SN74LS122 View Datasheet(PDF) - Motorola => Freescale
Part Name
Description
Manufacturer
SN74LS122 Datasheet PDF : 10 Pages
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SN54/74LS122 • SN54/74LS123
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
54
VIL
Input LOW Voltage
74
0.7
Guaranteed Input LOW Voltage for
0.8
V
All Inputs
VIK
Input Clamp Diode Voltage
54
VOH
Output HIGH Voltage
74
– 0.65
– 1.5
2.5
3.5
2.7
3.5
V
VCC = MIN, IIN = – 18 mA
V
VCC = MIN, IOH = MAX, VIN = VIH
V
or VIL per Truth Table
VOL
Output LOW Voltage
54, 74
74
0.25
0.4
0.35
0.5
V
IOL = 4.0 mA VCC = VCC MIN,
VIN = VIL or VIH
V
IOL = 8.0 mA per Truth Table
20
IIH
Input HIGH Current
0.1
IIL
Input LOW Current
IOS
Short Circuit Current (Note 1)
– 20
ICC
Power Supply Current
LS122
LS123
– 0.4
–100
11
20
Note 1: Not more than one output should be shorted at a time, nor for more than 1 second.
µA
VCC = MAX, VIN = 2.7 V
mA
VCC = MAX, VIN = 7.0 V
mA
VCC = MAX, VIN = 0.4 V
mA
VCC = MAX
mA
VCC = MAX
AC CHARACTERISTICS (TA = 25°C, VCC = 5.0 V)
Limits
Symbol
Parameter
Min
Typ
Max
tPLH
tPHL
Propagation Delay, A to Q
Propagation Delay, A to Q
23
33
32
45
tPLH
tPHL
Propagation Delay, B to Q
Propagation Delay, B to Q
23
44
34
56
tPLH
tPHL
Propagation Delay, Clear to Q
Propagation Delay, Clear to Q
28
45
20
27
tW min
tWQ
A or B to Q
A to B to Q
116
200
4.0
4.5
5.0
Unit
Test Conditions
ns
Cext = 0
CL = 15 pF
ns
Rext = 5.0 kΩ
RL = 2.0 kΩ
ns
ns
Cext = 1000 pF, Rext = 10 kΩ,
µs
CL = 15 pF, RL = 2.0 kΩ
AC SETUP REQUIREMENTS (TA = 25°C, VCC = 5.0 V)
Limits
Symbol
Parameter
Min
Typ
Max
Unit
tW
Pulse Width
40
ns
Test Conditions
FAST AND LS TTL DATA
5-200
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