MC74HC161 데이터 시트보기 (PDF) - ON Semiconductor
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MC74HC161 Datasheet PDF : 16 Pages
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MC74HC161A, MC74HC163A
RESET 1
CLOCK 2
P0 3
P1 4
P2 5
P3 6
ENABLE P 7
GND 8
16 VCC
15 RIPPLE
CARRY OUT
14 Q0
13 Q1
12 Q2
11 Q3
10 ENABLE T
9 LOAD
Figure 1. Pin Assignment
Clock
Reset*
L
H
H
H
H
FUNCTION TABLE
Inputs
Load Enable P Enable T
Output
Q
X
X
L
X
H
H
H
L
H
X
X
Reset
X
Load Preset Data
H
Count
X
No Count
L
No Count
*HC163A only. HC161A is an Asynchronous Reset Device
H = high level, L = low level, X = don’t care
PRESET
DATA
INPUTS
P0 3
P1 4
P2 5
P3 6
CLOCK 2
COUNT
ENABLES
RESET 1
LOAD 9
ENABLE P 7
ENABLE T 10
14 Q0
13 Q1
12 Q2
11 Q3
BCD OR
BINARY
OUTPUT
15 RIPPLE
CARRY
OUT
PIN 16 = VCC
PIN 8 = GND
Figure 2. Logic Diagram
ÎÎÎÎÎÎÎÎÎÎÎ DEVICE/MODE TABLE
ÎÎÎÎÎÎÎÎÎÎÎ Device
Count
Mode
Reset Mode
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ HC161A
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ HC163A
Binary
Binary
Asynchronous
Synchronous
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