STM8S003K3(2012) View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

STM8S003K3
(Rev.:2012)

Value line, 16 MHz STM8S 8-bit MCU, 8 Kbytes Flash, 128 bytes data EEPROM, 10-bit ADC, 3 timers, UART, SPI, I²C

STMicroelectronics 

Thermal characteristics

STM8S003K3 STM8S003F3

11 Thermal characteristics

The maximum chip junction temperature (TJ max) must never exceed the values given in

Operating conditions.

The maximum chip-junction temperature, TJmax, in degrees Celsius, may be calculated using

the following equation:

TJmax = TAmax + (PDmax x ΘJA)

Where:

• TAmax is the maximum ambient temperature in °C

• ΘJA is the package junction-to-ambient thermal resistance in °C/W

• PDmax is the sum of PINTmax and PI/Omax (PDmax = PINTmax + PI/Omax)

• PINTmax is the product of IDD andVDD, expressed in Watts. This is the maximum chip internal

power.

• PI/Omax represents the maximum power dissipation on output pins

Where: PI/Omax =Σ (VOL*IOL) + Σ((VDD-VOH)*IOH), taking into account the actual VOL/IOL and

VOH/IOH of the I/Os at low and high level in the application.

Table 54: Thermal characteristics

Symbol

Parameter(1)

Value

Unit

ΘJA

Thermal resistance junction-ambient

84

TSSOP20 - 4.4 mm

ΘJA

Thermal resistance junction-ambient

90

UFQFPN20 - 3 x 3 mm

°C/W

ΘJA

Thermal resistance junction-ambient

60

LQFP32 - 7 x 7 mm

(1)Thermal resistances are based on JEDEC JESD51-2 with 4-layer PCB in a natural

convection environment.

11.1

11.2

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 order code.

94/100

DocID018576 Rev 3

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