LM3S3749 Datasheet, PDF (826/898 Pages) Texas Instruments – Stellaris® LM3S3749 Microcontroller

Electrical Characteristics
23 Electrical Characteristics
23.1
23.1.1
23.1.2
DC Characteristics
Maximum Ratings
The maximum ratings are the limits to which the device can be subjected without permanently
damaging the device.
Note: The device is not guaranteed to operate properly at the maximum ratings.
Table 23-1. Maximum Ratings
Characteristic^a
I/O supply voltage (V_DD)
Core supply voltage (V_DD25)
Analog supply voltage (V_DDA)
Battery supply voltage (V_BAT)
Input voltage
Input voltage for a GPIO configured as an analog input
Maximum current per output pins
Maximum input voltage on a non-power pin when the
microcontroller is unpowered
a. Voltages are measured with respect to GND.
Symbol
V_DD
V_DD25
V_DDA
V_BAT
V_IN
I
V_NON
Value
Unit
Min
Max
0
4
V
0
3
V
0
4
V
0
4
V
-0.3
5.5
V
-0.3
V_DD + 0.3
V
-
25
mA
-
300
mV
Important: This device contains circuitry to protect the inputs against damage due to high-static
voltages or electric fields; however, it is advised that normal precautions be taken to
avoid application of any voltage higher than maximum-rated voltages to this
high-impedance circuit. Reliability of operation is enhanced if unused inputs are
connected to an appropriate logic voltage level (for example, either GND or V_DD).
Recommended DC Operating Conditions
For special high-current applications, the GPIO output buffers may be used with the following
restrictions. With the GPIO pins configured as 8-mA output drivers, a total of four GPIO outputs may
be used to sink current loads up to 18 mA each. At 18-mA sink current loading, the V_OL value is
specified as 1.2 V. The high-current GPIO package pins must be selected such that there are only
a maximum of two per side of the physical package with the total number of high-current GPIO
outputs not exceeding four for the entire package.
Table 23-2. Recommended DC Operating Conditions
Parameter
V_DD
V_DD25
V_DDA
V_BAT
V_IH
V_IL
Parameter Name
I/O supply voltage
Core supply voltage
Analog supply voltage
Battery supply voltage
High-level input voltage
Low-level input voltage
Min
Nom
Max
Unit
3.0
3.3
3.6
V
2.25
2.5
2.75
V
3.0
3.3
3.6
V
2.3
3.0
3.6
V
2.0
-
5.0
V
-0.3
-
1.3
V
826
November 17, 2011
Texas Instruments-Production Data