HCF4521B Datasheet, PDF (8/12 Pages) STMicroelectronics – 24 STAGE FREQUENCY DIVIDER

HCF4521
TYPICAL DATA FOR CRYSTAL OSCILLATOR CIRCUIT
C h ara cteri st i c
Crystal Characteristics
Resonant Frequency
Equivalent Reistance, RS
External Resistor/Capacitor Values
R_O
C_T
C_S
Frequency Stability
Frequency Change as a Function of V_DD (T_A = 25 ^oC)
V_DD Change from 5V to 10V
V_DD Change from 10V to 15V
Frequency Change as a Function of Temperature (V_DD = 10 V)
T_A Change from -55 ^oC to 25 ^oC
HCF4521B only
Complete Oscillator *
T_A Change from 25 ^oC to 125 ^oC
HCF4521B only
Complete Oscillator *
* Complete oscillator includes crystal, capacitors and resistors.
Crystal Oscillator Circuit
500 kHz
CIRCUIT
500
1
47
82
20
6
2
-4
100
-2
-160
50 kHz CIRCUIT Un it
50
kHz
6.2
kΩ
750
kΩ
82
pF
20
pF
2
ppm
2
ppm
-2
ppm
120
ppm
-2
ppm
-560
ppm
* Optional forlow power operation.
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