LM3S3748 Datasheet, PDF (691/753 Pages) List of Unclassifed Manufacturers – Microcontroller

LM3S3748 Microcontroller
24 Electrical Characteristics
24.1
24.1.1
24.1.2
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 24-1. Maximum Ratings
Characteristic
a
Symbol Value Unit
Min Max
I/O supply voltage (V_DD)
V_DD 0 4 V
Core supply voltage (V_DD25)
V_DD25 0 3 V
Analog supply voltage (V_DDA)
V_DDA 0 4 V
Battery supply voltage (V_BAT)
V_BAT 0 4 V
Input voltage
V_IN -0.3 5.5 V
Maximum current per output pins I
- 25 mA
a. Voltages are measured with respect to GND.
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 24-2. Recommended DC Operating Conditions
Parameter Parameter Name
Min Nom Max Unit
V_DD I/O supply voltage
3.0
3.3
3.6
V
V_DD25 Core supply voltage
2.25 2.5 2.75
V
V_DDA
V_BAT
V_IH
Analog supply voltage
Battery supply voltage
High-level input voltage
3.0
3.3
3.6
V
2.3
3.0
3.6
V
2.0
-
5.0
V
V_IL Low-level input voltage
-0.3
-
1.3
V
V_SIH High-level input voltage for Schmitt trigger inputs 0.8 * V_DD -
V_DD
V
V_SIL Low-level input voltage for Schmitt trigger inputs
0
- 0.2 * V_DD V
April 08, 2008
691
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