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| July 2005 rev 0.2 3.3V 1:10 LVCMOS PLL Clock Generator Features 1:10 PLL based low-voltage clock generator Supports zero-delay operation 3.3V power supply Generates clock signals up to 250MHz Maximum output skew of 120pS Differential LVPECL reference clock input External PLL feedback Drives up to 20 clock lines 32 lead LQFP packaging Pin and function compatible to the MPC958 and MPC9658 ASM5I9658 and the reference clock frequency determines the VCO frequency. Both must be selected to match the VCO frequency range. The internal VCO of the ASM5I9658 is running at either 2x or 4x of the reference clock frequency. The ASM5I9658 has a differential LVPECL reference input along with an external feedback input. The ASM5I9658 is ideal for use as a zero delay, low skew fanout buffer. The device performance has been tuned and optimized for zero delay performance. The PLL_EN and BYPASS controls select the PLL bypass configuration for test and diagnosis. In this configuration, the selected input reference clock is bypassing the PLL and routed either to the output dividers or directly to the outputs. The PLL bypass configurations are fully static and the minimum clock frequency specification and all other PLL characteristics do not apply. The outputs can be disabled (high-impedance) and the device reset by asserting the MR/OE pin. Asserting MR/OE also causes the PLL to loose lock due to missing feedback signal presence at FB_IN. Deasserting MR/OE will enable the outputs and close the phase locked loop, enabling the PLL to recover to normal operation. The ASM5I9658 is fully 3.3V compatible and requires no external loop filter components. The inputs (except PCLK) accept LVCMOS except signals while the outputs provide LVCMOS compatible levels with the capability to drive terminated 50 transmission lines. For series terminated transmission lines, each of the ASM5I9658 outputs can drive one or two traces giving the devices an effective fanout of 1:16. The device is packaged in a 7x7 mm2 32-lead LQFP & TQFP Packages. Functional Description The ASM5I9658 is a 3.3V compatible, 1:10 PLL based clock generator and zero-delay buffer targeted for high performance low-skew clock distribution in mid-range to high-performance telecom, networking and computing applications. With output frequencies up to 250MHz and output skews less than 120pS the device meets the needs of the most demanding clock applications. The ASM5I9658 is specified for the temperature range of 0C to +70C. The ASM5I9658 utilizes PLL technology to frequency lock its outputs onto an input reference clock. Normal operation of the ASM5I9658 requires the connection of the QFB output to the feedback input to close the PLL feedback path (external feedback). With the PLL locked, the output frequency is equal to the reference frequency of the device and VCO_SEL selects the operating frequency range of 50 to 125MHz or 100 to 250MHz. The two available post-PLL dividers selected by VCO_SEL (divide-by-2 or divide-by-4) Alliance Semiconductor 2575 Augustine Drive * Santa Clara, CA * Tel: 408.855.4900 * Fax: 408.855.4999 * www.alsc.com Notice: The information in this document is subject to change without notice. July 2005 rev 0.2 Block Diagram ASM5I9658 Q0 VCC 2-25k PCLK PCLK VCC 25k FB_IN VCC 3-25k 0 & /1 /2 0 1 /2 Q1 0 1 Q2 Q3 Q4 Q5 Q6 Q7 Q8 Q9 QFB Ref VCO PLL 1 200-500 MHz FB PLL_EN VCO_SEL BYPASS MR/OE 25k Figure 1. ASM5I9658 Logic Diagram GND GND 16 15 14 VCC Q2 Q3 VCC Q4 Q5 Pin Configuration 24 23 22 21 20 19 18 17 GND Q1 VCC Q0 GND QFB VCC VCO_SEL 25 26 27 28 29 30 31 32 1 2 3 4 5 6 7 8 Q6 VCC Q7 GND Q8 VCC Q9 GND ASM5I9658 13 12 11 10 9 BYPASS VCC_PLL PLL_EN PCLK FB_IN PCLK Figure 2. ASM5I9658 32-Lead Package Pinout (Top View) 3.3V 1:10 LVCMOS PLL Clock Generator Notice: The information in this document is subject to change without notice. MR/OE GND 2 of 14 July 2005 rev 0.2 Table 1: Pin Configuration Pin # 6 7 2 32 3 4 5 28,26,24, 22,20,18, 16,14,12, 10 30 8,9,13,17 21,25,29 1 11,15,19, 23,27,31 ASM5I9658 Pin Name PCLK, PCLK FB_IN VCO_SEL BYPASS PLL_EN MR/OE Q0-9 QFB GND VCC_PLL VCC I/O Input Input Input Input Input Input Output Output Supply Supply Supply Type LVPECL LVCMOS LVCMOS LVCMOS LVCMOS LVCMOS LVCMOS LVCMOS Ground VCC VCC Function LVPECL reference clock signal PLL feedback signal input, connect to QFB Operating frequency range select PLL and output divider bypass select PLL enable/disable Output enable/disable (high-impedance tristate) and device reset Clock outputs Clock output for PLL feedback, connect to FB_IN Negative power supply (GND) PLL positive power supply (analog power supply). It is recommended to use an external RC filter for the analog power supply pin VCC_PLL. Please see applications section for details. Positive power supply for I/O and core. All VCC pins must be connected to the positive power supply for correct operation Table 2: FUNCTION TABLE Control PLL_EN Default 1 0 Test mode with PLL bypassed. The reference clock (PCLK) is substituted for the internal VCO output. ASM59658 is fully static and no minimum frequency limit applies. All PLL related AC characteristics are not applicable. Test mode with PLL and output dividers bypassed. The reference clock (PCLK) is directly routed to the outputs. ASM59658 is fully static and no minimum frequency limit applies. All PLL related AC characteristics are not applicable. VCO / 1 (High frequency range). fREF = fQ0-9 =2. fVCO 1 Selects the VCO output1 BYPASS 1 Selects the output dividers. VCO_SEL 1 VCO / 2 (Low frequency range). fREF =fQ0-9 =4.fVCO Outputs disabled (high-impedance state) and reset of the device. During reset the PLL feedback loop is open. The VCO is tied to its lowest frequency. The length of the reset pulse should be greater than one reference clock cycle (PCLK). MR/OE 0 Outputs enabled (active) Note: 1 PLL operation requires BYPASS=1 and PLL_EN=1. 3.3V 1:10 LVCMOS PLL Clock Generator Notice: The information in this document is subject to change without notice. 3 of 14 July 2005 rev 0.2 Table 3: ABSOLUTE MAXIMUM RATINGS1 Symbol VCC VIN VOUT IIN IOUT TS ASM5I9658 Characteristics Supply Voltage DC Input Voltage DC Output Voltage DC Input Current DC Output Current Storage Temperature Min -0.3 -0.3 -0.3 Max 3.9 VCC+0.3 VCC+0.3 20 50 Unit V V V mA mA C Condition -65 125 Note: 1 These are stress ratings only and are not implied for functional use. Exposure to absolute maximum ratings for prolonged periods of time may affect device reliability. Table 4: GENERAL SPECIFICATIONS Symbol VTT MM HBM LU CPD CIN Characteristics Output Termination Voltage ESD Protection (Machine Model) ESD Protection (Human Body Model) Latch-Up Immunity Power Dissipation Capacitance Input Capacitance LQFP 32 Thermal resistance junction to ambient JESD 51-3, single layer test board Min 200 2000 200 Typ VCC/2 Max Unit V V V mA Condition 10 4.0 83.1 73.3 68.9 86.0 75.4 70.9 65.3 59.6 60.6 55.7 53.8 51.5 48.8 26.3 pF pF C/W C/W C/W C/W C/W C/W C/W C/W C/W C/W C/W Per output Inputs Natural convection 100 ft/min 200 ft/min 400 ft/min 800 ft/min Natural convection 100 ft/min 200 ft/min 400 ft/min 800 ft/min MIL-SPEC 883E Method 1012.1 JA JESD 51-6, 2S2P multilayer test board 63.8 57.4 59.0 54.4 52.5 50.4 47.8 JC LQFP 32 Thermal resistance junction to case 23.0 3.3V 1:10 LVCMOS PLL Clock Generator Notice: The information in this document is subject to change without notice. 4 of 14 July 2005 rev 0.2 Table 5: DC CHARACTERISTICS (VCC = 3.3V 5%, TA = 0C to 70C) Symbol VIH VIL VPP VCMR1 VOH VOL ZOUT IIN ICC_PLL ICCQ ASM5I9658 Characteristics Input high voltage Input low voltage Peak-to-peak input voltage (PCLK) Common Mode Range (PCLK) Output High Voltage Output Low Voltage3 Output impedance Input Current 4 Min 2.0 250 1.0 2.4 Typ Max VCC +0.3 0.8 Unit V V mV Condition LVCMOS LVCMOS LVPECL LVPECL IOH=-24 mA2 IOL=24mA IOL=12mA VIN=VCC or GND VCC_PLL Pin All VCC Pins VCC-0.6 0.55 0.30 14 -17 200 12 13 15 15 V V V V A mA mA Maximum PLL Supply Current Maximum Quiescent Supply Current Note: 1. VCMR (DC) is the cross point of the differential input signal. Functional operation is obtained ,when the crosspoint is within the VCMR range and the input swing lies within the VPP (DC) specification. 2.The ASM3P9658 is capable of driving 50transmission lines on the incident edge. Each output drives one 50parallel terminated transmission line to a termination voltage of VTT. Alternatively, the device drives up to two 50series terminated transmission lines. 3.The ASM5I9658 output levels are compatible to the MPC958 output levels. 4.Inputs have pull-down or pull-up resistors affecting the input current. 3.3V 1:10 LVCMOS PLL Clock Generator Notice: The information in this document is subject to change without notice. 5 of 14 July 2005 rev 0.2 Table 6: AC CHARACTERISTICS (VCC = 3.3V 5%, TA = 0C to 70C)1 Symbol Characteristics fREF fVCO fMAX VPP VCMR6 tPW,MIN t(O) tPD tsk(O) DC tR ,tF tPLZ, HZ tPZL, LZ tJIT(CC) tJIT(PER) tJIT(O) BW tLOCK Input reference frequency PLL mode, external feedback /2 feedback2 /4 feedback3 ASM5I9658 Min 100 50 0 200 100 50 500 1.2 2 -70 -125 1.0 (T/2)400 0.1 Typ Max 250 125 250 500 250 125 1000 VCC-0.9 Unit MHz MHz MHz MHz MHz MHz mV V nS Condition PLL locked PLL locked Input reference frequency in PLL bypass mode4 VCO operating frequency range5 Output Frequency /2 feedback /4 feedback4 3 PLL locked PLL locked LVPECL LEPVCL Peak-to-peak input voltage PCLK Common Mode Range PCLK Input Reference Pulse Width7 Propagation Delay (static phase offset) 8 PCLK to FB_IN fREF=100MHz any frequency Propagation Delay PLL and divider bypass, PCLK to Q0-9 Output-to-output Skew9 Output duty cycle10 Output Rise/Fall Time Output Disable Time Output Enable Time Cycle-to-cycle jitter Period Jitter I/O Phase Jitter fVCO=500 MHz and / 2 feedback, RMS (1)11 fVCO=500 MHz and / 4 feedback, RMS (1) 12 /2 feedback8 PLL closed loop bandwidth PLL mode, external feedback /4 feedback9 Maximum PLL Lock Time +80 +125 4.0 120 (T/2)+4 00 1.0 7.0 6.0 80 80 5.5 6.5 6-20 2-8 10 pS pS nS pS pS nS nS nS pS pS pS pS MHz MHz mS PLL locked T/2 0.55 to 2.4V Note:1. AC characteristics apply for parallel output termination of 50 to VTT. 2. /2 PLL feedback (high frequency range) requires VCO_SEL=0, PLL_EN=1, BYPASS=1 and MR/OE=0. 3./4 PLL feedback (low frequency range) requires VCO_SEL=1, PLL_EN=1, BYPASS=1 and MR/OE=0. 4.In bypass mode, the ASM3P9658 divides the input reference clock. 5.The input frequency fREF must match the VCO frequency range divided by the feedback divider ratio FB: fREF = fVCO / FB. 6.VCMR (AC) is the crosspoint of the differential input signal. Normal AC operation is obtained when the crosspoint is within the VCMR range and the input swing lies within the VPP (AC) specification. Violation of VCMR or VPP impacts static phase offset t(O). 7.Calculation of reference duty cycle limits: DCREF,MIN = tPW,MIN . fREF. 100% and DCREF,MAX = 100% - DCREF,MIN. 8.Valid for fREF=50 MHz and FB=/8 (VCO_SEL=1). For other reference frequencies: t(O) [pS] = 50 pS (1/(120 . fREF)). 9.See application section for part-to-part skew calculation in PLL zero-delay mode. 10.Output duty cycle is DC = (0.5 400 pS. fOUT) V 100%. E.g. the DC range at fOUT=100MHz is 46% Notice: The information in this document is subject to change without notice. 6 of 14 July 2005 rev 0.2 Applications Information Driving Transmission Lines The ASM5I9658 supports output clock frequencies from 50 to 250MHz. Two different feedback divider configurations can be used to achieve the desired frequency operation range. The feedback divider (VCO_SEL) should be used to situate the VCO in the frequency lock range between 200 and 500MHz for ASM5I9658 stable and optimal operation. Two operating frequency ranges are supported: 50 to 125MHz and 100 to 250 MHz. Table 7 illustrates the configurations supported by the ASM5I9658. PLL zero-delay is supported if BYPASS=1, PLL_EN=1 and the input frequency is within the specified PLL reference frequency range. Table 7: ASM5I9658 Configurations (QFB connected to FB_IN) BYPASS 0 1 1 1 1 PLL_ EN X 0 0 1 1 VCO_ SEL X 0 1 0 1 Operation Test mode: PLL and divider bypass Test mode: PLL bypass Test mode: PLL bypass PLL mode (high frequency range) PLL mode (low frequency range) Ratio fQ0-9 =fREF fQ0-9 =fREF / 2 fQ0-9 =fREF / 4 fQ0-9 =fREF fQ0-9 =fREF Frequency Output range (fQ0-7) 0-250 MHz 0-125 MHz 0-62.5 MHz 100 to 250 MHz 50 to 125 MHz VCO n/a n/a n/a fVCO =fREF 2 fVCO =fREF 4 Power Supply Filtering The ASM5I9658 is a mixed analog/digital product. Its analog circuitry is naturally susceptible to random noise, especially if this noise is seen on the power supply pins. Random noise on the VCCA_PLL power supply impacts the device characteristics, for instance I/O jitter. The ASM5I9658 provides separate power supplies for the output buffers (VCC) and the phase-locked loop (VCCA_PLL) of the device. The purpose of this design technique is to isolate the high switching noise digital outputs from the relatively sensitive internal analog phase-locked loop. In a digital system environment where it is more difficult to minimize noise on the power supplies a second level of isolation may be required. The simple but effective form of isolation is a power supply filter on the VCC_PLL pin for the ASM5I9658. Figure 3. illustrates a typical power supply filter scheme. The ASM5I9658 frequency and phase stability is most susceptible to noise with spectral content in the 100KHz to 20MHz range. Therefore the filter should be designed to target this range. The key parameter that needs to be met in the final filter design is the DC voltage drop across the series filter resistor RF. From the data sheet the ICC_PLL current (the current sourced through the VCC_PLL pin) is typically 12 mA (20 mA maximum), assuming that a minimum of 2.835V must be maintained on the VCC_PLL pin. The minimum values for RF and the filter capacitor CF are defined by the required filter characteristics: the RC filter should provide attenuation greater than 40 dB for ASM5I9658 Figure 3. VCC_PLL Power Supply Filter noise whose spectral content is above 100 KHz. In the example RC filter shown in Figure 3."VCC_PLL Power Supply Filter", the filter cut-off frequency is around 3-5 kHz and the noise attenuation at 100 kHz is better than 42dB. As the noise frequency crosses the series resonant point of an individual capacitor its overall impedance begins to look inductive and thus increases with increasing frequency. The parallel capacitor combination shown ensures that a low impedance path to ground exists for frequencies well above the bandwidth of the PLL. Although the ASM5I9658 has several design features to minimize the susceptibility to power supply noise (isolated power and grounds and fully differential PLL) there still may be applications in which overall performance is being degraded due to system power supply noise. The power 3.3V 1:10 LVCMOS PLL Clock Generator Notice: The information in this document is subject to change without notice. 7 of 14 July 2005 rev 0.2 supply filter schemes discussed in this section should be adequate to eliminate power supply noise related problems in most designs. ASM5I9658 Due to the statistical nature of I/O jitter a RMS value (1) is specified. I/O jitter numbers for other confidence factors (CF) can be derived from Table 8. Using the ASM5I9658 in zero-delay applications Nested clock trees are typical applications for the ASM5I9658. Designs using the ASM5I9658, as LVCMOS PLL fanout buffer with zero insertion delay will show significantly lower clock skew than clock distributions developed from CMOS fanout buffers. The external feedback option of the ASM59658 clock driver allows for its use as a zero delay buffer. The PLL aligns the feedback clock output edge with the clock input reference edge resulting a near zero delay through the device (the propagation delay through the device is virtually eliminated). The maximum insertion delay of the device in zero-delay applications is measured between the reference clock input and any output. This effective delay consists of the static phase offset, I/O jitter (phase or long-term jitter), feedback path delay and the output-tooutput skew error relative to the feedback output. Table 8: Confidence Factor CF Probability of clock edge within the CF distribution 1 2 3 4 5 6 0.68268948 0.95449988 0.99730007 0.99993663 0.99999943 0.99999999 Calculation of part-to-part skew The ASM5I9658 zero delay buffer supports applications where critical clock signal timing can be maintained across several devices. If the reference clock inputs of two or more ASM5I9658 are connected together, the maximum overall timing uncertainty from the common PCLK input to any output is: tSK(PP) = t() + tSK(O) + tPD, LINE(FB) + tJIT() _ CF This maximum timing uncertainty consist of 4 components: static phase offset, output skew, feedback board trace delay and I/O (phase) jitter: The feedback trace delay is determined by the board layout and can be used to fine-tune the effective delay through each device. In the following example calculation a I/O jitter confidence factor of 99.7% (3) is assumed, resulting in a worst case timing uncertainty from input to any output of -214 pS to 224 pS relative to PCLK (fREF = 100 MHz, FB=/4, tjit()=8 pS RMS at fVCO = 400 MHz): tSK(PP) = [-70pS...80pS] + [-120pS...120pS] + [(8pS _ -3)...(8pS _ 3)] + tPD, LINE(FB) tSK(PP) = [-214pS...224pS] + tPD, LINE(FB) Due to the frequency dependence of the I/O jitter, Figure 5. can be used for a more precise timing performance analysis. Figure 5. Maximum I/O Jitter versus frequency Figure 4. ASM5I9658 max device-to-device skew 3.3V 1:10 LVCMOS PLL Clock Generator Notice: The information in this document is subject to change without notice. 8 of 14 July 2005 rev 0.2 Driving Transmission Lines The ASM5I9658 clock driver was designed to drive high speed signals in a terminated transmission line environment. To provide the optimum flexibility to the user the output drivers were designed to exhibit the lowest impedance possible. With an output impedance of less than 20 the drivers can drive either parallel or series terminated transmission lines. In most high performance clock networks point-to-point distribution of signals is the method of choice. In a point-to-point scheme either series terminated or parallel terminated transmission lines can be used. The parallel technique terminates the signal at the end of the line with a 50 resistance to VCC/2. This technique draws a fairly high level of DC current and thus only a single terminated line can be driven by each output of the ASM59658 clock driver. For the series terminated case however there is no DC current draw, thus the outputs can drive multiple series terminated lines. Figure 6. "Single versus Dual Transmission Lines" illustrates an output driving a single series terminated line versus two series terminated lines in parallel. When taken to its extreme the fanout of the ASM5I9658 clock driver is effectively doubled due to its capability to drive multiple lines. ASM5I9658 OUTPUT BUFFER IN 14 RS=36 Z0=50 OUTA ASM5I9658 this step is caused by the impedance mismatch seen looking into the driver. The parallel combination of the 36 series resistor plus the output impedance does not match the parallel combination of the line impedances. The voltage wave launched down the two lines will equal: VL = VS ( Z0 /(RS+R0 +Z0)) Z0 = 50|| 50 RS = 36 || 36 R0 = 14 VL = 3.0 ( 25 /(18+14+25)) = 1.31V At the load end the voltage will double, due to the near unity reflection coefficient, to 2.6V. It will then increment towards the quiescent 3.0V in steps separated by one round trip delay (in this case 4.0nS). Figure 7. Single versus Dual Waveforms ASM5I9658 OUTPUT BUFFER IN 14 RS=36 RS=36 Z0=50 OUTB0 Z0=50 OUTB1 Figure 6. Single versus Dual Transmission Lines The waveform plots in Figure 7. "Single versus Dual Line Termination Waveforms" show the simulation results of an output driving a single line versus two lines. In both cases the drive capability of the ASM5I9658 output buffer is more than sufficient to drive 50 transmission lines on the incident edge. Note from the delay measurements in the simulations a delta of only 43pS exists between the two differently loaded outputs. This suggests that the dual line driving need not be used exclusively to maintain the tight output-to-output skew of the ASM5I9658. The output waveform in Figure 7. "Single versus Dual Line Termination Waveforms" shows a step in the waveform, Since this step is well above the threshold region it will not cause any false clock triggering, however designers may be uncomfortable with unwanted reflections on the line. To better match the impedances when driving multiple lines the situation in Figure 8. "Optimized Dual Line Termination" should be used. In this case the series terminating resistors are reduced such that when the parallel combination is added to the output buffer impedance the line impedance is perfectly matched. ASM5I9658 OUTPUT BUFFER IN 14 RS=22 RS=22 Z0=50 Z0=50 14 + 22 || 22 = 50 || 50 25 = 25 Figure 8. Optimized Dual Line Termination 3.3V 1:10 LVCMOS PLL Clock Generator Notice: The information in this document is subject to change without notice. 9 of 14 July 2005 rev 0.2 ASM5I9658 ASM5I9658 Figure 9. PCLK ASM5I9658 AC test reference Figure 16. Output Transition Time Test Reference 3.3V 1:10 LVCMOS PLL Clock Generator Notice: The information in this document is subject to change without notice. 10 of 14 July 2005 rev 0.2 Package Information 32-lead LQFP Package ASM5I9658 SECTION A-A Dimensions Symbol A A1 A2 D D1 E E1 L L1 T T1 b b1 R0 e a Inches Min Max .... 0.0020 0.0531 0.3465 0.2717 0.3465 0.2717 0.0177 0.0035 0.0038 0.0118 0.0118 0.0031 0 0.0630 0.0059 0.0571 0.3622 0.2795 0.3622 0.2795 0.0295 0.0079 0.0062 0.0177 0.0157 0.0079 7 Millimeters Min Max ... 0.05 1.35 8.8 6.9 8.8 6.9 0.45 0.09 0.097 0.30 0.30 0.08 0 1.6 0.15 1.45 9.2 7.1 9.2 7.1 0.75 0.2 0.157 0.45 0.40 0.20 7 0.03937 REF 1.00 REF 0.031 BASE 0.8 BASE 3.3V 1:10 LVCMOS PLL Clock Generator Notice: The information in this document is subject to change without notice. 11 of 14 July 2005 rev 0.2 32-lead TQFP Package ASM5I9658 SECTION A-A Symbol A A1 A2 D D1 E E1 L L1 T T1 b b1 R0 a e Dimensions Inches Millimeters Min Max Min Max .... 0.0020 0.0374 0.3465 0.2717 0.3465 0.2717 0.0177 0.0035 0.0038 0.0118 0.0118 0.0031 0 0.0472 0.0059 0.0413 0.3622 0.2795 0.3622 0.2795 0.0295 0.0079 0.0062 0.0177 0.0157 0.0079 7 ... 0.05 0.95 8.8 6.9 8.8 6.9 0.45 0.09 0.097 0.30 0.30 0.08 0 0.8 BASE 1.2 0.15 1.05 9.2 7.1 9.2 7.1 0.75 0.2 0.157 0.45 0.40 0.2 7 0.03937 REF 1.00 REF 0.031 BASE 3.3V 1:10 LVCMOS PLL Clock Generator Notice: The information in this document is subject to change without notice. 12 of 14 July 2005 rev 0.2 Ordering Information Part Number ASM5I9658-32-ER ASM5I9658-32-LR ASM5I9658G-32-ER ASM5I9658G-32-LR ASM5I9658 Marking ASM5I9658 ASM5I9658 ASM5I9658G ASM5I9658G Package Type 32-pin TQFP 32-pin LQFP -Tape and Reel 32-pin TQFP, Green 32-pin LQFP -Tape and Reel, Green Operating Range Industrial Industrial Industrial Industrial Device Ordering Information ASM 5I9658 F-32-LR R = Tape & reel, T = Tube or Tray O = SOT S = SOIC T = TSSOP A = SSOP V = TVSOP B = BGA Q = QFN DEVICE PIN COUNT F = LEAD FREE AND RoHS COMPLIANT PART G = GREEN PACKAGE U = MSOP E = TQFP L = LQFP U = MSOP P = PDIP D = QSOP X = SC-70 PART NUMBER X= Automotive I= Industrial P or n/c = Commercial (-40C to +125C) (-40C to +85C) (0C to +70C) 1 = Reserved 2 = Non PLL based 3 = EMI Reduction 4 = DDR support products 5 = STD Zero Delay Buffer 6 = Power Management 7 = Power Management 8 = Power Management 9 = Hi Performance 0 = Reserved ALLIANCE SEMICONDUCTOR MIXED SIGNAL PRODUCT Licensed under US patent #5,488,627, #6,646,463 and #5,631,920. 3.3V 1:10 LVCMOS PLL Clock Generator Notice: The information in this document is subject to change without notice. 13 of 14 July 2005 rev 0.2 ASM5I9658 Alliance Semiconductor Corporation 2575, Augustine Drive, Santa Clara, CA 95054 Tel# 408-855-4900 Fax: 408-855-4999 www.alsc.com Copyright (c) Alliance Semiconductor All Rights Reserved Part Number: ASM5I9658 Document Version: 0.2 Note: This product utilizes US Patent # 6,646,463 Impedance Emulator Patent issued to Alliance Semiconductor, dated 11-11-2003 (c) Copyright 2003 Alliance Semiconductor Corporation. All rights reserved. Our three-point logo, our name and Intelliwatt are trademarks or registered trademarks of Alliance. All other brand and product names may be the trademarks of their respective companies. Alliance reserves the right to make changes to this document and its products at any time without notice. Alliance assumes no responsibility for any errors that may appear in this document. The data contained herein represents Alliance's best data and/or estimates at the time of issuance. Alliance reserves the right to change or correct this data at any time, without notice. If the product described herein is under development, significant changes to these specifications are possible. The information in this product data sheet is intended to be general descriptive information for potential customers and users, and is not intended to operate as, or provide, any guarantee or warrantee to any user or customer. Alliance does not assume any responsibility or liability arising out of the application or use of any product described herein, and disclaims any express or implied warranties related to the sale and/or use of Alliance products including liability or warranties related to fitness for a particular purpose, merchantability, or infringement of any intellectual property rights, except as express agreed to in Alliance's Terms and Conditions of Sale (which are available from Alliance). All sales of Alliance products are made exclusively according to Alliance's Terms and Conditions of Sale. The purchase of products from Alliance does not convey a license under any patent rights, copyrights; mask works rights, trademarks, or any other intellectual property rights of Alliance or third parties. Alliance does not authorize its products for use as critical components in life-supporting systems where a malfunction or failure may reasonably be expected to result in significant injury to the user, and the inclusion of Alliance products in such life-supporting systems implies that the manufacturer assumes all risk of such use and agrees to indemnify Alliance against all claims arising from such use. 3.3V 1:10 LVCMOS PLL Clock Generator Notice: The information in this document is subject to change without notice. 14 of 14 |
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