5.09

13

MILITARY AND COMMERCIAL TEMPERATURE RANGES

IDT72021, IDT72031, IDT72041

CMOS ASYNCHRONOUS FIFO WITH RETRANSMIT 1K x 9, 2K x 9, 4K x 9

Figure 16. Compound FIFO Expansion

NOTE:

1. Assume

OE is asserted LOW.

IDT72021/

031/041

DEPTH

EXPANSION

BLOCK

IDT72021/

031/041

DEPTH

EXPANSION

BLOCK

IDT72021/

031/041

DEPTH

EXPANSION

BLOCK

R, W, RS

•••

•••

•••

2677 drw 19

NOTES:

1. For depth expansion block see section od Depth Expansion and Figure 15.

2. For Flag detection see section on Width Expansion and Figure 14.

Figure 18. Read Data Flow-Through Mode

2677 drw 21

DATA OUT VALID

EF

R

W

(1)

Figure 17. Bidirectional FIFO Mode

IDT

7201A

SYSTEM A

SYSTEM B

2677 drw 20

IDT

72021/

031/041

AEF

IDT

72021/

031/041

AEF