CY22381_1105 Datasheet, PDF (1/11 Pages) Cypress Semiconductor – Three-PLL General Purpose FLASH Programmable Clock Generator

CY22381
CY223811
Three-PLL General Purpose FLASH
Programmable Clock Generator
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
Logic Block Diagram
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.
XTALIN
XTALOUT
OSC.
CONFIGURATION
FLASH
SHUTDOWN/OE
FS/SUSPEND
PLL1
11-BIT P
8-BIT Q
PLL2
11-BIT P
8-BIT Q
PLL3
11-BIT P
8-BIT Q
4×3
Crosspoint
Switch
Divider
7-BIT
Divider
7-BIT
Divider
7-BIT
CLKC
CLKB
CLKA
Cypress Semiconductor Corporation • 198 Champion Court
Document #: 38-07012 Rev. *I
• San Jose, CA 95134-1709 • 408-943-2600
Revised May 17, 2011
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