CY22381 datasheet(1/11 Pages) CYPRESS

Part #	CY22381

Description	Three-PLL General Purpose FLASH Programmable Clock Generator

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Manufacturer	CYPRESS [Cypress Semiconductor]

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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 #: 38-07012 Rev. *H

Revised January 17, 2011

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

■ 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

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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