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參數資料
| 型號： | MC74HCT157A |
| 廠商： | Motorola, Inc. |
| 英文描述： | Quad 2-Input Data Selector/Multiplexer with LSTTL-Compatible Inputs |
| 中文描述： | 四2輸入數據選擇器/復用器的輸入通道兼容輸入 |
| 文件頁數： | 2/5頁 |
| 文件大小： | 127K |
| 代理商： | MC74HCT157A |
MC74HCT157A
MOTOROLA
High–Speed CMOS Logic Data
DL129 — Rev 6
2
Derating — Plastic DIP: – 10 mW/ C from 65 to 125 C
SOIC Package: – 7 mW/ C from 65 to 125 C
For high frequency or heavy load considerations, see Chapter 2 of the Motorola High–Speed CMOS Data Book (DL129/D).
Tstg
Storage Temperature
V
500
– 65 to + 150
C
mW
* Maximum Ratings are those values beyond which damage to the device may occur.
260
Symbol
Parameter
Min
Max
Unit
VCC
DC Supply Voltage (Referenced to GND)
4.5
5.5
V
0
VCC
V
DC ELECTRICAL CHARACTERISTICS
(Voltages Referenced to GND)
b l
Symbol
Parameter
Test Conditions
di i
V
Guaranteed Limit
U i
125 C
ICC
Vin = 2.4 V, Any One Input
lout = 0
V
25 C
0.26
85 C
Unit
Voltage
VIH
|Iout|
20 mA
Minimum High–Level Input
Vout = 0.1 V or VCC – 0.1 V
4.5
0.8
2.0
0.8
0.8
2.0
2.0
V
Voltage
Maximum Low–Level Input
Vout 0.1 V or VCC – 0.1 V
V
|Iout|
20 mA
5.5
0.1
5.4
0.1
5.4
5.4
|Iout|
20
μ
A
Vin = VIH or VIL
5.5
Maximum Low–Level Output
Vin = VIH or VIL
0.1
V
|Iout|
4.0 mA
4.5
4.0
±
0.1
0.33
0.4
Iin
Maximum Input Leakage Current
Vin = VCC or GND
Vin = VCC or GND
5.5
±
1.0
±
1.0
μ
A
Maximum Quiescent Supply
5.5
40
160
μ
A
2.4
mA
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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