 |
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
| Datasheet File OCR Text: |
| CY22381 Three-PLL General Purpose FLASH Programmable Clock Generator Features * Three integrated phase-locked loops * Ultra-wide divide counters (eight-bit Q, eleven-bit P, and seven-bit post divide) * Improved linear crystal load capacitors * Flash programmability * Field programmability * Low-jitter, high-accuracy outputs * Power-management options (Shutdown, OE, Suspend) * Configurable crystal drive strength * Frequency select option via external LVTTL Input * 3.3V operation * Eight-pin SOIC package * CyClocks RTTM support * Non-volatile programming enables easy customization, ultra-fast turnaround, performance tweaking, design timing margin testing, inventory control, lower part count, and more secure product supply. Can also be programmed multiple times which reduces programming errors and provides an easy upgrade path for existing designs * In-house programming of samples and prototype quantities is available using the CY3672 FTG development Kit. Production quantities are available through Cypress's value-added distribution partners or by using third party programmers from BP Microsystems, HiLo Systems, and others. * Performance suitable for high-end multimedia, communications, industrial, A/D converters, and consumer applications * Supports numerous low-power application schemes and reduces EMI by allowing unused outputs to be turned off * Adjust crystal drive strength for compatibility with virtually all crystals * External frequency select option for PLL1, CLKA, and CLKB * Industry standard supply voltage * Industry standard packaging saves on board space * Easy-to-use software support for design entry Benefits * Generates up to three unique frequencies on three outputs up to 200 MHz from an external source. Functional upgrade for current CY2081 family. * Allows for 0 ppm frequency generation and frequency conversion under the most demanding applications * Improves frequency accuracy over temperature, age, process, and initial offset Logic Block Diagram XTALIN XTALOUT OSC. PLL1 CONFIGURATION FLASH 11-BIT P 8-BIT Q 4x3 Crosspoint Switch Divider 7-BIT CLKC PLL2 SHUTDOWN/OE FS/SUSPEND 11-BIT P 8-BIT Q Divider 7-BIT CLKB PLL3 11-BIT P 8-BIT Q Divider 7-BIT CLKA Cypress Semiconductor Corporation Document #: 38-07012 Rev. *D * 3901 North First Street * San Jose, CA 95134 * 408-943-2600 Revised October 13, 2004 CY22381 Pin Configuration CY22381 8-pin SOIC CLKC GND XTALIN XTALOUT 1 2 3 4 8 7 6 5 FS/SUSPEND/OE/SHUTDOWN VDD CLKA CLKB Selector Guide Part Number CY22381FC CY22381FI Outputs 3 3 Input Frequency Range Output Frequency Range Specifics Commercial Temperature Industrial Temperature 8 MHz - 30 MHz (external crystal) Up to 200 MHz 1 MHz - 166 MHz (reference clock) 8 MHz - 30 MHz (external crystal) Up to 166 MHz 1 MHz - 150 MHz (reference clock) Pin Summary Name CLKC GND XTALIN XTALOUT CLKB CLKA VDD FS/SUSPEND/ OE/SHUTDOWN Pin Number 1 2 3 4 5 6 7 8 Description Configurable clock output C Ground Reference crystal input or external reference clock input Reference crystal feedback (float if XTALIN is driven by external reference clock) Configurable clock output B Configurable clock output A Power supply General Purpose Input. Can be Frequency Control, Suspend mode control, Output Enable, or full-chip shutdown. General-Purpose Input The CY22381 features an output control pin (pin 8) that can be programmed to control one of four features. When programmed as a Frequency Select (FS), the input can select between two arbitrarily programmed frequency settings. The Frequency Select can change the following; the frequency of PLL1, the output divider of CLKB, and the output divider of CLKA. Any divider change as a result of switching the FS input is guaranteed to be glitch free. The general-purpose input can simultaneously control the Suspend feature, turning off a set of PLLs and outputs determined during programming. When programmed as an Output Enable (OE) the input forces all outputs to be placed in a three-state condition when LOW. When programmed as a Shutdown, the input forces a full chip shutdown mode when LOW. Crystal Input The input crystal oscillator is an important feature of this device because of its flexibility and performance features. The oscillator inverter has programmable drive strength. This allows for maximum compatibility with crystals from various manufacturers, processes, performances, and qualities. The input load capacitors are placed on-die to reduce external component cost. These capacitors are true parallel-plate capacitors for ultra-linear performance. These were chosen to reduce the frequency shift that occurs when non-linear load Page 2 of 8 Operation The CY22381 is an upgrade to the existing CY2081. The new device has a wider frequency range, greater flexibility, improved performance, and incorporates many features that reduce PLL sensitivity to external system issues. The device has three PLLs that allow each output to operate at an independent frequencies. These three PLLs are completely programmable. Configurable PLLs PLL1 generates a frequency that is equal to the reference divided by an eight-bit divider (Q) and multiplied by an 11-bit divider in the PLL feedback loop (P). The output of PLL1 is sent to the crosspoint switch. The frequency of PLL1 can optionally be changed by using the external CMOS general purpose input. See the following section on "General-Purpose Input" for more detail. PLL2 generates a frequency that is equal to the reference divided by an eight-bit divider (Q) and multiplied by an 11-bit divider in the PLL feedback loop (P). The output of PLL2 is sent to the crosspoint switch. PLL3 generates a frequency that is equal to the reference divided by an eight-bit divider (Q) and multiplied by an 11-bit divider in the PLL feedback loop (P). The output of PLL3 is sent to the cross-point switch. Document #: 38-07012 Rev. *D CY22381 capacitance interacts with load, bias, supply, and temperature changes. Non-linear (FET gate) crystal load capacitors should not be used for MPEG, POTS dial tone, communications, or other applications that are sensitive to absolute frequency requirements. The value of the load capacitors is determined by six bits in a programmable register. The load capacitance can be set with a resolution of 0.375 pF for a total crystal load range of 6 pF to 30 pF. For driven clock inputs the input load capacitors may be completely bypassed. This enables the clock chip to accept driven frequency inputs up to 166 MHz. If the application requires a driven input, then XTALOUT must be left floating. Output Configuration Under normal operation there are four internal frequency sources that may be routed via a programmable crosspoint switch to any of the three outputs via programmable seven-bit output dividers. The four sources are: reference, PLL1, PLL2, and PLL3. The following is a description of each output. CLKA's output originates from the crosspoint switch and goes through a programmable seven-bit post divider. The seven-bit post divider derives its value from one of two programmable registers controlled by FS. CLKB's output originates from the crosspoint switch and goes through a programmable seven-bit post divider. The seven-bit post divider derives its value from one of two programmable registers controlled by FS. CLKC's output originates from the crosspoint switch and goes through a programmable seven-bit post divider. The seven-bit post divider derives its value from one programmable register. The Clock outputs have been designed to drive a single point load with a total lumped load capacitance of 15 pF. While driving multiple loads is possible with the proper termination, it is generally not recommended. Power-Saving Features When configured as OE, the general-purpose input three-states all outputs when pulled LOW. When configured as Shutdown, a LOW on this pin three-states all outputs and shuts off the PLLs, counters, the reference oscillator, and all other active components. The resulting current on the VDD pins will be less than 5 A (typical). After leaving shutdown mode, the PLLs will have to relock. When configured as SUSPEND, the general-purpose input can be configured to shut down a customizable set of outputs and/or PLLs, when LOW. All PLLs and any of the outputs can be shut off in nearly any combination. The only limitation is that if a PLL is shut off, all outputs derived from it must also be shut off. Suspending a PLL shuts off all associated logic, while suspending an output forces a three-state condition. Improving Jitter Jitter Optimization Control is useful in mitigating problems related to similar clocks switching at the same moment and causing excess jitter. If one PLL is driving more than one output, the negative phase of the PLL can be selected for one of the outputs. This prevents the output edges from aligning, allowing superior jitter performance. CyClocks RT Software CyClocks RT is our second-generation application that allows users to configure this device. The easy-to-use interface offers complete control of the many features of this family including input frequency, PLL and output frequencies, and different functional options. Data sheet frequency range limitations are checked and performance tuning is automatically applied. You can download a free copy of CyClocks RT on Cypress's web site at http://www.cypress.com. Document #: 38-07012 Rev. *D Page 3 of 8 CY22381 Maximum Ratings (Above which the useful life may be impaired. For user guidelines, not tested.) Supply Voltage ............................................... -0.5V to +7.0V DC Input Voltage.............................. -0.5V to + (VDD + 0.5V) Storage Temperature .................................. -65C to +125C Junction Temperature .................................................. 125C Data Retention @ Tj = 125C................................> 10 years Maximum Programming Cycles........................................100 Package Power Dissipation...................................... 250 mW Static Discharge Voltage (per MIL-STD-883, Method 3015) ........................... 2000V Latch up (per JEDEC 17) .................................... 200 mA Operating Conditions[1] Parameter VDD TA CLOAD_OUT fREF Supply Voltage Commercial Operating Temperature, Ambient Industrial Operating Temperature, Ambient Max. Load Capacitance External Reference Crystal External Reference Clock[2], Commercial External Reference tPU Clock[2], Industrial Power-up time for all VDD's to reach minimum specified voltage (power ramps must be monotonic) Description Min. 3.135 0 -40 - 8 1 1 0.05 Typ. 3.3 - - - - - - - Max. 3.465 +70 +85 15 30 166 150 500 Unit V C C pF MHz MHz MHz ms Electrical Characteristics Parameter IOH IOL CXTAL_MIN CXTAL_MAX CIN VIH VIL IIH IIL IOZ IDD IDDS Description Output High Current[3] Output Low Current[3] Capacitance[3] Crystal Load Capacitance[3] Crystal Load Input Pin Capacitance[3] HIGH-level Input Voltage LOW-level Input Voltage Input HIGH Current Input LOW Current Output Leakage Current Total Power Supply Current Conditions VOH = VDD - 0.5, VDD = 3.3 V VOL = 0.5V, VDD = 3.3 V Capload at minimum setting Capload at maximum setting Except crystal pins CMOS levels,% of VDD CMOS levels,% of VDD VIN = VDD - 0.3 V VIN = +0.3 V Three-state outputs 3.3 V Power Supply; 3 outputs @ 50 MHz 3.3 V Power Supply; 3 outputs @ 166 MHz Total Power Supply Current in Shut-down active Shutdown Mode Min. 12 12 - - - 70% - - - - - - - Typ. 24 24 6 30 7 - - <1 <1 - 35 70 5 Max. - - - - - - 30% 10 10 10 - - 20 Unit mA mA pF pF pF VDD VDD A A A mA mA A Notes: 1. Unless otherwise noted, Electrical and Switching Characteristics are guaranteed across these operating conditions. 2. External input reference clock must have a duty cycle between 40% and 60%, measured at VDD/2. 3. Guaranteed by design, not 100% tested. Document #: 38-07012 Rev. *D Page 4 of 8 CY22381 Switching Characteristics Parameter 1/t1 t2 Name Output Frequency [3, 4] Description Clock output limit, Commercial Clock output limit, Industrial Duty cycle for outputs, defined as t2 / t1, Fout < 100 MHz, divider >= 2, measured at VDD/2 Duty cycle for outputs, defined as t2 / t1, Fout > 100 MHz or divider = 1, measured at VDD/2 Min. - - 45% Typ. - - 50% Max. 200 166 55% Unit MHz MHz Output Duty Cycle[3, 5] 40% 50% 60% t3 t4 t5 t6 t7 Rising Edge Slew Rate[3] Falling Edge Slew Rate[3] Output Three-state Clock Jitter[3, 6] Lock Time[3] Timing[3] Output clock rise time, 20% to 80% of VDD Output clock fall time, 20% to 80% of VDD Time for output to enter or leave three-state mode after SHUTDOWN/OE switches Peak-to-peak period jitter, CLK outputs measured at VDD/2 PLL Lock Time from Power-up 0.75 0.75 - 1.4 1.4 150 - - 300 V/ns V/ns ns - - 200 1.0 - 3 ps ms Switching Waveforms All Outputs, Duty Cycle and Rise/Fall Time t1 t2 OUTPUT t3 t4 Output Three-State Timing OE t5 ALL THREE-STATE OUTPUTS t5 CLK Output Jitter t6 CLK OUTPUT Notes: 4. Guaranteed to meet 20% - 80% output thresholds and duty cycle specifications. 5. Reference Output duty cycle depends on XTALIN duty cycle. 6. Jitter varies significantly with configuration. Reference Output jitter depends on XTALIN jitter and edge rate. Document #: 38-07012 Rev. *D Page 5 of 8 CY22381 Switching Waveforms (continued) Frequency Change SELECT OLD SELECT Fold OUTPUT NEW SELECT STABLE t7 Fnew Test Circuit VDD 0.1 mF OUTPUTS CLKout CLOAD GND Ordering Information Ordering Code CY22381FC CY22381FCT CY22381FI CY22381FIT CY22381SC-xxx[7] CY22381SC-xxxT[7] CY22381SI-xxx[7] CY22381SI-xxxT[7] CY3672 Lead-Free CY22381FXC CY22381FXCT CY22381FXI CY22381FXIT CY22381SXC-xxx[7] CY22381SXC-xxxT[7] CY22381SXI-xxx[7] CY22381SXI-xxxT[7] 8-SOIC 8-SOIC - Tape and Reel 8-SOIC 8-SOIC - Tape and Reel 8-SOIC 8-SOIC - Tape and Reel 8-SOIC 8-SOIC - Tape and Reel Commercial (TA=0C to 70C) Commercial (TA=0C to 70C) Industrial (TA=-40C to 85C) Industrial (TA=-40C to 85C) Commercial (TA=0C to 70C) Commercial (TA=0C to 70C) Industrial (TA=-40C to 85C) Industrial (TA=-40C to 85C) 3.3V 3.3V 3.3V 3.3V 3.3V 3.3V 3.3V 3.3V 8-SOIC 8-SOIC - Tape and Reel 8-SOIC 8-SOIC - Tape and Reel 8-SOIC 8-SOIC - Tape and Reel 8-SOIC 8-SOIC - Tape and Reel Package Type Operating Range Commercial (TA=0C to 70C) Commercial (TA=0C to 70C) Industrial (TA=-40C to 85C) Industrial (TA=-40C to 85C) Commercial (TA=0C to 70C) Commercial (TA=0C to 70C) Industrial (TA=-40C to 85C) Industrial (TA=-40C to 85C) Operating Voltage 3.3V 3.3V 3.3V 3.3V 3.3V 3.3V 3.3V 3.3V Notes: 7. The CY22381SC-xxx and CY22381SI-xxx are factory programmed configurations. Factory programming is available for high-volume design opportunities of 100Ku/year or more in production. For more details, contact your local Cypress FAE or Cypress Sales Representative. Document #: 38-07012 Rev. *D Page 6 of 8 CY22381 Package Drawing and Dimensions 8 Lead (150 Mil) SOIC - S08 8-lead (150-Mil) SOIC S8 PIN 1 ID 4 1 1. DIMENSIONS IN INCHES[MM] MIN. MAX. 2. PIN 1 ID IS OPTIONAL, ROUND ON SINGLE LEADFRAME RECTANGULAR ON MATRIX LEADFRAME 3. REFERENCE JEDEC MS-012 0.230[5.842] 0.244[6.197] 0.150[3.810] 0.157[3.987] 4. PACKAGE WEIGHT 0.07gms PART # S08.15 STANDARD PKG. SZ08.15 LEAD FREE PKG. 5 8 0.189[4.800] 0.196[4.978] SEATING PLANE 0.010[0.254] 0.016[0.406] X 45 0.061[1.549] 0.068[1.727] 0.004[0.102] 0.050[1.270] BSC 0.004[0.102] 0.0098[0.249] 0~8 0.016[0.406] 0.035[0.889] 0.0075[0.190] 0.0098[0.249] 0.0138[0.350] 0.0192[0.487] 51-85066-*C CYClocks RT is a trademark of Cypress Semiconductor Corporation. All product and company names are the trademarks of their respective holders. Document #: 38-07012 Rev. *D Page 7 of 8 CY22381 Document History Page Document Title: CY22381 Three-PLL General Purpose Flash Programmable Clock Generator Document Number: 38-07012 REV. ** *A ECN NO. 106737 108514 Issue Date 07/03/01 08/23/01 Orig. of Change TLG JWK New data sheet Updated based on characterization results Removed "Preliminary" heading Removed soldering temperature rating Split crystal load into two typical specs representing digital settings range Changed t5 max to 300 ns Changed t6 typical to 200 ps Changed t7 typical to 1.0 ms Changed from preliminary to final Added power-up requirements to Operating Conditions information Added lead-free devices Description of Change *B *C *D 110053 121863 279431 12/10/01 12/14/02 See ECN CKN RBI RGL Document #: 38-07012 Rev. *D Page 8 of 8 |
Price & Availability of CY22381
 |
|
|
|
|
All Rights Reserved © IC-ON-LINE 2003 - 2022 |
| [Add Bookmark] [Contact Us] [Link exchange] [Privacy policy] |
|
Mirror Sites : [www.datasheet.hk]
[www.maxim4u.com] [www.ic-on-line.cn]
[www.ic-on-line.com] [www.ic-on-line.net]
[www.alldatasheet.com.cn]
[www.gdcy.com]
[www.gdcy.net] |