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参数资料
| 型号： | HD74HC4518FPEL |
| 元件分类： | 计数器 |
| 英文描述： | HC/UH SERIES, SYN POSITIVE EDGE TRIGGERED 4-BIT UP DECADE COUNTER, PDSO16 |
| 封装： | 5.50 X 10.06 MM, 1.27 MM PITCH, PLASTIC, SOP-16 |
| 文件页数： | 5/9页 |
| 文件大小： | 116K |
| 代理商： | HD74HC4518FPEL |
HD74HC4518, HD74HC4520
Rev.2.00, Mar 30, 2006 page 5 of 8
Switching Characteristics
(CL = 50 pF, Input tr = tf = 6 ns)
Ta = 25°C
Ta = –40 to +85°C
Item
Symbol VCC (V)
Min
Typ
Max
Min
Max
Unit
Test Conditions
2.0
—
5
—
4
4.5
—
27
—
21
Maximum clock
frequency
fmax
6.0
—
32
—
25
MHz
2.0
—
190
—
240
4.5
—
22
38
—
48
tPLH
tPHL
6.0
—
32
—
41
ns
Clock to Q
2.0
—
200
—
250
4.5
—
22
40
—
50
tPLH
tPHL
6.0
—
34
—
43
ns
Reset to Q
2.0
—
190
—
240
4.5
—
17
38
—
48
Propagation delay time
tPLH
tPHL
6.0
—
32
—
41
ns
Enable to Q
2.0
80
—
100
—
4.5
16
7
—
20
—
Pulse width
tw
6.0
14
—
17
—
ns
2.0
0
—
0
—
4.5
0
–3
—
0
—
Removal time
trem
6.0
0
—
0
—
ns
Reset clock
2.0
—
75
—
95
4.5
—
15
—
19
Output rise/fall time
tTLH
tTHL
6.0
—
13
—
16
ns
Input capacitance
Cin
—
5
10
—
10
pF
Test Circuit
VCC
CL = 50 pF
Clock
VCC
Zout = 50
Q3
Reset
CL = 50 pF
Q0
Zout = 50
Enable
Pulse Generator
Output
Note : 1. CL includes probe and jig capacitance.
See
Function
Table
Input
Output
Input
Pulse Generator
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