SEMICONDUCTOR TECHNICAL DATA The MPC980 is a 3.3V dual PLL clock generator targeted for high end Pentium and PowerPC 603/604 personal computers. The MPC980 synthesizes processor as well as PCI clocks from a 14.31818MHz external crystal. In addition the device provides two buffered outputs of the 14.31818MHz crystal as well as a 40MHz SCSI clock, a 24MHz floppy clock and a 12MHz keyboard clock. One of the buffered 14.31818MHz outputs can be configured to provide a 16MHz output rather than the second copy of the 14.31818MHz output. DUAL 3.3V PLL CLOCK GENERATOR * Provides Processor and System Clocks for Pentium Designs * Provides Processor and System Clocks for PowerPC 603/604 Designs * Two Fully Integrated Phase-Locked Loops * Cycle-to-Cycle Jitter of 150ps * Operates from 3.3V Supply * 52-Lead LQFP Packaging The processor clock outputs of the MPC980 can be programmed to provide 50, 60 or 66MHz. Under all processor output frequencies the PCI clock outputs will be equal to one half the processor clock outputs. The PCI outputs will run synchronously to the processor clock outputs. There are a total of ten output clocks which can be split into a group of four and a group of six. Either group can be configured as processor or PCI clocks. Each of the outputs can drive two series terminated transmission lines allowing for the driving of up to twelve independent processor loads and eight PCI clock loads. A pin selectable option is available to delay the PCI clock outputs relative to the processor clocks. The amount of delay is a function of the processor clock frequency and varies from 2ns to 6ns. FA SUFFIX 52-LEAD LQFP PACKAGE CASE 848D-03 The output jitter of the the PLL at 66MHz output is 150ps peak-to-peak, cycle-to-cycle (the worst case deviation of the clock period is guaranteed to be less than 150ps). The skews between one processor clock and any other processor clock (or one PCI clock to any other PCI clock) is 350ps. The worst case skew between the processor clocks and the PCI clocks is 500ps. An output enable pin is provided to tristate all of the outputs for board level test. In addition a testing mode is provided to allow for the bypass of the PLL's for board level functional debug. Pentium is a trademark of Intel Corporation. PowerPC is a trademark of International Business Machines Corporation. 1/98 Motorola, Inc. 1998 1 REV 2 MPC980 fsel2 Dly_PCI fsel0:1 4 Processor Clock PLL Test Mode 2 2 /2 4 /4 14.31818MHz QP4:5_QPCI4:5 /2//4 TCLK_Sel Xtal Osc QP0:3 QPCI0:3 0 Q14.3M 1 0 TCLK Q14_16M 1 16M_Sel Q12M 16MHz 12MHz System Clock PLL Q24M 24MHz 40MHz Q40M OE Figure 1. Logic Diagram Table 1. Pin Descriptions Pin 1 Label VCCA Description Pin Analog VCC for System PLL Use Filter (Note 1.) GNDI System Ground Input VCCO VCC in for the CMOS Outputs 28 QP3 CMOS Output QP3 29 GND0 System Ground Input 30 GND0 System Ground Input 31 QP4_PCI4 CMOS Output QP4_PCI4 32 VCC0 VCC in for the CMOS Outputs 33 QP5_PCI5 CMOS Output QP5_PCI5 34 GND0 System Ground Input 35 GND0 System Ground Input (See Function Table 1 on page 3.) 36 QPCI3 CMOS Output QPCI3 Most Bit for QP/QPI Output Function 37 VCCO VCC in for the CMOS Outputs 38 QPCI2 CMOS Output QPCI2 39 GND0 System Ground Input 50K Sel Ext'l TCLK or Internal Xtal Ref 3 TCLK None External LVCMOS Ref Signal 4 Xtal1 None Xtal Pin 1 5 Xtal2 None Xtal Pin 2 6 GND 7 DLY_PCI System Ground Input Sets QP & QPI Relationship (See Function Table 2 on page 3.) 9 10 VCCI fsel0 fsel1 VCC Pin for Internal Circuits 50K 50K Least Bit for QP/QPI Output Funct (See Function Table 1 on page 3.) 11 fsel2 50K Selection of QP/QPI Output Funct (See Function Table 4 on page 3.) 12 VCCA 13 GNDA 14 16M_SEL 40 VCCI VCC for Internal Core Logic (Note 1.) 41 GND0 System Ground Input System Ground Input 42 QPCI1 CMOS Output QPCI1 Selects 16MHz / 14MHz for Q14_16M Output 43 VCC0 VCC in for the CMOS Outputs 44 QPCI0 CMOS Output QPCI0 45 GND0 System Ground Input 46 QM12 CMOS Output QM12 47 VCC0 VCC in for the CMOS Outputs 48 Q40M CMOS Output Q40M 49 GND0 System Ground Input 50 Q24M 51 OE Analog VCC Proc'ssr PLL Use Filter 50K 15 Q14_16M Output for 16MHz / 14MHz Xtal Osc 16 GND0 System Ground Input 17 VCC0 VCC in for the CMOS Outputs 18 Q14M CMOS Output for 14.3MHz Xtal Osc 19 GND0 System Ground Input 20 QP0 CMOS Output QP0 21 VCC0 VCC in for the CMOS Outputs 22 QP1 CMOS Output QP1 23 GND0 System Ground Input 24 QP2 CMOS Output QP2 25 VCC0 VCC in for the CMOS Outputs MOTOROLA Description 27 TCLK_Sel 8 26 2 50K Label CMOS Output Q24M 50K Select Output State (See Function Table 1 on page 3.) 52 GND0 System Ground Input 1. The filter recommended for the analog power pins is found in Figure 3 in the Applications Information section on page 5. 2 ECLinPS and ECLinPS Lite DL140 -- Rev 3 GND0 QPCI2 VCC0 QPCI3 GND0 GND0 QP5_PCI5 VCC0 QP4_PCI4 GND0 GND0 QP3 VCC0 MPC980 39 38 37 36 35 34 33 32 31 30 29 28 27 VCCI 40 26 GNDI GND0 41 25 VCC0 QPCI1 42 24 QP2 VCC0 43 23 GND0 QPCI0 44 22 QP1 GND0 45 21 VCC0 Q12M 46 20 QP0 VCC0 47 19 GND0 Q40M 48 18 Q14M GND0 49 17 VCC0 Q24M 50 16 GND0 OE 51 15 Q14_16M GNDA 52 14 16M_Sel Xtal2 9 10 11 12 13 GNDA Xtal1 8 VCCA TCLK 7 fsel2 TCLK_Sel 6 fsel1 5 fsel0 4 VCCI 3 Dly_PCI 2 GND 1 VCCA MPC980 Figure 2. 52-Lead Pinout (Top View) Function Table 1 OE fsel0 fsel1 QP QPCI Q14M Q16M Q24M Q12M Q40M 0 1 1 1 1 X 0 0 1 1 X 0 1 0 1 High Impedance 50MHz 60MHz 66MHz TCLK/2 High Impedance 25MHz 30MHz 33MHz TCLK/4 Hi Z 14.31818 14.31818 14.31818 TCLK Hi Z 16 16 16 TCLK/6 Hi Z 24 24 24 TCLK/4 Hi Z 12 12 12 TCLK/8 Hi Z 40 40 40 TCLK/2 Function Table 2 Dly_PCI 0 1 Function Table 4 QP/QPCI Relationship fsel2 Synchronous Processor & PCI Clocks PCI Clocks Lag Processor Clocks 0 1 Function Table 3 TCLK_Sel 0 1 Function Table 5 PLL Input Reference 16M_Sel Crystal Oscillator TCLK ECLinPS and ECLinPS Lite DL140 -- Rev 3 QP/QPCI Output Configuration 6 Processor and 4 PCI Clocks 4 Processor and 6 PCI Clocks 0 1 3 Q14_16M Output Configuration 14.31818MHz to Q14_16M Out 16MHz to Q14_16M Out MOTOROLA MPC980 DC CHARACTERISTICS (TA = 0 to 70C) Symbol Characteristic VCC Power Supply Voltage VIL Input LOW Voltage VIH Input HIGH Voltage VOH Output HIGH Voltage VOL Output LOW Voltage CIN Input Capacitance CPD Power Dissipation Capacitance ICC Quiescent Supply Current Min Typ Max Unit 3.3-5% 3.3 3.3+5% V 0.3VCC V VCC V 0.7VCC VCC -0.4 Condition V -20mA (Note 1.) 0.4 V +20mA (Note 1.) 4.5 pF 25 pF 190 mA ICCA PLL Supply Current 20 mA 1. Output can drive two series terminated 50 transmission lines or a single 50 line terminated 50 into VCC/2. AC CHARACTERISTICS (TA = 0 to 70C, VCC = 3.3V 5%) Symbol Characteristic Min fXtal Input Crystal Frequency fmax Maximum Output Frequency tdc Output Duty Cycle tjitter Cycle-to-Cycle Jitter (Peak-to-Peak) tskew Output-to-Output Skew tdelay Time Delay tr, tf Output Rise/Fall Time tLOCK PLL Lock Time tPZL, tPZH Output Enable Time 3 tPLZ, tPHZ Output Disable Time 4 Typ Max 14.31818 QP QPCI Unit Condition MHz 66 33 MHz tCYCLE/2 +1000 ps 66/33MHz 60/30MHz 50/25MHz 150 200 250 ps QP to QP QPCI to QPCI QP to QPCI 350 350 500 ps Rising Edges Only; Dly_PCI = 0 ns Dly_PCI = 1 0.8 ns 1.0 to 1.8V 10 ms 10 ns 50 to VCC/2 11 ns 50 to VCC/2 tCYCLE/2 -1000 QP to QPCI 2 tCYCLE/2 500 1 4fQP 0.05 1 4fQP )1 APPLICATIONS INFORMATION The Oscillator circuit is a series resonant circuit as opposed to the more common parallel resonant circuit, this eliminates the need for large on-board capacitors. Because the design is a series resonant design for the optimum frequency accuracy a series resonant crystal should be used (see specification table below). Unfortunately most off the shelf crystals are characterized in a parallel resonant mode. However a parallel resonant crystal is physically no different than a series resonant crystal, a parallel resonant crystal is simply a crystal which has been characterized in its parallel Using the On-Board Crystal Oscillator The MPC980 features an on-board crystal Oscillator to allow for seed clock generation as well as final distribution. The on-board Oscillator is completely self contained so that the only external component required is the crystal. As the Oscillator is somewhat sensitive to loading on its inputs the user is advised to mount the crystal as close to the MPC980 as possible to avoid any board level parasitics. To facilitate co-location surface mount crystals are recommended, but not required. MOTOROLA 4 ECLinPS and ECLinPS Lite DL140 -- Rev 3 MPC980 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. It is recommended that the user start with an 8-10 resistor to avoid potential VCC drop problems and only move to the higher value resistors when a higher level of attenuation is shown to be needed. resonant mode. Therefore in the majority of cases a parallel specified crystal can be used with the MPC980 with just a minor frequency error due to the actual series resonant frequency of the parallel resonant specified crystal. Typically a parallel specified crystal used in a series resonant mode will exhibit an Oscillatory frequency a few hundred ppm lower than the specified value. For most processor implementa- tions a few hundred ppm translates into kHz inaccuracies, a level which does not represent a major issue. Table 2. Crystal Specifications Parameter 3.3V Value Crystal Cut Fundamental at Cut Resonance Series Resonance* Frequency Tolerance 75ppm at 25C Frequency/Temperature Stability 150ppm 0 to 70C Operating Range 0 to 70C Shunt Capacitance 5-7pF Equivalent Series Resistance (ESR) 50 to 80 Max Correlation Drive Level 100W Aging 5ppm/Yr (First 3 Years) RS=5-15 PLL_VCC 22F MPC980 VCCA Pins 1 & 12 VCC 0.01F * See accompanying text for series versus parallel resonant discussion. Figure 3. Power Supply Filter Although the MPC980 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. Power Supply Filtering The MPC980 is a mixed analog/digital product and as such it exhibits some sensitivities 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 MPC980 provides separate power supplies for the output buffers (VCCO) and the phase-locked loop (VCCA) of the device. The purpose of this design technique is to try and 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 MPC980. Component Reliability Analysis Information All inputs and outputs of the MPC980 clock generator are LVCMOS and are not 5V tolerant. The quiescent current is 190mA maximum, so the maximum quiescent power is (190mA) x (3.465V max-VCC) = 658.35mW. Total maximum power must include the dynamic power of the outputs. Dynamic Power/Output = [Logic Swing Out (volts)] x [VCC (volts)] x [Freq (MHz)] x [Cl + Cp (pF)] Figure 3 illustrates a typical power supply filter scheme. The MPC980 is most susceptible to noise with spectral content in the 1KHz to 1MHz 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 MPC980. From the data sheet the IVCCA current (the current sourced per VCCA pin) is typically 15mA (20mA maximum), assuming that a minimum of 3.0V must be maintained on the VCCA pin very little DC voltage drop can be tolerated when a 3.3V VCC supply is used. The resistor shown in Figure 3 must have a resistance of 10-15 to meet the voltage drop criteria. The RC filter pictured will provide a broadband filter with approximately 100:1 attenuation for ECLinPS and ECLinPS Lite DL140 -- Rev 3 0.01F where CL = Load Capacitance CP = Output Power Dissipation Capacitance The MPC980 is packaged in a 52-lead LQFP to optimize board space and power supply distribution. The LQFP package occupies a 12mm x 12mm space on the PCB. The 52-Pin LQFP package has a JA of 64 to 74C/W in still air and a JA of 42 to 52C/W in 500lfpm of moving air. The maximum chip temperature for the device is 140C. The device component count is: NPN Bipolar devices 2,238; NMOS devices 1,313; PMOS devices 281. 5 MOTOROLA MPC980 OUTLINE DIMENSIONS FA SUFFIX PLASTIC LQFP PACKAGE CASE 848D-03 ISSUE D -X- X=L, M, N CL AB 4X 4X 13 TIPS 0.20 (0.008) H L-M N G AB 0.20 (0.008) T L-M N VIEW Y 52 40 1 39 3X PLATING VIEW Y -L- CCCC EEEE EEEE CCCC J -M- B V 0.13 (0.005) B1 13 M D T L-M U S N S SECTION AB-AB V1 ROTATED 90_ CLOCKWISE 27 14 26 -N- A1 S1 A S 4X C q2 0.10 (0.004) T -H- -T- SEATING PLANE 4X q3 VIEW AA 0.05 (0.002) S W 2X R q1 R1 0.25 (0.010) C2 q GAGE PLANE K C1 E VIEW AA MOTOROLA BASE METAL F Z 6 NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: MILLIMETER. 3. DATUM PLANE -H- IS LOCATED AT BOTTOM OF LEAD AND IS COINCIDENT WITH THE LEAD WHERE THE LEAD EXITS THE PLASTIC BODY AT THE BOTTOM OF THE PARTING LINE. 4. DATUMS -L-, -M- AND -N- TO BE DETERMINED AT DATUM PLANE -H-. 5. DIMENSIONS S AND V TO BE DETERMINED AT SEATING PLANE -T-. 6. DIMENSIONS A AND B DO NOT INCLUDE MOLD PROTRUSION. ALLOWABLE PROTRUSION IS 0.25 (0.010) PER SIDE. DIMENSIONS A AND B DO INCLUDE MOLD MISMATCH AND ARE DETERMINED AT DATUM PLANE -H-. 7. DIMENSION D DOES NOT INCLUDE DAMBAR PROTRUSION. DAMBAR PROTRUSION SHALL NOT CAUSE THE LEAD WIDTH TO EXCEED 0.46 (0.018). MINIMUM SPACE BETWEEN PROTRUSION AND ADJACENT LEAD OR PROTRUSION 0.07 (0.003). DIM A A1 B B1 C C1 C2 D E F G J K R1 S S1 U V V1 W Z 1 2 3 MILLIMETERS MIN MAX 10.00 BSC 5.00 BSC 10.00 BSC 5.00 BSC --- 1.70 0.05 0.20 1.30 1.50 0.20 0.40 0.45 0.75 0.22 0.35 0.65 BSC 0.07 0.20 0.50 REF 0.08 0.20 12.00 BSC 6.00 BSC 0.09 0.16 12.00 BSC 6.00 BSC 0.20 REF 1.00 REF 0_ 7_ --- 0_ 12 _ REF 12 _ REF INCHES MIN MAX 0.394 BSC 0.197 BSC 0.394 BSC 0.197 BSC --- 0.067 0.002 0.008 0.051 0.059 0.008 0.016 0.018 0.030 0.009 0.014 0.026 BSC 0.003 0.008 0.020 REF 0.003 0.008 0.472 BSC 0.236 BSC 0.004 0.006 0.472 BSC 0.236 BSC 0.008 REF 0.039 REF 0_ 7_ --- 0_ 12 _ REF 12 _ REF ECLinPS and ECLinPS Lite DL140 -- Rev 3 MPC980 Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages. "Typical" parameters which may be provided in Motorola data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including "Typicals" must be validated for each customer application by customer's technical experts. Motorola does not convey any license under its patent rights nor the rights of others. Motorola products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the Motorola product could create a situation where personal injury or death may occur. Should Buyer purchase or use Motorola products for any such unintended or unauthorized application, Buyer shall indemnify and hold Motorola and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that Motorola was negligent regarding the design or manufacture of the part. Motorola and are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal Opportunity/Affirmative Action Employer. Mfax is a trademark of Motorola, Inc. How to reach us: USA / EUROPE / Locations Not Listed: Motorola Literature Distribution; P.O. Box 5405, Denver, Colorado 80217. 1-303-675-2140 or 1-800-441-2447 JAPAN: Nippon Motorola Ltd.: SPD, Strategic Planning Office, 141, 4-32-1 Nishi-Gotanda, Shagawa-ku, Tokyo, Japan. 03-5487-8488 Customer Focus Center: 1-800-521-6274 Mfax: RMFAX0@email.sps.mot.com - TOUCHTONE 1-602-244-6609 ASIA/PACIFIC: Motorola Semiconductors H.K. Ltd.; 8B Tai Ping Industrial Park, Motorola Fax Back System - US & Canada ONLY 1-800-774-1848 51 Ting Kok Road, Tai Po, N.T., Hong Kong. 852-26629298 - http://sps.motorola.com/mfax/ HOME PAGE: http://motorola.com/sps/ ECLinPS and ECLinPS Lite DL140 -- Rev 3 7 MPC980/D MOTOROLA