L8C201/202/203/204
DEVICES INCORPORATED
512/1K/2K/4K x 9-bit Asynchronous FIFO
SWITCHING CHARACTERISTICS
Over Commercial and Industrial Operating Range
F
ULL
/E
MPTY
F
LAG AND
R
ETRANSMIT
T
IMING
(ns)
L8C201/202/203/204–
25
Symbol
t
RLQV
t
RLEL
t
RHFH
t
WHEH
t
WLFL
t
TLAL
t
TLTH
t
AHTH
t
THAL
Parameter
Read Low to Output Valid
(Access Time)
Read Low to Empty Flag Low
Read High to Full Flag High
Write High to Empty Flag High
Write Low to Full Flag Low
Retransmit Cycle Time
Retransmit Low to End of Retransmit Cycle
(Notes 8, 9, 10)
Read/Write High to Retransmit High
(Notes 8, 9, 10)
Retransmit High to Read/Write Low
(Note 9)
35
Min
Max
25
25
25
25
25
25
15
Min
Max
15
15
15
15
15
20
Min
12
Max
12
12
12
12
12
15
10
10
5
10
Min
Max
10
10
10
10
10
F
ULL
F
LAG FROM
L
AST
W
RITE TO
F
IRST
R
EAD
LAST WRITE
R
W
t
WLFL
FF
E
MPTY
F
LAG FROM
L
AST
R
EAD TO
F
IRST
W
RITE
LAST READ
IGNORED
READ
BS
O
t
RLEL
t
WHEH
t
RLQV
VALID
LE
t
RHFH
FIRST WRITE
ADDITIONAL
WRITES
t
TLAL
t
TLTH
t
AHTH
6
IGNORED
WRITE
FIRST READ
ADDITIONAL
READS
W
R
EF
DATA
OUT
O
R
ETRANSMIT
RT
W, R
HF, EF, FF
TE
25
25
10
15
15
10
12
12
8
ADDITIONAL
WRITES
FIRST READ
VALID
t
THAL
FLAG VALID
FIFO Products
03/04/99–LDS.8C201/2/3/4-H
LOGIC [ LOGIC DEVICES INCORPORATED ]
