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参数资料
| 型号： | SPEAR-09-P022 |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 1 CHANNEL(S), 1000M bps, I2C BUS CONTROLLER, PBGA420 |
| 封装： | 23 X 23 MM, 1.81 MM HEIGHT, ROHS COMPLIANT, PLASTIC, BGA-420 |
| 文件页数： | 27/40页 |
| 文件大小： | 328K |
| 代理商： | SPEAR-09-P022 |
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SPEAR-09-P022
Electrical characteristics
5
Electrical characteristics
5.1
Absolute maximum ratings
This product contains devices to protect the inputs against damage due to high static
voltages, however it is advisable to take normal precaution to avoid application of any
voltage higher than the specified maximum rated voltages.
The average chip-junction temperature, Tj, can be calculated using the following equation:
Tj = TA + (PD ΘJA)
where:
●
TA is the ambient temperature in °C
●
ΘJA is the package Junction-to-Ambient thermal resistance, which is 34 °C/W
●
PD = PINT + PPORT
–PINT is the chip internal power
–PPORT is the power dissipation on Input and Output pins, user determined
If PPORT is neglected, an approximate relationship between PD is:
PD = K / (Tj + 273 °C)
And, solving first equations:
K = PD (TA + 273 °C) + ΘJA x PD
2
K is a constant for the particular, which can be determined through last equation by
measuring PD at equilibrium, for a know TA
Using this value of K, the value of PD and TJ can be obtained by solving first and second
equation, iteratively for any value of TA.
Table 12.
Absolute maximum ratings
Symbol
Parameter
Value
Unit
VDD core
Supply voltage core
1.6
V
VDD I/O
Supply voltage I/O
4.8
V
VDD PLL
Supply voltage PLL
V
VDD DDR1
Supply voltage DRAM I/F (DDR1)
4.8
V
VDD DDR2
Supply voltage DRAM I/F (DDR2)
4.8
V
VDD RTC
Supply voltage RTC
1.6
V
TJ
Junction temperature
-40 ~ 125
°C
TSTG
Storage temperature
-55 ~ 150
°C
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