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IDT74FCT32932-100

更新时间： 2024-11-15 22:36:11

品牌	Logo	应用领域
艾迪悌 - IDT		时钟驱动器
页数	文件大小	规格书
9页	135K
描述
3.3V LOW SKEW PLL-BASED CMOS CLOCK DRIVER

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IDT74FCT3932-100, IDT74FCT32932-100

LOW SKEW PLL-BASED CLOCK DRIVER

COMMERCIAL TEMPERATURE RANGES

IDT74FCT3932-100

IDT74FCT32932-100

ADVANCE INFORMATION

3.3V LOW SKEW PLL-BASED

CMOS CLOCK DRIVER

Integrated Device Technology, Inc.

feedbackpathdelayshouldbemadetomatchthisoutputpath

delay.

The PLL consists of the phase/frequency detector, charge

pump, loopfilterandVCO. TheFCT3932requiresnoexternal

loop filter components.

The FCT3932 provides 17 outputs grouped in 3 banks with

individual 3-state control and an additional dedicated feed-

backoutputwithnodisable. ConnectingQ_FBtoFEEDBACK

ensures uninterrupted PLL operation when all outputs are

disabled.

Individual bank 3-state allows users to disable unused

outputs in order to limit power dissipation or minimize switch-

ing noise. It also allows users to shut down outputs in low

power modes while maintaining phase lock.

TheFCT3932providesaLOCKpinthatgoeshighwhenthe

device is phase-locked.

The user can bypass the PLL for testability purposes by

deasserting PLL_EN. In this "test" mode, the input frequency

is not limited to the specified range.

The FCT3932 provides an asynchronous reset input, RST,

whichresetsalloutputs. Thisinitializesallinternalregistersso

that outputs start up in a known state.

FEATURES:

• 0.5 MICRON CMOS Technology

• Guaranteed low skew

• 16 programmable frequency configurations

• 17 3-state outputs:

±24 mA FCT3932

±8 mA FCT32932

• Output configuration:

BANK1: 4 outputs

BANK2: 8 outputs

BANK3: 5 outputs

• Dedicated feedback output (Q_FB)

• Maximum output frequency: 100MHz

• VCC = 3.3V ±0.3V

• Inputs can be driven from 3.3V or 5V components

• Available in 48 SSOP, TSSOP packages

• Suited to SDRAM applications

DESCRIPTION:

The FCT3932 uses phase-lock loop technology to lock the

frequency and phase of the feedback to the input reference

clock. It provides a large number of low skew outputs that are

configurable in 16 different modes using the CNTRL 1-4

inputs. A dedicated output, Q_FB, is provided to supply the

PLL feedback and it should be connected to the FEEDBACK

input. Q_FB is located adjacent to FEEDBACK to minimize

the delay in the feedback path. In order to offset any delay in

theoutputpathfromtheFCT3932outputtoareceivingdevice,

APPLICATIONS:

SDRAM DIMM Clock, Caches, high speed microproces-

sors, motherboard clock distribution to DIMMs.

FUNCTIONAL BLOCK DIAGRAM

LOCK

FEEDBACK

Voltage

Controlled

Oscillator

Charge

Pump &

Loop Filter

Phase/Freq.

Detector

REF_IN

PLL_EN

Mux

OE1

OE2

Q41-4

(BANK 1)

Q81-8

(BANK 2)

OE3

Q51-5

(BANK 3)

CNTRL1-4

Q_FB

RST

3267 drw 01

The IDT logo is a registered trademark of Integrated Device Technology, Inc.

COMMERCIAL TEMPERATURE RANGE

NOVEMBER 1996

1996 Integrated Device Technology, Inc.

9.9

DSC-3267/2

12 3 4 5 6 7...9

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与IDT74FCT32932-100相关器件

型号	品牌	获取价格	描述	数据表
IDT74FCT32932-100PA	IDT	获取价格	3.3V LOW SKEW PLL-BASED CMOS CLOCK DRIVER
IDT74FCT32932-100PV	IDT	获取价格	3.3V LOW SKEW PLL-BASED CMOS CLOCK DRIVER
IDT74FCT3373AP	ETC	获取价格	8-Bit D-Type Latch
IDT74FCT3373APY	ETC	获取价格	8-Bit D-Type Latch
IDT74FCT3373ASO	ETC	获取价格	8-Bit D-Type Latch
IDT74FCT3373P	ETC	获取价格	8-Bit D-Type Latch
IDT74FCT3373PY	ETC	获取价格	8-Bit D-Type Latch
IDT74FCT3373SO	ETC	获取价格	8-Bit D-Type Latch
IDT74FCT3374AP	ETC	获取价格	Octal D-Type Flip-Flop
IDT74FCT3374APY	ETC	获取价格	Octal D-Type Flip-Flop

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