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CY7C441
CY7C443
Document #: 38-06032 Rev. *A
Page 13 of 15
Table 4. Almost Full Flag Operation Example[29,30]
Status Before Operation
Status After Operation
Current State
of FIFO
F1
F2
Number
of Words
in FIFO
CY7C441
Number
of Words
in FIFO
CY7C443
Operation
Next State
of FIFO
F1
F2
Number of
Words in
FIFO
CY7C441
Number of
Words in
FIFO
CY7C443
Comments
AF
0
1
496
2032
Read
(ENR=LOW)
AF
0
1
495
2031
Read
AF
0
1
495
2031
Read
(ENR=LOW)
AF
0
1
494
2030
Read
AF
0
1
494
2030
Write
(ENW=HIGH)
Intermediate
1
1
494
2030
Flag
Update
Intermediate
1
1
494
2030
Write
(ENW=LOW)
Intermediate
1
1
495
2031
Write
Intermediate
1
1
495
2031
Write
(ENW=LOW)
AF
0
1
496
2032
Write
(Transition
from Inter-
mediate
toAlmost
Full)
Note:
29. The CY7C441 Almost Full state is represented by 496 or more words.
30. The CY7C443 Almost Full state is represented by 2032 or more words.
Ordering Information
512x9 Clocked FIFO
Speed
(ns)
Ordering Code
Package
Name
Package Type
Operating
Range
12
CY7C441–12JC
J65
32-Lead Plastic Leaded Chip Carrier
Commercial
CY7C441–12JI
J65
32-Lead Plastic Leaded Chip Carrier
Industrial
14
CY7C441–14JC
J65
32-Lead Plastic Leaded Chip Carrier
Commercial
CY7C441–14JI
J65
32-Lead Plastic Leaded Chip Carrier
Industrial
20
CY7C441–20JC
J65
32-Lead Plastic Leaded Chip Carrier
Commercial
CY7C441–20JI
J65
32-Lead Plastic Leaded Chip Carrier
Industrial
30
CY7C441–30JC
J65
32-Lead Plastic Leaded Chip Carrier
Commercial
CY7C441–30JI
J65
32-Lead Plastic Leaded Chip Carrier
Industrial
2Kx9 Clocked FIFO
Speed
(ns)
Ordering Code
Package
Name
Package Type
Operating
Range
12
CY7C443–12JC
J65
32-Lead Plastic Leaded Chip Carrier
Commercial
CY7C443–12JI
J65
32-Lead Plastic Leaded Chip Carrier
Industrial
14
CY7C443–14JC
J65
32-Lead Plastic Leaded Chip Carrier
Commercial
CY7C443–14JI
J65
32-Lead Plastic Leaded Chip Carrier
Industrial
20
CY7C443–20JC
J65
32-Lead Plastic Leaded Chip Carrier
Commercial
CY7C443–20JI
J65
32-Lead Plastic Leaded Chip Carrier
Industrial
30
CY7C443–30JC
J65
32-Lead Plastic Leaded Chip Carrier
Commercial
CY7C443–30JI
J65
32-Lead Plastic Leaded Chip Carrier
Industrial
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