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參數(shù)資料
| 型號： | 74LS640 |
| 廠商： | Motorola, Inc. |
| 英文描述： | OCTAL BUS TRANSCEIVERS |
| 中文描述： | 八進制總線收發(fā)器 |
| 文件頁數(shù)： | 3/3頁 |
| 文件大小： | 83K |
| 代理商： | 74LS640 |
5-3
FAST AND LS TTL DATA
SN54/74LS641
SN54/74LS642
GUARANTEED OPERATING RANGES
Symbol
Parameter
Min
Typ
Max
Unit
VCC
Supply Voltage
54
74
4.5
4.75
5.0
5.0
5.5
5.25
V
TA
Operating Ambient Temperature Range
54
74
–55
0
25
25
125
70
°
C
VOH
IOL
Output Current — High
54, 74
5.5
V
Output Current — Low
54
74
12
24
mA
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE
(unless otherwise specified)
Symbol
b l
Parameter
Limits
U i
Unit
Test Conditions
di i
Min
Typ
Max
VIH
Input HIGH Voltage
2.0
V
Guaranteed Input HIGH Voltage for
All Inputs
VIL
Input LOW Voltage
54
0.5
V
Guaranteed Input LOW Voltage for
All Inputs
74
0.6
VIK
IOH
Input Clamp Diode Voltage
–0.65
–1.5
V
VCC = MIN, IIN = –18 mA
VCC = MIN, VOH = MAX
Output HIGH Current
54, 74
100
μ
A
VOL
Output LOW Voltage
54, 74
0.25
0.4
V
IOL = 12 mA
VCC = VCC MIN,
VIN= VILor VIH
VIN = VIL or VIH
per Truth Table
74
0.35
0.5
V
IOL = 24 mA
IIH
Input HIGH Current
20
μ
A
VCC = MAX, VIN = 2.7 V
VCC = MAX, VIN = 7.0 V
VCC = MAX, VIN = 0.4 V
–0.1
mA
IIL
Input LOW Current
–0.4
mA
ICC
Power Supply Current
Total, Output HIGH
70
mA
VCC = MAX
Total, Output LOW
90
Total at HIGH Z
95
AC CHARACTERISTICS
(TA = 25
°
C, VCC = 5.0 V)
Symbol
b l
b l
Parameter
Limits
U i
Unit
Test Conditions
di i
di i
LS641
LS642
Min
Typ
Max
Min
Typ
Max
tPLH
tPHL
Propagation Delay,
A to B
17
16
25
25
19
14
25
25
ns
CL = 45 pF,
RL = 667
45 F
tPLH
tPHL
Propagation Delay,
B to A
17
16
25
25
19
14
25
25
ns
tPLH
tPHL
Propagation Delay,
G, DIR to A
23
34
40
50
26
43
40
60
ns
p ,
tPLH
tPHL
Propagation Delay,
G, DIR to B
25
37
40
50
28
39
40
60
ns
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 74LS640N | 制造商:Motorola 功能描述:74LS640 MOT'82 NXC2A |
| 74LS641-1N | 制造商:NXP Semiconductors 功能描述: |
| 74LS641N | 制造商:SNT 功能描述: |
| 74LS645 | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:OCTAL BUS TRANSCEIVERS |
| 74LS645-1N | 制造商:Advanced Micro Devices 功能描述: 制造商:Texas Instruments 功能描述: |
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