23
SWRS225B – FEBRUARY 2019 – REVISED MARCH 2020
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Specifications
Copyright © 2019–2020, Texas Instruments Incorporated
lists the brownout and blackout voltage levels.
Table 5-1. Brownout and Blackout Voltage Levels
CONDITION
VOLTAGE LEVEL
UNIT
V
brownout
2.1
V
V
blackout
1.67
V
(1)
TI recommends using the lowest possible drive strength that is adequate for the applications. This recommendation minimizes the risk of
interference to the WLAN radio and reduces any potential degradation of RF sensitivity and performance. The default drive strength
setting is 6 mA.
(2)
The nRESET pin must be held below 0.6 V for the device to register a reset.
5.9
Electrical Characteristics for DIO Pins
T
A
= 25°C, V
BAT
= 3.3 V
PARAMETER
TEST CONDITIONS
(1)
MIN
NOM
MAX
UNIT
C
IN
Pin capacitance
4
pF
V
IH
High-level input voltage
0.65 × V
DD
V
DD
+ 0.5 V
V
V
IL
Low-level input voltage
–0.5
0.35 × V
DD
V
I
IH
High-level input current
5
nA
I
IL
Low-level input current
5
nA
V
OH
High-level output voltage
IL = 2 mA; configured I/O drive
strength = 2 mA;
2.4 V
≤
V
DD
< 3.6 V
V
DD
× 0.8
V
IL = 4 mA; configured I/O drive
strength = 4 mA;
2.4 V
≤
V
DD
< 3.6 V
V
DD
× 0.7
V
IL = 8 mA; configured I/O drive
strength = 8 mA;
2.4 V
≤
V
DD
< 3.6 V
V
DD
× 0.7
V
IL = 2 mA; configured I/O drive
strength = 2 mA;
2.3 V
≤
V
DD
< 2.4 V
V
DD
× 0.75
V
V
OL
Low-level output voltage
IL = 2 mA; configured I/O drive
strength = 2 mA;
2.4 V
≤
V
DD
< 3.6 V
V
DD
× 0.2
V
IL = 4 mA; configured I/O drive
strength = 4 mA;
2.4 V
≤
V
DD
< 3.6 V
V
DD
× 0.2
V
IL = 8 mA; configured I/O drive
strength = 8 mA;
2.4 V
≤
V
DD
< 3.6 V
V
DD
× 0.2
V
IL = 2 mA; configured I/O drive
strength = 2 mA;
2.3 V
≤
V
DD
< 2.4 V
V
DD
× 0.25
V
I
OH
High-level
source current
2-mA drive
2
mA
4-mA drive
4
6-mA drive
6
I
OL
Low-level sink
current
2-mA drive
2
mA
4-mA drive
4
6-mA drive
6
V
IL
nRESET
(2)
0.6
V