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54LS257 Fiches technique(PDF) 4 Page - Motorola, Inc

No de pièce 54LS257
Description  QUAD 2-INPUT MULTIPLEXER WITH 3-STATE OUTPUTS
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Fabricant  MOTOROLA [Motorola, Inc]
Site Internet  http://www.freescale.com
Logo MOTOROLA - Motorola, Inc

54LS257 Fiches technique(HTML) 4 Page - Motorola, Inc

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FAST AND LS TTL DATA
SN54/74LS257B
D SN54/74LS258B
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
2.4
3.4
V
VCC = MIN, IOH = MAX, VIN = VIH
or VIL per Truth Table
VOH
Output HIGH Voltage
74
2.4
3.1
V
VCC = MIN, IOH = MAX, VIN = VIH
or VIL per Truth Table
VOL
Output LOW Voltage
54, 74
0.25
0.4
V
IOL = 12 mA
VCC = VCC MIN,
VIN = VIL or VIH
per Truth Table
VOL
Output LOW Voltage
74
0.35
0.5
V
IOL = 24 mA
VIN = VIL or VIH
per Truth Table
IOZH
Output Off Current — HIGH
20
µA
VCC = MAX, VOUT = 2.7 V
IOZL
Output Off Current — LOW
– 20
µA
VCC = MAX, VOUT = 0.4 V
IIH
Input HIGH Current
Other Inputs
S Inputs
20
40
µA
VCC = MAX, VIN = 2.7 V
IIH
Other Inputs
S Inputs
0.1
0.2
mA
VCC = MAX, VIN = 7.0 V
IIL
Input LOW Current
All Inputs
– 0.4
mA
VCC = MAX, VIN = 0.4 V
IOS
Short Circuit Current (Note 1)
– 30
– 130
mA
VCC = MAX
ICC
Power Supply Current
Total, Output HIGH
LS257B
LS258B
10
9.0
mA
VCC = MAX
ICC
Total, Output LOW
LS257B
LS258B
16
14
mA
VCC = MAX
Total, Output 3-State
LS257B
LS258B
19
16
mA
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) See SN54LS251 for Waveforms
Symbol
Parameter
Limits
Unit
Test Conditions
Symbol
Parameter
Min
Typ
Max
Unit
Test Conditions
tPLH
tPHL
Propagation Delay, Data to Output
10
12
13
15
ns
Figures 1 & 2
CL = 45 pF
tPLH
tPHL
Propagation Delay, Select to Output
14
14
21
21
ns
Figures 1 & 2
CL = 45 pF
tPZH
Output Enable Time to HIGH Level
20
25
ns
Figures 4 & 5
CL = 45 pF
RL = 667 Ω
tPZL
Output Enable Time to LOW Level
20
25
ns
Figures 3 & 5
CL = 45 pF
RL = 667 Ω
tPLZ
Output Disable Time to LOW Level
16
25
ns
Figures 3 & 5
CL = 5.0 pF
RL = 667 Ω
tPHZ
Output Disable Time from HIGH Level
18
25
ns
Figures 4 & 5
CL = 5.0 pF
RL = 667 Ω


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