CY2292SL-1T3

CY2292 Three-PLL General-Purpose EPROM Programmable Clock Generator Features Benefits • Three integrated phase-locked loops • EPROM programmability • Generates up to three custom frequencies from external sources • Factory-programmable (CY2292) or field-programmable (CY2292F) device options • Easy customization and fast turnaround • Programming support available for all opportunities • Low-skew, low-jitter, high-accuracy outputs • Meets critical industry standard timing requirements • Power-management options (Shutdown, OE, Suspend) • Supports low-power applications • Frequency select option • Eight user-selectable frequencies on CPU PLL • Smooth slewing on CPUCLK • Allows downstream PLLs to stay locked on CPUCLK output • Configurable 3.3V or 5V operation • Enables application compatibility • 16-pin SOIC Package (TSSOP: F only) • Industry-standard packaging saves on board space Selector Guide Part Number Outputs Input Frequency Range Output Frequency Range Specifics CY2292 6 10 MHz–25 MHz (external crystal) 76.923 kHz–100 MHz (5V) 1 MHz–30 MHz (reference clock) 76.923 kHz–80 MHz (3.3V) Factory Programmable Commercial Temperature CY2292I 6 10 MHz–25 MHz (external crystal) 76.923 kHz–90 MHz (5V) 1 MHz–30 MHz (reference clock) 76.923 kHz–66.6 MHz (3.3V) Factory Programmable Industrial Temperature CY2292F 6 10 MHz–25 MHz (external crystal) 76.923 kHz–90 MHz (5V) 1 MHz–30 MHz (reference clock) 76.923 kHz–66.6 MHz (3.3V) Field Programmable Commercial Temperature CY2292FI 6 10 MHz–25 MHz (external crystal) 76.923 kHz–80 MHz (5V) 1 MHz–30 MHz (reference clock) 76.923 kHz–60.0 MHz (3.3V) Field Programmable Industrial Temperature CY2292FZ 6 10 MHz–25 MHz (external crystal) 76.923 kHz–90 MHz (5V) 1 MHz–30 MHz (reference clock) 76.923 kHz–66.6 MHz (3.3V) Field Programmable Commercial Temperature Logic Block Diagram . XTALIN OSC. XTALOUT XBUF CPLL (8 BIT) /1,2,4 CPUCLK S0 CLKA S1 UPLL (10 BIT) SPLL (8 BIT) CLKB /1,2,4,8 /1,2,3,4,5,6 /8,10,12,13 /20,24,26,40 /48,52,96,104 CLKC CLKD CONFIG EPROM SHUTDOWN/ OE Cypress Semiconductor Corporation Document #: 38-07449 Rev. *B MUX S2/SUSPEND • 3901 North First Street • San Jose, CA 95134 • 408-943-2600 Revised October 12, 2004 CY2292 Pin Configurations CY2292 16-pin SOIC CLKC 1 16 VDD GND 2 15 SHUTDOWN/OE S2/SUSPEND 3 14 XTALIN 4 13 VDD S1 XTALOUT XBUF 5 12 6 11 S0 GND CLKD 7 10 CLKA CPUCLK 8 9 CLKB Pin Summary Name CLKC Pin Number CY2292 1 Description Configurable clock output C. VDD 2, 14 Voltage supply. GND 3, 11 Ground. XTALIN[1] 4 Reference crystal input or external reference clock input. XTALOUT[1, 2] 5 Reference crystal feedback. XBUF 6 Buffered reference clock output. CLKD 7 Configurable clock output D. CPUCLK 8 CPU frequency clock output. CLKB 9 Configurable clock output B. CLKA 10 Configurable clock output A. S0 12 CPU clock select input, bit 0. S1 13 CPU clock select input, bit 1. S2/SUSPEND 15 CPU clock select input, bit 2. Optionally enables suspend feature when LOW.[3] SHUTDOWN/OE 16 Places outputs in three-state[4] condition and shuts down chip when LOW. Optionally, only places outputs in three-state[4] condition and does not shut down chip when LOW. Operation The CY2292 is a third-generation family of clock generators. The CY2292 is upwardly compatible with the industry standard ICD2023 and ICD2028 and continues their tradition by providing a high level of customizable features to meet the diverse clock generation needs of modern motherboards and other synchronous systems. All parts provide a highly configurable set of clocks for PC motherboard applications. Each of the four configurable clock outputs (CLKA–CLKD) can be assigned 1 of 30 frequencies in any combination. Multiple outputs configured for the same or related[3] frequencies will have low (≤ 500 ps) skew, in effect providing on-chip buffering for heavily loaded signals. The CY2292 can be configured for either 5V or 3.3V operation. The internal ROM tables use EPROM technology, allowing full customization of output frequencies. The reference oscillator has been designed for 10-MHz to 25-MHz crystals, providing additional flexibility. No external components are required with this crystal. Alternatively, an external reference clock of frequency between 1 MHz and 30 MHz can be used. Output Configuration The CY2292 has four independent frequency sources on-chip. These are the reference oscillator, and three Phase-Locked Loops (PLLs). Each PLL has a specific function. The System PLL (SPLL) provides fixed output frequencies on the configurable outputs. The SPLL offers the most output frequency divider options. The CPU PLL (CPLL) is controlled by the select inputs (S0–S2) to provide eight user-selectable frequencies with smooth slewing between frequencies. The Utility PLL (UPLL) provides the most accurate clock. It is often used for miscellaneous frequencies not provided by the other frequency sources. All configurations are EPROM programmable, providing short sample and production lead times. Please refer to the application note Understanding the CY2291, CY2292, and CY2295 for information on configuring the part. Notes: 1. For best accuracy, use a parallel-resonant crystal, CLOAD ≈ 17 pF or 18 pF. 2. Float XTALOUT pin if XTALIN is driven by reference clock (as opposed to crystal). 3. Please refer to application note “Understanding the CY2291, CY2292 and CY2295” for more information. 4. The CY2292 has weak pull-downs on all outputs. Hence, when a three-state condition is forced on the outputs, the output pins are pulled LOW. Document #: 38-07449 Rev. *B Page 2 of 11 CY2292 Power-Saving Features The SHUTDOWN/OE input three-states the outputs when pulled LOW. If system shutdown is enabled, a LOW on this pin also shuts off the PLLs, counters, the reference oscillator, and all other active components. The resulting current on the VDD pins will be less than 50 µA (for commercial temperature or 100 µA for industrial temperature). After leaving shutdown mode, the PLLs will have to relock. All outputs have a weak pull-down so that the outputs do not float when three-stated.[4] The S2/SUSPEND 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 simply forces a three-state condition.[3] The CPUCLK can slew (transition) smoothly between 20 MHz and the maximum output frequency (100 MHz at 5V/80 MHz at 3.3V for Commercial Temp. parts or 90 MHz at 5V/66.6 MHz at 3.3V for Industrial Temp. and for field-programmed parts). This feature is extremely useful in “Green” PC and laptop applications, where reducing the frequency of operation can result in considerable power savings. This feature meets all 486 and Pentium® processor slewing requirements. CyClocks Software CyClocks is an easy-to-use application that allows you to configure any one of the EPROM-programmable clocks offered by Cypress. You may specify the input frequency, PLL and output frequencies, and different functional options. Please note the output frequency ranges in this data sheet when specifying them in CyClocks to ensure that you stay within the limits. CyClocks also has a power calculation feature that allows you to see the power consumption of your specific Document #: 38-07449 Rev. *B configuration. You can download a copy of CyClocks for free on Cypress’s web site at www.cypress.com. Cypress FTG Programmer The Cypress Frequency Timing Generator (FTG) Programmer is a portable programmer designed to custom program our family of EPROM Field Programmable Clock Devices. The FTG programmers connect to a PC serial port and allow users of CyClocks software to quickly and easily program any of the CY2291F, CY2292F, CY2071AF, and CY2907F devices. The ordering code for the Cypress FTG Programmer is CY3670. Custom Configuration Request Procedure The CY229x are EPROM-programmable devices that may be configured in the factory or in the field by a Cypress Field Application Engineer (FAE). The output frequencies requested will be matched as closely as the internal PLL divider and multiplier options allow. All custom requests must be submitted to your local Cypress FAE or sales representative. The method to use to request custom configurations is: Use CyClocks software. This software automatically calculates the output frequencies that can be generated by the CY229x devices and provides a print-out of final pinout which can be submitted (in electronic or print format) to your local FAE or sales representative. The CyClocks software is available free of charge from the Cypress web site (http://www.cypress.com) or from your local sales representative. Once the custom request has been processed you will receive a part number with a 3-digit extension (e.g., CY2292SC-128) specific to the frequencies and pinout of your device. This will be the part number used for samples requests and production orders. Page 3 of 11 CY2292 Maximum Ratings Storage Temperature ................................. –65°C to +150°C Max. Soldering Temperature (10 sec) ......................... 260°C (Above which the useful life may be impaired. For user guidelines, not tested.) Junction Temperature .................................................. 150°C Supply Voltage ............................................... –0.5V to +7.0V Package Power Dissipation...................................... 750 mW DC Input Voltage............................................ –0.5V to +7.0V Static Discharge Voltage.............................................≤ 2000V (per MIL-STD-883, Method 3015) Operating Conditions[5] Parameter Description Min. Max. Unit All 4.5 5.5 V Supply Voltage, 3.3V operation All 3.0 3.6 V Commercial Operating Temperature, Ambient CY2292/CY2292F 0 +70 °C −40 +85 °C 25 pF VDD Supply Voltage, 5.0V operation VDD TA Part Numbers Industrial Operating Temperature, Ambient CY2292I/CY2292FI CLOAD Max. Load Capacitance 5.0V Operation All CLOAD Max. Load Capacitance 3.3V Operation All 15 pF fREF External Reference Crystal All 10.0 25.0 MHz External Reference Clock[6, 7, 8] All 1 30 MHz Electrical Characteristics, Commercial 5.0V Parameter Description Conditions VOH HIGH-Level Output Voltage IOH = 4.0 mA Min. Typ. Max. 2.4 V VOL LOW-Level Output Voltage IOL = 4.0 mA VIH HIGH-Level Input Voltage[9] Except crystal pins VIL LOW-Level Input Voltage[9] Except crystal pins IIH Input HIGH Current VIN = VDD – 0.5V