DM54LS73A DM74LS73A Dual Negative-Edge-Triggered
Master-Slave J-K Flip-Flops with Clear and Complementary Outputs
June 1989
DM54LS73A DM74LS73A Dual Negative-Edge-Triggered
Master-Slave J-K Flip-Flops with Clear
and Complementary Outputs
General Description
This device contains two independent negative-edge-trig-
gered J-K flip-flops with complementary outputs The J and
K data is processed by the flip-flops on the falling edge of
the clock pulse The clock triggering occurs at a voltage
level and is not directly related to the transition time of the
negative going edge of the clock pulse The data on the J
and K inputs is allowed to change while the clock is high or
low without affecting the outputs as long as setup and hold
times are not violated A low logic level on the clear input
will reset the outputs regardless of the levels of the other
inputs
Connection Diagram
Dual-In-Line Package
TL F 6372 鈥?1
Order Number DM54LS73AJ DM54LS73AW DM74LS73AM or DM74LS73AN
See NS Package Number J14A M14A N14A or W14B
Function Table
Inputs
CLR
L
H
H
H
H
H
CLK
X
J
X
L
H
L
H
X
K
X
L
L
H
H
X
Q
L
Q
0
H
L
Toggle
Q
0
Q
0
Outputs
Q
H
Q
0
L
H
v
v
v
v
H
H
e
High Logic Level
L
e
Low Logic Level
X
e
Either Low or High Logic Level
v
e
Negative going edge of pulse
Q
0
e
The output logic level before the indicated input conditions were es-
tablished
Toggle
e
Each output changes to the complement of its previous level on
each falling edge of the clock pulse
C
1995 National Semiconductor Corporation
TL F 6372
RRD-B30M105 Printed in U S A
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