CY2291_08 Datasheet, PDF (1/12 Pages) Cypress Semiconductor – Three-PLL General Purpose EPROM Programmable Clock Generator

CY2291
Three-PLL General Purpose EPROM
Programmable Clock Generator
Features
■ Three integrated phase-locked loops
■ EPROM programmability
■ Factory-programmable (CY2291) or field-programmable
(CY2291F) device options
■ Low-skew, low-jitter, high-accuracy outputs
■ Power-management options (Shutdown, OE, Suspend)
■ Frequency select option
■ Smooth slewing on CPUCLK
■ Configurable 3.3V or 5V operation
■ 20-pin SOIC Package
Part Number Outputs
Input Frequency Range
CY2291
8 10 MHz–25 MHz (external crystal)
1 MHz–30 MHz (reference clock)
CY2291I
8 10 MHz–25 MHz (external crystal)
1 MHz–30 MHz (reference clock)
CY2291F
8 10 MHz–25 MHz (external crystal)
1 MHz–30 MHz (reference clock)
CY2291FI
8 10 MHz–25 MHz (external crystal)
1 MHz–30 MHz (reference clock)
Benefits
■ Generates up to three custom frequencies from external
sources
■ Easy customization and fast turnaround
■ Programming support available for all opportunities
■ Meets critical industry standard timing requirements
■ Supports low-power applications
■ Eight user-selectable frequencies on CPU PLL
■ Allows downstream PLLs to stay locked on CPUCLK output
■ Enables application compatibility
■ Industry-standard packaging saves on board space
Output Frequency Range
76.923 kHz–100 MHz (5V)
76.923 kHz–80 MHz (3.3V)
76.923 kHz–90 MHz (5V)
76.923 kHz–66.6 MHz (3.3V)
76.923 kHz–90 MHz (5V)
76.923 kHz–66.6 MHz (3.3V)
76.923 kHz–80 MHz (5V)
76.923 kHz–60.0 MHz (3.3V)
Specifics
Factory Programmable
Commercial Temperature
Factory Programmable
Industrial Temperature
Field Programmable
Commercial Temperature
Field Programmable
Industrial Temperature
Logic Block Diagram
32XIN
32XOUT
XTALIN
XTALOUT
S0
S1
S2/SUSPEND
OSC.
OSC.
CPLL
(8 BIT)
UPLL
(10 BIT)
SPLL
(8 BIT)
SHUTDOWN/
OE
/1,2,4
/1,2,4,8
/1,2,3,4,5,6
/8,10,12,13
/20,24,26,40
/48,52,96,104
/2,3,4
CONFIG
EPROM
32K
XBUF
CPUCLK
CLKA
CLKB
CLKC
CLKD
CLKF
Cypress Semiconductor Corporation • 198 Champion Court
Document #: 38-07189 Rev. *C
• San Jose, CA 95134-1709 • 408-943-2600
Revised September 16, 2008
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