PLL702-01 Clock Generator for PowerPC Based Applications FEATURES • • • • • • • 1 CPU Clock output with selectable frequencies (50, 66, 75, 80, 83, 90, 100,125 or 133 MHz). 1 ASIC output clock (at CPU clock or CPU clock ÷ 2). 2 ASIC output clocks (at CPU clock) w/ output enable. 1 PCI output clock w/ output enable 1 Selectable 48, 30 or 12MHz (USB) output. Selectable Spread Spectrum (SST) for EMI reduction on ASIC and CPU. PowerPC compatible output and drive CPU Clock. Selectable reduced 67% drive strength on CPU Clock Advanced, low power, sub-micron CMOS processes. 14.31818MHz fundamental crystal input. 3.3V and/or 2.5V operation. Available in 28-Pin 209mil SSOP (QSOP). 1 28 CLK_SEL0T 2 27 CLK_SEL1T XOUT / ASIC2_OE*^ 3 26 SSCO^ VDD_ANA 4 25 SSC1^ VDD_DIG 5 24 GND_ANA VDD_PC I 6 23 GND_CPU PCI / PCI_SEL*T 7 22 CP U o GND_PCI 8 21 VDD_CPU GND_USB 9 20 VDD_ASIC1 VDD_USB 10 19 ASIC1 USB / USB_SEL*T 11 18 GND_ASIC1 VDD_ASIC2 12 17 ASIC1_SEL^ ASIC2 A 13 16 GND_DIG ASIC2 B 14 15 GND_ASIC2 CPUDRV_SEL^ XIN Note : PLL702-01 • • • • • PIN ASSIGNMENT (28 pin SSOP) ^: Internal pull-up resistor Selectable reduced drive strength o: *: Bi-directional pin T: Tri-level input FREQUENCY TABLES DESCRIPTION CLK_SEL1 The PLL702-01 is a low cost, low jitter, and high performance clock synthesizer for generic PowerPC based applications. It provides one CPU clock, three ASIC outputs, one PCI output, and a selectable 48, 30 or 12MHz (USB) output. The user can choose between 9 different CPU clock frequencies, while the ASIC output can be identical or half of the CPU frequency. Low EMI Spread Spectrum Technology is available for the CPU, ASIC and PCI clocks. The CPU drive strength is user selectable from 100% to 67%. All frequencies are generated from a single low cost 14.31818MHz crystal. The CPU and ASIC clock can be driven from an independent 2.5V power supply. CLK_SEL0 CPU (MHz) ASIC1 (MHz) ASIC1_SEL =1 ASIC1_SEL =0 ASIC2 (MHz) PCI* (MHz) PCI_SEL =0 PCI_SEL =M 0 0 50 50 25 50 62.5 31.25 0 M 66 66 33 66 66.7 33.35 0 1 75 75 37.5 75 62.5 31.25 M 0 80 80 40 80 66.7 33.35 M M 83 83 41.5 83 66.7 33.35 M 1 90 90 45 90 66.7 33.35 1 0 100 100 50 100 66.7 33.35 1 M 125 125 62.5 125 62.5 31.25 1 1 133 133 66.5 133 65.5 32.75 Notes: When CPU=90MHz, it implements 88.88MHz to meet PCI=33.3MHz/66.6MHz; When CPU=133MHz, it implements 130.9MHz to meet Power PC clock AC Timing Specification. * PCI_SEL=1 sets the Tri-state (output disabled) mode of the output. BLOCK DIAGRAM Control USB_SEL Logic USB PLL CPU_CLK XIN XOUT SSC(0:1) CLK_SEL(0:1) ASIC1_SEL PCI_SEL XTAL PLL SST DIV 2 ASIC1 ASIC2(A:B) ASIC2_OE OSC PCI PCI_OE Control Logic 47745 Fremont Blvd., Fremont, California 94538 Tel (510) 492-0990 Fax (510) 492-0991 www.phaselink.com Rev 07/18/05 Page 1 PLL702-01 Clock Generator for PowerPC Based Applications PIN DESCRIPTIONS Name Number Type CPUDRV_SEL 1 I XIN 2 I XOUT/ ASIC2_OE 3 B VDD_ANA / GND_ANA VDD_DIG / GND_DIG 4, 5, 16, 24 6, 8, 9, 10, 12, 15, 18, 20, 21, 23 VDD_xxx / GND_xxx for USB, CPU, PCI, ASIC1 and ASIC2 Description CPU drive strength selector pin. The CPU drive strength can be set to 67% of nominal strength with CPUDRV_SEL = 0. When CPUDRV_SEL = 1, the CPU drive strength will be 100% of the nominal strength. Internal pull-up of 60kΩ. 0=connect to GND, 1=leave open. Crystal input to be connected to a 14.31818MHz fundamental crystal (CL = 20pF, parallel resonant mode). Load capacitors have been integrated on the chip. No external Load capacitor is required. Bi-directional pin. Upon power-on, the value of ASIC2_OE is latched in and used to enable / disable the ASIC2A and ASIC2B outputs (outputs are enabled if ASIC2_OE=1, otherwise, outputs are in tri-state). Internal pull-up of 120 kΩ. After the input has been latched-in, the pin serves as Crystal connection. P 3.3V power supply and GND. P CPU, PCI, ASIC1 and ASIC2 outputs have separate power supply pins (VDD and GND). VDD_CPU, VDD_ASIC1 and VDD_ASIC2 can accept 3.3V and/or 2.5V power supply. Other VDD pins are to be supplied 3.3V PCI / PCI_SEL 7 B USB / USB_SEL 11 B ASIC2A and ASIC2B 13, 14 O ASIC1_SEL 17 I ASIC1 19 O CPU 22 O SSC(0:1) 25, 26 I CLK_SEL(0:1) 27, 28 I Bi-directional pin. Upon power-on, the value of PCI_SEL is latched in and used to select the PCI clock output (see frequency table on p.1). PCI output is disabled (tri-state) when PCI_SEL=1. PCI clock will be 33MHz (min. 31.25MHz) if PCI_SEL=M (not connected), and 66MHz (min. 62.5MHz) if PCI_SEL=0. 0=15kΩ to GND, M=leave open, 1=15kΩ to VDD_PCI Bi-directional pin. Upon power-on, the value of USB_SEL is latched in and used to select the USB output (see USB selection table on page 3). After the input has been latched-in, the pin serves as USB (48, 30 or 12 MHz) output. 0=15kΩ to GND, M=leave open, 1=15kΩ to VDD_USB ASIC clock signal output pins. ASIC2A and ASIC2B will have the same frequency as CPU. These outputs can be disabled through ASIC2_OE. ASIC1 frequency select input pin (see also frequency table on p.1). ASIC1 will have the same frequency as CPU if ASIC1_SEL = 1, and have half of CPU if ASIC_SEL = 0. Internal pull-up of 60 kΩ. 0=connect to GND, 1=leave open ASIC1 output pin (see frequency table on p.1 and ASIC1_SEL pin description). CPU clock signal output pin. The CPU clock frequency is selected as per the frequency table on page 1, depending on the value of CLK_SEL(0:1). Selectable drive strength through CPUDRV_SEL. Bi-level input with Pull-up for SST control (see Spread Spectrum selection table on p.3). 0=connect to GND, 1=leave open. Tri-level inputs for CPU clock frequency selection (see table on p.1). 0=connect to GND, M=not connected, 1=connect to VDD_ANA. 47745 Fremont Blvd., Fremont, California 94538 Tel (510) 492-0990 Fax (510) 492-0991 www.phaselink.com Rev 07/18/05 Page 2 PLL702-01 Clock Generator for PowerPC Based Applications USB OUTPUT FREQUENCY AND CPU DRIVE STRENGTH SELECTION TABLES USB_SEL USB CPUDRV_SEL CPU drive strength 0 48 MHz 0 67% (reduced) M 30 MHz 1 100% (nominal) 1 12 MHz SPREAD SPECTRUM SELECTION TABLE SSC1 SSC0 Spread Spectrum Modulation 0 0 OFF 0 1 - 0.50% – Downspread 1 0 - 1.00% – Downspread 1 1 - 1.25% – Downspread FUNCTIONAL DESCRIPTION Tri-level and two-level inputs In order to reduce pin usage, the PLL702-01 uses tri-level input pins. These pins allow 3 levels for input selection: namely, 0 = Connect to GND, 1 = Connect to VDD, M = Do not connect. Thus, unlike the two-level selection pins, the tri-level input pins are in the “M” (mid) state when not connected. In order to connect a tri-level pin to a logical “zero”, the pin must be connected to GND. Likewise, in order to connect to a logical “one”, the pin must be connected to VDD. Connecting a bi-directional pin The PLL702-01 also uses bi-directional pins. The same pin serves as input upon power-up, and as output as soon as the inputs have been latched. The value of the input is latched-in upon power-up. Depending on the pin (see pin description), the input can be tri-level or a standard two-level. Unlike unidirectional pins, bi-directional pins cannot be connected directly to GND or VDD in order to set the input to "0" or "1", since the pin also needs to serve as output. In the case of two level input pins, an internal pullup resistor is present. This allows a default value to be set when no external pull down resistor is connected between the pin and GND (by definition, a tri-level input has a the default value of "M" (mid) if it is not connected). In order to connect a bidirectional pin to a non-default value, the input must be connected to GND or VDD through an external pull-down/pull-up resistor. Note: when the output load presents a low impedance in comparison to the internal pull-up resistor, the internal pull-up resistor may not be sufficient to pull the input up to a logical “one”, and an external pull-up resistor may be required. For bi-directional inputs, the external loading resistor between the pin and GND has to be sufficiently small (compared to the internal pull-up resistor) so that the pin voltage be pulled below 0.8V (logical “zero”). In order to avoid loading effects when the pin serves as output, the value of the external pull-down resistor should however be kept as large as possible. In general, it is recommended to use an external resistor of around one sixth to one quarter of the internal pull-up resistor (see Application Diagram). Note: when the output is used to drive a load presenting an small resistance between the output pin and VDD, this resistance is in essence connected in parallel to the internal pull-up resistor. In such a case, the external pull-down resistor may have to be dimensioned smaller to guarantee that the pin voltage will be low enough achieve the desired logical “zero”. This is particularly true when driving 74FXX TTL components. 47745 Fremont Blvd., Fremont, California 94538 Tel (510) 492-0990 Fax (510) 492-0991 www.phaselink.com Rev 07/18/05 Page 3 PLL702-01 Clock Generator for PowerPC Based Applications APPLICATION DIAGRAM: BI-DIRECTIONAL PINS WITH INTERNAL PULL-UP Internal to chip External Circuitry VDD Rup Power Up Reset Output Latched Input Latch R RB EN Bi-directional pin Clock Load RUP/4 Jumper options NOTE: Rup=Internal pull-up resistor (see pin description). Power-up Reset : R starts from 1 to 0 while RB starts from 0 to 1. 47745 Fremont Blvd., Fremont, California 94538 Tel (510) 492-0990 Fax (510) 492-0991 www.phaselink.com Rev 07/18/05 Page 4 PLL702-01 Clock Generator for PowerPC Based Applications VDD Power Up Ramp requirements: At startup, the chip reads a lot of settings for operation according to the application’s requirements. Since reading the settings is done only at startup and then frozen for the time of operation, it is important that the power-up environment is somewhat controlled to facilitate proper reading of the settings. The important VDD pins are VDD_ANA and VDD_DIG and they should apply to the following two-startup requirements: 1. VDD_DIG should be equally fast or slower than VDD_ANA. VDD_DIG performs a chip reset when VDD has reached a certain level and VDD_ANA should have reached at least up to the same level as well to properly process the reset. 2. The VDD Power Up Ramp of VDD_DIG and VDD_ANA should pass through the section 1.8V to 2.5V no faster than 100µs and with a continuously increasing slope. In this section the tri-level select inputs are read. 3. After VDD Power off, VDD should be allowed to go to 0V and stay there for at least 1ms before a new VDD Power on. It is important that proper preconditions exist at every startup. Remaining charges in the chip or in circuit filter capacitors may interfere with the preconditions so it is important that VDD has been at 0V for some time before each startup. VDD off 3.3V 2.97V 2.5V 2.2V 1.8V VDD on GND (0V) No limit Min 1ms >100us Reset enable Min 1s Reset disable 47745 Fremont Blvd., Fremont, California 94538 Tel (510) 492-0990 Fax (510) 492-0991 www.phaselink.com Rev 07/18/05 Page 5 PLL702-01 Clock Generator for PowerPC Based Applications Electrical Specifications 1. Absolute Maximum Ratings PARAMETERS SYMBOL Supply Voltage Input Voltage, dc Output Voltage, dc Storage Temperature Ambient Operating Temperature* Junction Temperature Lead Temperature (soldering, 10s) ESD Protection, Human Body Model MIN. V DD VI VO TS TA TJ -0.5 -0.5 -65 -40 MAX. UNITS 4.6 V DD +0.5 V DD +0.5 150 85 125 260 2 V V V °C °C °C °C kV Exposure of the device under conditions beyond the limits specified by Maximum Ratings for extended periods may cause permanent damage to the device and affect product reliability. These conditions represent a stress rating only, and functional operations of the device at these or any other conditions above the operational limits noted in this specification is not implied. * Note: Operating Temperature is guaranteed by design for all parts (COMMERCIAL and INDUSTRIAL), but tested for COMMERCIAL grade only. 2. AC Specifications PARAMETERS Crystal Input Frequency SST modulation sweep rate Output Rise Time Output Fall Time Duty Cycle Max. output skew CPU and ASIC1 Max. output skew CPU and ASIC2 Max. Absolute Period Jitter Max. Jitter, cycle to cycle CONDITIONS MIN. TYP. MAX. UNITS 50 1.5 1.5 55 MHz kHz ns ns % 500 750 ps 200 250 ps 150 120 ps ps 14.31818 28 0.8V to 2.0V with no load 2.0V to 0.8V with no load At VDD/2 Equal loading (20 pF) Equal frequency & drive strength Equal Power Supply for both ASIC and CPU Equal loading (20 pF) Equal frequency & drive strength Equal Power Supply for both ASIC and CPU Long term, No SST Long term + Short term 47745 Fremont Blvd., Fremont, California 94538 Tel (510) 492-0990 Fax (510) 492-0991 45 www.phaselink.com Rev 07/18/05 Page 6 PLL702-01 Clock Generator for PowerPC Based Applications 3. DC Specifications PARAMETERS Operating Voltage Input Input Input Input Input Input High Voltage Low Voltage High Voltage Low Voltage High Voltage Low Voltage SYMBOL VDD_ANA VDD_DIG VDD_USB VDD_PCI VDD_ASIC1 VDD_ASIC2 VDD_CPU V IH V IL V IH V IL V IH V IL CONDITIONS MIN. Nominal voltage is 3.3V MAX. UNITS 2.97 3.63 V Nominal voltage is 2.5V 2.25 2.75 V Nominal voltage is 3.3V 2.97 3.63 V VDD/2 VDD/2 Output High Voltage V OH Output Low Voltage Output High Voltage At CMOS Level Nominal Output Current Operating Supply Current Short-circuit Current V OL For all Tri-level input For all Tri-level input For all normal input For all normal input I OH = -25mA VDD = 3.3V I OL = 25mA V OH I OH = -8mA I out I DD IS TYP. VDD/2 - 1 V V V V V V VDD-0.5 VDD-0.4 V 25 mA mA mA 0.5 2 0.8 2.4 V 0.4 No Load 35 ±100 V 4. Crystal Specifications PARAMETERS Crystal Resonator Frequency Crystal Loading Rating Recommended ESR SYMBOL CONDITIONS F XIN C L (xtal) RE Parallel Fundamental Mode MIN. TYP. MAX. 14.31818 21 AT cut UNITS MHz pF 30 Ω Note: A detailed crystal specification document is also available for this part. 47745 Fremont Blvd., Fremont, California 94538 Tel (510) 492-0990 Fax (510) 492-0991 www.phaselink.com Rev 07/18/05 Page 7 PLL702-01 Clock Generator for PowerPC Based Applications PACKAGE INFORMATION Package SSOP (QSOP) 209mil Pins# E 28 E1 inches mm Unit min A e B D C max min max 0.079 2.0 A1 0.05 B 0.25 0.38 0.01 0.015 C 0.09 0.25 0.004 0.010 D 9.9 10.5 0.390 0.413 E 7.40 8.20 0.291 0.323 E1 5.00 5.60 0.197 0.220 0.002 A A1 L e 28PIN SSOP L 0.0256BSC 0.65BSC 0.55 0.95 0.022 0.038 ORDERING INFORMATION For part ordering, please contact our Sales Department: 47745 Fremont Blvd., Fremont, CA 94538, USA Tel: (510) 492-0990 Fax: (510) 492-0991 PART NUMBER The order number for this device is a combination of the following: Device number, Package type and Operating temperature range PLL702-01 X X X X NONE= TUBE R=TAPE AND REEL PART NUMBER NONE=NORMAL PACKAGE L=GREEN PACKAGE PACKAGE TYPE X=SSOP Part / Order Number PLL702-01XC-R PLL702-01XC PLL702-01XCLR PLL702-01XCL TEMPERATURE C=COMMERCIAL, I=INDUSTRIAL Marking P702-01XC P702-01XC P702-01XCL P702-01XCL Package Option SSOP SSOP SSOP SSOP -Tape and Reel -Tubes -Tape and Reel -Tubes Temperature 0 to +70ﾟC 0 to +70ﾟC 0 to +70ﾟC 0 to +70ﾟC PhaseLink Corporation, reserves the right to make changes in its products or specifications, or both at any time without notice. The information furnished by Phaselink is believed to be accurate and reliable. However, PhaseLink makes no guarantee or warranty concerning the accuracy of said information and shall not be responsible for any loss or damage of whatever nature resulting from the use of, or reliance upon this product. LIFE SUPPORT POLICY: PhaseLink’s products are not authorized for use as critical components in life support devices or systems without the express written approval of the President of PhaseLink Corporation. 47745 Fremont Blvd., Fremont, California 94538 TEL (510) 492-0990 FAX (510) 492-0991 Rev 07/18/05 Page 8