Datasheet > 72245LB25TFGI8

72245LB25TFGI8

更新时间： 2024-11-15 00:43:31

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	338K
描述
CMOS SyncFIFO

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中文翻译

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数据手册

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72245LB25TFGI8 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.

ThesynchronousFIFOshavetwofixedflags, 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 and XO pins are used to expand the FIFOs. In depth expansion configu-

ration, First Load (FL) is grounded on the first device and set to HIGH for all

other devices in the Daisy Chain.

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

usinghigh-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/72245LB are 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

IDTandtheIDTlogoareregisteredtrademarksofIntegratedDeviceTechnology, Inc. SyncFIFOisatrademarkofIntegratedDeviceTechnology, Inc.

MARCH 2013

COMMERCIAL AND INDUSTRIAL TEMPERATURE RANGES

DSC-2766/3

12 3 4 5 6 7...16

中文翻译

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与72245LB25TFGI8相关器件

型号	品牌	获取价格	描述	数据表
72245LB25TFI	IDT	获取价格	TQFP-64, Tray
72245LB30GB	IDT	获取价格	FIFO, 4KX18, Synchronous, CMOS, CPGA68
7-22468-0	MACOM	获取价格	Read the following instructions carefully before and during the installation of the conver
7-22468-3	MACOM	获取价格	Read the following instructions carefully before and during the installation of the conver
72247	GAMEWELL-FCI	获取价格	Analog Addressable Duct Smoke Detectors
72249-004H	AMPHENOL	获取价格	Board Stacking Connector, 4 Contact(s), 2 Row(s), Male, Straight, Solder Terminal
72249-006HLF	AMPHENOL	获取价格	Board Connector, LEAD FREE
72249-008H	AMPHENOL	获取价格	Board Stacking Connector, 8 Contact(s), 2 Row(s), Male, Straight, Solder Terminal
72249-010H	AMPHENOL	获取价格	Board Stacking Connector, 10 Contact(s), 2 Row(s), Male, Straight, Solder Terminal
72249-016HLF	AMPHENOL	获取价格	Board Connector, LEAD FREE

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