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SN74LS251 View Datasheet(PDF) - Motorola => Freescale

Part NameDescriptionManufacturer
SN74LS251 8-INPUT MULTIPLEXER WITH 3-STATE OUTPUTS Motorola
Motorola => Freescale Motorola
SN74LS251 Datasheet PDF : 6 Pages
1 2 3 4 5 6
SN54/74LS251
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)
Limits
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
0.8
V
Guaranteed Input LOW Voltage for
All Inputs
VIK
VOH
VOL
Input Clamp Diode Voltage
Output HIGH Voltage
Output LOW Voltage
– 0.65 – 1.5
2.4
3.1
0.25 0.4
0.35 0.5
V VCC = MIN, IIN = – 18 mA
V
VCC = MIN, IOH = MAX, VIN = VIH
or VIL per Truth Table
V IOL = 12 mA
V IOL = 24 mA
VCC = VCC MIN,
VIN = VIL or VIH
per Truth Table
IOZH
Output Off Current HIGH
20
IOZL
Output Off Current LOW
– 20
20
IIH
Input HIGH Current
0.1
IIL
Input LOW Current
– 0.4
IOS
Short Circuit Current (Note 1)
– 30
– 130
10
ICC
Power Supply Current
12
Note 1: Not more than one output should be shorted at a time, nor for more than 1 second.
µA VCC = MAX, VOUT = 2.7 V
µA VCC = MAX, VOUT = 0.4 V
µA VCC = MAX, VIN = 2.7 V
mA VCC = MAX, VIN = 7.0 V
mA VCC = MAX, VIN = 0.4 V
mA VCC = MAX
mA VCC = MAX, VE = 0 V
mA VCC = MAX, VE = 4.5 V
AC CHARACTERISTICS (TA = 25°C, VCC = 5.0 V)
Limits
Symbol
Parameter
Min Typ Max Unit
tPLH
tPHL
Propagation Delay,
Select to Z Output
20
21
33
33
ns
tPLH
tPHL
Propagation Delay,
Select to Z Output
29
28
45
45
ns
tPLH
tPHL
Propagation Delay,
Data to Z Output
10
9.0
15
15
ns
tPLH
tPHL
Propagation Delay,
Data to Z Output
17
18
28
28
ns
tPZH
tPZL
Output Enable Time
to Z Output
17
24
27
40
ns
tPZH
tPZL
Output Enable Time
to Z Output
30
26
45
40
ns
tPHZ
tPLZ
Output Disable Time
to Z Output
37
15
55
25
ns
tPHZ
tPLZ
Output Disable Time
to Z Output
30
45
15
25
ns
Test Conditions
Figure 1
Figure 2
Figure 1
Figures 2
CL = 15 pF,
RL = 2.0 k
Figures 4, 5
Figures 3, 5
Figures 3, 5
Figures 4, 5
CL = 5.0 pF,
RL = 667 k
FAST AND LS TTL DATA
5-412
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