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SN74LS109A Datasheet(PDF) 1 Page - ON Semiconductor

Part No. SN74LS109A
Description  LOW POWER SCHOTTKY
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Maker  ONSEMI [ON Semiconductor]
Homepage  http://www.onsemi.com
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© Semiconductor Components Industries, LLC, 1999
December, 1999 – Rev. 6
1
Publication Order Number:
SN74LS109A/D
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.
MODE SELECT – TRUTH TABLE
OPERATING MODE
INPUTS
OUTPUTS
OPERATING MODE
SD
CD
J
K
Q
Q
Set
Reset (Clear)
*Undetermined
Load “1” (Set)
Hold
Toggle
Load “0” (Reset)
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
H
q
q
L
L
H
H
L
q
q
H
*
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, 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.
GUARANTEED OPERATING RANGES
Symbol
Parameter
Min
Typ
Max
Unit
VCC
Supply Voltage
4.75
5.0
5.25
V
TA
Operating Ambient
Temperature Range
0
25
70
°C
IOH
Output Current – High
– 0.4
mA
IOL
Output Current – Low
8.0
mA
LOW
POWER
SCHOTTKY
Device
Package
Shipping
ORDERING INFORMATION
SN74LS109AN
16 Pin DIP
2000 Units/Box
SN74LS109AD
16 Pin
SOIC
D SUFFIX
CASE 751B
http://onsemi.com
2500/Tape & Reel
PLASTIC
N SUFFIX
CASE 648
16
1
16
1




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