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參數(shù)資料
| 型號(hào)： | 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(yù)設(shè)功能的D型觸發(fā)器 |
| 文件頁(yè)數(shù)： | 4/17頁(yè) |
| 文件大小： | 531K |
| 代理商： | AC74 |
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SCAS521F AUGUST 1995 REVISED OCTOBER 2003
4
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
VCC
TA = 25
°
C
TYP
4.49
SN54AC74
MIN
2.9
SN74AC74
MIN
2.9
UNIT
MIN
2.9
MAX
MAX
MAX
3 V
IOH = 50
μ
A
4.5 V
4.4
5.49
4.4
4.4
5.5 V
5.4
5.49
5.4
5.4
VOH
IOH = 12 mA
3 V
2.56
2.4
2.46
V
IOH = 24 mA
4.5 V
3.86
3.7
3.76
5.5 V
4.86
4.7
4.76
IOH = 50 mA
IOH = 75 mA
5.5 V
3.85
5.5 V
3.85
3 V
0.002
0.1
0.1
0.1
IOL = 50
μ
A
4.5 V
0.001
0.1
0.1
0.1
5.5 V
0.001
0.1
0.1
0.1
VOL
IOL = 12 mA
3 V
0.36
0.5
0.44
V
IOL = 24 mA
4.5 V
0.36
0.5
0.44
5.5 V
0.36
0.5
0.44
IOL = 50 mA
IOL = 75 mA
5.5 V
1.65
5.5 V
1.65
±
1
±
1
20
II
Data pins
VI = VCC or GND
5.5 V
±
0.1
±
0.1
±
1
±
1
40
Control pins
μ
A
ICC
Ci
Not more than one output should be tested at a time, and the duration of the test should not exceed 2 ms.
VI = VCC or GND,
VI = VCC or GND
IO = 0
5.5 V
2
μ
A
pF
5 V
3
timing requirements over recommended operating free-air temperature range,
V
CC
= 3.3 V
0.3 V (unless otherwise noted) (see Figure 1)
TA = 25
°
C
MIN
SN54AC74
MIN
SN74AC74
MIN
UNIT
MAX
MAX
MAX
fclock
Clock frequency
100
70
95
MHz
tw
Pulse duration
PRE or CLR low
5.5
8
7
ns
CLK
5.5
8
7
tsu
Setup time, data before CLK
↑
Data
4
5
4.5
ns
PRE or CLR inactive
0
0.5
0
th
Hold time, data after CLK
↑
0.5
0.5
0.5
ns
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