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IDT72021L40DB Datasheet(PDF) 10 Page - Integrated Device Technology |
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IDT72021L40DB Datasheet(HTML) 10 Page - Integrated Device Technology |
10 / 14 page 5.09 10 MILITARY AND COMMERCIAL TEMPERATURE RANGES IDT72021, IDT72031, IDT72041 CMOS ASYNCHRONOUS FIFO WITH RETRANSMIT 1K x 9, 2K x 9, 4K x 9 R W XO 2677 drw 14 WRITE TO LAST PHYSICAL LOCATION t XOL t XOH READ FROM LAST PHYSICAL LOCATION t XOL t XOH Figure 11. Expansion Out W XI R 2677 drw 15 WRITE TO FIRST PHYSICAL LOCATION READ FROM FIRST PHYSICAL LOCATION t XIS t XIR t XI t XIS Figure 12. Expansion In OPERATING CONFIGURATIONS SINGLE DEVICE CONFIGURATION The IDT72021/031/041 is in the Single Device Configuration when the Expansion In ( XI) control input is grounded (see Figure 13). WRITE (W) DATA IN (D) FULL FLAG (FF) RESET (RS) 9 READ (R) 9 DATA OUT (Q) EMPTY FLAG (EF) RETRANSMIT (RT) OUTPUT ENABLE (OE) EXPANSION IN (XI) HF AEF 2677 drw 16 IDT 72021/031/041 (HALF–FULL FLAG) Figure 13. Block Diagram of Single 1K/2K/4K x 9 FIFO |
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