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參數(shù)資料
| 型號： | AC74 |
| 廠商： | Texas Instruments, Inc. |
| 元件分類： | 通用總線功能 |
| 英文描述： | DUAL POSITIVE-EDGE-TRIGGERED D-TYPE FLIP-FLOPS WITH CLEAR AND PRESET |
| 中文描述： | 雙上升沿觸發(fā)的，有清除和預設功能的D型觸發(fā)器 |
| 文件頁數(shù)： | 5/17頁 |
| 文件大?。?/td> | 531K |
| 代理商： | AC74 |
SCAS521F AUGUST 1995 REVISED OCTOBER 2003
5
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
timing requirements over recommended operating free-air temperature range,
V
CC
= 5 V
0.5 V (unless otherwise noted) (see Figure 1)
TA = 25
°
C
MIN
SN54AC74
MIN
SN74AC74
MIN
UNIT
MAX
MAX
MAX
fclock
Clock frequency
140
95
125
MHz
tw
Pulse duration
PRE or CLR low
4.5
5.5
5
ns
CLK
4.5
5.5
5
tsu
Setup time, data before CLK
↑
Data
3
4
3
ns
PRE or CLR inactive
0
0.5
0
th
Hold time, data after CLK
↑
0.5
0.5
0.5
ns
switching characteristics over recommended operating free-air temperature range,
V
CC
= 3.3 V
0.3 V (unless otherwise noted) (see Figure 1)
PARAMETER
FROM
(INPUT)
TO
TA = 25
°
C
TYP
SN54AC74
MIN
SN74AC74
MIN
UNIT
(OUTPUT)
MIN
MAX
MAX
MAX
fmax
tPLH
tPHL
tPLH
tPHL
100
125
70
95
MHz
PRE or CLR
Q or Q
3.5
8
12
1
13
2.5
13
ns
4
10.5
12
1
14
3.5
13.5
CLK
Q or Q
4.5
8
13.5
1
17.5
4
16
ns
3.5
8
14
1
13.5
3.5
14.5
switching characteristics over recommended operating free-air temperature range,
V
CC
= 5 V
0.5 V (unless otherwise noted) (see Figure 1)
PARAMETER
FROM
(INPUT)
TO
TA = 25
°
C
TYP
SN54AC74
MIN
SN74AC74
MIN
UNIT
(OUTPUT)
MIN
MAX
MAX
MAX
fmax
tPLH
tPHL
tPLH
tPHL
140
160
95
125
MHz
PRE or CLR
Q or Q
2.5
6
9
1
9.5
2
10
ns
3
8
9.5
1
10.5
2.5
10.5
CLK
Q or Q
3.5
6
10
1
12
3
10.5
ns
2.5
6
10
1
10
2.5
10.5
operating characteristics, V
CC
= 3.3 V, T
A
= 25
°
C
PARAMETER
TEST CONDITIONS
TYP
UNIT
Cpd
Power dissipation capacitance
CL = 50 pF,
f = 1 MHz
45
pF
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