Datasheet > IDT72235LB15TFI8

IDT72235LB15TFI8

更新时间： 2024-11-06 08:49:51

品牌	Logo	应用领域
艾迪悌 - IDT		先进先出芯片
页数	文件大小	规格书
16页	157K
描述
FIFO, 2KX18, 10ns, Synchronous, CMOS, PQFP64, PLASTIC, STQFP-64

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中文翻译

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数据手册

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IDT72235LB15TFI8 数据手册

CMOS SyncFIFO^TM

256 x 18, 512 x 18, 1,024 x 18,

2,048 x 18, and 4,096 x 18

IDT72205LB, IDT72215LB,

IDT72225LB, IDT72235LB,

IDT72245LB

writecontrols.TheseFIFOsareapplicableforawidevarietyofdatabuffering

needs, such as optical disk controllers, Local Area Networks (LANs), and

interprocessorcommunication.

FEATURES:

• 256 x 18-bit organization array (IDT72205LB)

• 512 x 18-bit organization array (IDT72215LB)

• 1,024 x 18-bit organization array (IDT72225LB)

• 2,048 x 18-bit organization array (IDT72235LB)

• 4,096 x 18-bit organization array (IDT72245LB)

• 10 ns read/write cycle time

TheseFIFOshave18-bitinputandoutputports.Theinputportiscontrolled

byafree-runningclock(WCLK),andaninputenablepin(WEN).Dataisread

intothesynchronousFIFOoneveryclockwhenWENisasserted.Theoutput

portiscontrolledbyanotherclockpin(RCLK)andanotherenablepin(REN).

Thereadclockcanbetiedtothewriteclockforsingleclockoperationorthe

twoclockscanrunasynchronousofoneanotherfordual-clockoperation. An

OutputEnablepin(OE)isprovidedonthereadportforthree-statecontrolof

theoutput.

Thesynchronous FIFOs havetwofixedflags,Empty (EF)andFull(FF),

andtwoprogrammableflags,Almost-Empty(PAE)andAlmost-Full(PAF).The

offsetloadingoftheprogrammableflagsiscontrolledbyasimplestatemachine,

andisinitiatedbyassertingtheLoadpin(LD). AHalf-Fullflag(HF)isavailable

when the FIFO is used in a single device configuration.

ThesedevicesaredepthexpandableusingaDaisy-Chaintechnique.The

XI andXO pins are usedtoexpandthe FIFOs. Indepthexpansionconfigu-

ration, FirstLoad(FL)is groundedonthe firstdevice andsettoHIGHforall

other devices in the Daisy Chain.

The IDT72205LB/72215LB/72225LB/72235LB/72245LB is fabricated

usingIDT’shigh-speedsubmicronCMOStechnology.

• Empy and Full flags signal FIFO status

• Easy expandable in depth and width

• Asynchronous or coincident read and write clocks

• Programmable Almost-Empty and Almost-Full flags with

default settings

• Half-Full flag capability

• Dual-Port zero fall-through time architecture

• Output enable puts output data bus in high-impedence state

• High-performance submicron CMOS technology

• Available in a 64-lead thin quad flatpack (TQFP/STQFP)

and plastic leaded chip carrier (PLCC)

• Industrial temperature range (–40°C to +85°C) is available

• Green parts available, see ordering information

DESCRIPTION:

The IDT72205LB/72215LB/72225LB/72235LB/72245LBare very high

speed,low-powerFirst-In,First-Out(FIFO)memorieswithclockedreadand

FUNCTIONAL BLOCK DIAGRAM

WCLK

D0-D17

INPUT REGISTER

OFFSET REGISTER

FLAG

WRITE CONTROL

LOGIC

•

LOGIC

RAM ARRAY

256 x 18, 512 x 18

1,024 x 18, 2,048 x 18

4,096 x 18

)

READ POINTER

WRITE POINTER

•

READ CONTROL

LOGIC

EXPANSION LOGIC

(

OUTPUT REGISTER

RESET LOGIC

2766 drw 01

RCLK

Q0-Q17

IDTandtheIDTlogoaretrademarksofIntegratedDeviceTechnology, Inc. SyncFIFOisatrademarkofIntegratedDeviceTechnology, Inc.

OCTOBER 2006

COMMERCIAL AND INDUSTRIAL TEMPERATURE RANGES

DSC-2766/1

12 3 4 5 6 7...16

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与IDT72235LB15TFI8相关器件

型号	品牌	获取价格	描述	数据表
IDT72235LB20G	IDT	获取价格	CMOS SyncFIFOO 256 x 18, 512 x 18, 1024 x 18, 2048 x 18 and 4096 x 18
IDT72235LB20GB	IDT	获取价格	CMOS SyncFIFOO 256 x 18, 512 x 18, 1024 x 18, 2048 x 18 and 4096 x 18
IDT72235LB20J	IDT	获取价格	CMOS SyncFIFOO 256 x 18, 512 x 18, 1024 x 18, 2048 x 18 and 4096 x 18
IDT72235LB20JB	IDT	获取价格	CMOS SyncFIFOO 256 x 18, 512 x 18, 1024 x 18, 2048 x 18 and 4096 x 18
IDT72235LB20PF	IDT	获取价格	CMOS SyncFIFOO 256 x 18, 512 x 18, 1024 x 18, 2048 x 18 and 4096 x 18
IDT72235LB20PFB	IDT	获取价格	CMOS SyncFIFOO 256 x 18, 512 x 18, 1024 x 18, 2048 x 18 and 4096 x 18
IDT72235LB20TF	IDT	获取价格	CMOS SyncFIFOO 256 x 18, 512 x 18, 1024 x 18, 2048 x 18 and 4096 x 18
IDT72235LB20TFB	IDT	获取价格	CMOS SyncFIFOO 256 x 18, 512 x 18, 1024 x 18, 2048 x 18 and 4096 x 18
IDT72235LB25F	IDT	获取价格	FIFO, 2KX18, 15ns, Synchronous, CMOS, QFP-68
IDT72235LB25G	IDT	获取价格	CMOS SyncFIFOO 256 x 18, 512 x 18, 1024 x 18, 2048 x 18 and 4096 x 18

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