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SN74ACT7202LA25NP bảng dữ liệu(PDF) 8 Page - Texas Instruments

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Giải thích chi tiết về linh kiện  256 횞 9, 512 횞 9, 1024 횞 9 ASYNCHRONOUS FIRST-IN, FIRST-OUT MEMORIES
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SN74ACT7200L, SN74ACT7201LA, SN74ACT7202LA
256
× 9, 512 × 9, 1024 × 9
ASYNCHRONOUS FIRST-IN, FIRST-OUT MEMORIES
SCAS221A – FEBRUARY 1993 – REVISED SEPTEMBER 1995
8
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
timing requirements over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted)
FIGURE
′ACT7200L-15
′ACT7201LA-15
′ACT7202LA-15
′ACT7200L-25
′ACT7201LA-25
′ACT7202LA-25
′ACT7201LA-35†
′ACT7202LA-35†
′ACT7200L-50
′ACT7201LA-50
′ACT7202LA-50
UNIT
MIN
MAX
MIN
MAX
MIN
MAX
MIN
MAX
fclock
Clock frequency, R or W
40
28.5
22.2
15
MHz
tc(R)
Cycle time, read
1(a)
25
35
45
65
ns
tc(W)
Cycle time, write
1(b)
25
35
45
65
ns
tc(RS)
Cycle time, reset
7
25
35
45
65
ns
tc(RT)
Cycle time, retransmit
4
25
35
45
65
ns
tw(RL)
Pulse duration, R low
1(a)
15
25
35
50
ns
tw(WL)
Pulse duration, W low
1(b)
15
25
35
50
ns
tw(RH)
Pulse duration, R high
1(a)
10
10
10
15
ns
tw(WH)
Pulse duration, W high
1(b)
10
10
10
15
ns
tw(RT)
Pulse duration, FL/RT low
4
15
25
35
50
ns
tw(RS)
Pulse duration, RS low
7
15
25
35
50
ns
tw(XIL)
Pulse duration, XI low
10
15
25
35
50
ns
tw(XIH)
Pulse duration, XI high
10
10
10
10
10
ns
tsu(D)
Setup time, data before W
1(b), 6
11
15
18
30
ns
tsu(RT)
Setup time, R and W high
before FL/RT
↑‡
4
15
25
35
50
ns
tsu(RS)
Setup time, R and W high
before RS
↑‡
7
15
25
35
50
ns
tsu(XI-R)
Setup time, XI low
before R
10
10
10
10
15
ns
tsu(XI-W)
Setup time, XI low
before W
10
10
10
10
15
ns
th(D)
Hold time, data after W
1(b), 6
0
0
0
5
ns
th(E-R)
Hold time, R low after EF
5, 11
15
25
35
50
ns
th(F-W)
Hold time, W low after FF
6, 12
15
25
35
50
ns
th(RT)
Hold time, R and W high
after FL/RT
4
10
10
10
15
ns
th(RS)
Hold time, R and W high
after RS
7
10
10
10
15
ns
† Released in RJ package only
‡ These values are characterized but not currently tested.


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