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
Y
Typical power dissipation 16 mW
Count frequency 15 MHz
Connection Diagram
Dual-In-Line Package
Function Tables
COUNT SEQUENCE
(See Note A)
Count
Q
D
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
L
L
L
L
L
L
L
L
H
H
H
H
H
H
H
H
Output
Q
C
L
L
L
L
H
H
H
H
L
L
L
L
H
H
H
H
Q
B
L
L
H
H
L
L
H
H
L
L
H
H
L
L
H
H
Q
A
L
H
L
H
L
H
L
H
L
H
L
H
L
H
L
H
TL F 6637 – 1
Order Number DM54L93J or DM54L93W
See NS Package Number J14A or W14B
RESET COUNT TRUTH TABLE (Note B)
Reset Inputs
R0(1)
H
L
X
R0(2)
H
X
L
Q
D
L
Output
Q
C
Q
B
Q
A
L
L
L
COUNT
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
C
1995 National Semiconductor Corporation
TL F 6637
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
b
55 C to
a
125 C
DM54L
b
65 C to
a
150 C
Storage Temperature Range
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
V
CC
V
IH
V
IL
I
OH
I
OL
f
CLK
t
W
Parameter
Min
Supply Voltage
High Level Input Voltage
Low Level Input Voltage
High Level Output Current
Low Level Output Current
Clock Frequency (Note 5)
Pulse Width (Note 5)
A
B
Reset
t
REL
T
A
Reset Release time (Note 5)
Free Air Operating Temperature
0
90
90
200
200
b
55
DM54L93
Nom
5
Max
55
07
b
0 2
Units
V
V
V
mA
mA
MHz
ns
ns
125
C
45
2
2
6
Electrical Characteristics
over recommended operating free air temperature (unless otherwise noted)
Symbol
V
OH
V
OL
Parameter
High Level Output
Voltage
Low Level Output
Voltage
Input Current
Input Voltage
Max
V
CC
e
Min
V
IL
e
Max
V
CC
e
Min
V
IL
e
Max
(Note 4)
V
CC
e
Max
V
I
e
5 5V
Conditions
I
OH
e
Max
V
IH
e
Min
I
OL
e
Max
V
IH
e
Min
Reset
A
B
I
IH
High Level Input
Current
V
CC
e
Max
V
I
e
2 4V
Reset
A
B
I
IL
Low Level Input
Current
V
CC
e
Max
V
I
e
0 3V
Reset
A
B
I
OS
I
CC
Short Circuit
Output Current
Supply Current
V
CC
e
Max
(Note 2)
V
CC
e
Max (Note 3)
b
3
Min
24
Typ
(Note 1)
34
Max
Units
V
0 15
03
01
02
02
10
20
20
b
0 18
b
0 36
b
0 36
b
15
V
I
I
mA
mA
mA
mA
mA
55
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
f
MAX
t
PLH
t
PHL
Parameter
Maximum Clock Frequency
Propagation Delay Time
Low to High Level Output
Propagation Delay Time
High to Low Level Output
From (Input)
To (Output)
A to Q
A
A to Q
D
A to Q
D
R
L
e
4 kX C
L
e
50 pF
Min
6
400
400
Max
MHz
ns
ns
Units
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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