參數(shù)資料
型號: MC74HC4017N
廠商: MOTOROLA INC
元件分類: 通用總線功能
英文描述: Decade Counter
中文描述: HC/UH SERIES, SYN POSITIVE EDGE TRIGGERED 10-BIT UP RING COUNTER, PDIP16
封裝: PLASTIC, DIP-16
文件頁數(shù): 4/9頁
文件大小: 224K
代理商: MC74HC4017N
MC74HC4017
MOTOROLA
High–Speed CMOS Logic Data
DL129 — Rev 6
4
Symbol
tsu
Parameter
V
25 C
85 C
50
50
10
10
20
14
17
80
14
17
80
1000
Unit
ns
Minimum Setup Time, Clock Enable to Clock
2.0
2.0
4.5
4.5
4.5
6.0
2.0
6.0
2.0
2.0
125 C
75
75
15
15
30
20
120
20
120
1000
Minimum Setup Time, Clock Enable to Clock (Inhibit Count)
(Figure 6)
65
ns
(Figure 6)
65
13
(Figure 7)
13
25
tw
Minimum Pulse Width, Reset Input
100
ns
tw
Minimum Pulse Width, Clock Enable Input
100
ns
Maximum Input Rise and Fall Times
1000
ns
FUNCTION TABLE
Clock
Clock
Enable
Reset
Output State*
L
X
X
X
H
X
L
X
L
L
H
L
L
L
L
no change
no change
reset counter, Q0 = H, Q1–Q9 = L, C0 = H
advance to next state
no change
no change
advance to next state
X
H
X = Don’t care
* Carry Out = H for Q0, Q1, Q2, Q3, or Q4 = H; Carry Out = L otherwise.
PIN DESCRIPTIONS
INPUTS
Clock (Pin 14)
Counter clock input. While Clock Enable is low, a low–to–
high transition on this input advances the counter to its next
state.
Reset (Pin 15)
Asynchronous counter reset input. A high level at this input
initializes the counter and forces Q0 and Carry Out to a high,
Q1–Q9 are forced to a low level.
Clock Enable (Pin 13)
Active–low clock enable input. A low level on this input al-
lows the device to count. A high level on this input inhibits the
counting operation. This input may also be used as a
negative–edge clock input. using Clock (Pin 14) as an
active–high enable pin.
OUTPUTS
Q0–Q9 (Pins 3, 2, 4, 7, 10, 1, 5, 6, 9, 11)
Decoded decade counter outputs. Each of these outputs is
high for one clock period only.
Carry Out (Pin 12)
Cascading output pin. This output is used either as a cas-
cading output or a symmetrical divide–by–ten output. This
output goes low when a count of five is reached and high
when the counter advances to zero or when reset. When the
counters are cascaded this output provides a rising–edge
signal for the clock input of the next counter stage.
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