CY22381_11 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
■ 3.3V operation
Logic Block Diagram
■ 8-pin 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 3.3V 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.
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. *H
• San Jose, CA 95134-1709 • 408-943-2600
Revised January 17, 2011
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