SN74LS109A
Dual JK Positive
Edge-Triggered Flip-Flop
The SN74LS109A consists of two high speed completely
independent transition clocked JK flip-flops. The clocking operation
is independent of rise and fall times of the clock waveform. The JK
design allows operation as a D flip-flop by simply connecting the J and
K pins together.
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MODE SELECT – TRUTH TABLE
INPUTS
OPERATING MODE
S
D
Set
Reset (Clear)
*Undetermined
Load “1” (Set)
Hold
Toggle
Load “0” (Reset)
*
L
H
L
H
H
H
H
C
D
H
L
L
H
H
H
H
J
X
X
X
h
l
h
l
K
X
X
X
h
h
l
l
Q
H
L
H
H
q
q
L
Q
L
H
H
L
q
q
H
OUTPUTS
LOW
POWER
SCHOTTKY
16
1
Both outputs will be HIGH while both S
D
and C
D
are LOW, but the output
states are unpredictable if S
D
and C
D
go HIGH simultaneously.
H, h = HIGH Voltage Level
L, I = LOW Voltage Level
X = Don’t Care
l, h (q) = Lower case letters indicate the state of the referenced input
i, h (q) =
(or output) one set-up time prior to the LOW to HIGH clock transition.
16
PLASTIC
N SUFFIX
CASE 648
1
GUARANTEED OPERATING RANGES
Symbol
V
CC
T
A
I
OH
I
OL
Parameter
Supply Voltage
Operating Ambient
Temperature Range
Output Current – High
Output Current – Low
Min
4.75
0
Typ
5.0
25
Max
5.25
70
– 0.4
8.0
Unit
V
°C
mA
mA
SOIC
D SUFFIX
CASE 751B
ORDERING INFORMATION
Device
SN74LS109AN
SN74LS109AD
Package
16 Pin DIP
16 Pin
Shipping
2000 Units/Box
2500/Tape & Reel
©
Semiconductor Components Industries, LLC, 1999
1
December, 1999 – Rev. 6
Publication Order Number:
SN74LS109A/D
SN74LS109A
PACKAGE DIMENSIONS
D SUFFIX
PLASTIC SOIC PACKAGE
CASE 751B–05
ISSUE J
–A–
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: MILLIMETER.
3. DIMENSIONS A AND B DO NOT INCLUDE
MOLD PROTRUSION.
4. MAXIMUM MOLD PROTRUSION 0.15 (0.006)
PER SIDE.
5. DIMENSION D DOES NOT INCLUDE DAMBAR
PROTRUSION. ALLOWABLE DAMBAR
PROTRUSION SHALL BE 0.127 (0.005) TOTAL
IN EXCESS OF THE D DIMENSION AT
MAXIMUM MATERIAL CONDITION.
MILLIMETERS
MIN
MAX
9.80
10.00
3.80
4.00
1.35
1.75
0.35
0.49
0.40
1.25
1.27 BSC
0.19
0.25
0.10
0.25
0
_
7
_
5.80
6.20
0.25
0.50
INCHES
MIN
MAX
0.386
0.393
0.150
0.157
0.054
0.068
0.014
0.019
0.016
0.049
0.050 BSC
0.008
0.009
0.004
0.009
0
_
7
_
0.229
0.244
0.010
0.019
16
9
–B–
1
8
P
8 PL
0.25 (0.010)
M
B
S
G
F
K
C
–T–
SEATING
PLANE
R
X 45
_
M
D
16 PL
M
J
0.25 (0.010)
T B
S
A
S
DIM
A
B
C
D
F
G
J
K
M
P
R
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4
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