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SN54LS640 Datasheet(PDF) 2 Page - Motorola, Inc

Part # SN54LS640
Description  OCTAL BUS TRANSCEIVERS
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Manufacturer  MOTOROLA [Motorola, Inc]
Direct Link  http://www.freescale.com
Logo MOTOROLA - Motorola, Inc

SN54LS640 Datasheet(HTML) 2 Page - Motorola, Inc

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FAST AND LS TTL DATA
SN54/74LS640
• SN54/74LS645
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
IOH
Output Current — High
54, 74
– 3.0
mA
OH
54
74
–12
–15
mA
IOL
Output Current — Low
54
74
12
24
mA
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
0.5
V
Guaranteed Input LOW Voltage for
VIL
Input LOW Voltage
74
0.6
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, 74
2.4
3.4
V
VCC = MIN, IOH = 3.0 mA
VOH
Output HIGH Voltage
54, 74
2.0
V
VCC = MIN, IOH = MAX
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
– 400
µA
VCC = MAX, VOUT = 0.4 V
IIH
Input HIGH Current
A or B, DIR or G
20
µA
VCC = MAX, VIN = 2.7 V
IIH
Input HIGH Current
DIR or G
0.1
mA
VCC = MAX, VIN = 7.0 V
IH
A or B
0.1
mA
VCC = MAX, VIN = 5.5 V
IIL
Input LOW Current
– 0.4
mA
VCC = MAX, VIN = 0.4 V
IOS
Output Short Circuit Current (Note 1)
– 40
– 225
mA
VCC = MAX
ICC
Power Supply Current
Total Output HIGH
70
mA
VCC = 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)
Symbol
Parameter
Limits
Unit
Test Conditions
Symbol
Parameter
LS640
LS645
Unit
Test Conditions
Symbol
Parameter
Min
Typ
Max
Min
Typ
Max
Unit
Test Conditions
tPLH
tPHL
Propagation Delay
A to B
6.0
8.0
10
15
8.0
11
15
15
ns
CL = 45 pF,
RL = 667 Ω
tPLH
tPHL
Propagation Delay
B to A
6.0
8.0
10
15
8.0
11
15
15
ns
CL = 45 pF,
RL = 667 Ω
tPZL
tPZH
Output Enable Time
G, DIR to A
31
23
40
40
31
26
40
40
ns
CL = 45 pF,
RL = 667 Ω
tPZL
tPZH
Output Enable Time
G, DIR to B
31
23
40
40
31
26
40
40
ns
tPLZ
tPHZ
Output Disable Time
G, DIR to A
15
15
25
25
15
15
25
25
ns
CL = 5.0 pF
tPLZ
tPHZ
Output Disable Time
G, DIR to B
15
15
25
25
15
15
25
25
ns
CL = 5.0 pF


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