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SN74ACT7806-20DLR Datasheet(PDF) 7 Page - Texas Instruments

No. de pieza SN74ACT7806-20DLR
Descripción Electrónicos  256 횞 18 STROBED FIRST-IN, FIRST-OUT MEMORY
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Fabricante Electrónico  TI [Texas Instruments]
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SN74ACT7806-20DLR Datasheet(HTML) 7 Page - Texas Instruments

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SN74ACT7806
256
× 18
STROBED FIRST-IN, FIRST-OUT MEMORY
SCAS438C – APRIL 1992 – REVISED APRIL 1998
7
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
timing requirements over recommended operating conditions (see Figures 1 through 3)
’ACT7806-20
’ACT7806-25
’ACT7806-40
UNIT
MIN
MAX
MIN
MAX
MIN
MAX
UNIT
fclock
Clock frequency
50
40
25
MHz
LDCK high or low
7
8
12
t
Pulse duration
UNCK high or low
7
8
12
ns
tw
Pulse duration
PEN low
7
8
12
ns
RESET low
10
10
12
D0–D17 before LDCK
5
5
5
tsu
Setup time
PEN before LDCK
5
5
5
ns
LDCK inactive before RESET high
5
6
6
D0–D17 after LDCK
0
0
0
th
Hold time
LDCK inactive after RESET high
5
6
6
ns
th
Hold time
PEN low after LDCK
3
3
3
ns
PEN high after LDCK
0
0
0
switching characteristics over recommended ranges of supply voltage and operating free-air
temperature, CL = 50 pF (unless otherwise noted) (see Figures 5 and 6)
PARAMETER
FROM
TO
’ACT7806-20
’ACT7806-25
’ACT7806-40
UNIT
PARAMETER
(INPUT)
(OUTPUT)
MIN
TYP†
MAX
MIN
MAX
MIN
MAX
UNIT
fmax
LDCK or UNCK
50
40
25
MHz
t d
LDCK
Any Q
9
20
9
22
9
24
ns
tpd
UNCK
Any Q
6
11.5
15
6
18
6
20
ns
tpd‡
UNCK
Any Q
10.5
ns
tPLH
LDCK
EMPTY
6
15
6
17
6
19
ns
UNCK
EMPTY
6
15
6
17
6
19
tPHL
RESET low
EMPTY
4
16
4
18
4
20
ns
PHL
LDCK
FULL
6
15
6
17
6
19
tPLH
UNCK
FULL
6
15
6
17
6
19
ns
tPLH
RESET low
FULL
4
18
4
20
4
22
ns
t d
LDCK
AF/AE
7
18
7
20
7
22
ns
tpd
UNCK
AF/AE
7
18
7
20
7
22
ns
tPLH
RESET low
AF/AE
2
10
2
12
2
14
ns
tPLH
LDCK
HF
5
18
5
20
5
22
ns
tPHL
UNCK
HF
7
18
7
20
7
22
ns
tPHL
RESET low
HF
3
12
3
14
3
16
ns
ten
OE
Any Q
2
9
2
10
2
11
ns
tdis
OE
Any Q
2
10
2
11
2
12
ns
† All typical values are at VCC = 5 V, TA = 25°C.
‡ This parameter is measured at CL = 30 pF (see Figure 4).
operating characteristics, VCC = 5 V, TA = 25°CFigure 2
PARAMETER
TEST CONDITIONS
TYP
UNIT
Cpd
Power dissipation capacitance per FIFO channel
Outputs enabled
CL = 50 pF,
f = 5 MHz
53
pF


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