MC74F112J [MOTOROLA]
DUAL JK NEGATIVE EDGE-TRIGGERED FLIP-FLOP; 双JK负边沿触发触发器
| 型号： | MC74F112J |
| 厂家： | 
MOTOROLA |
| 描述： | DUAL JK NEGATIVE EDGE-TRIGGERED FLIP-FLOP |
| 文件： | 总3页 (文件大小：71K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MC74F112
DUAL JK NEGATIVE
EDGE-TRIGGERED FLIP-FLOP
The MC74F112 contains two independent, high-speed JK flip-flops with Di-
rect Set and Clear inputs. Synchronous state changes are initiated by the fal-
ling edge of the clock. Triggering occurs at a voltage level of the clock and is
not directly related to the transition time. The J and K inputs can change when
the clock is in either state without affecting the flip-flop, provided that they are
in the desired state during the recommended setup and hold times relative to
DUAL JK NEGATIVE
EDGE-TRIGGERED FLIP-FLOP
FAST SCHOTTKY TTL
thefalling edge of the clock. A LOW signal on S or C prevents clocking and
D
D
forces Q or Q HIGH, respectively. Simultaneous LOW signals on S and C
D
D
force both Q and Q HIGH.
CONNECTION DIAGRAM
J SUFFIX
CERAMIC
CASE 620-09
V
C
C
CP
K
J
S
Q
2
CC
D1
D2
2
2
2
D2
16
15
14
13
11
10
9
12
16
1
C
S
D
D
K
Q
Q
J
Q
Q
CP
J
CP
K
N SUFFIX
S
C
D
D
PLASTIC
CASE 648-08
16
5
1
CP
2
3
4
6
7
8
1
GND
K
J
S
Q
Q
Q
2
1
1
1
D1
1
1
D SUFFIX
SOIC
CASE 751B-03
FUNCTION TABLE (Each Half)
Inputs
16
Output
1
@ t
@ t + 1
n
n
J
K
Q
ORDERING INFORMATION
L
L
L
H
L
Q
n
MC74FXXXJ
Ceramic
L
MC74FXXXN Plastic
MC74FXXXD SOIC
H
H
H
H
Q
n
Asynchronous Inputs:
LOW Input to S sets Q to HIGH level
D
LOGIC SYMBOL
LOW Input to C sets Q to LOW level
D
Clear and Set are independent of clock
Simultaneous LOW on C and S makes both Q and Q HIGH
4
10
D
D
S
H = HIGH Voltage Level
L = LOW Voltage Level
S
D
D
J
J
3
1
2
Q
Q
5
Q
Q
11
13
9
t
t
= Bit time before clock pulse
+ 1 = Bit time after clock pulse
n
n
CP
CP
K
6
K
12
7
C
D
15
14
V
= PIN 16
CC
GND = PIN 8
FAST AND LS TTL DATA
4-45
MC74F112
LOGIC DIAGRAM (one half shown)
Q
Q
C
S
D
K
D
J
CP
GUARANTEED OPERATING RANGES
Symbol
Parameter
Min
Typ
5.0
25
Max
Unit
V
V
CC
Supply Voltage
74
74
74
74
4.5
0
5.5
70
T
A
Operating Ambient Temperature Range
Output Current — High
°C
I
I
–1.0
20
mA
mA
OH
Output Current — Low
OL
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)
Limits
Symbol
Parameter
Input HIGH Voltage
Min
Typ
Max
Unit
V
Test Conditions
Guaranteed Input HIGH Voltage
Guaranteed Input LOW Voltage
V
IH
2.0
V
V
Input LOW Voltage
0.8
V
IL
Input Clamp Diode Voltage
–1.2
V
I
I
I
I
= –18 mA
V
CC
V
CC
V
CC
V
CC
= MIN
IK
IN
74
74
2.5
2.7
3.4
3.4
V
= –1.0 mA
= –1.0 mA
= 20 mA
= 4.50 V
= 4.75 V
= MIN
OH
OH
OL
V
V
Output HIGH Voltage
Output LOW Voltage
Input HIGH Current
V
OH
0.35
0.5
20
V
OL
I
IH
µA
µA
V
= MAX, V = 2.7 V
IN
CC
CC
100
V
= MAX, V = 7.0 V
IN
Input LOW Current
(J and K Inputs)
–0.6
–2.4
–3.0
–150
19
mA
mA
mA
mA
mA
I
IL
(CP Inputs)
V
CC
= MAX, V = 0.5 V
IN
(C and S Inputs)
D
D
I
I
Output Short Circuit Current (Note 2)
Power Supply Current
–60
V
V
= MAX, V
= MAX, V
= 0 V
OS
CC
OUT
12
= 0 V
CC
CC
CP
NOTES:
1. For conditions shown as MIN or MAX, use the appropriate value specified under guaranteed operating ranges.
2. Not more than one output should be shorted at a time, nor for more than 1 second.
FAST AND LS TTL DATA
4-46
MC74F112
AC CHARACTERISTICS
74F
74F
T
A
= +25°C
T
A
= 0°C to +70°C
V
CC
= +5.0 V
V
CC
= 5.0 V ± 10%
C
= 50
F
P
C = 50 F
L P
L
Symbol
Parameter
Maximum Clock Frequency
Propagation Delay
CP to Q or Q
Min
Max
Min
Max
Unit
f
110
2.0
2.0
2.0
2.0
MHz
max
PLH
PHL
PLH
PHL
t
t
t
t
6.5
6.5
6.5
6.5
2.0
2.0
2.0
2.0
7.5
7.5
7.5
7.5
ns
ns
n
n
n
Propagation Delay
or S to Q or Q
n
C
Dn
Dn
n
AC OPERATING REQUIREMENTS
74F
= +25°C
74F
T = 0°C to +70°C
A
T
A
V
CC
= +5.0 V
V
CC
= 5.0 V ± 10%
Symbol
Parameter
Setup Time, HIGH or LOW
J or K to CP
n
Min
4.0
3.0
0
Typ
Max
Min
Max
Unit
t
(H)
(L)
(H)
(L)
(H)
(L)
(L)
4.0
3.0
0
s
t
s
n
n
ns
t
h
Hold Time, HIGH or LOW
or K to CP
t
J
0
0
h
n
n
n
t
w
CP Pulse Width, HIGH
n
4.5
4.5
4.5
4.5
4.5
4.5
ns
t
w
or LOW
t
w
C
or S
Dn
Pulse Width, LOW
ns
ns
Dn
Recovery Time
or S to CP
t
4.0
5.0
rec
C
Dn
Dn
FAST AND LS TTL DATA
4-47
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