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74LVC74A Datasheet(PDF) 3 Page - NXP Semiconductors

Part No. 74LVC74A
Description  Dual D-type flip-flop with set and reset; positive-edge trigger
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Manufacturer  PHILIPS [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

74LVC74A Datasheet(HTML) 3 Page - NXP Semiconductors

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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
1RD, 2RD
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
1SD, 2SD
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
VCC
Positive supply voltage
LOGIC SYMBOL
SV00492
410
113
1SD 2SD
1RD 2RD
SD
RD
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
SD
RD
CP
D
Q
Q
L
H
X
X
H
L
H
L
X
X
L
H
L
L
X
X
H
H
INPUTS
OUTPUTS
SD
RD
CP
D
Qn+1
Qn+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
Qn+1 = state after the next LOW-to-HIGH CP transition
FUNCTIONAL DIAGRAM
SV00494
CP FF1
DQ
Q
1D
2
1CP
3
4
SD
1SD
1 1RD
RD
6
1Q
1Q
5
CP FF2
DQ
Q
2D
12
2CP
11
10
SD
2SD
13 2RD
RD
8
2Q
2Q
9


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