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ST10F276E Datasheet(PDF) 205 Page - STMicroelectronics

Part # ST10F276E
Description  16-bit MCU with MAC unit 832 Kbyte Flash memory and 68 Kbyte RAM
PDF  235 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST10F276E Datasheet(HTML) 205 Page - STMicroelectronics

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ST10F276E
Electrical characteristics
Doc ID 12303 Rev 3
205/235
Figure 54.
Crystal oscillator and resonator connection diagram
The given values of CA do not include the stray capacitance of the package and of the
printed circuit board: The negative resistance values are calculated assuming additional 5pF
to the values in the table. The crystal shunt capacitance (C0), the package and the stray
capacitance between XTAL1 and XTAL2 pins is globally assumed equal to 4pF.
The external resistance between XTAL1 and XTAL2 is not necessary, since already present
on the silicon.
23.8.14
32 kHz oscillator specifications
Conditions: VDD = 5V ±10%, TA = -40 / +125°C
Table 99.
Negative resistance (absolute min. value @125oC / VDD = 4.5V)
CA (pF)
12
15
18
22
27
33
39
47
4 MHz
460
Ω
550
Ω
675
Ω
800
Ω
840
Ω
1000
Ω
1180
Ω
1200
Ω
8 MHz
380
Ω
460
Ω
540
Ω
640
Ω
580
Ω
---
12 MHz
370
Ω
420
Ω
360
Ω
-----
Table 100. 32 kHz Oscillator specifications
Symbol
Parameter
Conditions
Value
Unit
Min.
Typ.
Max.
gm32
Oscillator(1)
1.
At power-on a high current biasing is applied for faster oscillation start-up. Once the oscillation is started,
the current biasing is reduced to lower the power consumption of the system.
Start-up
20
31
50
µA/V
Normal run
8
17
30
VOSC32
Oscillation amplitude(2))
Peak to peak
0.5
1.0
2.4
V
VAV32
Oscillation-voltage level(2)
Sine wave middle
0.7
0.9
1.2
tSTUP32
Oscillator start-up time(2)
Stable VDD
-1
5
s



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