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74LS245 数据表(PDF) 2 Page - ON Semiconductor

部件名 74LS245
功能描述  Octal Bus Transceivers
PDF  4 Pages
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制造商  ONSEMI [ON Semiconductor]
网页  http://www.onsemi.com
标志 ONSEMI - ON Semiconductor

74LS245 数据表(HTML) 2 Page - ON Semiconductor

  74LS245 Datasheet HTML 1Page - ON Semiconductor 74LS245 Datasheet HTML 2Page - ON Semiconductor 74LS245 Datasheet HTML 3Page - ON Semiconductor 74LS245 Datasheet HTML 4Page - ON Semiconductor  
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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
VT+–VT–
Hysteresis
0.2
0.4
V
VCC = MIN
VIK
Input Clamp Diode Voltage
– 0.65
– 1.5
V
VCC = MIN, IIN = – 18 mA
VO
Output HIGH Voltage
2.4
3.4
V
VCC = MIN, IOH = – 3.0 mA
VOH
Output HIGH Voltage
2.0
V
VCC = MIN, IOH = MAX
VO
Output LOW Voltage
0.25
0.4
V
IOL = 12 mA
VCC = VCC MIN,
VIN =VIL or VIH
VOL
Output LOW Voltage
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
– 200
µA
VCC = MAX, VOUT = 0.4 V
I
I
t HIGH C
t
A or B, DR or
E
20
µA
VCC = MAX, VIN = 2.7 V
IIH
Input HIGH Current
DR or E
0.1
mA
VCC = MAX, VIN = 7.0 V
A or B
0.1
mA
VCC = MAX, VIN = 5.5 V
IIL
Input LOW Current
– 0.2
mA
VCC = MAX, VIN = 0.4 V
IOS
Output Short Circuit Current (Note 1)
–40
– 225
mA
VCC = MAX
I
Power Supply Current
Total, Output HIGH
70
A
V
MAX
ICC
Total, Output LOW
90
mA
VCC = MAX
Total at HIGH Z
95
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, TRISE /TFALL ≤ 6.0 ns)
Limits
Symbol
Parameter
Min
Typ
Max
Unit
Test Conditions
tPLH
tPHL
Propagation Delay, Data to Output
8.0
8.0
12
12
ns
CL = 45 pF,
tPZH
Output Enable Time to HIGH Level
25
40
ns
CL = 45 F,
RL = 667 Ω
tPZL
Output Enable Time to LOW Level
27
40
ns
tPLZ
Output Disable Time from LOW Level
15
25
ns
CL = 5.0 pF,
tPHZ
Output Disable Time from HIGH Level
15
25
ns
L
RL = 667 Ω



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