STR751FR2 STMicroelectronics, STR751FR2 Datasheet - Page 80
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STR751FR2
Manufacturer Part Number
STR751FR2
Description
ARM7TDMI-S™ 32-BIT MCU with Flash, SMI, 3 std 16-bit timers, PWM timer, fast 10-bit ADC, I2C, UART, SSP, USB and CAN
Manufacturer
STMicroelectronics
Datasheet
1.STR755FV2.pdf
(84 pages)
Specifications of STR751FR2
Smart Low Power Modes
SLOW, WFI, STOP and STANDBY with backup registers
Conversion Time
min. 3.75 μs
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Package characteristics
7.2.2
80/84
Selecting the product temperature range
When ordering the microcontroller, the temperature range is specified in the order code
Table 49: Order codes on page
The following example shows how to calculate the temperature range needed for a given
application.
Assuming the following application conditions:
Using the values obtained in
Figure 50. LQFP100 P
Maximum ambient temperature T
I
with I
This gives: P
Thus: P
–
–
DDmax
For LQFP100, 46°C/W
This is within the range of the suffix 6 version parts (-40 < T
In this case, parts must be ordered at least with the temperature range suffix 6
(see
For BGA64, 58°C/W
This is within the range of the suffix 7 version parts (-40 < T
In this case, parts must be ordered at least with the temperature range suffix 7
(see
OL
=8 mA, V
Dmax
= 8 mA, V
T
Table 49: Order codes on page
T
Table 49: Order codes on page
Jmax
Jmax
INTmax
= 464 mW
DD
= 82° C + (46° C/W x 464 mW) = 82°C + 21°C = 103° C
= 82° C + (58° C/W x 464 mW) = 82°C + 27°C = 109° C
700
600
500
400
300
200
100
OL
0
= 5 V, maximum 20 I/Os used at the same time in output at low level
= 400 mW and P
Dmax
= 0.4 V
Table 48
P
vs T
IOmax
81.
P
INTmax
A
P
Dmax
= 20 x 8 mA x 0.4V = 64 mW
Amax
T
T
Jmax
A
STR750Fxx STR751Fxx STR752Fxx STR755Fxx
= 8 mA x 5 V= 400 mW
IOmax
= 400 mW + 64 mW
(° C)
= 82 °C (measured according to JESD51-2),
is calculated as follows:
81).
81).
64 mW:
Suffix 6
Suffix 7
J
J
< 105° C).
< 125° C).