TL/F/9792
9324/DM9324 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 outputsБ‘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
AkB A Less than B Output (Active HIGH)
AlB A Greater than B Output (Active HIGH)
AeB 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 b55§Ctoa
125§C
Commercial 0§Ctoa
70§C
Storage Temperature Range b65§Ctoa
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
VCC Supply Voltage 4.5 5 5.5 4.75 5 5.25 V
VIH High Level Input Voltage 2 2 V
VIL Low Level Input Voltage 0.8 0.8 V
IOH High Level Output Current b0.8 b0.8 mA
IOL Low Level Output Current 16 16 mA
TAFree Air Operating Temperature b55 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)
VIInput Clamp Voltage VCC eMin, IIeb
12 mA b1.5 V
VOH High Level Output Voltage VCC eMin, IOH eMax 2.4 3.4 V
VIL eMax
VOL Low Level Output Voltage VCC eMin, IOL eMax 0.2 0.4 V
VIH eMin
IIInput Current @Max VCC eMax, VIe5.5V 1mA
Input Voltage
IIH High Level Input Current VCC eMax, VIe2.4V 80 mA
IIL Low Level Input Current VCC eMax, VIe0.4V b3.2 mA
IOS Short Circuit VCC eMax MIL b20 b70 mA
Output Current (Note 2) COM b20 b70
ICC Supply Current VCC eMax 81 mA
Note 1: All typicals are at VCC e5V, TAe25§C.
Note 2: Not more than one output should be shorted at a time.
2
Switching Characteristics
VCC ea
5.0V, TAea
25§C (See Section 1 for waveforms and load configurations)
Symbol Parameter CLe15 pF Units
Min Max
tPLH Propagation Delay 14 ns
tPHL E to A eB14
t
PLH Propagation Delay 25 ns
tPHL An,B
nto A lB22
t
PLH Propagation Delay 26 ns
tPHL An,B
nto A kB21
t
PLH Propagation Delay 30 ns
tPHL An,B
nto A eB32
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 lB output from one device into an A input on
another device and the A kB 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 lB output will be HIGH regardless of all other
inputs except E.
Truth Table
Inputs Outputs
E AnBnAkBA
l
BA
e
B
HX X L L L
L Word A eWord B L L H
L Word A lWord B L H L
L Word B lWord A H L L
HeHIGH Voltage Level
LeLOW Voltage Level
XeImmaterial
Logic Symbol
TL/F/9792–2
VCC ePin 16
GND ePin 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
9324/DM9324 5-Bit Comparator
Physical Dimensions inches (millimeters) (Continued)
16-Lead Ceramic Flat Package (W)
Order Number 9324FMQB
NS Package Number W16A
LIFE SUPPORT POLICY
NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
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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