CY2291_02 Datasheet, PDF (1/14 Pages) Cypress Semiconductor – Three-PLL General Purpose EPROM Programmable Clock Generator

5
CY2291
Three-PLL General Purpose
EPROM Programmable Clock Generator
Features
Benefits
Three integrated phase-locked loops
Generates up to 3 custom frequencies from external sources
EPROM programmability
Easy customization and fast turnaround
Factory-programmable (CY2291) or field-programmable Programming support available for all opportunities
(CY2291F) device options
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
8 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
20-pin SOIC Package
Industry-standard packaging saves on board space
Selector Guide
Part Number Outputs
Input Frequency Range
Output Frequency Range
CY2291
8
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)
CY2291I
8
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)
CY2291F
8
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)
CY2291FI
8
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)
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)
/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
32K
XBUF
CPUCLK
CLKA
CLKB
CLKC
CLKD
CLKF
SHUTDOWN/
OE
CONFIG
EPROM
Cypress Semiconductor Corporation • 3901 North First Street • San Jose • CA 95134 • 408-943-2600
Document #: 38-07189 Rev. *A
Revised December 14, 2002