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| 5V/3.3V DUAL HIGH-PERFORMANCE PHASE LOCKED LOOP FEATURES s 3.3V and 5V power supply options s 1.12GHz maximum VCO frequency s 30MHz to 560MHz reference input operating frequency s External 2.0GHz VCO capability s Frequency doubler mode s Low jitter differential design s PECL differential outputs s External loop filter optimizes performance/cost s Available in 44-pin PLCC package ClockWorksTM SY89423V DESCRIPTION The SY89423V device consists of two identical, low jitter, digital Phase Locked Loops based on Micrel-Synergy's differential PLL technology. Each PLL is capable of operating in the 30MHz to 560MHz reference input frequency range, and is independent of the other, and is configurable separately. The PLLs can be configured to be matched in all regards, or can be configured so that PLLB is used as a frequency doubler, while PLLA is used to regenerate the undoubled frequency. Each PLL is capable of operating up to 2000MHz with the HFIN input and an external VCO. Two reference inputs (RINX and RINX), two feedback inputs (FINX and FINX), two high frequency inputs (HFINX and HFINX), two filter pins (F1X and F2X), two normal outputs (FOUTX and FOUTX), and two high frequency outputs (HFOUTX and HFOUTX) are provided for each of the two PLLs. The reference, feedback, and high frequency inputs can be used as either differential or single-ended inputs. External reference voltage generators are required for single-ended drive. Feedback for the loops is realized by connecting FOUTX, FOUTX to FINX, FINX by means of external circuitry. This allows the user the flexibility of inserting additional circuitry off-chip in the feedback paths, such as an additional divider. Pulldown resistors are required for the FOUTX and FOUTX pins, and for the HFOUTX and HFOUTX pins. Use of a phase-frequency detector in each PLL results in excellent locking and tracking characteristics. Error correction voltages are generated by the detector if either phase or frequency deviations occur. The VCO in each PLL has a frequency range covering more than a 2:1 ratio from 480MHz to 1120MHz. Select pins S1A, S2A, S1B, S2B, and S3B are used to program the N dividers for optimum VCO operation, in other words with the VCO operating in the center of its range. When both S3B and S5B are low, PLLB is identical to PLLA. When S5B is high, the 2X frequency multiplication option is enabled. Select pins S3A and S4B enable the HF inputs for PLLA and PLLB respectively, which allows the use of an external VCO in either PLL. All the select pins are TTL inputs. APPLICATIONS s Workstations s Advanced communications s High-performance computing PIN CONFIGURATION FOUTA FOUTA FOUTB FOUTB VCCOA VCCOB VCC VCC NC NC 6 NC HFOUTA HFOUTA S1A S2A F1A F2A S3A S5B HFINA HFINA 7 8 9 10 11 12 13 14 15 16 17 5 4 3 2 1 44 43 42 41 40 39 38 37 36 NC HFOUTB HFOUTB S1B S2B F1B F2B S3B S4B HFINB HFINB NC 35 34 33 32 31 30 29 FINB TOP VIEW PLCC J44-1 18 19 20 21 22 23 24 25 26 27 28 RINA RINA RINB RINB VEE VEE FINA FINA NC FINB Rev.: G Amendment: /0 1 Issue Date: May 2000 Micrel ClockWorksTM SY89423V BLOCK DIAGRAM /2 HFINA HFINA F1A F2A S3A RINA D RINA PHASE-FREQUENCY DETECTOR FINA D FINA S1A S2A LOOP FILTER 1 M U X VCO 0 HFOUTA HFOUTA / NA (2, 4, 8, 16) FOUTA FOUTA FOUTB FOUTB S1B S2B S3B / NB (1, 2, 4, 8, 10, 12, 16, 20) RINB D RINB PHASE-FREQUENCY DETECTOR S4B VCO 0 M U X HFOUTB HFOUTB FINB FINB /P (1, 2) LOOP FILTER 1 HFINB S5B F1B F2B /2 HFINB LOOP FILTER COMPONENT SELECTION R C = 1.0F 10% (X7R dielectric) = 560 10% C R F1X F2X 2 Micrel ClockWorksTM SY89423V PIN NAMES Pin F1A F2A RINA RINA FINA FINA HFINA HFINA FOUTA FOUTA HFOUTA HFOUTA F1B F2B RINB RINB FINB FINB HFINB HFINB FOUTB FOUTB HFOUTB HFOUTB VCC VCCOA VCCOB VEE S1A S2A S3A S1B S2B S3B S4B S5B Filter Pin 1A Filter Pin 2A Inverted Reference Input A Reference Input A Feedback Input A Inverted Feedback Input A High Frequency Input A Inverted High Frequency Input A Frequency Output A Inverted Frequency Output A High Frequency Output A Inverted High Frequency Output A Filter Pin 1B Filter Pin 2B Reference Input B Inverted Reference Input B Feedback Input B Inverted Feedback Input B High Frequency Input B Inverted High Frequency Input B Frequency Output B Inverted Frequency Output B High Frequency Output B Inverted Frequency Output B VCC Output VCC Output VCC VEE (0V) Select Input 1A (TTL) Select Input 2A (TTL) Select Input 3A (TTL) Select Input 1B (TTL) Select Input 2B (TTL) Select Input 3B (TTL) Select Input 4B (TTL) Select Input 5B (TTL) Function I/O I/O I/O I I I I I I O O O O I/O I/O I I I I I I O O O O -- -- -- -- I I I I I I I I PIN DESCRIPTION RINA, RINA, RINB, RINB Reference frequency inputs for loop A and B. These are differential signal pairs and may be driven differentially or single-ended. FINA, FINA, FINB, FINB Feedback frequency inputs for loop A and B. These are differential signal pairs and may be driven differentially or single-ended. HFINA, HFINA, HFINB, HFINB High frequency feedback inputs. Differential drive is recommended. F1A, F2A, F1B, F2B These pins are connection points for the loop filters, which are to be provided off-chip. F1X is the high impedance side, F2X is the reference side. The loop filter should be a first order, low pass with a DC block. The difference voltage on these pins will be a DC level, which is controlled by the loop feedback and determined by the required VCO frequency. FOUTA, FOUTA, FOUTB, FOUTB Frequency outputs for the loops. These are differential, positive referenced, emitter-follower signals and must be terminated off-chip. Termination in 50 ohms is recommended. HFOUTA, HFOUTA, HFOUTB, HFOUTB High frequency outputs. These are differential, positive referenced, emitter-follower signals and must be terminated off-chip. Termination in 50 ohms is recommended. S1A, S2A, S3A, S1B, S2B, S3B, S4B, S5B These inputs are used to select the configuration for PLLA and PLLB. See the Frequency Selection Table for details of the logic. VCC This is the positive supply for the chip. It should be decoupled and present a low impedance in order to assure low-jitter operation. VCCOA, VCCOB These are the positive supplies for the output buffers. They are constrained to be equal to or less than the value of VCC. VEE This pin is the negative supply for the chip and is normally connected to ground (0V). 3 Micrel ClockWorksTM SY89423V FREQUENCY SELECTION TABLE PLLA S3A 0 0 0 0 1 1 1 1 S2A 0 0 1 1 0 0 1 1 S1A 0 1 0 1 0 1 0 1 NA 2 4 8 16 2 4 8 16 FOUTA (MHz) 240 - 560 120 - 280 60 - 140 30 - 70 HFINA divide by 4 HFINA divide by 8 HFINA divide by 16 HFINA divide by 32 HFOUTA (MHz) 480 - 1120 480 - 1120 480 - 1120 480 - 1120 HFINA divide by 2 HFINA divide by 2 HFINA divide by 2 HFINA divide by 2 PLLB S4B 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 S3B 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 S2B 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 S1B 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 NB 2 4 8 16 1 10 12 20 2 4 8 16 1 10 12 20 FOUTB (MHz) 240 - 560 120 - 280 60 - 140 30 - 70 480 - 1120 48 - 112 40 - 93.3 24 - 56 HFINB divide by 4 HFINB divide by 8 HFINB divide by 16 HFINB divide by 32 HFINB divide by 2 HFINB divide by 20 HFINB divide by 24 HFINB divide by 40 HFOUTB (MHz) 480 - 1120 480 - 1120 480 - 1120 480 - 1120 480 - 1120 480 - 1120 480 - 1120 480 - 1120 HFINB divide by 2 HFINB divide by 2 HFINB divide by 2 HFINB divide by 2 HFINB divide by 2 HFINB divide by 2 HFINB divide by 2 HFINB divide by 2 S5B 0 1 Divide-by-P P=1 P=2 Maximum Feedback Frequency (MHz) 560 1120 4 Micrel ClockWorksTM SY89423V ABSOLUTE MAXIMUM RATINGS(1) Symbol VCC VI II IOUT Parameter Power Supply Voltage TTL Input Voltage TTL Input Current (2) Value -0.5 to +7.0 -0.5 to 6.0 -30 to +5.0 -Continuous -Surge 50 100 -65 to +150 Unit V V mA mA (2) ECL Output Current Tstore TA Storage Temperature Operating Temperature (3) C C 0 to +85 NOTES: 1. Permanent device damage may occur if ABSOLUTE MAXIMUM RATINGS are exceeded. This is a stress rating only and functional operation is not implied at conditions other than those detailed in the operational sections of this data sheet. Exposure to ABSOLUTE MAXIMUM RATING conditions for extended periods may affect device reliability. 2. Either voltage limit or current limit is sufficient to protect input. 3. All DC and AC electrical characteristics are specified over the operating temperature range. 5V DC ELECTRICAL CHARACTERISTICS VCC = VCCOA = VCCOB = 5.0V 5% Symbol VCC ICC ICCO Parameter Power Supply Voltage Power Supply Current (VCC) Power Supply Current (VCCO) Min. 4.75 -- -- Typ. -- -- -- Max. 5.25 200 56 Unit V mA mA PECL outputs are open Condition VCC = VCCO 3.3V DC ELECTRICAL CHARACTERISTICS VCC = VCCOA = VCCOB = 3.3V 5% Symbol VCC ICC ICCO Parameter Power Supply Voltage Power Supply Current (VCC) Power Supply Current (VCCO) Min. 3.135 -- -- Typ. -- -- -- Max. 3.465 200 56 Unit V mA mA PECL outputs are open Condition VCC = VCCO PECL DC ELECTRICAL CHARACTERISTICS VCC = VCCOA = VCCOB = 3.3V or 5.0V 5% Symbol VOH VOL VIH VIL Parameter Output HIGH Voltage Output LOW Voltage Input HIGH Voltage Input LOW Voltage Min. VCC - 1.025 VCC - 1.810 VCC - 1.165 VCC - 1.810 Typ. -- -- -- -- Max. VCC - 0.780 VCC - 1.520 VCC - 0.780 VCC - 1.475 Unit V V V V Condition 5 Micrel ClockWorksTM SY89423V TTL DC ELECTRICAL CHARACTERISTICS VCC = VCCOA = VCCOB = 3.3V or 5.0V 5% Symbol VIH VIL IIH IIL VIK Parameter Input HIGH Voltage Input LOW Voltage Input HIGH Current Input LOW Current Input Clamp Voltage Min. 2.0 -- -- -- -- Typ. -- -- -- -- -- Max. -- 0.8 20 100 -0.3 -1.2 Unit V V A mA V VIN = 2.7V VIN = VCC VIN = 0.5V IIN = -12mA Condition AC ELECTRICAL CHARACTERISTICS VCC = VCCOA = VCCOB = 3.3V or 5.0V 5% Symbol PPW tr tf RINA, B FINA, B FINB HFINA, B HFOUTA, B FOUTA FOUTB Parameter Output Period Jitter Output Duty Cycle Output Rise/Fall Time (20% to 80%) Reference Frequency Inputs Feedback Frequency Inputs Feedback Frequency Input High Frequency Inputs High Frequency Outputs Frequency Outputs PLLA Frequency Outputs PLLB Min. -- 45 -- -- -- -- -- -- -- -- -- Typ. 10 50 300 300 -- -- -- -- -- -- -- Max. 15 55 550 550 560 560 1120 2000 1120 560 1120 Unit ps rms % ps MHz MHz MHz MHz MHz MHz MHz S5B = 0 S5B = 1 -- Condition PRODUCT ORDERING CODE Ordering Code SY89423VJC SY89423VJCTR Package Type J44-1 J44-1 Operating Range Commercial Commercial 6 Micrel ClockWorksTM SY89423V 44 LEAD PLCC (J44-1) Rev. 02 7 Micrel ClockWorksTM SY89423V MICREL-SYNERGY TEL 3250 SCOTT BOULEVARD SANTA CLARA CA 95054 USA FAX + 1 (408) 980-9191 + 1 (408) 914-7878 WEB http://www.micrel.com This information is believed to be accurate and reliable, however no responsibility is assumed by Micrel for its use nor for any infringement of patents or other rights of third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent right of Micrel Inc. (c) 2000 Micrel Incorporated 8 |
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