ASM5I961CG-32-LT

July 2005 rev 0.2 Low Voltage Zero Delay Buffer Features Fully Integrated PLL Up to 200MHz I/O Frequency LVCMOS Outputs Outputs Disable in High Impedance LVCMOS Reference Clock Options LQFP and TQFP Packaging ±50pS Cycle–Cycle Jitter 150pS Output Skews ASM5I961C reference clock while the ASM5I961P offers an LVPECL reference clock. When pulled high the OE pin will force all of the outputs (except QFB) into a high impedance state. Because the OE pin does not affect the QFB output, down stream clocks can be disabled without the internal PLL losing lock. The ASM5I961C is fully 2.5V or 3.3V compatible and requires no external loop filter components. All control inputs accept LVCMOS compatible levels and the outputs provide low impedance LVCMOS outputs capable of driving terminated 50Ω transmission lines. For series terminated lines the ASM5I961C can drive two lines per output giving the device an effective fanout of 1:36. The device is packaged in a 32 lead LQFP and TQFP Packages. input Functional Description The ASM5I961C is a 2.5V or 3.3V compatible, 1:18 PLL based zero delay buffer. With output frequencies of up to 200MHz, output skews of 150pS the device meets the needs of the most demanding clock tree applications. The ASM5I961 is offered with two different configurations. The ASM5I961C offers an LVCMOS Block Diagram Q0 CCLK 50K FB_IN 50K F_RANGE 50K Q14 Q15 Q16 OE 50K Figure 1. ASM5I961C Logic Diagram PLL Ref 100-200 MHz FB 50-100 MHz Q1 0 1 Q2 Q3 QFB 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 Pin Configuration GND VCC Q10 Q11 Q6 Q7 Q8 Q9 ASM5I961C 24 23 22 21 20 19 18 17 Q5 Q4 Q3 GND Q2 Q1 Q0 VCC 25 26 27 28 29 30 31 32 1 2 3 4 5 6 7 8 16 15 14 VCC Q12 Q13 Q14 GND Q15 Q16 QFB ASM5I961C 13 12 11 10 9 F_RANGE VCCA CCLK OE FB_IN GND NC Figure 2. ASM5I961C 32-Lead Package Pinout (Top View) Table 1: Pin Configuration Pin # 2 7 4 Pin Name CCLK FB_IN F_RANGE OE Q0 - Q16 QFB GND I/O Input Input Input Input Output Output Supply Type LVCMOS LVCMOS LVCMOS LVCMOS LVCMOS LVCMOS Ground VCC Function PLL reference clock signal PLL feedback signal input, connect to a QFB output PLL frequency range select Output enable/disable Clock outputs PLL feedback signal output, connect to a FB_IN Negative power supply PLL positive power supply (analog power supply). The ASM5I961C requires an external RC filter for the analog power supply pin VCCA. Please see applications section for details. Positive power supply for I/O and core Not connected 6 31,30,29,27,26,25,23,22,21, 19,18,17,15,14,13,11,10 9 1,12,20,28 5 VCCA Supply VCC 8,16,24,32 3 VCC NC Supply VCC Low Voltage Zero Delay Buffer Notice: The information in this document is subject to change without notice. 2 of 15 July 2005 rev 0.2 Table 2: FUNCTION TABLE Control F_RANGE OE Default 0 0 0 PLL high frequency range. ASM5I961C input reference and output clock frequency range is 100 – 200MHz Outputs enabled ASM5I961C 1 PLL low frequency range. ASM5I961C input reference and output clock frequency range is 50 – 100MHz Outputs disabled (high–impedance state) Table 3: ABSOLUTE MAXIMUM RATINGS1 Symbol VCC VIN VOUT IIN IOUT TS Supply Voltage DC Input Voltage DC Output Voltage DC Input Current DC Output Current Storage Temperature Range –40 Parameter Min –0.3 –0.3 –0.3 Max 3.6 VCC + 0.3 VCC + 0.3 ±20 ±50 125 Unit V V V mA mA °C 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: DC CHARACTERISTICS (VCC = 3.3V ± 5%, TA = -40°C to +85°C) Symbol VIH VIL VOH VOL ZOUT IIN CIN CPD ICCA ICC VTT Characteristic Input HIGH Voltage Input LOW Voltage Output HIGH Voltage Output LOW Voltage Output Impedance Input Current Input Capacitance Power Dissipation Capacitance Maximum PLL Supply Current Maximum Quiescent Supply Current Output Termination Voltage 4.0 8.0 2.0 VCC÷2 10 5.0 TBD 14 Min 2.0 –0.3 2.4 0.55 20 ±120 Typ Max VCC + 0.3 0.8 Unit V V V V Ω µA pF pF mA mA V Per Output VCCA Pin All VCC Pins Condition LVCMOS LVCMOS IOH = –20mA1 IOL = 20mA1 Note: 1. The ASM5I961C is capable of driving 50Ω transmission lines on the incident edge. Each output drives one 50Ω parallel terminated transmission line to a termination voltage of VTT. Alternatively, the device drives up two 50Ω series terminated transmission lines. Low Voltage Zero Delay Buffer Notice: The information in this document is subject to change without notice. 3 of 15 July 2005 rev 0.2 Table 5: AC CHARACTERISTICS (VCC = 3.3V ± 5%, TA = 40°C to +85°C)1 Symbol fref fmax frefDC tr, tf t(∅) tsk(O) DCO tr, tf tPLZ,HZ tPZL,LZ tJIT(CC) tJIT(PER) tJIT(∅) tlock Characteristic Input Frequency Maximum Output Frequency F_RANGE = 0 F_RANGE = 1 F_RANGE = 0 F_RANGE = 1 Min 100 50 100 50 25 Typ Max 200 100 200 100 75 3.0 –80 90 F_RANGE = 0 F_RANGE = 1 42 45 0.1 50 50 120 150 55 55 1.0 10 10 RMS (1σ)3 RMS (1σ) 7.0 15 10 15 10 ASM5I961C Unit MHz MHz % nS pS pS % nS nS nS pS pS nS mS Condition Reference Input Duty Cycle TCLK Input Rise/Fall Time Propagation Delay (static phase offset) Output–to–Output Skew2 Output Duty Cycle Output Rise/Fall Time Output Disable Time Output Enable Time Cycle–to–Cycle Jitter Period Jitter CCLK to FB_IN 0.8 to 2.0V PLL locked 0.55 to 2.4V I/O Phase Jitter RMS (1σ) Maximum PLL Lock Time Note: 1. AC characteristics apply for parallel output termination of 50Ω to VTT. 2. See applications section for part–to–part skew calculation 3. See applications section for calculation for other confidence factors than 1σ Low Voltage Zero Delay Buffer Notice: The information in this document is subject to change without notice. 4 of 15 July 2005 rev 0.2 Table 6: DC CHARACTERISTICS (VCC = 2.5V ± 5%, TA = –40° to 85°C) Symbol VIH VIL VOH VOL ZOUT IIN CIN CPD ICCA ICC VTT Characteristic Input HIGH Voltage Input LOW Voltage Output HIGH Voltage Output LOW Voltage Output Impedance Input Current Input Capacitance Power Dissipation Capacitance Maximum PLL Supply Current Maximum Quiescent Supply Current Output Termination Voltage 4.0 8.0 2.0 VCC ÷2 10 5.0 TBD 18 Min 1.7 –0.3 1.8 0.6 26 ±120 Typ Max VCC + 0.3 0.7 Unit V V V V Ω mA pF pF mA mA V ASM5I961C Condition LVCMOS LVCMOS IOH = –15mA1 IOL = 15mA1 Per Output VCCA Pin All VCC Pins Note: 1.The ASM5I961C is capable of driving 50Ω  transmission lines on the incident edge. Each output drives one 50Ω parallel terminated transmission line to a termination voltage of VTT. Alternatively, the device drives up two 50Ω series terminated transmission lines. Table 7: AC CHARACTERISTICS (VCC = 2.5V ± 5%, TA = 40°C to +85°C)1 Symbol fref fmax frefDC tr, tf t(∅) tsk(O) DCO tr, tf tPLZ,HZ tPZL,LZ tJIT(CC) tJIT(PER) tJIT(∅) tlock Characteristic Input Frequency Maximum Output Frequency F_RANGE = 0 F_RANGE = 1 F_RANGE = 0 F_RANGE = 1 Min 100 50 100 50 25 Typ Max 200 100 200 100 75 3.0 –80 90 F_RANGE = 0 F_RANGE = 1 40 45 0.1 50 50 120 150 60 55 1.0 10 10 RMS (1σ)3 RMS (1σ) 7.0 15 10 15 10 Unit MHz MHz % nS pS pS % nS nS nS pS pS nS mS 0.6 to 1.8V 0.7 to 1.7V PLL locked Condition Reference Input Duty Cycle TCLK Input Rise/Fall Time Propagation Delay (static phase offset) Output–to–Output Skew2 Output Duty Cycle Output Rise/Fall Time Output Disable Time Output Enable Time Cycle–to–Cycle Jitter Period Jitter CCLK to FB_IN I/O Phase Jitter RMS (1σ) Maximum PLL Lock Time Note: 1 AC characteristics apply for parallel output termination of 50Ω to VTT. 2 See applications section for part–to–part skew calculation 3 See applications section for calculation for other confidence factors than 1σ Low Voltage Zero Delay Buffer Notice: The information in this document is subject to change without notice. 5 of 15 July 2005 rev 0.2 APPLICATIONS INFORMATION Power Supply Filtering The ASM5I961C is a mixed analog/digital product and as such it exhibits some sensitivity that would not necessarily be seen on a fully digital product. Analog circuitry is naturally susceptible to random noise, especially if this noise is seen on the power supply pins. The ASM5I961C provides separate power supplies for the output buffers (VCC) and the phase–locked loop (VCCA) 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 controlled environment such as an evaluation board this level of isolation is sufficient. However, 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 simplest form of isolation is a power supply filter on the VCCA pin for the ASM5I961C. Figure 3. illustrates a typical power supply filter scheme. The ASM5I961C is most susceptible to noise with spectral content in the 10KHz to 10MHz 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 that will be seen between the VCC supply and the VCCA pin of the ASM5I961C. From the data sheet the ICCA current (the current sourced through the VCCA pin) is typically 2mA (5mA maximum), assuming that a minimum of 2.375V (VCC = 3.3V or VCC = 2.5V) must be maintained on the VCCA pin. The resistor RF shown in Figure 3. must have a resistance of 270Ω (VCC = 3.3V) or 5 to 15Ω (VCC = 2.5V) to meet the voltage drop criteria. The RC filter pictured will provide a broadband filter with approximately 100:1 attenuation for noise whose spectral content is above 20KHz. As the noise frequency crosses the series resonant point of an individual capacitor it’s 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. ASM5I961C Although the ASM5I961C 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 supply filter schemes discussed in this section should be adequate to eliminate power supply noise related problems in most designs. Driving Transmission Lines The ASM5I961C 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 15Ω 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 50Ω 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 ASM5I961C clock driver. For the series terminated case however there is no DC current draw, thus the outputs can drive multiple series terminated lines. Figure 4. illustrates an output driving a single series terminated line vs two series terminated lines in parallel. When taken to its extreme the fanout of the ASM5I961C clock driver is effectively doubled due to its capability to drive multiple lines. ASM5I961C OUTPUT BUFFER IN 14Ω RS=36Ω Z0=50Ω OUTA ASM5I961C OUTPUT BUFFER IN 14Ω RS=36Ω Z0=50Ω OUTB0 RS=36Ω Z0=50Ω OUTB1 Figure 4. Single versus Dual Transmission Lines The waveform plots of Figure 5. show the simulation results of an output driving a single line vs two lines. In both cases the drive capability of the ASM5I961C output buffer is more than sufficient to drive 50Ω 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 ASM5I961C. The output waveform in Figure 5. shows Figure 3. Power Supply Filter Low Voltage Zero Delay Buffer Notice: The information in this document is subject to change without notice. 6 of 15 July 2005 rev 0.2 a step in the waveform, this step is caused by the impedance mismatch seen looking into the driver. The parallel combination of the 36Ω 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 ( Zo / (Rs + Ro +Zo)) Zo = 50Ω || 50Ω Rs = 36Ω || 36Ω Ro = 14Ω VL = 3.0 (25 / (18 + 14 + 25) = 3.0 (25 / 57) = 1.31V At the load end the voltage will double, due to the near unity reflection coefficient, to 2.62V. It will then increment towards the quiescent 3.0V in steps separated by one round trip delay (in this case 4.0nS). ASM5I961C Using the ASM5I961C in zero-delay applications Nested clock trees are typical applications for the ASM5I961C. Designs using the ASM5I961C 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 ASM5I961C clock driver allows for its use as a zero delay buffer. By using the QFB output as a feedback to the PLL the propagation delay through the device is virtually eliminated. The PLL aligns the feedback clock output edge with the clock input reference edge resulting a near zero delay through the device. 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-to-output skew error relative to the feedback output. Calculation of part-to-part skew The ASM5I961C 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 ASM5I961C are connected together, the maximum overall timing uncertainty from the common CCLK input to any output is: tSK(PP) = t(ϕ) + tSK(O) + tPD, LINE(FB) + tJIT(ϕ) CF This maximum timing uncertainty consist of 4 components: static phase offset, output skew, feedback board trace delay and I/O (phase) jitter: Figure 5. Single versus Dual Waveforms 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 6. 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. ASM5I961C OUTPUT BUFFER IN 14Ω RS=22Ω RS=22Ω Z0=50Ω Z0=50Ω Figure 7. ASM5I961C max. device-to-device skew 14Ω + 22Ω ║ 22Ω = 50Ω ║ 50Ω 25Ω = 25Ω Figure 6. Optimized Dual Line Termination Due to the statistical nature of I/O jitter a rms value (1σ) is specified. I/O jitter numbers for other confidence factors (CF) can be derived from Table 8. Low Voltage Zero Delay Buffer Notice: The information in this document is subject to change without notice. 7 of 15 July 2005 rev 0.2 Table 8: Confidence Factor CF CF ± 1σ ± 2σ ± 3σ ± 4σ ± 5σ ± 6σ Probability of clock edge within the distribution 0.68268948 0.95449988 0.99730007 0.99993663 0.99999943 0.99999999 ASM5I961C term reliability may decrease the maximum frequency limit, depending on operating conditions such as clock frequency, supply voltage, output loading, ambient temperature, vertical convection and thermal conductivity of package and board. This section describes the impact of these parameters on the junction temperature and gives a guideline to estimate the ASM5I961C die junction temperature and the associated device reliability. Table 9: Die junction temperature and MTBF Junction temperature (°C) 100 110 120 130 MTBF (Years) 20.4 9.1 4.2 2.0 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 σ) is assumed, resulting in a worst case timing uncertainty from input to any output of -275 pS to 315 pS relative to CCLK: tSK(PP) = [–80pS...120pS] + [–150pS...150pS] + [(15pS _ –3)...(15pS _ 3)] + tPD, LINE(FB) tSK(PP) = [–275pS...315pS] + tPD, LINE(FB) Due to the frequency dependence of the I/O jitter, Figure 8. “Max. I/O Jitter versus frequency” can be used for a more precise timing performance analysis. Figure 8. Max. I/O Jitter versus frequency Power Consumption of the ASM5I961C and Thermal Management The ASM5I961C AC specification is guaranteed for the entire operating frequency range up to 200MHz. The ASM5I961C power consumption and the associated long- Increased power consumption will increase the die junction temperature and impact the device reliability (MTBF). According to the system-defined tolerable MTBF, the die junction temperature of the ASM5I961C needs to be controlled and the thermal impedance of the board/package should be optimized. The power dissipated in the ASM5I961C is represented in equation 1. Where ICCQ is the static current consumption of the ASM5I961C, CPD is the power dissipation capacitance per output, (M)ΣCL represents the external capacitive output load, N is the number of active outputs (N is always 27 in case of the ASM5I961C). The ASM5I961C supports driving transmission lines to maintain high signal integrity and tight timing parameters. Any transmission line will hide the lumped capacitive load at the end of the board trace, therefore, ΣCL is zero for controlled transmission line systems and can be eliminated from equation 1. Using parallel termination output termination results in equation 2 for power dissipation. In equation 2, P stands for the number of outputs with a parallel or thevenin termination, VOL, IOL, VOH and IOH are a function of the output termination technique and DCQ is the clock signal duty cycle. If transmission lines are used ΣCL is zero in equation 2 and can be eliminated. In general, the use of controlled transmission line techniques eliminates the impact of the lumped capacitive loads at the end lines and greatly reduces the power dissipation of the device. Equation 3 describes the die junction temperature TJ as a function of the power consumption. Low Voltage Zero Delay Buffer Notice: The information in this document is subject to change without notice. 8 of 15 July 2005 rev 0.2 ASM5I961C Where Rthja is the thermal impedance of the package (junction to ambient) and TA is the ambient temperature. According to Table 9, the junction temperature can be used to estimate the long-term device reliability. Further, combining equation 1 and equation 2 results in a maximum operating frequency for the ASM5I961C in a series terminated transmission line system. Table 10: Thermal package impedance of the 32 LQFP Convection, LFPM Still air 100 lfpm 200 lfpm 300 lfpm 400 lfpm 500 lfpm Rthja (1P2S board), °C/W 80 70 61 57 56 55 TJ,MAX should be selected according to the MTBF system requirements and Table 9. Rthja can be derived from Table 10. The Rthja represent data based on 1S2P boards, using 2S2P boards will result in a lower thermal impedance than indicated below. If the calculated maximum frequency is below 200MHz, it becomes the upper clock speed limit for the given application conditions. The following two derating charts describe the safe frequency operation range for the ASM5I961C. The charts were calculated for a maximum tolerable die junction temperature of 110°C, corresponding to an estimated MTBF of 9.1 years, a supply voltage of 3.3V and series terminated transmission line or capacitive loading. Depending on a given set of these operating conditions and the available device convection a decision on the maximum operating frequency can be made. There are no operating frequency limitations if a 2.5V power supply or the system specifications allow for a MTBF of 4 years (corresponding to a max. junction temperature of 120°C. Low Voltage Zero Delay Buffer Notice: The information in this document is subject to change without notice. 9 of 15 July 2005 rev 0.2 ASM5I961C Figure 9. Maximum ASM5I961C frequency, VCC = 3.3V, MTBF 9.1 years, driving series terminated transmission Figure 10. Maximum ASM5I961C frequency, VCC = 3.3V, MTBF 9.1 years,4pF load per line Figure 11. TCLK ASM5I961C AC test reference for VCC = 3.3V and VCC =2.5V Low Voltage Zero Delay Buffer Notice: The information in this document is subject to change without notice. 10 of 15 July 2005 rev 0.2 ASM5I961C Low Voltage Zero Delay Buffer Notice: The information in this document is subject to change without notice. 11 of 15 July 2005 rev 0.2 Package Diagram 32-lead TQFP Package ASM5I961C SECTION A-A Dimensions Symbol A A1 A2 D D1 E E1 L L1 T T1 b b1 R0 a e Inches 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° Millimeters Min Max … 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 Low Voltage Zero Delay Buffer Notice: The information in this document is subject to change without notice. 12 of 15 July 2005 rev 0.2 32-lead LQFP Package ASM5I961C 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 Low Voltage Zero Delay Buffer Notice: The information in this document is subject to change without notice. 13 of 15 July 2005 rev 0.2 Ordering Information Part Number ASM5I961C-32-ET ASM5I961C-32-LT ASM5I961CG-32-ET ASM5I961CG-32-LT ASM5I961C Marking ASM5I961C ASM5I961C ASM5I961CG ASM5I961CG Package Type 32 pin TQFP 32 pin LQFP – Tape and Reel 32 pin TQFP, Green 32 pin LQFP – Tape and Reel, Green Temperature Industrial Industrial Industrial Industrial Device Ordering Information ASM 5I961C F-32-LT 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. Low Voltage Zero Delay Buffer Notice: The information in this document is subject to change without notice. 14 of 15 July 2005 rev 0.2 ASM5I961C Alliance Semiconductor Corporation 2575 Augustine Drive, Santa Clara, CA 95054 Tel# 408-855-4900 Fax: 408-855-4999 www.alsc.com Copyright © Alliance Semiconductor All Rights Reserved Part Number: ASM5I961C Document Version: 0.2 Note: This product utilizes US Patent # 6,646,463 Impedance Emulator Patent issued to Alliance Semiconductor, dated 11-11-2003 © 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. 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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. Low Voltage Zero Delay Buffer Notice: The information in this document is subject to change without notice. 15 of 15