STR911FM42X6 STMicroelectronics, STR911FM42X6 Datasheet - Page 69

• Manufacturer Part Number: STR911FM42X6
• Description: MCU 256K FLASH 96K SRA, USB CAM
• Manufacturer: STMicroelectronics
• Series: STR9r

Specifications of STR911FM42X6

• Core Processor: ARM9
• Core Size: 32-Bit
• Speed: 96MHz
• Connectivity: CAN, I²C, Microwire, SPI, SSP, UART/USART, USB
• Peripherals: Brown-out Detect/Reset, DMA, Motor Control PWM, POR, PWM, WDT
• Number Of I /o: 40
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 96K x 8
• Voltage - Supply (vcc/vdd): 1.65 V ~ 2 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 80-LQFP
• For Use With: MCBSTR9UME - BOARD EVAL MCBSTR9 + ULINK-MEMCBSTR9U - BOARD EVAL MCBSTR9 + ULINK2MCBSTR9 - BOARD EVAL STM STR9 SERIES
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Other names: 497-5060; 497-5060-2; 497-5060-2; STR911FM42X6T

STR91xF
7.1
Thermal characteristics
The average chip-junction temperature, T
The average chip-junction temperature, T
following equation:
Where:
P
Most of the time for the applications P
P
memories. The worst case P
An approximate relationship between P
Therefore (solving equations 1 and 2):
where:
Table 30.
I/O
I/O
Symbol
may be significant if the device is configured to drive continuously external modules and/or
represents the Power Dissipation on Input and Output Pins;
T
–
–
–
–
P
K = P
–
J
Θ
Θ
D
JA
JA
= T
= K / (T
T
Θ
P
P
Power.
K is a constant for the particular part, which may be determined from equation (3) by
measuring P
and T
D
A
A
D
INT
JA
Thermal characteristics
x (T
+ (P
is the Ambient Temperature in °C,
is the sum of P
is the Package Junction-to-Ambient Thermal Resistance, in ° C/W,
is the product of I
J
J
A
Thermal Resistance Junction-Ambient
LQFP 80 - 12 x 12 mm / 0.5 mm pitch
Thermal Resistance Junction-Ambient
LQFP128 - 14 x 14 mm / 0.4 mm pitch
may be obtained by solving equations (1) and (2) iteratively for any value of T
D
+ 273°C) (2)
+ 273°C) + Θ
x Θ
JA
D
(at equilibrium) for a known T
)(1)
INT
INT
JA
and P
DD
of the STR91xF is 500mW (I
x P
and V
Parameter
D
I/O
I/O
2
D
(3)
< P
(P
DD
and T
J
J
, in degrees Celsius, may be calculated using the
D
must never exceed 125° C.
, expressed in Watts. This is the Chip Internal
INT
= P
J
and may be neglected. On the other hand,
INT
(if P
+ P
I/O
A.
I/O
is neglected) is given by:
Using this value of K, the values of P
),
DD
x V
DD
, or 250mA x 2.0V).
Package mechanical data
Value
41.5
38
°C/W
°C/W
Unit
69/73
D
A
.