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STR720 Datasheet(PDF) 384 Page - STMicroelectronics

No. de pieza STR720
Descripción Electrónicos  ARM720T 16/32-BIT MCU WITH 16K RAM, USB, CAN, 3 TIMERS, ADC, 6 COMMUNICATIONS INTERFACES
PDF  401 Pages
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STR720 Datasheet(HTML) 384 Page - STMicroelectronics

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STR720 - ELECTRICAL CHARACTERISTICS
384/401
The electrical characteristics of STR720 oscillator are reported in Table 98.
1.
VDD(all) = 1.80 V ± 10%, VDD3(all) = 3.30 V ± 10%, TA = -40 / +85 °C unless otherwise specified.
2.
Data based on design characterization done with AEL Crystal (N. 4065), not tested in production
Table 97. Crystal oscillator recommanded characteristics
Symbol
Parameter
Conditions
Value
Unit
Min
Typ
Max
fOSCIN
Crystal Frequency
-
32.678
-
kHz
fTOL
Crystal frequency tolerance
-30
-
+30
ppm
RD
Serial drain resistor
-
220
-
k
Ω
CG, CD
Recommended load capaci-
tors versus crystal load capac-
itance
RD = 220 kΩ
CL =9 pF
Including board-stray capaci-
tances
-15
-
pF
RD = 220 kΩ
CL = 12.5 pF
Including board-stray capaci-
tances
-22
-
pF
Table 98. Oscillator electrical characteristics
Symbol
Parameter
Test Conditions(1)
Value
Unit
Min
Typ
Max
VDDRTC
Supply Voltage for PLL
1.71
1.80
1.89
V
gm
Oscillator Transconductance
14
30
44
µA/V
tSETUP
Oscillator Start-up Time (2)
Stable VDD
400
500
1000
ms
Vq
Operating point voltage
-
956
-mV
VOSC
Output voltage amplitude(2)
CL = 12 pF, RD = 220 kΩ
-
788
-
mV(rms)
ROSC
Oscillation allowance(2)
CL = 12 pF, RD = 220 kΩ
500
-
-
k
Ω
fOFFSET
Static frequency deviation (
∆F/
F)(2)
CL = 12 pF, RD = 220 kΩ
-
+4.0
-
ppm



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