STM32F103CB STMicroelectronics, STM32F103CB Datasheet - Page 52

• Manufacturer Part Number: STM32F103CB
• Description: Mainstream Performance line, ARM Cortex-M3 MCU with 128 Kbytes Flash, 72 MHz CPU, motor control, USB and CAN
• Manufacturer: STMicroelectronics

Specifications of STM32F103CB

• Conversion Range: 0 to 3.6 V
• Peripherals Supported: timers, ADC, SPIs, I2Cs and USARTs

Electrical characteristics
Table 23.
1. Based on characterization, not tested in production.
2. Refer to the note and caution paragraphs below the table, and to the application note AN2867 “Oscillator design guide for
3.
Note:
Caution:
52/99
t
SU(LSE)
Symbol
ST microcontrollers”.
reached. This value is measured for a standard crystal and it can vary significantly with the crystal manufacturer
t
SU(LSE)
R
g
C
I
2
m
F
(3)
is the startup time measured from the moment it is enabled (by software) to a stabilized 32.768 kHz oscillation is
LSE oscillator characteristics (f
For C
15 pF range selected to match the requirements of the crystal or resonator. C
usually the same size. The crystal manufacturer typically specifies a load capacitance which
is the series combination of C
Load capacitance C
C
between 2 pF and 7 pF.
To avoid exceeding the maximum value of C
to use a resonator with a load capacitance C
capacitance of 12.5 pF.
Example: if you choose a resonator with a load capacitance of C
then C
Feedback resistor
Recommended load capacitance
versus equivalent serial
resistance of the crystal (R
LSE driving current
Oscillator transconductance
Startup time
stray
L1
is the pin capacitance and board or trace PCB-related capacitance. Typically, it is
L1
and C
= C
Parameter
L2
L2
= 8 pF.
it is recommended to use high-quality ceramic capacitors in the 5 pF to
L
has the following formula: C
S
)
L1
Doc ID 13587 Rev 13
and C
V
Conditions
R
LSE
V
stabilized
DD
S
IN
V
= 30 KΩ
DD
= 3.3 V
= 32.768 kHz)
= V
L2
is
.
SS
L1
L
≤
and C
7 pF. Never use a resonator with a load
T
T
T
T
L
T
T
T
T
A
A
A
A
A
A
A
= C
A
(1) (2)
= -10 °C
= -20 °C
= -30 °C
= -40 °C
= 50 °C
= 25 °C
= 10 °C
L2
= 0 °C
L1
(15 pF) it is strongly recommended
x C
STM32F103x8, STM32F103xB
L2
/ (C
L
Min
= 6 pF, and C
5
L1
+ C
Typ
1.5
2.5
10
17
32
60
L2
5
4
6
) + C
L1
and C
Max
stray
1.4
15
stray
= 2 pF,
L2,
where
µA/V
Unit
MΩ
pF
µA
are
s