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74LS161 Folha de dados(PDF) 2 Page - System Logic Semiconductor

Nome de Peças 74LS161
Descrição Electrónicos  Synchronous 4 Bit Counters; Binary, Direct Reset
PDF  5 Pages
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Fabricante Electrônico  SLS [System Logic Semiconductor]
Página de início  http://www.slsemicon.co.kr/e_index.htm
Logo SLS - System Logic Semiconductor

74LS161 Folha de dados(HTML) 2 Page - System Logic Semiconductor

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SL74LS161
System Logic
Semiconductor
SLS
FUNCTION TABLE
Inputs
Outputs
Reset
Load
Enable
P
Enable
T
Clock
Q0
Q1
Q2
Q3
Function
L
X
X
X
X
L
L
L
L
Reset to “0”
H
L
X
X
P0
P1
P2
P3
Preset Data
H
H
X
L
No change
No count
H
H
L
X
No change
No count
H
H
H
H
Count up
Count
H
X
X
X
No change
No count
X=don’t care
P0,P1,P2,P3 = logic level of Data inputs
Ripple Carry Out = Enable T
• Q0 • Q1 • Q2 • Q3
MAXIMUM RATINGS
*
Symbol
Parameter
Value
Unit
VCC
Supply Voltage
7.0
V
VIN
Input Voltage
7.0
V
VOUT
Output Voltage
5.5
V
Tstg
Storage Temperature Range
-65 to +150
°C
*Maximum Ratings are those values beyond which damage to the device may occur.
Functional operation should be restricted to the Recommended Operating Conditions.
RECOMMENDED OPERATING CONDITIONS
Symbol
Parameter
Min
Max
Unit
VCC
Supply Voltage
4.75
5.25
V
VIH
High Level Input Voltage
2.0
V
VIL
Low Level Input Voltage
0.8
V
IOH
High Level Output Current
-0.4
mA
IOL
Low Level Output Current
8.0
mA
fclock
Clock frequency
0
25
MHz
tw(clock)
Width of clock pulse
25
ns
tw(reset)
Width of reset pulse
20
ns
Data inputs P0, P1, P2, P3
20
tsu
Setup time
Enable P or T
20
ns
Load
20
th
Hold time at any input
3
ns
TA
Ambient Temperature Range
0
+70
°C



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