SN54/74LS76A 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 Table as long as minimum set-up times are observed. Input data is transferred to the outputs on the HIGH-to-LOW clock transitions.
DUAL JK FLIP-FLOP WITH SET AND CLEAR LOW POWER SCHOTTKY
J SUFFIX CERAMIC CASE 620-09
MODE SELECT — TRUTH TABLE INPUTS
OUTPUTS
16
OPERATING MODE Set Reset (Clear) *Undetermined Toggle Load “0” (Reset) Load “1” (Set) Hold
SD
CD
J
K
Q
Q
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
1
N SUFFIX PLASTIC CASE 648-08
16 1
*Both outputs will be HIGH while both SD and CD are LOW, but the output states are unpredictable if SD 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
D SUFFIX SOIC CASE 751B-03
16 1
ORDERING INFORMATION SN54LSXXJ SN74LSXXN SN74LSXXD
Ceramic Plastic SOIC
LOGIC DIAGRAM LOGIC SYMBOL Q
CLEAR (CD)
K
SD Q
16
K
1
CP
4
J C Q D
SET (SD)
J
7
2
Q
15
14
SD Q
11
6
CP
9
J C Q D
10
12
K
3
8 VCC = PIN 5 GND = PIN 13
CLOCK (CP)
FAST AND LS TTL DATA 5-1
SN54/74LS76A GUARANTEED OPERATING RANGES Symbol
Parameter
Min
Typ
Max
Unit
VCC
Supply Voltage
54 74
4.5 4.75
5.0 5.0
5.5 5.25
V
TA
Operating Ambient Temperature Range
54 74
– 55 0
25 25
125 70
°C
IOH
Output Current — High
54, 74
– 0.4
mA
IOL
Output Current — Low
54 74
4.0 8.0
mA
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified) Limits S b l Symbol VIH
Input HIGH Voltage
VIL
Input LOW Voltage
VIK
Input Clamp Diode Voltage
VOH
Output HIGH Voltage
VOL
Output LOW Voltage
IIH
Min
P Parameter
Typ
Max
2.0 54
0.7
74
0.8 – 0.65
– 1.5
U i Unit
T Test C Conditions di i
V
Guaranteed Input HIGH Voltage for All Inputs
V
Guaranteed Input p LOW Voltage g for All Inputs
V
VCC = MIN, IIN = – 18 mA
54
2.5
3.5
V
74
2.7
3.5
V
VCC = MIN,, IOH = MAX,, VIN = VIH or VIL per Truth Table VCC = VCC MIN, VIN = VIL or VIH per Truth Table
54, 74
0.25
0.4
V
IOL = 4.0 mA
74
0.35
0.5
V
IOL = 8.0 mA
J, K Clear Clock
20 60 80
µA
VCC = MAX, VIN = 2.7 V
J, K Clear Clock
0.1 0.3 0.4
mA
VCC = MAX, VIN = 7.0 V
– 0.4 – 0.8
mA
VCC = MAX, VIN = 0.4 V
–100
mA
VCC = MAX
6.0
mA
VCC = MAX
Input HIGH Current
IIL
Input LOW Current
IOS
Short Circuit Current (Note 1)
ICC
Power Supply Current
J, K Clear, Clock – 20
Note 1: Not more than one output should be shorted at a time, nor for more than 1 second.
AC CHARACTERISTICS (TA = 25°C, VCC = 5.0 V) Limits S b l Symbol
P Parameter
fMAX
Maximum Clock Frequency
tPLH tPHL
Clock Clear Clock, Clear, Set to Output
Min
Typ
30
45
Max
U i Unit
T Test C Conditions di i
MHz
15
20
ns
15
20
ns
Max
U i Unit
VCC = 5.0 50V CL = 15 pF
AC SETUP REQUIREMENTS (TA = 25°C) Limits S b l Symbol
P Parameter
Min
Typ
tW
Clock Pulse Width High
20
ns
tW
Clear Set Pulse Width
25
ns
ts
Setup Time
20
ns
th
Hold Time
0
ns
FAST AND LS TTL DATA 5-2
T Test C Conditions di i
VCC = 5 5.0 0V