CY22381
CY223811
Three-PLL General Purpose FLASH
Programmable Clock Generator
Features
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8-pin SOIC package (CY22381)
8-pin SOIC package with NiPdAu lead finish (CY223811)
CyClocks RT™ 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
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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
4×3
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
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198 Champion Court
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San Jose
,
CA 95134-1709
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408-943-2600
Revised January 17, 2011
CYPRESS [ CYPRESS SEMICONDUCTOR ]
