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June 1989
93L24
5-Bit Comparator
General Description
The 93L24 expandable comparator provides comparison
between two 5-bit words and gives three outputs ‘‘less
than’’ ‘‘greater than’’ and ‘‘equal to’’ A HIGH on the active
LOW Enable Input forces all three outputs LOW
Features
Y Three separate outputs AkB AlB AeB
Y Easily expandable
Y Active low enable input
Connection Diagram
Dual-In-Line Package
Logic Symbol
TL F 10199 – 1
Order Number 93L24DMQB or 93L24FMQB
See NS Package Number J16A or W16A
Pin Names
E
A0 – A4
B0 – B4
AkB
AlB
AeB
Description
Enable Input (Active LOW)
Word A Parallel Inputs
Word B Parallel Inputs
A Less than B Output (Active HIGH)
A Greater than B Output (Active HIGH)
A Equal to B Output (Active HIGH)
VCC e Pin 16
GND e Pin 8
TL F 10199 – 2
Truth Table
Inputs
E An
Bn
HX
X
L Word A e Word B
L Word A l Word B
L Word B k Word A
H e HIGH Voltage Level
L e LOW Voltage Level
X e Immaterial
Outputs
AkB AlB AeB
L LL
LLH
LHL
HL L
C1995 National Semiconductor Corporation TL F 10199
RRD-B30M105 Printed in U S A

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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
MIL b55 C to a125 C
Storage Temperature Range
b65 C to a150 C
Recommended Operating Conditions
Symbol
Parameter
VCC Supply Voltage
VIH High Level Input Voltage
VIL Low Level Input Voltage
IOH High Level Output Current
IOL Low Level Output Current
TA Free Air Operating Temperature
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
Min
45
2
b55
93L24 (MIL)
Nom
5
Max
55
07
b400
48
125
Units
V
V
V
mA
mA
C
Electrical Characteristics over recommended operating free air temperature (unless otherwise noted)
Symbol
Parameter
Conditions
Min
VI
VOH
VOL
II
Input Clamp Voltage
High Level Output Voltage
Low Level Output Voltage
Input Current Max
Input Voltage
VCC e Min II e b10 mA
VCC e Min IOH e Max
VIL e Max VIH e Min
VCC e Min IOL e Max
VIH e Min VIL e Max
VCC e Max VI e 5 5V
24
IIH
High Level Input Current
VCC e Max VI e 2 4V
IIL
Low Level Input Current
VCC e Max VI e 0 3V
IOS Short Circuit
Output Current
VCC e Max (Note 2)
b2 5
ICC Supply Current
VCC e Max
Note 1 All typicals are at VCC e 5V TA e 25 C
Note 2 Not more than one output should be shorted at a time and the duration should not exceed one second
Typ
(Note 1)
Max
b1 5
03
1
40
b0 8
b25
21
Units
V
V
V
mA
mA
mA
mA
mA
2

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Switching Characteristics
VCC e a5 0V TA e a25 C (See Section 1 for test waveforms and output load)
Symbol
Parameter
CL e 15 pF
Min Max
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
Propagation Delay
E to AeB E to AkB AlB
Propagation Delay
An to AlB Bn to AlB
Propagation Delay
An to AkB Bn to AkB
Propagation Delay
An or Bn to AeB
32
35
54
75
70
77
100
102
Units
ns
ns
ns
ns
Functional Description
The 93L24 5-bit comparators use combinational circuitry to
directly generate ‘‘A greater than B’’ and ‘‘A less than B’’
outputs As evident from the logic diagram these ouptuts
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 AlB output from one device into an A input on
another device and the Ak 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 AlB output will be HIGH regardless of all other
inputs except E
Logic Diagram
TL F 10199 – 3
3

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Physical Dimensions inches (millimeters)
16-Lead Ceramic Dual-In-Line Package (J)
Order Number 93L24DMQB
NS Package Number J16A
16-Lead Ceramic Flat Package (W)
Order Number 93L24FMQB
NS Package Number W16A
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