CY22381

CY223811

Three-PLL General Purpose FLASH

Programmable Clock Generator

Cypress Semiconductor Corporation

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198 Champion Court

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San Jose

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408-943-2600

Document #: 38-07012 Rev. *I

Revised May 17, 2011

Features

seven-bit post divide)

(CY22381)

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

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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