L8C201/202/203/204
DEVICES INCORPORATED
512/1K/2K/4K x 9-bit Asynchronous FIFO
SWITCHING CHARACTERISTICS Over Commercial and Industrial Operating Range
FULL/HALF-FULL/EMPTY FLAG TIMING (ns)
L8C201/202/203/204–
25
15
12
10
Symbol Parameter
Min Max Min Max Min Max Min Max
tRHFH
tEHRH
tRHHH
tWHEH
tWLHL
tFHWH
Read High to Full Flag High
25
15
12
10
Read Pulse Width After Empty Flag High
Read High to Half-Full Flag High
25
25
15
15
12
12
10
10
25
25
25
15
15
15
12
12
12
10
10
10
Write High to Empty Flag High
Write Low to Half-Full Flag Low
Write Pulse Width After Full Flag High (Note 9)
EMPTY FLAG TIMING
W
EF
R
t
WHEH
t
EHRH
FULL FLAG TIMING
W
FF
R
t
RHFH
t
FHWH
HALF-FULL FLAG TIMING
HALF-FULL OR LESS
MORE THAN
HALF-FULL
HALF-FULL OR LESS
W
R
OBSOLETE
t
WLHL
tRHHH
HF
FIFO Products
03/04/99–LDS.8C201/2/3/4-H
7
LOGIC [ LOGIC DEVICES INCORPORATED ]
