Datasheet > 72271

72271

更新时间： 2023-12-20 18:44:33

品牌	Logo	应用领域
瑞萨 - RENESAS		先进先出芯片
页数	文件大小	规格书
28页	531K
描述
32K x 9 SuperSync FIFO, 5.0V

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72271 数据手册

IDT72261LA/72271LA SuperSyncFIFO™

16,384 x 9 and 32,768 x 9

COMMERCIALANDINDUSTRIAL

TEMPERATURERANGES

canbeavoidedbycreatingcompositeflags,thatis,ANDingEFofeveryFIFO,

and separately ANDing FF of every FIFO. In FWFT mode, composite flags

canbecreatedbyORingORofeveryFIFO,andseparatelyORingIRofevery

FIFO.

Figure 21 demonstrates a width expansion using two IDT72261LA/

72271LAdevices. D0 -D8 fromeachdeviceforma18-bitwideinputbusand

Q0-Q8 from each device form a 18-bit wide output bus. Any word width can

beattainedbyaddingadditionalIDT72261LA/72271LAdevices.

OPTIONALCONFIGURATIONS

WIDTH EXPANSION CONFIGURATION

Word width may be increased simply by connecting together the control

signalsofmultipledevices. Statusflagscanbedetectedfromanyonedevice.

The exceptions are the EF and FF functions in IDT Standard mode and the

IRandORfunctionsinFWFTmode. Becauseofvariationsinskewbetween

RCLK and WCLK, it is possible for EF/FF deassertion and IR/OR assertion

tovarybyonecyclebetweenFIFOs. InIDTStandardmode,suchproblems

PARTIAL RESET (PRS)

MASTER RESET (MRS)

FIRST WORD FALL THROUGH/

SERIAL INPUT (FWFT/SI)

RETRANSMIT (RT)

Dm+1 - Dn

m + n

D0 - Dm

DATA IN

READ CLOCK (RCLK)

WRITE CLOCK (WCLK)

WRITE ENABLE (WEN)

LOAD (LD)

READ ENABLE (REN)

OUTPUT ENABLE (OE)

IDT

72261LA

72271LA

PROGRAMMABLE (PAE)

72261LA

72271LA

FULL FLAG/INPUT READY (FF/IR)

(1)

EMPTY FLAG/OUTPUT READY (EF/OR) #1

(1)

GATE

FULL FLAG/INPUT READY (FF/IR) #2

GATE

EMPTY FLAG/OUTPUT READY (EF/OR) #2

PROGRAMMABLE (PAF)

HALF-FULL FLAG (HF)

m + n

Qm+1 - Qn

FIFO

DATA OUT

4671 drw 22

Q0 - Qm

NOTES:

1. Use an AND gate in IDT Standard mode, an OR gate in FWFT mode.

2. Do not connect any output control signals directly together.

3. FIFO #1 and FIFO #2 must be the same depth, but may be different word widths.

Figure 19. Block Diagram of 16,384 x 18 and 32,768 x 18 Width Expansion

1...21 22 232425 26 27 28

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与72271相关器件

型号	品牌	描述	获取价格	数据表
72271LA10PFG	IDT	CMOS SuperSync FIFO	获取价格
72271LA10PFG8	IDT	CMOS SuperSync FIFO	获取价格
72271LA10PFGI	IDT	CMOS SuperSync FIFO	获取价格
72271LA10PFGI8	IDT	CMOS SuperSync FIFO	获取价格
72271LA10TFG	IDT	FIFO, 32KX9, 8ns, Synchronous, CMOS, PQFP64, GREEN, STQFP-64	获取价格
72271LA10TFG8	IDT	CMOS SuperSync FIFO	获取价格