TL F 9792
9324DM9324
5-Bit
Comparator
June 1989
9324 DM9324 5-Bit Comparator
General Description
The 9324 expandable comparators provide comparison be-
tween two 5-bit words and give three outputs
``less than''
``greater than'' and ``equal to'' A HIGH on the active LOW
Enable Input forces all three outputs LOW
Connection Diagram
Dual-In-Line Package
TL F 9792 1
Order Number 9324DMQB 9324FMQB or DM9324N
See NS Package Number J16A N16E or W16A
Pin Names
Description
E
Enable Input (Active LOW)
A0 A4
Word A Parallel Inputs
B0 B4
Word B Parallel Inputs
A
k
B
A Less than B Output (Active HIGH)
A
l
B
A Greater than B Output (Active HIGH)
A
e
B
A Equal to B Output (Active HIGH)
C1995 National Semiconductor Corporation
RRD-B30M115 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
7V
Input Voltage
5 5V
Operating Free Air Temperature Range
Military
b
55 C to
a
125 C
Commercial
0 C to
a
70 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
Military
Commercial
Units
Min
Nom
Max
Min
Nom
Max
V
CC
Supply Voltage
4 5
5
5 5
4 75
5
5 25
V
V
IH
High Level Input Voltage
2
2
V
V
IL
Low Level Input Voltage
0 8
0 8
V
I
OH
High Level Output Current
b
0 8
b
0 8
mA
I
OL
Low Level Output Current
16
16
mA
T
A
Free Air Operating Temperature
b
55
125
0
70
C
Electrical Characteristics
Over recommended operating free air temperature range (unless otherwise noted)
Symbol
Parameter
Conditions
Min
Typ
Max
Units
(Note 1)
V
I
Input Clamp Voltage
V
CC
e
Min I
I
e b
12 mA
b
1 5
V
V
OH
High Level Output Voltage
V
CC
e
Min I
OH
e
Max
2 4
3 4
V
V
IL
e
Max
V
OL
Low Level Output Voltage
V
CC
e
Min I
OL
e
Max
0 2
0 4
V
V
IH
e
Min
I
I
Input Current
Max
V
CC
e
Max V
I
e
5 5V
1
mA
Input Voltage
I
IH
High Level Input Current
V
CC
e
Max V
I
e
2 4V
80
m
A
I
IL
Low Level Input Current
V
CC
e
Max V
I
e
0 4V
b
3 2
mA
I
OS
Short Circuit
V
CC
e
Max
MIL
b
20
b
70
mA
Output Current
(Note 2)
COM
b
20
b
70
I
CC
Supply Current
V
CC
e
Max
81
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
2
Switching Characteristics
V
CC
e a
5 0V T
A
e a
25 C (See Section 1 for waveforms and load configurations)
Symbol
Parameter
C
L
e
15 pF
Units
Min
Max
t
PLH
Propagation Delay
14
ns
t
PHL
E to A
e
B
14
t
PLH
Propagation Delay
25
ns
t
PHL
A
n
B
n
to A
l
B
22
t
PLH
Propagation Delay
26
ns
t
PHL
A
n
B
n
to A
k
B
21
t
PLH
Propagation Delay
30
ns
t
PHL
A
n
B
n
to A
e
B
32
Functional Description
The '24 5-bit comparators use combinational circuitry to di-
rectly generate ``A greater than B'' and ``A less than B''
outputs As evident from the logic diagram these outputs
are generated in only three gate delays The ``A equals B''
output is generated in one additional gate delay by decoding
the ``A neither less than nor greater than B'' condition with a
NOR gate All three outputs are activated by the active LOW
Enable Input (E)
Tying the A
l
B output from one device into an A input on
another device and the A
k
B output into the corresponding
B input permits easy expansion
The A4 and B4 inputs are the most significant inputs and
A0 B0 the least significant Thus if A4 is HIGH and B4 is
LOW the A
l
B output will be HIGH regardless of all other
inputs except E
Truth Table
Inputs
Outputs
E
A
n
B
n
A
k
B
A
l
B
A
e
B
H
X
X
L
L
L
L
Word A
e
Word B
L
L
H
L
Word A
l
Word B
L
H
L
L
Word B
l
Word A
H
L
L
H
e
HIGH Voltage Level
L
e
LOW Voltage Level
X
e
Immaterial
Logic Symbol
TL F 9792 2
V
CC
e
Pin 16
GND
e
Pin 6
3
Logic Diagram
TL F 9792 3
4
Physical Dimensions
inches (millimeters)
16-Lead Ceramic Dual-In-Line Package (J)
Order Number 9324DMQB
NS Package Number J16A
16-Lead Molded Dual-In-Line Package (N)
Order Number DM9324N
NS Package Number N16E
5
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