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參數資料
| 型號： | MC14521BFEL |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類： | 諧振器 |
| 英文描述： | Automotive Catalog Single-Channel High-Speed Mosfet Driver 5-SOT-23 -40 to 125 |
| 中文描述： | 4000/14000/40000 SERIES, PRESCALER, PDSO16 |
| 封裝： | EIAJ, SOIC-16 |
| 文件頁數： | 5/12頁 |
| 文件大小： | 219K |
| 代理商： | MC14521BFEL |
MC14521B
http://onsemi.com
5
Figure 2. Switching Time Test Circuit and Waveforms
PULSE
GENERATOR
Q18
Q19
Q20
Q21
Q22
Q23
Q24
IN 2
R
V
DD
V
DD
′
V
SS
V
SS
′
C
L
C
L
C
L
C
L
C
L
C
L
C
L
V
DD
20 ns
20 ns
20 ns
10%
50%
90%
10%
50%
90%
IN 2
Q
n
t
PLH
t
TLH
t
PHL
t
THL
t
WL
t
WH
Characteristic
500 kHz
Circuit
50 kHz
Circuit
Unit
Crystal Characteristics
Resonant Frequency
Equivalent Resistance, R
S
500
1.0
50
6.2
kHz
k
External Resistor/Capacitor Values
R
o
C
T
C
S
47
82
20
750
82
20
k
pF
pF
Frequency Stability
Frequency Change as a Function
of V
DD
(T
A
= 25 C)
V
DD
Change from 5.0 V to 10 V
V
DD
Change from 10 V to 15 V
Frequency Change as a Function
of Temperature (V
DD
= 10 V)
T
A
Change from – 55 C to + 25 C
MC14521 only
Complete Oscillator*
T
A
Change from +25 C to+125 C
MC14521 only
Complete Oscillator*
+ 6.0
+ 2.0
– 4.0
+ 100
– 2.0
– 160
+ 2.0
+ 2.0
– 2.0
+ 120
– 2.0
– 560
ppm
ppm
ppm
ppm
ppm
ppm
*Complete oscillator includes crystal, capacitors, and resistors.
Figure 4. Typical Data for Crystal Oscillator Circuit
Figure 3. Crystal Oscillator Circuit
V
DD
V
DD
V
DD
′
V
SS
V
SS
′
R*
OUT 1
OUT 2
Q18
Q19
Q20
Q21
Q22
Q23
Q24
IN 1
IN 2
R
R*
C
S
C
T
R
o
18 M
* Optional for low power operation,
10 k
≤
R
≤
70 k
.
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