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參數(shù)資料
| 型號： | HC161 |
| 廠商： | System Logic Semiconductor Co., Ltd. |
| 元件分類： | 通用總線功能 |
| 英文描述： | Presettable Counters |
| 中文描述： | 可預(yù)置計數(shù)器 |
| 文件頁數(shù)： | 1/9頁 |
| 文件大?。?/td> | 85K |
| 代理商： | HC161 |
SL74HC161
S ystem Logic
Semiconductor
SLS
Presettable Counters
High-Performance Silicon-Gate CMOS
The SL74HC161 is identical in pinout to the LS/ALS161. The device
inputs are compatible with standard CMOS outputs; with pullup
resistors, they are compatible with LS/ALSTTL outputs.
The SL74HC161 is programmable 4-bit synchronous counter that
feature parallel Load, asynchronous Reset, a Carry Output for
cascading and count-enable controls.
The SL74HC161 is binary counter with asynchronous Reset.
Outputs Directly Interface to CMOS, NMOS, and TTL
Operating Voltage Range: 2.0 to 6.0 V
Low Input Current: 1.0
μ
A
High Noise Immunity Characteristic of CMOS Devices
ORDERING INFORMATION
SL74HC161N Plastic
SL74HC161D SOIC
T
A
= -55
°
to 125
°
C for all packages
LOGIC DIAGRAM
PIN 16 =V
CC
PIN 8 = GND
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
PIN ASSIGNMENT
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