TL F 6637
DM54L93
Decade
Divide-by-12
and
Binary
Counters
June 1989
DM54L93
Decade Divide-by-12 and Binary Counters
General Description
Each of these monolithic counters contains four master-
slave flip-flops and additional gating to provide a divide-by-
two counter and a three-stage binary counter for which the
count cycle length is divide-by-eight
To use their maximum count length (decade divide-by-
twelve or four-bit binary) the B input is connected to the Q
A
output The input count pulses are applied to input A and the
outputs are as described in the appropriate truth table
Features
Y
Typical power dissipation 16 mW
Y
Count frequency 15 MHz
Connection Diagram
Dual-In-Line Package
TL F 6637 1
Order Number DM54L93J or DM54L93W
See NS Package Number J14A or W14B
Function Tables
COUNT SEQUENCE
(See Note A)
Count
Output
Q
D
Q
C
Q
B
Q
A
0
L
L
L
L
1
L
L
L
H
2
L
L
H
L
3
L
L
H
H
4
L
H
L
L
5
L
H
L
H
6
L
H
H
L
7
L
H
H
H
8
H
L
L
L
9
H
L
L
H
10
H
L
H
L
11
H
L
H
H
12
H
H
L
L
13
H
H
L
H
14
H
H
H
L
15
H
H
H
H
RESET COUNT TRUTH TABLE (Note B)
Reset Inputs
Output
R0(1)
R0(2)
Q
D
Q
C
Q
B
Q
A
H
H
L
L
L
L
L
X
COUNT
X
L
COUNT
Note A
Output Q
A
is connected to input B
Note B
H
e
High Level L
e
Low Level X
e
Don't Care
C1995 National Semiconductor Corporation
RRD-B30M105 Printed in U S A
Absolute Maximum Ratings
(Note)
If Military Aerospace specified devices are required
please contact the National Semiconductor Sales
Office Distributors for availability and specifications
Supply Voltage
8V
Input Voltage
5 5V
Operating Free Air Temperature Range
DM54L
b
55 C to
a
125 C
Storage Temperature Range
b
65 C to
a
150 C
Note
The ``Absolute Maximum Ratings'' are those values
beyond which the safety of the device cannot be guaran-
teed The device should not be operated at these limits The
parametric values defined in the ``Electrical Characteristics''
table are not guaranteed at the absolute maximum ratings
The ``Recommended Operating Conditions'' table will define
the conditions for actual device operation
Recommended Operating Conditions
Symbol
Parameter
DM54L93
Units
Min
Nom
Max
V
CC
Supply Voltage
4 5
5
5 5
V
V
IH
High Level Input Voltage
2
V
V
IL
Low Level Input Voltage
0 7
V
I
OH
High Level Output Current
b
0 2
mA
I
OL
Low Level Output Current
2
mA
f
CLK
Clock Frequency (Note 5)
0
6
MHz
t
W
Pulse Width (Note 5)
A
90
B
90
ns
Reset
200
t
REL
Reset Release time (Note 5)
200
ns
T
A
Free Air Operating Temperature
b
55
125
C
Electrical Characteristics
over recommended operating free air temperature (unless otherwise noted)
Symbol
Parameter
Conditions
Min
Typ
Max
Units
(Note 1)
V
OH
High Level Output
V
CC
e
Min I
OH
e
Max
2 4
3 4
V
Voltage
V
IL
e
Max V
IH
e
Min
V
OL
Low Level Output
V
CC
e
Min I
OL
e
Max
Voltage
V
IL
e
Max V
IH
e
Min
0 15
0 3
V
(Note 4)
I
I
Input Current
Max
V
CC
e
Max
Reset
0 1
Input Voltage
V
I
e
5 5V
A
0 2
mA
B
0 2
I
IH
High Level Input
V
CC
e
Max
Reset
10
Current
V
I
e
2 4V
A
20
m
A
B
20
I
IL
Low Level Input
V
CC
e
Max
Reset
b
0 18
Current
V
I
e
0 3V
A
b
0 36
mA
B
b
0 36
I
OS
Short Circuit
V
CC
e
Max
b
3
b
15
mA
Output Current
(Note 2)
I
CC
Supply Current
V
CC
e
Max (Note 3)
5 5
mA
Note 1
All typicals are at V
CC
e
5V T
A
e
25 C
Note 2
Not more than one output should be shorted at a time
Note 3
I
CC
is measured with all outputs open R0 inputs grounded following momentary connection to 4 5V and all other inputs grounded
Note 4
Q
A
outputs are tested at I
OL
e
max plus the limit value of I
IL
for the B input This permits driving the B input while maintaining full fan-out capability
Note 5
T
A
e
25 C and V
CC
e
5V
2
Switching Characteristics
at V
CC
e
5V and T
A
e
25 C (See Section 1 for Test Waveforms and Output Load)
Symbol
Parameter
From (Input)
R
L
e
4 kX C
L
e
50 pF
Units
To (Output)
Min
Max
f
MAX
Maximum Clock Frequency
A to Q
A
6
MHz
t
PLH
Propagation Delay Time
A to Q
D
400
ns
Low to High Level Output
t
PHL
Propagation Delay Time
A to Q
D
400
ns
High to Low Level Output
Logic Diagram
TL F 6637 2
The J and K inputs shown without connection are for reference only and are functionally at a high level
3
DM54L93
Decade
Divide-by-12
and
Binary
Counters
Physical Dimensions
inches (millimeters)
14-Lead Ceramic Dual-In-Line Package (J)
Order Number DM54L93J
NS Package Number J14A
14-Lead Ceramic Flat Package (W)
Order Number DM54L93W
NS Package Number W14B
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DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL
SEMICONDUCTOR CORPORATION As used herein
1 Life support devices or systems are devices or
2 A critical component is any component of a life
systems which (a) are intended for surgical implant
support device or system whose failure to perform can
into the body or (b) support or sustain life and whose
be reasonably expected to cause the failure of the life
failure to perform when properly used in accordance
support device or system or to affect its safety or
with instructions for use provided in the labeling can
effectiveness
be reasonably expected to result in a significant injury
to the user
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