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參數(shù)資料
| 型號： | MC74HC257 |
| 廠商： | Motorola, Inc. |
| 英文描述： | 40 AMP MINI-ISO AUTOMOTIVE RELAY |
| 中文描述： | 四2輸入數(shù)據(jù)選擇器/多路與三態(tài)輸出 |
| 文件頁數(shù)： | 2/6頁 |
| 文件大小： | 175K |
| 代理商： | MC74HC257 |
MOTOROLA
High–Speed CMOS Logic Data
DL129 — Rev 6
2
PD
35
±
75
DC Output Current, per Pin
mA
Power Dissipation in Still Air
Plastic DIP
mA
mW
750
(Plastic DIP or SOIC Package)
* Maximum Ratings are those values beyond which damage to the device may occur.
Derating — Plastic DIP: – 10 mW/ C from 65 to 125 C
SOIC Package: – 7 mW/ C from 65 to 125 C
260
RECOMMENDED OPERATING CONDITIONS
Symbol
Parameter
Min
Max
Unit
(Figure 1)
0
500
DC ELECTRICAL CHARACTERISTICS
(Voltages Referenced to GND)
Guaranteed Limit
– 55 to
3.15
VCC
Voltage
|Iout|
20
μ
A
4.5
3.15
3.15
6.0
1.2
1.2
1.2
VOH
Minimum High–Level Output
Vin = VIH or VIL
2.0
6.0
1.9
5.9
1.9
5.9
1.9
5.9
6.0 mA
3.98
3.84
3.70
V
4.5
6.0
0.1
0.1
0.1
Vin = VIH or VIL
6.0 mA
0.26
0.33
0.40
Vin = VIL or VIH
Vout = VCC or GND
|Iout|
4.5
Leakage Current
This device contains protection
circuitry to guard against damage
due to high static voltages or electric
fields. However, precautions must
be taken to avoid applications of any
voltage higher than maximum rated
voltages to this high–impedance cir-
cuit. For proper operation, Vin and
Vout should be constrained to the
range GND (Vin or Vout)
Unused inputs must always be
tied to an appropriate logic voltage
level (e.g., either GND or VCC).
Unused outputs must be left open.
VCC.
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