STM8AP5268 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

STM8AP5268

Automotive 8-bit MCU, with up to 128 Kbyte Flash, data EEPROM, 10-bit ADC, timers, LIN, CAN, USART, SPI, I2C, 3 to 5.5 V

STMicroelectronics 

Package information

STM8AF526x/8x/Ax STM8AF6269/8x/Ax

11.6.2

Selecting the product temperature range

When ordering the microcontroller, the temperature range is specified in the order code (see

Figure 60: STM8AF526x/8x/Ax and STM8AF6269/8x/Ax ordering information scheme1 on

page 111).

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

PINTmax = 8 mA x 5 V = 400 mW

PIOmax = 20 x 8 mA x 0.4 V = 64 mW

This gives:

PINTmax = 400 mW and PIOmax 64 mW

PDmax = 400 mW + 64 mW

Thus:

PDmax = 464 mW.

Using the values obtained in Table 54: Thermal characteristics TJmax is calculated as

follows:

For LQFP64 46 °C/W

Tjmax = 82 °C + (46 °C/W x 464 mW) = 82 °C + 21 °C = 103 ° C

This is within the range of the suffix C version parts (-40 °C < Tj < 125 ° C).

Parts must be ordered at least with the temperature range suffix C.

110/125

DocID14395 Rev 15

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