参数资料
型号: STM8AF52AATDY
厂商: STMICROELECTRONICS
元件分类: 微控制器/微处理器
英文描述: 8-BIT, FLASH, 24 MHz, MICROCONTROLLER, PQFP80
封装: 14 X 14 MM, ROHS COMPLIANT, LQFP-80
文件页数: 118/120页
文件大小: 2236K
代理商: STM8AF52AATDY
STM8AF52/62xx, STM8AF51/61xx
Electrical characteristics
Doc ID 14395 Rev 7
10.4.2
Selecting the product temperature range
When ordering the microcontroller, the temperature range is specified in the order code (see
The following example shows how to calculate the temperature range needed for a given
application.
Assuming the following application conditions:
Maximum ambient temperature TAmax = 82 °C (measured according to JESD51-2)
–IDDmax = 8 mA
–VDD = 5 V
maximum 20 I/Os used at the same time in output at low-level with IOL = 8 mA
–VOL = 0.4 V
Equation 5
PINTmax = 8 mA x 5 V = 400 mW
Equation 6
PIOmax = 20 x 8 mA x 0.4 V = 64 mW
This gives:
PINTmax = 400 mW and PIOmax 64 mW:
Equation 7
PDmax = 400 mW + 64 mW
Thus:
PDmax = 464 mW.
Using the values obtained in Table 65: Thermal characteristics on page 96 TJmax is
calculated as follows:
For LQFP64 46 °C/W
Equation 8
Tjmax = 82 °C + (46 °C/W x 464 mW) = 82 °C + 21 °C = 103 ° C
This is within the range of the suffix B version parts (-40 °C < Tj < 105 ° C).
Parts must be ordered at least with the temperature range suffix B.
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