TDK blu2i User Manual

5 

 
Absolute maximum ratings for supply voltage and voltages on digital and 
analog pins of the module are listed below. Exceeding these values will 
cause permanent damage. 
 

 

Minimum 

Maximum 

Peak current of power supply 

0mA 

100mA 

Voltage at digital pins 

-0.3V 

3.7V 

Voltage at POWER pin 

3.3V 

7V 

 

 

 

Minimum 

Typical 

Maximum 

Operating temperature 

-20°C 

25°C 

+75°C 

 

 
The current drain from the Vcc power input line is dependent on various 
factors. The three most significant factors are the voltage level at Vcc, 
UART baud rate and the operating mode. 
 
The hardware specification for the blu

2i

 module allows for a voltage 

range of 3.6 to 6.0v at Vcc. Tests have shown that there is no significant 
difference in current draw when Vcc is 5 or 6V. Therefore the data 
presented below, pertains to Vcc levels of 3.6 and 5v only. Tests have 
shown that where power drain is an issue, it is best to keep Vcc at the 
lower end of the range. 
 
The UART baud rate has a bearing on power drain because as is normal 
for digital electronics, the power requirements increase linearly with 
increasing clocking frequencies. Hence higher baud rates result in a 
higher current drain. 
 
Finally with regards to operating mode the significant modes are; idle, 
waiting for a connection, inquiring, initiating a connection and connected. 
With connected mode, it is also relevant to differentiate between no data 

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