDD, VDDA = 2.625V Minimum Typical Maximum Units 4 pF 7 pF TABLE 3A. CONTROL FUNCTION TABLE Control Input Output OE Q0 0 Hi-Z 1 Active TABLE 3B. FREQ_SEL FUNCTION TABLE Control Input FRE_SEL N Divider 0 ÷4 (default) 1 ÷8 840051AGI REV. A 5/20/16 2 ICS840051I FEMTOCLOCKS™ CRYSTAL-TOLVCMOS/LVTTL CLOCK GENERATOR PRODUCT DISCONTINUATION NOTICE - LAST TIME BUY EXPIRES MAY 6, 2017 ABSOLUTE MAXIMUM RATINGS Supply Voltage, VDD 4.6V Inputs, VI -0.5V to VDD + 0.5 V Outputs, VO -0.5V to VDD + 0.5V Package Thermal Impedance, θJA 101.7°C/W (0 mps) Storage Temperature, TSTG -65°C to 150°C 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. TABLE 4A. POWER SUPPLY DC CHARACTERISTICS, VDD = VDDA = 3.3V±5%, TA = -40°C TO 85°C Symbol Parameter Minimum Typical Maximum Units VDD Core Supply Voltage Test Conditions 3.135 3.3 3.465 V VDDA Analog Supply Voltage 3.135 3.3 3.465 V IDD Power Supply Current 60 mA IDDA Analog Supply Current 10 mA TABLE 4B. POWER SUPPLY DC CHARACTERISTICS, VDD = VDDA = 2.5V±5%, TA = -40°C TO 85°C Symbol Parameter Minimum Typical Maximum Units VDD Core Supply Voltage Test Conditions 2.375 2.5 2.625 V VDDA Analog Supply Voltage 2.375 2.5 2.625 V IDD Power Supply Current 55 mA IDDA Analog Supply Current 10 mA Maximum Units VDD + 0.3 V TABLE 4C. LVCMOS/LVTTL DC CHARACTERISTICS, VDD = VDDA = 3.3V±5%, TA = -40°C TO 85°C Symbol Parameter VIH Input High Voltage VIL Input Low Voltage Test Conditions Minimum Typical 2 0.8 V FREQ_SEL VDD = VIN = 3.465V or 2.625V -0.3 150 µA OE VDD = VIN = 3.465V or 2.625V 5 µA IIH Input High Current IIL Input Low Current VOH Output High Voltage; NOTE 1 VOL Output Low Voltage; NOTE 1 FREQ_SEL VDD = 3.465V or 2.625V, VIN = 0V -5 µA OE VDD = 3.465V or 2.625V, VIN = 0V -150 µA VDD = 3.465V 2.6 V VDD = 2.625V 1.8 V VDD = 3.465V or 2.625V 0.5 V NOTE 1: Outputs terminated with 50Ω to VDD/2. See Parameter Measurement Information Section, “Output Load Test Circuit” diagrams. 840051AGI REV. A 5/20/16 3 ICS840051I FEMTOCLOCKS™ CRYSTAL-TOLVCMOS/LVTTL CLOCK GENERATOR PRODUCT DISCONTINUATION NOTICE - LAST TIME BUY EXPIRES MAY 6, 2017 TABLE 5. CRYSTAL CHARACTERISTICS Parameter Test Conditions Minimum Mode of Oscillation Typical Maximum Units Fundamental Frequency 21.25 MHz Equivalent Series Resistance (ESR) 17.5 50 Ω Shunt Capacitance 7 pF Maximum Units 170 MHz TABLE 6A. AC CHARACTERISTICS, VDD = VDDA = 3.3V±5%, TA = -40°C TO 85°C Symbol Parameter fOUT Output Frequency tjit(Ø) RMS Phase Jitter ( Random); NOTE 1 tR / tF Output Rise/Fall Time odc Output Duty Cycle Test Conditions Minimum Typical 70 155.52MHz, Integration Range: 1.875MHz - 20MHz 20% to 80% 0.48 ps 150 500 ps 48 52 % Maximum Units 170 MHz NOTE 1: Please refer to the Phase Noise Plots. TABLE 6B. AC CHARACTERISTICS, VDD = VDDA = 2.5V±5%, TA = -40°C TO 85°C Symbol Parameter fOUT Output Frequency tjit(Ø) RMS Phase Jitter ( Random); NOTE 1 tR / tF Output Rise/Fall Time odc Output Duty Cycle Test Conditions Minimum Typical 70 155.52MHz, Integration Range: 1.875MHz - 20MHz 20% to 80% 0.50 ps 200 600 ps 49 51 % NOTE 1: Please refer to the Phase Noise Plots. 840051AGI REV. A 5/20/16 4 ICS840051I FEMTOCLOCKS™ CRYSTAL-TOLVCMOS/LVTTL CLOCK GENERATOR PRODUCT DISCONTINUATION NOTICE - LAST TIME BUY EXPIRES MAY 6, 2017 TYPICAL PHASE NOISE AT 155.52MHZ (3.3V) 0 -10 ➤ -20 -30 10GigE Filter -40 155.52MHz NOISE POWER dBc Hz -50 RMS Phase Jitter (Random) 1.875Mhz to 20MHz = 0.48ps (typical) -60 -70 -80 -90 -100 Raw Phase Noise Data -110 ➤ -120 -130 -140 -150 -160 ➤ -170 Phase Noise Result by adding 10GigE Filter to raw data -180 -190 100 1k 10k 100k 1M 10M 100M OFFSET FREQUENCY (HZ) TYPICAL PHASE NOISE AT 155.52MHZ (2.5V) ➤ 0 -10 -20 10GigE Filter -30 -40 155.52MHz NOISE POWER dBc Hz -50 RMS Phase Jitter (Random) 1.875Mhz to 20MHz = 0.50ps (typical) -60 -70 -80 -90 -100 Raw Phase Noise Data -110 ➤ -120 -130 -140 -150 -160 -170 ➤ -180 Phase Noise Result by adding 10GigE Filter to raw data -190 100 1k 10k 100k 1M 10M 100M OFFSET FREQUENCY (HZ) 840051AGI REV. A 5/20/16 5 ICS840051I FEMTOCLOCKS™ CRYSTAL-TOLVCMOS/LVTTL CLOCK GENERATOR PRODUCT DISCONTINUATION NOTICE - LAST TIME BUY EXPIRES MAY 6, 2017 PARAMETER MEASUREMENT INFORMATION 3.3V CORE/3.3V OUTPUT LOAD AC TEST CIRCUIT 2.5V CORE/2.5V OUTPUT LOAD AC TEST CIRCUIT OUTPUT DUTY CYCLE/PULSE WIDTH/PERIOD RMS PHASE JITTER OUTPUT RISE/FALL TIME 840051AGI REV. A 5/20/16 6 ICS840051I FEMTOCLOCKS™ CRYSTAL-TOLVCMOS/LVTTL CLOCK GENERATOR PRODUCT DISCONTINUATION NOTICE - LAST TIME BUY EXPIRES MAY 6, 2017 APPLICATION INFORMATION POWER SUPPLY FILTERING TECHNIQUES As in any high speed analog circuitry, the power supply pins are vulnerable to random noise. The 840051I provides separate power supplies to isolate any high switching noise from the outputs to the internal PLL. VDD and VDDA 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 10Ω resistor along with a 10μF and a .01μF bypass capacitor should be connected to each VDDA pin. 3.3V or 2.5V VDD .01μF 10Ω VDDA .01μF 10μF FIGURE 1. POWER SUPPLY FILTERING CRYSTAL INPUT INTERFACE The 840051I has been characterized with 18pF parallel resonant crystals. The capacitor values, C1 and C2, shown in Figure 2 below were determined using a 26.04167MHz, 18pF 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. Figure 2. CRYSTAL INPUt INTERFACE 840051AGI REV. A 5/20/16 7 ICS840051I FEMTOCLOCKS™ CRYSTAL-TOLVCMOS/LVTTL CLOCK GENERATOR PRODUCT DISCONTINUATION NOTICE - LAST TIME BUY EXPIRES MAY 6, 2017 RELIABILITY INFORMATION TABLE 7. θJAVS. AIR FLOW TABLE FOR 8 LEAD TSSOP θJA by Velocity (Meters per Second) Multi-Layer PCB, JEDEC Standard Test Boards 0 1 2.5 101.7°C/W 90.5°C/W 89.8°C/W TRANSISTOR COUNT The transistor count for 840051I is: 1927 840051AGI REV. A 5/20/16 8 ICS840051I FEMTOCLOCKS™ CRYSTAL-TOLVCMOS/LVTTL CLOCK GENERATOR PRODUCT DISCONTINUATION NOTICE - LAST TIME BUY EXPIRES MAY 6, 2017 PACKAGE OUTLINE - G SUFFIX FOR 8 LEAD TSSOP TABLE 8. PACKAGE DIMENSIONS SYMBOL Millimeters Minimum N Maximum 8 A -- 1.20 A1 0.05 0.15 A2 0.80 1.05 b 0.19 0.30 c 0.09 0.20 D 2.90 E E1 3.10 6.40 BASIC 4.30 e 4.50 0.65 BASIC L 0.45 0.75 α 0° 8° aaa -- 0.10 Reference Document: JEDEC Publication 95, MO-153 840051AGI REV. A 5/20/16 9 ICS840051I FEMTOCLOCKS™ CRYSTAL-TOLVCMOS/LVTTL CLOCK GENERATOR PRODUCT DISCONTINUATION NOTICE - LAST TIME BUY EXPIRES MAY 6, 2017 TABLE 9. ORDERING INFORMATION Part/Order Number Marking Package Shipping Packaging Temperature ICS840051AGILF 51AIL 8 Lead “Lead-Free” TSSOP tube -40°C to 85°C ICS840051AGILFT 51AIL 8 Lead “Lead-Free” TSSOP 2500 tape & reel -40°C to 85°C 840051AGI REV. A 5/20/16 10 ICS840051I FEMTOCLOCKS™ CRYSTAL-TOLVCMOS/LVTTL CLOCK GENERATOR PRODUCT DISCONTINUATION NOTICE - LAST TIME BUY EXPIRES MAY 6, 2017 REVISION HISTORY SHEET Rev A A Table Page Description of Change Date T9 10 Ordering Information - removed leaded devices and added marking for the Lead Free device. 9/22/15 Added contacts page. Product Discontinuation Notice - Last time buy expires May 6, 2017. PDN CQ-16-01 840051AGI 5/20/16 REV. A 5/20/16 11 Corporate Headquarters 6024 Silver Creek Valley Road San Jose, California 95138 Sales 800-345-7015 or +408-284-8200 Fax: 408-284-2775 www.IDT.com Technical Support email: clocks@idt.com DISCLAIMER Integrated Device Technology, Inc. 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