IDT7206L20LB8_技术文档

IDT7203

IDT7204

IDT7205

IDT7206

IDT7207

IDT7208

CMOS ASYNCHRONOUS FIFO

2,048 x 9, 4,096 x 9

8,192 x 9, 16,384 x 9

32,768 x 9 and 65,536 x 9

•

Industrial temperature range (–40

(plastic packages only)

°C to +85°C) is available

FEATURES:

• First-In/First-Out Dual-Port memory

• 2,048 x 9 organization (IDT7203)

• Green parts available, see ordering information

• 4,096 x 9 organization (IDT7204)

• 8,192 x 9 organization (IDT7205)

• 16,384 x 9 organization (IDT7206)

• 32,768 x 9 organization (IDT7207)

• 65,636 x 9 organization (IDT7208)

• High-speed: 12ns access time

• Low power consumption

DESCRIPTION:

TheIDT7203/7204/7205/7206/7207/7208aredual-portmemorybuffers

withinternalpointersthatloadandemptydataonafirst-in/first-outbasis. The

deviceusesFullandEmptyflagstopreventdataoverflowandunderflowand

expansionlogictoallowforunlimitedexpansioncapabilityinbothwordsizeand

depth.

— Active: 660mW (max.)

— Power-down: 44mW (max.)

DataistoggledinandoutofthedevicethroughtheuseoftheWrite(W)and

Read (R) pins.

• Asynchronous and simultaneous read and write

• Fully expandable in both word depth and width

• 720x family is pin and functionally compatible from 256 x 9 to 64k x 9

• Status Flags: Empty, Half-Full, Full

• Retransmit capability

• High-performance CMOS technology

• Military product compliant to MIL-STD-883, Class B

• Standard Military Drawing for #5962-88669 (IDT7203), 5962-89567

(IDT7203), and 5962-89568 (IDT7204) are listed on this function

The device's 9-bit width provides a bit for a control or parity at the user’s

option. ItalsofeaturesaRetransmit(RT)capabilitythatallowsthereadpointer

to be reset to its initial position when RT is pulsed LOW. A Half-Full Flag is

available in the single device and width expansion modes.

These FIFOs are fabricated using high-speed CMOS technology. They

aredesignedforapplicationsrequiringasynchronousandsimultaneousread/

writesinmultiprocessing,ratebufferingandotherapplications.

MilitarygradeproductismanufacturedincompliancewithMIL-STD-883,

ClassB.

FUNCTIONAL BLOCK DIAGRAM

DATA INPUTS

)

8

0

(D -D

WRITE

CONTROL

W

RAM ARRAY

2,048 x 9

4,096 x 9

8,192 x 9

16,384 x 9

32,768 x 9

65,536 x 9

WRITE

POINTER

READ

POINTER

THREE-

STATE

BUFFERS

RS

DATA OUTPUTS

READ

CONTROL

)

8

(Q₀-Q

RESET

LOGIC

R

FLAG

LOGIC

EF

FF

FL/RT

EXPANSION

LOGIC

XO/HF

XI

2661 drw01

IDTandtheIDTlogoareregisteredtrademarksofIntegratedDeviceTechnology,Inc.

COMMERCIAL,MILITARYANDINDUSTRIALTEMPERATURERANGES

JUNE 2012

1

DSC-2661/18

IDT7203/7204/7205/7206/7207/7208CMOSASYNCHRONOUSFIFO

2,048 x 9, 4,096 x 9, 8,192 x 9, 16,384 x 9, 32,768 x 9 and 65,536 x 9

COMMERCIAL,INDUSTRIALANDMILITARY

TEMPERATURERANGES

PIN CONFIGURATIONS

INDEX

W

Vcc

1

28

27

26

25

24

23

22

21

20

19

18

17

16

15

D8

D

4

2

3

4

5

D

3

29

D

5

D

2

D6

D7

NC

FL/RT

RS

EF

5

6

7

28

27

26

25

24

23

D

2

D1

D

6

D

0

D

1

D

7

8

9

10

11

12

13

XI

D

0

FL/RT

RS

EF

XO/HF

6

7

FF

XI

Q

0

FF

8

9

Q

1

XO/HF

Q

0

NC

Q

7

22

21

Q

1

Q

7

10

11

12

13

14

Q

2

Q

6

Q

2

Q

6

Q

3

Q

5

Q8

Q

4

2661 drw02b

GND

R

2661 drw02a

TOP VIEW

Reference

Identifier

Order

Code

Device

Availability

All devices

Reference

Identifier

Order

Code

Device

Availability

PackageType

PLASTIC DIP

PackageType

PLCC

LCC⁽¹⁾

P28-1

P28-2

D28-1

D28-3

SO28-3

P

J32-1

L32-1

J

L

All devices

PLASTIC THIN DIP

CERDIP

T P

D

AllexceptIDT7207/7208

All except IDT7208

THIN CERDIP

SOIC

TD

SO

OnlyforIDT7203/7204/7205

Only for IDT7204

NOTE:

1. This package is only available in the military temperature range.

RECOMMENDEDDCOPERATING

CONDITIONS

Symbol

Parameter

Min. Typ. Max. Unit

VCC

SupplyVoltage

4.5

5.0

5.5

V

Commercial/Industrial/Military

SupplyVoltage

ABSOLUTEMAXIMUMRATINGS

GND

0

V

Symbol

Rating

Com'l & Ind'l

Military

Unit

(1)

VIH

InputHighVoltage

Commercial/Industrial

2.0

—

VTERM

Terminal

–0.5to+7.0

V

Voltagewith

Respect to GND

(1)

VIH

InputHighVoltageMilitary

2.2

—

V

(2)

VIL

InputLowVoltage

Commercial/Industrial/Military

0.8

TSTG

IOUT

Storage

Temperature

–55 to + 125

–50to+50

–65to+155

–50to+50

°C

TA

OperatingTemperatureCommercial

OperatingTemperatureIndustrial

OperatingTemperatureMilitary

0

—

70

85

°C

DCOutput

+Current

mA

–40

–55

NOTE:

125

1. Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause

permanent damage to the device. This is a stress rating only and functional operation

of the device at these or any other conditions above those indicated in the operational

sections of this specification is not implied. Exposure to absolute maximum rating

conditions for extended periods may affect reliability.

NOTES:

1. For RT/RS/XI input, VIH = 2.6V (commercial).

For RT/RS/XI input, VIH = 2.6V (military).

2. 1.5V undershoots are allowed for 10ns once per cycle.

2

IDT7203/7204/7205/7206/7207/7208CMOSASYNCHRONOUSFIFO

2,048 x 9, 4,096 x 9, 8,192 x 9, 16,384 x 9, 32,768 x 9 and 65,536 x 9

COMMERCIAL,INDUSTRIALANDMILITARY

TEMPERATURERANGES

DCELECTRICALCHARACTERISTICS

(Commercial: VCC = 5V ± 10%, TA = 0°C to +70°C; Industrial: VCC = 5V ± 10%, TA = –40°C to +85°C; Military: VCC = 5V ± 10%, TA = –55°C to +125°C)

IDT7203⁽¹⁾

IDT7203

IDT7204

IDT7204⁽¹⁾

Commercial and Industrial

tA = 12, 15, 20, 25, 35, 50 ns

Military⁽³⁾

tA = 20, 30, 40 ns

Symbol

Parameter

InputLeakageCurrent(AnyInput)

OutputLeakageCurrent

Min.

Typ.

—

Max.

Min.

–1

Typ.

—

Max.

1

Unit

μA

V

(6)

ILI

–1

–10

2.4

—

1

10

—

0.4

120

12

2

(7)

ILO

—

–10

2.4

—

10

VOH

VOL

Output Logic “1” Voltage IOH = –2mA

Output Logic “0” Voltage IOL = 8mA

Active Power Supply Current

StandbyCurrent(R=W=RS=FL/RT=VIH)

Power Down Current

—

0.4

150

25

V

(8,9,10)

ICC1

—

mA

(8,10,11)

ICC2

—

(8,10,12)

ICC3

—

4

IDT7205⁽¹⁾

IDT7206^(2,4)

IDT7207^(2,4)

IDT7208^(2,5)

IDT7205

IDT7206

IDT7207

Commercial and Industrial

tA = 12, 15, 20, 25, 35, 50 ns

Military

tA = 20, 30 ns

Symbol

Parameter

InputLeakageCurrent(AnyInput)

OutputLeakageCurrent

Min.

Typ.

—

Max.

Min.

–1

Typ.

—

Max.

1

Unit

μA

V

(6)

ILI

–1

–10

2.4

—

1

10

—

0.4

120

12

8

(7)

ILO

—

–10

2.4

—

10

VOH

VOL

Output Logic “1” Voltage IOH = –2mA

Output Logic “0” Voltage IOL = 8mA

Active Power Supply Current

StandbyCurrent(RS=FL/RT=VIH)

Power Down Current

—

0.4

150

25

V

(8,9,10)

ICC1

—

mA

(8,10,11)

ICC2

—

(8,10,12)

ICC3

—

12

NOTES:

6. Measurements with 0.4 ≤ VIN ≤ VCC.

7. R ≥ VIH, 0.4 ≤ VOUT ≤ VCC.

1. Industrial temperature range product for 15ns and 25ns speed grades are available

as a standard device.

2. Industrial temperature range product for 25ns speed grade only is available as a standard

device. All other speed grades are available by special order.

3. Military temperature range product for the 40ns is only available for 7203.

4. Commercial temperature range product for the 12ns not available.

5. Commercial temperature range product for the 12ns, 15ns and 50ns not available.

8. Tested with outputs open (IOUT = 0).

9. R and W toggle at 20 MHz and data inputs switch at 10 MHz.

10. ICC measurements are made with outputs open.

11. All Inputs = VCC - 0.2V or GND + 0.2V, except R and W, which toggle at 20MHz.

12. All Inputs = VCC - 0.2V or GND + 0.2V, except R and W = VCC -0.2V.

5V

1.1KΩ

AC TEST CONDITIONS

InputPulseLevels

GND to 3.0V

5ns

InputRise/FallTimes

InputTimingReferenceLevels

OutputReferenceLevels

OutputLoad

1.5V

D.U.T.

SeeFigure1

30pF*

680Ω

CAPACITANCE⁽¹⁾(TA = +25°C, f = 1.0 MHz)

Symbol

Parameter

Condition

VIN = 0V

Max.

10

Unit

pF

2661 drw03

CIN⁽¹⁾

InputCapacitance

OutputCapacitance

or equivalent circuit

COUT^(1,2)

VOUT = 0V

10

pF

NOTES:

Figure 1. Output Load

*Includes jig and scope capacitances.

1. This parameter is sampled and not 100% tested.

2. With output deselected.

3

IDT7203/7204/7205/7206/7207/7208CMOSASYNCHRONOUSFIFO

2,048 x 9, 4,096 x 9, 8,192 x 9, 16,384 x 9, 32,768 x 9 and 65,536 x 9

COMMERCIAL,INDUSTRIALANDMILITARY

TEMPERATURERANGES

ACELECTRICALCHARACTERISTICS⁽¹⁾

(Commercial: VCC = 5V ± 10%, TA = 0°C to +70°C; Industrial: VCC = 5V ± 10%, TA = –40°C to +85°C; Military: VCC = 5V ± 10%, TA = –55°C to +125°C)

Commercial

IDT7203L12

IDT7204L12

IDT7205L12

Com'l & Ind'l

IDT7203L15⁽²⁾

IDT7204L15⁽²⁾

IDT7205L15⁽²⁾

IDT7206L15

IDT7207L15

Com'l & Military

IDT7203L20

IDT7204L20

IDT7205L20

IDT7206L20

IDT7207L20

Commercial

IDT7208L20

Com'l & Ind'l

IDT7203L25⁽²⁾

IDT7204L25⁽²⁾

IDT7205L25⁽²⁾

IDT7206L25⁽³⁾

IDT7207L25⁽³⁾

IDT7208L25⁽³⁾

Symbol

fS

Parameters

ShiftFrequency

Min.

Max.

50

—

12

—

12

—

12

17

20

12

14

—

12

14

17

—

12

—

Min.

—

25

—

10

15

5

Max.

40

—

15

—

15

—

25

15

—

15

25

—

15

—

Min.

—

30

—

10

20

5

Max.

33.3

—

20

—

15

—

30

20

—

20

30

—

20

—

Min.

Max.

33.3

—

20

—

15

—

30

20

—

20

30

—

20

—

Min.

—

35

—

10

25

5

Max.

28.5

—

25

—

18

—

35

25

—

25

35

—

25

—

Unit

MHz

ns

—

20

—

8

—

30

—

10

20

5

tRC

Read Cycle Time

tA

AccessTime

tRR

ReadRecoveryTime

ReadPulseWidth⁽⁴⁾

tRPW

tRLZ

tWLZ

tDV

12

3

Read LOW to Data Bus LOW⁽⁵⁾

Write HIGH to Data Bus Low-Z^(5,6)

Data Valid from Read HIGH

Read HIGH to Data Bus High-Z⁽⁵⁾

Write Cycle Time

3

5

tRHZ

tWC

—

20

12

8

—

25

15

10

11

0

—

30

20

10

12

0

—

30

20

10

12

0

—

35

25

10

15

0

tWPW

tWR

WritePulseWidth⁽⁴⁾

WriteRecoveryTime

DataSet-upTime

tDS

9

tDH

DataHoldTime

0

tRSC

tRS

Reset Cycle Time

ResetPulseWidth⁽⁴⁾

20

12

8

25

15

10

25

15

10

—

15

—

15

—

15

10

30

20

10

30

20

10

—

20

—

20

—

20

10

30

20

10

30

20

10

—

20

—

20

—

20

10

35

25

10

35

25

10

—

25

—

25

—

25

10

tRSS

tRTR

tRTC

tRT

ResetSet-upTime⁽⁵⁾

ResetRecoveryTime

RetransmitCycleTime

RetransmitPulseWidth⁽⁴⁾

RetransmitSet-upTime⁽⁵⁾

RetransmitRecoveryTime

Reset to EF LOW

20

12

8

tRTS

tRTR

tEFL

—

12

—

12

—

12

8

tHFH,tFFH Reset to HF and FF HIGH

tRTF

tREF

tRFF

tRPE

tWEF

tWFF

tWHF

tRHF

tWPF

tXOL

tXOH

tXI

RetransmitLOWtoFlagsValid

Read LOW to EF LOW

Read HIGH to FF HIGH

Read Pulse Width after EF HIGH

Write HIGH to EF HIGH

Write LOW to FF LOW

Write LOW to HF Flag LOW

Read HIGH to HF Flag HIGH

Write Pulse Width after FF HIGH

Read/Write LOW to XO LOW

Read/Write HIGH to XO HIGH

XI Pulse Width⁽⁴⁾

tXIR

XI Recovery Time

XISet-upTime

tXIS

8

NOTES:

1. Timings referenced as in AC Test Conditions.

2. Industrial temperature range product for 15ns and 25ns speed grades are available as a standard device.

3. Industrial temperature range product for 25ns speed grade only is available as a standard device. All other speed grades are available by special order.

4. Pulse widths less than minimum are not allowed.

5. Values guaranteed by design, not currently tested.

6. Only applies to read data flow-through mode.

4

IDT7203/7204/7205/7206/7207/7208CMOSASYNCHRONOUSFIFO

2,048 x 9, 4,096 x 9, 8,192 x 9, 16,384 x 9, 32,768 x 9 and 65,536 x 9

COMMERCIAL,INDUSTRIALANDMILITARY

TEMPERATURERANGES

ACELECTRICALCHARACTERISTICS⁽¹⁾(CONTINUED)

(Commercial: VCC = 5V ± 10%, TA = 0°C to +70°C; Industrial: VCC = 5V ± 10%, TA = –40°C to +85°C; Military: VCC = 5V ± 10%, TA = –55°C to +125°C)

Military

Commercial

IDT7203L35

IDT7204L35

IDT7205L35

IDT7206L35

IDT7207L35

IDT7208L35

Military

IDT7203L40

Commercial

IDT7203L50

IDT7204L50

IDT7205L50

IDT7206L50

IDT7207L50

IDT7203L30

IDT7204L30

IDT7205L30

IDT7206L30

IDT7207L30

Symbol

fS

Parameters

Min.

Max.

25

—

30

—

20

—

40

30

—

30

40

—

30

—

Min.

Max.

Min.

Max.

20

—

40

—

25

—

50

35

—

35

50

—

40

—

Min.

Max.

15

—

50

—

30

—

65

45

—

45

65

—

50

—

Unit

MHz

ns

ShiftFrequency

—

40

—

10

30

5

—

45

—

10

35

5

22.22

—

35

—

20

—

45

30

—

30

45

—

35

—

50

—

10

40

5

—

65

—

15

50

10

15

5

tRC

Read Cycle Time

tA

AccessTime

tRR

ReadRecoveryTime

ReadPulseWidth⁽²⁾

tRPW

tRLZ

tWLZ

tDV

Read LOW to Data Bus LOW⁽³⁾

Write HIGH to Data Bus Low-Z^(3,4)

Data Valid from Read HIGH

Read HIGH to Data Bus High-Z⁽³⁾

Write Cycle Time

5

10

5

10

5

tRHZ

tWC

—

40

30

10

18

0

—

45

35

10

18

0

—

50

40

10

20

0

—

65

50

15

30

5

tWPW

tWR

WritePulseWidth⁽²⁾

WriteRecoveryTime

DataSet-upTime

tDS

tDH

DataHoldTime

tRSC

tRS

Reset Cycle Time

40

30

10

40

30

10

—

30

—

30

—

30

10

45

35

10

45

35

10

—

35

—

35

—

35

10

15

50

40

10

50

40

10

—

40

—

40

—

40

10

15

65

50

15

65

50

15

—

50

—

50

—

50

10

15

ResetPulseWidth⁽²⁾

ResetSet-upTime⁽³⁾

ResetRecoveryTime

RetransmitCycleTime

RetransmitPulseWidth⁽²⁾

RetransmitSet-upTime⁽³⁾

RetransmitRecoveryTime

Reset to EF LOW

tRSS

tRTR

tRTC

tRT

tRTS

tRTR

tEFL

tHFH,tFFH Reset to HF and FF HIGH

tRTF

tREF

tRFF

tRPE

tWEF

tWFF

tWHF

tRHF

tWPF

tXOL

tXOH

tXI

RetransmitLOWtoFlagsValid

Read LOW to EF LOW

Read HIGH to FF HIGH

Read Pulse Width after EF HIGH

Write HIGH to EF HIGH

Write LOW to FF LOW

Write LOW to HF Flag LOW

Read HIGH to HF Flag HIGH

Write Pulse Width after FF HIGH

Read/Write LOW to XO LOW

Read/Write HIGH to XO HIGH

XI Pulse Width⁽²⁾

tXIR

XI Recovery Time

XISet-upTime

tXIS

NOTES:

1. Timings referenced as in AC Test Conditions.

2. Pulse widths less than minimum are not allowed.

3. Values guaranteed by design, not currently tested.

4. Only applies to read data flow-through mode.

5

IDT7203/7204/7205/7206/7207/7208CMOSASYNCHRONOUSFIFO

2,048 x 9, 4,096 x 9, 8,192 x 9, 16,384 x 9, 32,768 x 9 and 65,536 x 9

COMMERCIAL,INDUSTRIALANDMILITARY

TEMPERATURERANGES

loaded(seeOperatingModes).TheSingleDeviceModeisinitiatedbygrounding

the Expansion In (XI).

SIGNALDESCRIPTIONS

INPUTS:

TheIDT7203/7204/7205/7206/7207/7208canbemadetoretransmitdata

when the Retransmit Enable Control (RT) input is pulsed LOW. A retransmit

operationwillsettheinternalreadpointertothefirstlocationandwillnotaffectthe

writepointer. ThestatusoftheFlagswillchangedependingontherelativelocations

ofthereadandwritepointers. ReadEnable(R)andWriteEnable(W)mustbe

intheHIGHstateduringretransmit. Thisfeatureisusefulwhenlessthan2,048/

4,096/8,192/16,384/32,768/65,536writesareperformedbetweenresets. The

retransmitfeatureisnotcompatiblewiththeDepthExpansionMode.

DATA IN (D0–D8) — Data inputs for 9-bit wide data.

CONTROLS:

RESET ( RS ) — Reset is accomplished whenever the Reset (RS) input is

takentoaLOWstate. Duringreset,bothinternalreadandwritepointersareset

tothefirstlocation.Aresetisrequiredafterpower-upbeforeawriteoperationcan

take place. Both the Read Enable (R) and Write Enable (W) inputs must

beintheHIGHstateduringthewindowshowninFigure2(i.e.tRSSbefore

the rising edge of RS) and should not change until tRSR after the rising

edge of RS.

EXPANSIONIN(XI)—Thisinputisadual-purposepin. ExpansionIn(XI)

isgroundedtoindicateanoperationinthesingledevicemode. ExpansionIn(XI)

isconnectedtoExpansionOut(XO)ofthepreviousdeviceintheDepthExpansion

or Daisy-Chain Mode.

OUTPUTS:

WRITEENABLE(W)—Awritecycleisinitiatedonthefallingedgeofthis

inputiftheFullFlag(FF)isnotset.Dataset-upandholdtimesmustbeadhered-

to,withrespecttotherisingedgeoftheWriteEnable(W).DataisstoredintheRAM

array sequentially and independently of any on-going read operation.

Afterhalfofthememoryisfilled,andatthefallingedgeofthenextwriteoperation,

theHalf-FullFlag(HF)willbesettoLOW,andwillremainsetuntilthedifference

betweenthewritepointerandreadpointerisless-thanorequaltoone-halfofthe

totalmemoryofthedevice.TheHalf-FullFlag(HF)isthenresetbytherisingedge

ofthereadoperation.

FULLFLAG(FF)—TheFullFlag(FF)willgoLOW,inhibitingfurtherwrite

operations,whenthedeviceisfull. IfthereadpointerisnotmovedafterReset(RS),

the Full Flag (FF) will go LOW after 2,048/4,096/8,192/16,384/32,768/65,536

writes.

EMPTYFLAG(EF)—TheEmptyFlag(EF)willgoLOW,inhibitingfurther

readoperations,whenthereadpointerisequaltothewritepointer,indicatingthat

thedeviceisempty.

Topreventdataoverflow,theFullFlag(FF)willgoLOWonthefallingedge

ofthelastwritesignal,whichinhibitsfurtherwriteoperations. Uponthecompletion

of a valid read operation, the Full Flag (FF) will go HIGH after tRFF, allowing a

newvalidwritetobegin.WhentheFIFOisfull,theinternalwritepointerisblocked

fromW, soexternalchangesinWwillnotaffecttheFIFOwhenitisfull.

EXPANSIONOUT/HALF-FULLFLAG(XO/HF)—Thisisadual-purpose

output. Inthesingledevicemode,whenExpansionIn(XI)isgrounded,thisoutput

actsasanindicationofahalf-fullmemory.

Afterhalfofthememoryisfilled,andatthefallingedgeofthenextwriteoperation,

theHalf-FullFlag(HF)willbesettoLOWandwillremainsetuntilthedifference

betweenthewritepointerandreadpointerislessthanorequaltoonehalfofthe

totalmemoryofthedevice. TheHalf-FullFlag(HF)isthenresetbytherisingedge

ofthereadoperation.

IntheDepthExpansionMode,ExpansionIn(XI)isconnectedtoExpansion

Out(XO)ofthepreviousdevice. Thisoutputactsasasignaltothenextdevice

intheDaisyChainbyprovidingapulsetothenextdevicewhenthepreviousdevice

reachesthelastlocationofmemory. TherewillbeanXOpulsewhentheWrite

pointerreachesthelastlocationofmemory,andanadditionalXOpulsewhenthe

Readpointerreachesthelastlocationofmemory.

READENABLE(R)—A readcycleisinitiatedonthefallingedgeoftheRead

Enable (R), provided the Empty Flag (EF) is not set. The data is accessed on

aFirst-In/First-Outbasis,independentofanyongoingwriteoperations. AfterRead

Enable (R) goes HIGH, the Data Outputs (Q0 through Q8) will return to a high-

impedanceconditionuntilthenextReadoperation. Whenallthedatahasbeen

read from the FIFO, the Empty Flag (EF) will go LOW, allowing the “final” read

cyclebutinhibitingfurtherreadoperations,withthedataoutputsremaininginahigh-

impedancestate.Onceavalidwriteoperationhasbeenaccomplished,theEmpty

Flag (EF) will go HIGH after tWEF and a valid Read can then begin. When the

FIFOisempty,theinternalreadpointerisblockedfromRsoexternalchangeswill

notaffecttheFIFOwhenitisempty.

DATA OUTPUTS (Q0-Q8) — Q0-Q8 are data outputs for 9-bit wide data.

Theseoutputsareinahigh-impedanceconditionwheneverRead(R)isinaHIGH

state.

FIRST LOAD/RETRANSMIT ( FL/RT )— This is a dual-purpose input. In

theDepthExpansionMode,thispinisgroundedtoindicatethatitisthefirstdevice

6

IDT7203/7204/7205/7206/7207/7208CMOSASYNCHRONOUSFIFO

2,048 x 9, 4,096 x 9, 8,192 x 9, 16,384 x 9, 32,768 x 9 and 65,536 x 9

COMMERCIAL,INDUSTRIALANDMILITARY

TEMPERATURERANGES

tRSC

tRS

RS

W

tRSS

tRSR

tRSS

R

tEFL

EF

tHFH,

tFFH

HF, FF

2661 drw04

NOTE:

1. W and R = VIH around the rising edge of RS.

Figure 2. Reset

tRC

tRPW

tRR

tA

R

t

DV

tRHZ

tRLZ

Q0-Q8

OUT

VALID

OUT

DATA

VALID

tWC

tWR

tWPW

W

tDS

tDH

D0-D8

IN

DATA VALID

DATA

VALID

2661 drw05

Figure 3. Asynchronous Write and Read Operation

IGNORED

WRITE

LAST WRITE

FIRST READ

R

W

t

RFF

t

WFF

FF

2661 drw06

Figure 4. Full Flag Timing From Last Write to First Read

7

IDT7203/7204/7205/7206/7207/7208CMOSASYNCHRONOUSFIFO

2,048 x 9, 4,096 x 9, 8,192 x 9, 16,384 x 9, 32,768 x 9 and 65,536 x 9

COMMERCIAL,INDUSTRIALANDMILITARY

TEMPERATURERANGES

IGNORED

READ

LAST READ

FIRST WRITE

W

R

tWEF

t

REF

EF

tA

OUT

VALID

Figure 5. Empty Flag Timing From Last Read to First Write

DATA

2661 drw07

t

RTC

tRT

RT

t

RTS

tRTR

W,R

t

RTF

FLAG VALID

HF, EF, FF

2661 drw08

NOTE:

1. EF, FF and HF may change status during Retransmit, but flags will be valid at tRTC.

Figure 6. Retransmit

W

tWEF

EF

R

tRPE

2661 drw09

Figure 7. Minimum Timing for an Empty Flag Coincident Read Pulse.

R

t

RFF

FF

W

tWPF

2661 drw10

Figure 8. Minimum Timing for a Full Flag Coincident Write Pulse.

8

IDT7203/7204/7205/7206/7207/7208CMOSASYNCHRONOUSFIFO

2,048 x 9, 4,096 x 9, 8,192 x 9, 16,384 x 9, 32,768 x 9 and 65,536 x 9

COMMERCIAL,INDUSTRIALANDMILITARY

TEMPERATURERANGES

W

R

tWHF

tRHF

HALF-FULL OR LESS

HF

HALF-FULL OR LESS

MORE THAN HALF-FULL

2661 drw11

Figure 9. Half-Full Flag Timing

WRITE TO

LAST PHYSICAL

LOCATION

W

R

READ FROM

LAST PHYSICAL

LOCATION

tXOL

tXOH

tXOL

tXOH

XO

2661 drw12

Figure 10. Expansion Out

tXI

tXIR

XI

tXIS

WRITE TO

FIRST PHYSICAL

LOCATION

W

R

tXIS

READ FROM

FIRST PHYSICAL

LOCATION

2661 drw13

Figure 11. Expansion In

7204/7205/7206/7207/7208s. ThesedevicesoperateintheDepthExpansion

modewhenthefollowingconditionsaremet:

OPERATINGMODES:

Care must be taken to assure that the appropriate flag is monitored by

eachsystem(i.e.FFismonitoredonthedevicewhereWisused;EFismonitored

onthedevicewhereRisused).ForadditionalinformationontheIDT7203/7204/

7205/7206/7207, refer to Tech Note 8: Operating FIFOs on Full and Empty

Boundary Conditions and Tech Note 6: Designing with FIFOs.

Single Device Mode

1. ThefirstdevicemustbedesignatedbygroundingtheFirstLoad(FL)control

input.

2. All other devices must have FLin the HIGH state.

3. TheExpansionOut(XO)pinofeachdevicemustbetiedtotheExpansion

In (XI) pin of the next device. See Figure 14.

4. ExternallogicisneededtogenerateacompositeFullFlag(FF)andEmpty

Flag(EF). ThisrequirestheORingofallEFsandORingofallFFs(i.e. all

mustbesettogeneratethecorrectcomposite FForEF). SeeFigure14.

5. TheRetransmit(RT)functionandHalf-FullFlag(HF)arenotavailablein

theDepthExpansionMode.

A single IDT7203/7204/7205/7206/7207/7208 may be used when the

applicationrequirementsarefor2,048/4,096/8,192/16,384/32,768/65,536words

or less. These FIFOs are in a Single Device Configuration when the Expansion

In (XI) control input is grounded (see Figure 12).

Depth Expansion

These FIFOs can easily be adapted to applications when the require-

mentsareforgreaterthan2,048/4,096/8,192/16,384/32,768/65,536words.

Figure14demonstratesDepthExpansionusingthreeIDT7203/7204/7205/

7206/7207/7208s. AnydepthcanbeattainedbyaddingadditionalIDT7203/

For additional information on the IDT7203/7204/7205/7206/7207, refer to

Tech Note 9: Cascading FIFOs or FIFO Modules.

9

IDT7203/7204/7205/7206/7207/7208CMOSASYNCHRONOUSFIFO

2,048 x 9, 4,096 x 9, 8,192 x 9, 16,384 x 9, 32,768 x 9 and 65,536 x 9

COMMERCIAL,INDUSTRIALANDMILITARY

TEMPERATURERANGES

FIFOpermitsareadingofasinglewordafterwritingonewordofdataintoan

empty FIFO. The data is enabled on the bus in (tWEF + tA) ns after the rising

edgeofW,calledthefirstwriteedge,anditremainsonthebusuntiltheRline

israisedfromLOW-to-HIGH, afterwhichthebuswouldgointoathree-state

mode after tRHZ ns. The EF line would have a pulse showing temporary

deassertionandthenwouldbeasserted.

Inthewriteflow-throughmode(Figure18),theFIFOpermitsthewritingof

asinglewordofdataimmediatelyafterreadingonewordofdatafromafullFIFO.

TheRlinecausestheFFtobedeassertedbuttheWlinebeingLOWcauses

ittobeassertedagaininanticipationofanewdataword.Ontherisingedgeof

W, the new word is loaded in the FIFO. The Wline must be toggled when FF

isnotassertedtowritenewdataintheFIFOandtoincrementthewritepointer.

USAGEMODES:

Width Expansion

Wordwidthmaybeincreasedsimplybyconnectingthecorrespondinginput

controlsignalsofmultipledevices. Statusflags(EF,FFandHF)canbedetected

fromanyonedevice. Figure13demonstratesan18-bitwordwidthbyusing

twoIDT7203/7204/7205/7206/7207/7208s. Anywordwidthcanbeattained

by adding additional IDT7203/7204/7205/7206/7207/7208s (Figure 13).

Bidirectional Operation

Applications which require data buffering between two systems (each

system capable of Read and Write operations) can be achieved by pairing

IDT7203/7204/7205/7206/7207/7208s as shown in Figure 16. Both Depth

ExpansionandWidthExpansionmaybeusedinthismode.

Compound Expansion

Thetwoexpansiontechniquesdescribedabovecanbeappliedtogether

in a straightforward manner to achieve large FIFO arrays (see Figure 15).

Data Flow-Through

Twotypesofflow-throughmodesarepermitted,areadflow-throughand

write flow-through mode. For the read flow-through mode (Figure 17), the

(HALF-FULL FLAG)

WRITE (W)

(HF)

READ (R)

9

IDT

7203

7204

7205

7206

7207

7208

9

DATA IN (D)

FULL FLAG (FF)

RESET (RS)

DATA OUT (Q)

EMPTY FLAG (EF)

RETRANSMIT (RT)

2661 drw14

EXPANSION IN (XI)

Figure 12. Block Diagram of 2,048 x 9, 4,096 x 9, 8,192 x 9, 16,384 x 9, 32,768 x 9, 65,536 x 9 FIFO Used in Single Device Mode

HF

18

9

DATA IN (D)

IDT

WRITE (W)

IDT

READ (R)

7203

7204

7205

7206

7207

7208

7203

7204

7205

7206

7207

7208

FULL FLAG (FF)

RESET (RS)

EMPTY FLAG (EF)

RETRANSMIT (RT)

9

XI

18

OUT (Q)

DATA

NOTE:

2661 drw15

1. Flag detection is accomplished by monitoring the FF, EF and HF signals on either (any) device used in the width expansion configuration.

Do not connect any output signals together.

Figure 13. Block Diagram of 2,048 x 18, 4,096 x 18, 8,192 x 18, 16,384 x 18, 32,768 x 18, 65,536 x 18 FIFO Memory Used in Width Expansion Mode

10

IDT7203/7204/7205/7206/7207/7208CMOSASYNCHRONOUSFIFO

2,048 x 9, 4,096 x 9, 8,192 x 9, 16,384 x 9, 32,768 x 9 and 65,536 x 9

COMMERCIAL,INDUSTRIALANDMILITARY

TEMPERATURERANGES

TRUTHTABLES

TABLE 1 – RESET AND RETRANSMIT

SINGLEDEVICECONFIGURATION/WIDTHEXPANSIONMODE

Inputs

InternalStatus

Write Pointer

Outputs

Mode

RS

FL/RT

XI

Read Pointer

EF

FF

HF

Reset

0

1

X

0

1

0

LocationZero

Increment⁽¹⁾

LocationZero

Unchanged

Increment⁽¹⁾

0

X

1

X

1

X

Retransmit

Read/Write

NOTE:

1. Pointer will Increment if flag is HIGH.

TABLE 2 – RESET AND FIRST LOAD

DEPTHEXPANSION/COMPOUNDEXPANSIONMODE

Inputs

InternalStatus

Outputs

Mode

RS

FL/RT

XI

Read Pointer

Write Pointer

EF

FF

ResetFirstDevice

Reset All Other Devices

Read/Write

0

1

0

1

X

(1)

LocationZero

X

LocationZero

X

0

X

1

X

NOTES:

1. XI is connected to XO of previous device. See Figure 14.

2. RS = Reset Input, FL/RT = First Load/Retransmit, EF = Empty Flag Output, FF = Full Flag Output, XI = Expansion Input, HF = Half-Full Flag Output

XO

IDT

7203

R

W

FF

EF

FL

7204

7205

7206

7207

7208

Q

D

9

V

CC

XI

XO

IDT

FF

EF

FL

7203

7204

7205

7206

7207

7208

EMPTY

FULL

9

XI

XO

IDT

FF

EF

7203

7204

7205

7206

7207

7208

9

RS

FL

XI

2661 drw16

Figure 14. Block Diagram of 6,144 x 9, 12,288 x 9, 24,576 x 9, 49,152 x 9, 98,304 x 9, 196,608 x 9 FIFO Memory (Depth Expansion)

11

IDT7203/7204/7205/7206/7207/7208CMOSASYNCHRONOUSFIFO

2,048 x 9, 4,096 x 9, 8,192 x 9, 16,384 x 9, 32,768 x 9 and 65,536 x 9

COMMERCIAL,INDUSTRIALANDMILITARY

TEMPERATURERANGES

Q(N-8)-Q

N

Q9-Q17

Q0-Q8

Q9-Q17

Q0-Q8

Q(N-8)-Q

N

IDT7203

IDT7204

IDT7205

IDT7206

IDT7207

IDT7208

DEPTH

IDT7203

IDT7204

IDT7205

IDT7206

IDT7207

IDT7208

DEPTH

IDT7203

IDT7204

IDT7205

IDT7206

IDT7207

IDT7208

DEPTH

R, W, RS

EXPANSION

BLOCK

EXPANSION

BLOCK

EXPANSION

BLOCK

D0-D8

D9-D17

D(N-8)-DN

D0-DN

2661 drw17

D9-DN

D18-D

N

D(N-8)-DN

NOTES:

1. For depth expansion block see section on Depth Expansion and Figure 14.

2. For Flag detection see section on Width Expansion and Figure 13..

Figure 15. Compound FIFO Expansion

IDT

R

EF

HF

B

W

A

7203

7204

B

IDT

7205

FF

A

7201A

B

7206

7207

7208

QB 0-8

DA 0-8

SYSTEM A

SYSTEM B

Q

A 0-8

D

B 0-8

IDT

7203

7204

7205

7206

7207

7208

R

HF

EF

A

WB

A

2661 drw18

FFB

A

Figure 16. Bidirectional FIFO Operation

12

IDT7203/7204/7205/7206/7207/7208CMOSASYNCHRONOUSFIFO

2,048 x 9, 4,096 x 9, 8,192 x 9, 16,384 x 9, 32,768 x 9 and 65,536 x 9

COMMERCIAL,INDUSTRIALANDMILITARY

TEMPERATURERANGES

IN

DATA

W

R

tRPE

EF

tWEF

t

REF

tWLZ

tA

DATA OUT

DATA OUT VALID

2661 drw19

Figure 17. Read Data Flow-Through Mode

R

W

tWPF

t

RFF

FF

tDH

t

WFF

DATA IN

DATA IN VALID

tA

tDS

DATA OUT

DATA OUT VALID

2661 drw20

Figure 18. Write Data Flow-Through Mode

13

ORDERING INFORMATION

X

XXXX

X

XX

X

Device Type Power

Speed

Package

Process/

Temperature

Range

Blank

8

Tube or Tray

Tape and Reel

Blank

I⁽¹⁾

B

Commercial (0°C to +70°C)

Industrial (−40° to +85°C)

Military (−55°C to +125°C)

Compliant to MIL-STD-883, Class B

G⁽⁴⁾

Green

P⁽⁵⁾

TP

D

Plastic DIP

Plastic Thin DIP

CERDIP

Thin CERDIP

Plastic Leaded Chip Carrier PLCC J32-1

Leadless Chip Carrier

Small Outline IC

P28-1

P28-2

D28-1

D28-3

(all except 7207/7208)

(all except 7208)

(only for 7203/7204/7205)

TD

J

L⁽²⁾

SO

LCC

L32-1

(all except 7208)

SOIC SO28-3 (only 7204)

12

15

Commercial 7203/04/05 Only

Commercial and (Industrial only 7203/04/05)

Commercial and Military

Commercial and Industrial

Military Only

Commercial Only

Military 7203 Only

20⁽³⁾

25⁽³⁾

30

Access Time (t

A)

Speed in

Nanoseconds

35⁽³⁾

40

50

Commercial Only

Low Power

L

7203 ⎯ 2,048 x9 FIFO

7204 ⎯ 4,096 x 9 FIFO

7205 ⎯ 8,192 x 9 FIFO

7206 ⎯ 16,384 x 9 FIFO

7207

7208⁽

⎯

32,768 x 9 FIFO

65,536 x 9 FIFO

3)

2661 drw21

NOTES:

1. Industrial temperature range product for 15ns and 25ns speed grades are available as a standard device for IDT7203/7204/7205, and 25ns speed grade only is available

as a standard device for IDT7206/7207/7208. All other speed grades are available by special order.

2. The LCC is only available in the military temperature range.

3. The IDT7208 is only available in commercial speed grades of 20, 25 and 35 ns.

4. Green parts are available. For specific speeds and packages contact your local sales office.

5. For "P", Plastic Dip, when ordering green package, the suffix is "PDG".

DATASHEETHISTORY

05/10/2001

05/30/2001

04/03/2006

10/22/2008

04/22/2010

06/29/2012

pgs. 2, 3, 4, 5, 11 and 14.

pg. 2.

pgs. 1 and 14.

pg. 14.

pgs. 3, 4 and 14.

pgs. 1 and 14.

CORPORATE HEADQUARTERS

6024 Silver Creek Valley Road

San Jose, CA 95138

for SALES:

for Tech Support:

408-360-1753

email:FIFOhelp@idt.com

800-345-7015 or 408-284-8200

fax: 408-284-2775

www.idt.com

14


型号：	IDT7206L20LB8
厂家：	INTEGRATED DEVICE TECHNOLOGY
描述：	FIFO, 16KX9, 20ns, Asynchronous, CMOS, LCC-32 先进先出芯片
文件：	总14页 (文件大小：305K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

IDT7206L20LB8 [IDT]

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