IDT72V81 IDT [Integrated Device Technology], IDT72V81 Datasheet - Page 10

• Manufacturer Part Number: IDT72V81
• Description: 3.3 Volt CMOS DUAL ASYNCHRONOUS FIFO DUAL 512 x 9, DUAL 1,024 x 9 DUAL 2,048 x 9, DUAL 4,096 X 9
• Manufacturer: IDT [Integrated Device Technology]

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.
DATA
IDT72V81/72V82/72V83/72V84/72V85
DATA
OUT
EF
IN
W
R
R, W, RS
D
0
-D
N
SIDE 1
72V81/72V82/72V83
EXPANSION
72V84/72V85
DEPTH
BLOCK
IDT
Q
Q
D
0
0
0
-Q
-D
-Q
D
Q
FF
t
8
8
8
HF
EF
W
WLZ
A 0-8
R
B 0-8
Figure 17. Read Data Flow-Through Mode
A
B
Figure 15. Compound FIFO Expansion
A
B
B
D
Figure 16. Bidirectional FIFO Mode
9
-D
N
72V81/72V82/72V83
FIFO A
FIFO B
7201A
72V81
72V82
72V83
72V84
72V85
EXPANSION
72V84/72V85
IDT
IDT
t
10
WEF
DEPTH
BLOCK
IDT
Q
D
D
Q
9
9
18
9
t
-D
-Q
A
-Q
-D
17
Q
17
17
D
N
FF
EF
HF
A 0-8
W
A 0-8
R
A
B
B
t
A
A
REF
Commercial Temperature Range
DATA
3966 drw 18
t
72V81/72V82/72V83
RPE
D
(N-8)
EXPANSION
72V84/72V85
DEPTH
BLOCK
OUT
-D
IDT
N
SIDE 2
VALID
Q
Q
D
(N-8)
(N-8)
(N-8)
-Q
-D
-Q
3966 drw 17
N
N
N
3966 drw 19