STM32F051R4T6TR STMicroelectronics, STM32F051R4T6TR Datasheet - Page 100

• Manufacturer Part Number: STM32F051R4T6TR
• Description: ARM Microcontrollers - MCU ARM Cortex M0 16kB 48 MHz CPU 8kB Flash
• Manufacturer: STMicroelectronics

Specifications of STM32F051R4T6TR

• Rohs: yes

STM32F051x
7.2.1
7.2.2
Table 72.
Reference document
JESD51-2 Integrated Circuits Thermal Test Method Environment Conditions - Natural
Convection (Still Air). Available from www.jedec.org
Selecting the product temperature range
When ordering the microcontroller, the temperature range is specified in the ordering
information scheme shown in
Each temperature range suffix corresponds to a specific guaranteed ambient temperature at
maximum dissipation and, to a specific maximum junction temperature.
As applications do not commonly use the STM32F05xx at maximum dissipation, it is useful
to calculate the exact power consumption and junction temperature to determine which
temperature range will be best suited to the application.
The following examples show how to calculate the temperature range needed for a given
application.
Example 1: High-performance application
Assuming the following application conditions:
Using the values obtained in
This is within the range of the suffix 6 version parts (–40 < T
General operating
In this case, parts must be ordered at least with the temperature range suffix 6 (see
Section 8: Part
Symbol
Θ
JA
Maximum ambient temperature T
I
level with I
at low level with I
P
P
This gives: P
P
–
T
DDmax
Jmax
INTmax
IOmax
Dmax
For LQFP64, 45 °C/W
Thermal resistance junction-ambient
LQFP64 - 10 × 10 mm / 0.5 mm pitch
Thermal resistance junction-ambient
LQFP48 - 7 × 7 mm
Thermal resistance junction-ambient
LQFP32 - 7 × 7 mm
Thermal resistance junction-ambient
UFQFPN32 - 5 × 5 mm
= 82 °C + (45 °C/W × 447 mW) = 82 °C + 20.115 °C = 102.115 °C
= 175 + 272 = 447 mW
= 50 mA, V
= 20 × 8 mA × 0.4 V + 8 × 20 mA × 1.3 V = 272 mW
Package thermal characteristics
= 50 mA × 3.5 V= 175 mW
OL
numbering).
INTmax
= 8 mA, V
conditions.
OL
DD
= 175 mW and P
= 20 mA, V
= 3.5 V, maximum 20 I/Os used at the same time in output at low
OL
Table 72
Doc ID 022265 Rev 3
Section 8: Part
= 0.4 V and maximum 8 I/Os used at the same time in output
Parameter
OL
Amax
T
= 1.3 V
Jmax
IOmax
= 82 °C (measured according to JESD51-2),
is calculated as follows:
numbering.
= 272 mW:
J
< 105 °C) see
Package characteristics
Value
45
55
56
38
Table 20:
101/105
°C/W
Unit