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IDT72205LB

CMOS SyncFIFO 256 x 18, 512 x 18, 1024 x 18, 2048 x 18 and 4096 x 18

Integrated Device Technology 

IDT72205LB/72215LB/72225LB/72235LB/72245LB CMOS SyncFIFO™

256 x 18, 512 x 18, 1024 x 18, 2048 x 18 and 4096 x 18

MILITARY AND COMMERCIAL TEMPERATURE RANGES

WXI

WCLK

t XI

t XIS

Figure 18. Write Expansion In Timing

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t XI

RXI

RCLK

t XIS

Figure 19. Read Expansion In Timing

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OPERATING CONFIGURATIONS

SINGLE DEVICE CONFIGURATION

A single IDT72205LB/72215LB/72225LB/72235LB/

72245LB may be used when the application requirements are

for 256/512/1024/2048/4096 words or less. The IDT72205LB/

72215LB/72225LB/72235LB/72245LB are in a single Device

Configuration when the Write Exansion In (WXI), Read Ex-

pansion In (RXI), and First Load (FL) control inputs are

grounded (Figure 20).

WRITE CLOCK (WCLK)

WRITE ENABLE (WEN)

LOAD (LD)

DATA IN (D0 - D17)

FULL FLAG (FF)

PROGRAMMABLE (PAE)

HALF-FULL FLAG (HF)

RESET (RS)

IDT

72205LB/

72215LB/

72225LB/

72235LB/

72245LB

READ CLOCK (RCLK)

READ ENABLE (REN)

OUTPUT ENABLE (OE)

DATA OUT (Q0 - Q17)

EMPTY FLAG (EF)

PROGRAMMABLE (PAF)

FIRST LOAD (FL)

READ EXPANSION IN (RXI)

WRITE EXPANSION IN (WXI)

Figure 20. Block Diagram of Single 256 x 18/512 x 18/1024 x 18/2048 x 18/4096 x 18 Synchronous FIFO

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5.16

18

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