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参数资料
| 型号： | IN74LS161N |
| 厂商： | INTEGRAL JOINT STOCK COMPANY |
| 元件分类： | 通用总线功能 |
| 英文描述： | Synchronous 4 Bit Counters; Binary, Direct Reset |
| 中文描述： | 同步4位计数器，二进制，直接复位 |
| 文件页数： | 2/6页 |
| 文件大小： | 341K |
| 代理商： | IN74LS161N |
IN74LS161
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
V
CC
V
IN
V
OUT
Tstg
Supply Voltage
7.0
V
Input Voltage
7.0
V
Output Voltage
5.5
V
°
C
Storage Temperature Range
-65 to +150
*
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
V
CC
V
IH
V
IL
I
OH
I
OL
f
clock
t
w(clock)
t
w(reset)
Supply Voltage
4.75
5.25
V
High Level Input Voltage
2.0
V
Low Level Input Voltage
0.8
V
High Level Output Current
-0.4
mA
Low Level Output Current
8.0
mA
Clock frequency
0
25
MHz
Width of clock pulse
25
ns
Width of reset pulse
20
ns
Data inputs P0, P1, P2, P3
20
t
su
Setup time
Enable P or T
20
ns
Load
20
t
h
T
A
Hold time at any input
3
ns
°
C
Ambient Temperature Range
0
+70
2
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