SN74LS640N Просмотр технического описания (PDF) - ON Semiconductor
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SN74LS640N Datasheet PDF : 8 Pages
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SN74LS640, SN74LS641, SN74LS642, SN74LS645
SN74LS640 • SN74LS645
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)
Limits
Symbol
VIH
Parameter
Input HIGH Voltage
Min Typ Max Unit
Test Conditions
2.0
V
Guaranteed Input HIGH Voltage for
All Inputs
VIL
Input LOW Voltage
0.6
V
Guaranteed Input LOW Voltage for
All Inputs
VIK
VOH
VOL
IOZH
IOZL
IIH
IIL
IOS
ICC
Input Clamp Diode Voltage
−0.65 −1.5
V
VCC = MIN, IIN = − 18 mA
Output HIGH Voltage
2.4
3.4
2.0
V
VCC = MIN, IOH = 3.0 mA
V
VCC = MIN, IOH = MAX
Output LOW Voltage
0.25 0.4
0.35 0.5
V
IOL = 12 mA
V
IOL = 24 mA
VCC = VCC MIN,
VIN = VIL or VIH
per Truth Table
Output Off Current HIGH
20
μA VCC = MAX, VOUT = 2.7 V
Output Off Current LOW
− 400 μA VCC = MAX, VOUT = 0.4 V
A or B, DIR or G
20
μA VCC = MAX, VIN = 2.7 V
Input HIGH Current DIR or G
0.1
mA VCC = MAX, VIN = 7.0 V
A or B
0.1
mA VCC = MAX, VIN = 5.5 V
Input LOW Current
− 0.4 mA VCC = MAX, VIN = 0.4 V
Output Short Circuit Current (Note 1)
− 40
− 225 mA VCC = MAX
Power Supply Current
Total Output HIGH
Total, Output LOW
70
90
mA VCC = MAX
Total at HIGH Z
95
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)
Limits
LS640
LS645
Symbol
Parameter
Min Typ Max Min Typ Max Unit
tPLH
Propagation Delay
tPHL
A to B
6.0 10
8.0 15
8.0 15
11 15
ns
tPLH
Propagation Delay
tPHL
B to A
6.0 10
8.0 15
8.0 15
11 15
ns
tPZL
Output Enable Time
tPZH
G, DIR to A
31 40
23 40
31
26
40
40
ns
tPZL
Output Enable Time
tPZH
G, DIR to B
31 40
23 40
31
26
40
40
ns
tPLZ
Output Disable Time
tPHZ
G, DIR to A
15 25
15 25
15
15
25
25
ns
tPLZ
Output Disable Time
tPHZ
G, DIR to B
15 25
15 25
15
15
25
25
ns
Test Conditions
CL = 45 pF,
RL = 667 Ω
CL = 5.0 pF
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