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參數資料
| 型號： | HD74HC490 |
| 廠商： | Hitachi,Ltd. |
| 元件分類： | 通用總線功能 |
| 英文描述： | Dual 4-bit Decade Counters |
| 中文描述： | 雙4位十年計數器 |
| 文件頁數： | 3/8頁 |
| 文件大小： | 44K |
| 代理商： | HD74HC490 |
HD74HC490
3
DC Characteristics
Ta = 25
°
C
Ta = –40 to
+85
°
C
Item
Symbol
V
CC
(V)
2.0
Min Typ Max Min
Max
Unit
Test Conditions
Input voltage
V
IH
1.5
—
—
1.5
—
V
4.5
3.15 —
—
3.15
—
6.0
4.2
—
—
4.2
—
V
IL
2.0
—
—
0.5
—
0.5
V
4.5
—
—
1.35 —
1.35
6.0
—
—
1.8
—
1.8
Output voltage
V
OH
2.0
1.9
2.0
—
1.9
—
V
Vin = V
IH
or V
IL
I
OH
= –20
μ
A
4.5
4.4
4.5
—
4.4
—
6.0
5.9
6.0
—
5.9
—
4.5
4.18 —
—
4.13
—
I
OH
= –4 mA
I
OH
= –5.2 mA
6.0
5.68 —
—
5.63
—
V
OL
2.0
—
0.0
0.1
—
0.1
V
Vin = V
IH
or V
IL
I
OL
= 20
μ
A
4.5
—
0.0
0.1
—
0.1
6.0
—
0.0
0.1
—
0.1
4.5
—
—
0.26 —
0.33
I
OL
= 4 mA
I
OL
= 5.2 mA
6.0
—
—
0.26 —
0.33
Input current
Iin
6.0
—
—
±
0.1 —
±
1.0
μ
A
μ
A
Vin = V
CC
or GND
Vin = V
CC
or GND, Iout = 0
μ
A
Quiescent supply
current
I
CC
6.0
—
—
4.0
—
40
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