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CY22381
CY223811
Three-PLL General Purpose
Flash Programmable Clock Generator
Cypress Semiconductor Corporation • 198 Champion Court • San Jose, CA 95134-1709 • 408-943-2600
Document Number: 38-07012 Rev. *K Revised November 21, 2014
Three-PLL Ge neral Purpose Fl ash Programmab le Clock Gen erator
Features
■ 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
■ 3.3 V operation
■ 8-pin small outline integrated circuit (SOIC) package
(CY22381)
■ 8-pin SOIC package with NiPdAu lead finish (CY223811)
■ CyClocks RT™ support
Functional Description
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.
For a complete list of related documentation, click here.
XTALIN
XTALOUT
FS/SUSPEND
SHUTDOWN/OE
CONFIGURATION
FLASH
OSC.
PLL1
11-BIT P
8-BIT Q
PLL2
11-BIT P
8-BIT Q
PLL3
11-BIT P
8-BIT Q
4 × 3
Switch
Crosspoint
Divider
7-BIT
Divider
7-BIT
Divider
7-BIT
CLKA
CLKB
CLKC
Logic Block Diagram
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