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SN54LS85 Datasheet(PDF) 4 Page - Motorola, Inc

Part No. SN54LS85
Description  4-BIT MAGNITUDE COMPARATOR
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Maker  MOTOROLA [Motorola, Inc]
Homepage  http://www.freescale.com
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SN54LS85 Datasheet(HTML) 4 Page - Motorola, Inc

   
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5-87
FAST AND LS TTL DATA
SN54/74LS85
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)
Symbol
Parameter
Limits
Unit
Test Conditions
Symbol
Parameter
Min
Typ
Max
Unit
Test Conditions
VIH
Input HIGH Voltage
2.0
V
Guaranteed Input HIGH Voltage for
All Inputs
VIL
Input LOW Voltage
54
0.7
V
Guaranteed Input LOW Voltage for
All Inputs
VIL
Input LOW Voltage
74
0.8
V
Guaranteed Input LOW Voltage for
All Inputs
VIK
Input Clamp Diode Voltage
– 0.65
– 1.5
V
VCC = MIN, IIN = – 18 mA
VOH
Output HIGH Voltage
54
2.5
3.5
V
VCC = MIN, IOH = MAX, VIN = VIH
or VIL per Truth Table
VOH
Output HIGH Voltage
54
2.5
3.5
V
VCC = MIN, IOH = MAX, VIN = VIH
or VIL per Truth Table
VOH
Output HIGH Voltage
74
2.7
3.5
V
VCC = MIN, IOH = MAX, VIN = VIH
or VIL per Truth Table
VOL
Output LOW Voltage
54, 74
0.25
0.4
V
IOL = 4.0 mA
VCC = VCC MIN,
VIN = VIL or VIH
per Truth Table
VOL
Output LOW Voltage
74
0.35
0.5
V
IOL = 8.0 mA
VIN = VIL or VIH
per Truth Table
IIH
Input HIGH Current
A < B, A > B
Other Inputs
20
60
µA
VCC = MAX, VIN = 2.7 V
IIH
A < B, A > B
Other Inputs
0.1
0.3
mA
VCC = MAX, VIN = 7.0 V
IIL
Input LOW Current
A < B, A > B
Other Inputs
– 0.4
– 1.2
mA
VCC = MAX, VIN = 0.4 V
IOS
Output Short Circuit Current (Note 1)
– 20
–100
mA
VCC = MAX
ICC
Power Supply Current
20
mA
VCC = MAX
Note 1: Not more than one output should be shorted at a time, nor for more than 1 second.
AC CHARACTERISTICS (TA = 25°C, VCC = 5.0 V)
Symbol
Parameter
Limits
Unit
Test Conditions
Symbol
Parameter
Min
Typ
Max
Unit
Test Conditions
tPLH
tPHL
Any A or B to A < B, A > B
24
20
36
30
ns
VCC = 5.0 V
CL = 15 pF
tPLH
tPHL
Any A or B to A = B
27
23
45
45
ns
VCC = 5.0 V
CL = 15 pF
tPLH
tPHL
A < B or A = B to A > B
14
11
22
17
ns
VCC = 5.0 V
CL = 15 pF
tPLH
tPHL
A = B to A = B
13
13
20
26
ns
tPLH
tPHL
A > B or A = B to A < B
14
11
22
17
ns
Figure 3
Figure 4
AC WAVEFORMS
VIN
VOUT
1.3 V
tPHL
1.3 V
1.3 V
1.3 V
tPLH
VIN
VOUT
1.3 V
tPHL
1.3 V
1.3 V
1.3 V
tPLH


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