Motorola SN54LS76AJ, SN74LS76AN, SN74LS76AD Datasheet
5-79
FAST AND LS TTL DATA
DUAL JK FLIP-FLOP
WITH SET AND CLEAR
The SN54/74LS76A offers individual J, K, Clock Pulse, Direct Set and Direct Clear inputs. These dual flip-flops are designed so that when the clock
goes HIGH, the inputs are enabled and data will be accepted. The Logic Level
of the J and K inputs will perform according to the Truth T able as long as minimum set-up times are observed. Input data is transferred to the outputs on the
HIGH-to-LOW clock transitions.
MODE SELECT — TRUTH TABLE
INPUTS OUTPUTS
OPERATING MODE
S
D
C
D
J K Q Q
Set
Reset (Clear)
*Undetermined
Toggle
Load “0” (Reset)
Load “1” (Set)
Hold
L
H
L
H
H
H
H
H
L
L
H
H
H
H
X
X
X
h
l
h
l
X
X
X
h
h
l
l
H
L
H
q
L
H
q
L
H
H
q
H
L
q
*Both outputs will be HIGH while both S
D
and CD are LOW, but the output states are unpredictable
if S
D
and CD go HIGH simultaneously.
H,h = HIGH Voltage Level
L,l = LOW Voltage Level
X = Immaterial
l, h (q) = Lower case letters indicate the state of the referenced input (or output) one setup time prior
to the HIGH-to-LOW clock transition
LOGIC DIAGRAM
Q
CLEAR (C
D
)
J
CLOCK (CP)
K
SET (SD)
Q
SN54/74LS76A
DUAL JK FLIP-FLOP
WITH SET AND CLEAR
LOW POWER SCHOTTKY
LOGIC SYMBOL
16
1
4
15
14
K Q
CP
J Q
S
D
VCC = PIN 5
GND = PIN 13
12
6
9
11
10
K Q
CP
J Q
C
D
7
J SUFFIX
CERAMIC
CASE 620-09
N SUFFIX
PLASTIC
CASE 648-08
16
1
16
1
ORDERING INFORMATION
SN54LSXXJ Ceramic
SN74LSXXN Plastic
SN74LSXXD SOIC
16
1
D SUFFIX
SOIC
CASE 751B-03
2
3 8
C
D
S
D
5-80
FAST AND LS TTL DATA
SN54/74LS76A
GUARANTEED OPERATING RANGES
Symbol Parameter Min Typ Max Unit
V
CC
Supply Voltage 54
74
4.5
4.75
5.0
5.0
5.5
5.25
V
T
A
Operating Ambient Temperature Range 54
74
–55
0
25
25
125
70
°C
I
OH
Output Current — High 54, 74 –0.4 mA
I
OL
Output Current — Low 54
74
4.0
8.0
mA
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)
Limits
Symbol
Parameter
Min Typ Max
Unit
Test Conditions
V
IH
Input HIGH Voltage 2.0 V
Guaranteed Input HIGH Voltage for
All Inputs
54 0.7
VILInput LOW Voltage
74 0.8
V
Guaranteed Input LOW Voltage for
All Inputs
V
IK
Input Clamp Diode Voltage –0.65 –1.5 V VCC = MIN, IIN = –18 mA
54 2.5 3.5 V
CC
= MIN, IOH = MAX, VIN = V
IH
VOHOutput HIGH Voltage
74 2.7 3.5 V
VCC = MIN, IOH = MAX, VIN = V
IH
or VIL per Truth Table
54, 74 0.25 0.4 V IOL = 4.0 mA
VOLOutput LOW Voltage
74 0.35 0.5 V IOL = 8.0 mA
VIN = VIL or V
IH
per Truth Table
J, K
Clear
Clock
20
60
80
µA VCC = MAX, VIN = 2.7 V
IIHInput HIGH Current
J, K
Clear
Clock
0.1
0.3
0.4
mA VCC = MAX, VIN = 7.0 V
I
IL
Input LOW Current
J, K
Clear, Clock
–0.4
–0.8
mA VCC = MAX, VIN = 0.4 V
I
OS
Short Circuit Current (Note 1) –20 –100 mA VCC = MAX
I
CC
Power Supply Current 6.0 mA VCC = MAX
Note 1: Not more than one output should be shorted at a time, nor for more than 1 second.
AC CHARACTERISTICS (T
A
= 25°C, VCC = 5.0 V)
Limits
Symbol
Parameter
Min Typ Max
Unit
Test Conditions
f
MAX
Maximum Clock Frequency 30 45 MHz
PLH
15 20 ns
VCC = 5.0 V
C
= 15 pF
t
PLH
t
PHL
Clock, Clear, Set to Output
15 20 ns
CL = 15 pF
AC SETUP REQUIREMENTS (T
A
= 25°C)
Limits
Symbol
Parameter
Min Typ Max
Unit
Test Conditions
t
W
Clock Pulse Width High 20 ns
t
W
Clear Set Pulse Width 25 ns
t
s
Setup Time 20 ns
VCC = 5.0 V
t
h
Hold Time 0 ns
Guaranteed Input LOW Voltage for
V
VCC = VCC MIN,
t
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