參數(shù)資料
型號(hào): 74LVC74APWDH
廠商: NXP SEMICONDUCTORS
元件分類: 通用總線功能
英文描述: Dual D-type flip-flop with set and reset; positive-edge trigger
中文描述: LVC/LCX/Z SERIES, DUAL POSITIVE EDGE TRIGGERED D FLIP-FLOP, COMPLEMENTARY OUTPUT, PDSO14
文件頁數(shù): 3/10頁
文件大?。?/td> 99K
代理商: 74LVC74APWDH
Dual D-type flip-flop with set and reset;
positive-edge trigger
Philips Semiconductors
Product Specification
74LVC74A
1998 Jun 17
3
PIN DESCRIPTION
PIN
NUMBER
SYMBOL
NAME AND FUNCTION
1, 13
1R
D
, 2R
D
Asynchronous reset-direct input
(active LOW)
2, 12
1D, 2D
Data inputs
3, 11
1CP, 2CP
Clock input (LOW-to-HIGH, edge
triggered)
4, 10
1S
D
, 2S
D
Asynchronous set-direct input (active
LOW)
5, 9
1Q, 2Q
True flip-flop outputs
6, 8
1Q, 2Q
Complement flip-flop outputs
7
GND
Ground (0 V)
14
V
CC
Positive supply voltage
LOGIC SYMBOL
SV00492
4 10
1 13
1S
D
2S
D
1R
D
2R
D
S
D
R
D
2
12
3
11
1D
2D
1CP
2CP
1Q
2Q
5
9
1Q
2Q
5
9
D
CP
Q
FF
Q
FUNCTION TABLE
INPUTS
OUTPUTS
S
D
R
D
CP
D
Q
Q
L
H
X
X
H
L
H
L
X
X
L
H
L
L
X
X
H
H
INPUTS
OUTPUTS
S
D
R
D
CP
D
Q
n+1
Q
n+1
H
H
L
L
H
H
H
H
H
L
NOTES:
H = HIGH voltage level
L = LOW voltage level
X = don“t care
= LOW-to-HIGH CP transition
Q
n+1
= state after the next LOW-to-HIGH CP transition
FUNCTIONAL DIAGRAM
SV00494
CP FF1
D
Q
Q
1D
2
1CP
3
4
SD
1SD
1 1RD
RD
6
1Q
1Q
5
CP FF2
D
Q
Q
2D
12
2CP
11
10
SD
2SD
13 2R
D
RD
8
2Q
2Q
9
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