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MC14521BFEL Folha de dados(PDF) 5 Page - ON Semiconductor

Nome de Peças MC14521BFEL
Descrição Electrónicos  24-Stage Frequency Divider
Download  9 Pages
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Fabricante Electrônico  ONSEMI [ON Semiconductor]
Página de início  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

MC14521BFEL Folha de dados(HTML) 5 Page - ON Semiconductor

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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
VDD
VDD
VSS
VSS
CL
CL
CL
CL
CL
CL
CL
VDD
20 ns
20 ns
20 ns
10%
50%
90%
10%
50%
90%
IN 2
Qn
tPLH
tPHL
tTLH
tTHL
tWL
tWH
Characteristic
500 kHz
Circuit
50 kHz
Circuit
Unit
Crystal Characteristics
Resonant Frequency
Equivalent Resistance, RS
500
1.0
50
6.2
kHz
kW
External Resistor/Capacitor Values
Ro
CT
CS
47
82
20
750
82
20
kW
pF
pF
Frequency Stability
Frequency Change as a Function
of VDD (TA = 25_C)
VDD Change from 5.0 V to 10 V
VDD Change from 10 V to 15 V
Frequency Change as a Function
of Temperature (VDD = 10 V)
TA Change from – 55_C to + 25_C
MC14521 only
Complete Oscillator*
TA 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
VDD
VDD
VDD
VSS
VSS
OUT 1
OUT 2
Q18
Q19
Q20
Q21
Q22
Q23
Q24
IN 1
IN 2
R
R*
R*
CS
CT
Ro
18 M
*Optional for low power operation,
10 kW ≤ R ≤ 70 kW.


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