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CY22381 CY223811
Three-PLL General Purpose FLASH Programmable Clock Generator
Features

8-pin SOIC package (CY22381) 8-pin SOIC package with NiPdAu lead finish (CY223811) CyClocks RTTM support
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 through external LVTTL Input 3.3V operation
Functional Description
The CY22381 is the next-generation programmable Flash programmable clock for use in networking, telecommunication, datacom, and other general-purpose applications. The CY22381 offers up to three configurable outputs in a 8-pin SOIC, running off a 3.3V power supply. The on-chip reference oscillator is designed to run off an 8-30-MHz crystal, or a 1-166-MHz external clock signal. The CY22381 has a three PLLs driving 3 programmable output clocks. The output clocks are derived from the PLL or the reference frequency (REF). Output post dividers are available for either. The CY223811 is the CY22381 with NiPdAu lead finish.
Logic Block Diagram
XTALIN XTALOUT OSC. PLL1 CONFIGURATION FLASH 11-BIT P 8-BIT Q Divider 7-BIT CLKC
PLL2 SHUTDOWN/OE FS/SUSPEND 11-BIT P 8-BIT Q
4x3 Crosspoint Switch
Divider 7-BIT
CLKB
PLL3 11-BIT P 8-BIT Q Divider 7-BIT CLKA
Cypress Semiconductor Corporation Document #: 38-07012 Rev. *H
*
198 Champion Court
*
San Jose, CA 95134-1709 * 408-943-2600 Revised January 17, 2011
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CY22381 CY223811
Contents
Features ............................................................................. 1 Functional Description ..................................................... 1 Logic Block Diagram ........................................................ 1 Pinouts .............................................................................. 3 Pin Definitions .................................................................. 3 Operation ........................................................................... 3 Configurable PLLs ....................................................... 3 General-Purpose Input ................................................ 3 Crystal Input ................................................................ 3 Crystal Drive Level and Power .................................... 4 Output Configuration ................................................... 4 Power-Saving Features ............................................... 4 Improving Jitter ............................................................ 4 CyClocks RT Software ..................................................... 4 Maximum Ratings ............................................................. 5 Operating Conditions ....................................................... 5 Recommended Crystal Specifications ........................... 5 Electrical Characteristics ................................................. 5 Switching Characteristics ................................................ 6 Switching Waveforms ...................................................... 6 Possible Configurations ............................................... 8 Ordering Information ........................................................ 8 Package Drawing and Dimensions ................................ 9 Acronyms .......................................................................... 9 Document Conventions ................................................... 9 Units of Measure ......................................................... 9 Document History Page ................................................. 10 Sales, Solutions, and Legal Information ...................... 11 Worldwide Sales and Design Support ....................... 11 Products .................................................................... 11 PSoC Solutions ......................................................... 11
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CY22381 CY223811
Pinouts
Figure 1. CY22381, CY223811- 8-pin SOIC CLKC GND XTALIN XTALOUT 1 2 3 4 8 7 6 5 FS/SUSPEND/OE/SHUTDOWN VDD CLKA CLKB
Pin Definitions
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. 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.
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. The CY223811 is the CY22381 with NiPdAu lead finish.
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.
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 capacitance interacts with load, bias, supply, and temperature changes. Non-linear (FET gate) crystal load capacitors must not be used for MPEG, 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 0.375pF for a total crystal load range of 6pF to 30pF. 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.
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
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Crystal Drive Level and Power
Crystals are specified to accept a maximum drive level. Generally, larger crystals can accept more power. The drive level specification in the table below is a general upper bound for the power driven by the oscillator circuit in the CY22381. For a given voltage swing, power dissipation in the crystal is proportional to ESR and proportional to the square of the crystal frequency. (Note that actual ESR is sometimes much less than the value specified by the crystal manufacturer.) Power is also almost proportional to the square of CL. Power can be reduced to less than the DL specification in the table below by selecting a reduced frequency crystal with low CL and low R1 (ESR).
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 is less than 5 A (typical). After leaving shutdown mode, the PLLs has 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.
Output Configuration
Under normal operation there are four internal frequency sources that may be routed through a programmable crosspoint switch to any of the three outputs through 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 15pF. While driving
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.
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CY22381 CY223811
Maximum Ratings
Exceeding maximum ratings may shorten the useful life of the device. User guidelines are 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 at 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
Parameter VDD TA Supply Voltage Commercial Operating Temperature, Ambient Industrial Operating Temperature, Ambient CLOAD_OUT Max. Load Capacitance fREF External Reference Crystal External Reference Clock[2], Commercial External Reference Clock[2], Industrial tPU 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
Recommended Crystal Specifications
Parameter FNOM CLNOM R1 DL Description Nominal crystal frequency Nominal load capacitance Equivalent series resistance Fundamental mode (ESR) Crystal drive level No external series resistor assumed Description Parallel resonance, fundamental mode Min 8 8 - - Typ. - - - 0.5 Max 30 20 50 2 Unit MHz pF mW
Electrical Characteristics
Parameter IOH IOL CXTAL_MIN CXTAL_MAX CIN VIH VIL IIH IIL IOZ Description Output High Output Low Crystal Load Crystal Load Current[3] Current[3] Capacitance[3] Capacitance[3] Conditions[1] 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 Min 12 12 - - - 70% - - - - Typ 24 24 6 30 7 - - <1 <1 - Max - - - - - - 30% 10 10 10 Unit mA mA pF pF pF VDD VDD A A A
Input Pin Capacitance[3] HIGH-level Input Voltage LOW-level Input Voltage Input HIGH Current Input LOW Current Output Leakage Current
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.
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CY22381 CY223811
Electrical Characteristics
Parameter IDD IDDS Description Total Power Supply Current Conditions[1] 3.3 V Power Supply; 3 outputs at 50 MHz 3.3 V Power Supply; 3 outputs at 166 MHz Total Power Supply Current in Shutdown active Shutdown Mode Min - - - Typ 35 70 5 Max - - 20 Unit mA mA A
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
Rising Edge Slew Rate[3] Falling Edge Slew Rate[3] Timing[3] Output Three-state
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
t6 t7
Clock Jitter[3, 6] Lock Time[3]
- -
200 1.0
- 3
ps ms
Switching Waveforms
Figure 2. All Outputs, Duty Cycle and Rise and Fall Time
t1 t2 OUTPUT t3 t4
Figure 3. Output Three-State Timing
OE t5 ALL THREE-STATE OUTPUTS t5
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.
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CY22381 CY223811
Switching Waveforms (continued)
Figure 4. CLK Output Jitter
t6 CLK OUTPUT
Figure 5. Frequency Change
SELECT OLD SELECT Fold OUTPUT NEW SELECT STABLE t7 Fnew
Test Circuit
VDD 0.1 mF OUTPUTS CLKout CLOAD
GND
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CY22381 CY223811
Ordering Information
Ordering Code Pb-Free CY223811FXI CY22381FXC CY22381FXI CY22381FXIT Programmer CY3672-USB CY3699 Programmer CY22381F Adapter for CY3672-USB
[9]
Package Type 8-SOIC with NiPdAu lead frame 8-SOIC 8-SOIC - Tape and Reel 8-SOIC 8-SOIC - Tape and Reel
Operating Range 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
CY22381FXCT
Some product offerings are factory programmed customer specific devices with customized part numbers. The Possible Configurations table shows the available device types, but not complete part numbers. Contact your local Cypress FAE or Sales Representative for more information.
Possible Configurations
Ordering Code CY22381SI-xxxT Pb-Free 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 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
[7, 8]
Package Type 8-SOIC - Tape and Reel
Operating Range Industrial (TA=-40C to 85C)
Operating Voltage 3.3V
Ordering Code Definitions
CY 22381 (1) (F) SX C (-xxx) (T) T = tape and reel, blank = tube Configuration specific identifier (factory programmed) Temperature Range: C = Commercial, I = Industrial Package: S = SOIC, leaded SX = SOIC, Pb-free X = SOIC, Pb-free F = field programmable, blank = factory programmed Lead finish:1 = NiPdAu, blank = unspecified Part Identifier Company Code: CY = Cypress Semiconductor
Notes 7. The CY22381SI-xxx, CY22381SXC-xxx and CY22381SXI-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. 8. Not recommended for new designs. 9. The CY22381FSZC and CY22381FXC are identical. For new designs, use CY22381FXC.
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CY22381 CY223811
Package Drawing and Dimensions
Figure 6. 8-Pin (150-mil) SOIC
51-85066-*D
Acronyms
Acronym CMOS ESR FET MPEG OE PLL SOIC Description complementary metal oxide semiconductor equivalent series resistance field effect transistor motion picture experts group output enable phase-locked loop small outline integrated circuit
Document Conventions
Units of Measure
Symbol Unit of Measure degree Celcius micro Amperes milli Amperes milli seconds milli Watts Mega Hertz micro Amps micro Farads nano seconds pico Farad pico seconds Volts
C
A mA ms mW MHz A F ns pF ps V
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Document History Page
Document Title: CY22381, CY223811 Three-PLL General Purpose Flash Programmable Clock Generator Document Number: 38-07012 Revision ** *A ECN 106737 108514 Orig. of Change TLG JWK Submission Date 07/03/01 08/23/01 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 Updated template. Added Note 8 and 9. Added part number CY22381FC, CY22381FCT, CY3672-USB, CY3699, CY22381FSZC in ordering information table. Removed part number CY22381FI, CY22381FIT, CY22381SC-xxx, CY22381SC-xxxT, CY22381SI-xxx, and CY22381SI-xxxT in Ordering Information table. Added CY223811FXI (NiPdAu lead finish). Changed Lead-Free to Pb-Free. Add CY223811 to the document title Distinguish between CY22381 and CY223811 in page 1 Features section Add part number CY22381SI-xxxT in Ordering Information table. Removed obsolete parts from Ordering Information table and moved `xx' parts to Possible Configurations table Updated package diagram Add crystal parameter table, ordering code definition, acronym and units tables. Crystal Drive Level and Power. Remove FTG from CY3672. Removed Benefits section and replaced with Functional Description section. Description of Change
*B *C *D *E
110053 121863 279431 2584052
CKN RBI RGL AESA
12/10/01 12/14/02 See ECN 10/10/08
*F
2620588
KVM/AESA
12/11/08
*G
2897317
KVM
03/22/10
*H
3065190
KVM/BASH
01/17/11
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Sales, Solutions, and Legal Information
Worldwide Sales and Design Support
Cypress maintains a worldwide network of offices, solution centers, manufacturer's representatives, and distributors. To find the office closest to you, visit us at Cypress Locations.
Products
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PSoC Solutions
psoc.cypress.com/solutions PSoC 1 | PSoC 3 | PSoC 5
(c) Cypress Semiconductor Corporation, 2001-2011. The information contained herein is subject to change without notice. Cypress Semiconductor Corporation assumes no responsibility for the use of any circuitry other than circuitry embodied in a Cypress product. Nor does it convey or imply any license under patent or other rights. Cypress products are not warranted nor intended to be used for medical, life support, life saving, critical control or safety applications, unless pursuant to an express written agreement with Cypress. Furthermore, Cypress does not authorize its products for use as critical components in life-support systems where a malfunction or failure may reasonably be expected to result in significant injury to the user. The inclusion of Cypress products in life-support systems application implies that the manufacturer assumes all risk of such use and in doing so indemnifies Cypress against all charges. Any Source Code (software and/or firmware) is owned by Cypress Semiconductor Corporation (Cypress) and is protected by and subject to worldwide patent protection (United States and foreign), United States copyright laws and international treaty provisions. Cypress hereby grants to licensee a personal, non-exclusive, non-transferable license to copy, use, modify, create derivative works of, and compile the Cypress Source Code and derivative works for the sole purpose of creating custom software and or firmware in support of licensee product to be used only in conjunction with a Cypress integrated circuit as specified in the applicable agreement. Any reproduction, modification, translation, compilation, or representation of this Source Code except as specified above is prohibited without the express written permission of Cypress. Disclaimer: CYPRESS MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARD TO THIS MATERIAL, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. Cypress reserves the right to make changes without further notice to the materials described herein. Cypress does not assume any liability arising out of the application or use of any product or circuit described herein. Cypress does not authorize its products for use as critical components in life-support systems where a malfunction or failure may reasonably be expected to result in significant injury to the user. The inclusion of Cypress' product in a life-support systems application implies that the manufacturer assumes all risk of such use and in doing so indemnifies Cypress against all charges. Use may be limited by and subject to the applicable Cypress software license agreement.
Document #: 38-07012 Rev. *H
Revised January 17, 2011
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CYClocks RT is a trademark of Cypress Semiconductor Corporation. All products and company names mentioned in this document may be the trademarks of their respective holders.
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