CY22381
CY223811
Three-PLL General Purpose
Flash Programmable Clock Generator
Three-PLL General Purpose Flash Programmable Clock Generator
Features
Functional Description
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Three integrated phase-locked loops
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Ultra-wide divide counters (eight-bit Q, eleven-bit P, and
seven-bit post divide)
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Improved linear crystal load capacitors
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Flash programmability
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Field programmability
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Low-jitter, high-accuracy outputs
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Power-management options (Shutdown, OE, Suspend)
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Configurable crystal drive strength
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Frequency select option through external LVTTL Input
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3.3 V operation
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8-pin small outline integrated circuit (SOIC) package
(CY22381)
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8-pin SOIC package with NiPdAu lead finish (CY223811)
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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 3.3 V 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.
CyClocks RT™ support
For a complete list of related documentation, click here.
Logic Block Diagram
XTALIN
XTALOUT
OSC.
PLL1
Divider
7-BIT
CONFIGURATION
FLASH
PLL2
11-BIT P
8-BIT Q
SHUTDOWN/OE
FS/SUSPEND
4×3
Crosspoint
Switch
CLKC
Divider
7-BIT
CLKB
Divider
7-BIT
11-BIT P
8-BIT Q
CLKA
PLL3
11-BIT P
8-BIT Q
Cypress Semiconductor Corporation
Document Number: 38-07012 Rev. *K
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198 Champion Court
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San Jose, CA 95134-1709
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408-943-2600
Revised November 21, 2014
