參數(shù)資料
型號: 74HC4538A
廠商: Motorola, Inc.
元件分類: 參考電壓二極管
英文描述: Low Current Operation at 250 ,Low Reverse Leakage,Low Noise Zener Diode
中文描述: 250 的低電流運(yùn)算,低反向泄露,低噪聲穩(wěn)壓二極管
文件頁數(shù): 2/13頁
文件大?。?/td> 368K
代理商: 74HC4538A
MOTOROLA
High–Speed CMOS Logic Data
DL129 — Rev 6
3–2
500
Tstg
TL
Storage Temperature
Lead Temperature, 1 mm from Case for 10 Seconds
SOIC Package
– 65 to + 150
C
C
Functional operation should be restricted to the Recommended Operating Conditions.
Derating — Plastic DIP: – 10 mW/ C from 65 to 125 C
Ceramic DIP: – 10 mW/ C from 100 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).
RECOMMENDED OPERATING CONDITIONS
Symbol
VCC
Vin, Vout
TA
tr, tf
Parameter
DC Supply Voltage (Referenced to GND)
DC Input Voltage, Output Voltage (Referenced to GND)
Min
3.0**
0
Max
6.0
VCC
+ 125
Unit
Operating Temperature, All Package Types
– 55
V
Input Rise and Fall Time
0
1000
ns
V
C
VCC = 2.0 V
2.0
Cx
*The maximum allowable values of Rx and Cx are a function of the leakage of capacitor Cx, the leakage of the HC4538A, and leakage due to
F
may cause a problem during power down (see Power Down Considerations). Susceptibility to externally induced noise signals may occur for
Rx > 1.0 M
.
**The HC4538A will function at 2.0 V but for optimum pulse width stability, VCC should be above 3.0 V.
NOTE:Information on typical parametric values can be found in Chapter 2 of the Motorola High–Speed CMOS Data Book (DL129/D).
External Timing Capacitor
VCC
4.5 V
0
*
μ
F
*
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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