LTC2933
8
2933fa
For more information www.linear.com/LTC2933
pin FuncTions
ASEL: Ternary I
2
C Bus Address Select. Can be connected
to ground, V
DD33
, or left unconnected to select one of
three addresses.
Exposed Pad (DFN Package Only): Ground. The exposed
pad may be left open or connected to device ground.
GND: Ground.
GPIO1, GPIO2, GPIO3: General Purpose Input/Output.
Each GPIO is configurable as either input, open-drain
output, or weak pull-up output. Output polarity is pro
-
grammable. When configured as outputs, these pins
respond to selectable UV conditions, OV conditions,
MR
,
auxiliary comparator output, or other input-configured
GPIO
n
with programmable delay-on-release. These pins
can also be configured as ALERT per SMBus standard.
When configured as inputs, each pin can be mapped to
any other output. These pins have an optional 15µA pull-
up to V
DD33
. Unused GPIO pins should be tied to V
DD33
or have their pull-up enabled.
GPI1, GPI2: General Purpose Inputs. Configurable as one
of four possibilities (no duplication):
• Manual reset (MR) input, active low, 15µA pull-up to
V
DD33
• UV disable (UVDIS), active low, 15µA pull-up to V
DD33
.
Outputs ignore UV faults.
• Margin (MARG), active low, 15µA pull-up to V
DD33
.
Outputs ignore both UV and OV faults.
• Hi-Z Auxiliary Comparator (AUXC) Input. Program
-
mable Polarity.
SCL: I
2
C Serial Clock (400kHz maximum). Needs external
pull-up resistor.
SDA: I
2
C Serial Data. Needs external pull-up resistor.
V1: High Voltage Supervisor Input. Programmable thresh-
olds, from 1V to 5.8V in 20mV increments (medium range)
or
from 2.5V
to 13.9V in 50mV increments (high range).
Bypass this pin to ground with a 0.1µF (or greater) capaci
-
tor and apply 3.4V minimum through a low impedance, if
used to power the part. The highest voltage on V1 to V4
is automatically selected as supply voltage. If unused, tie
to ground. See the Applications Information section for
information on unused channels.
V2 to V4: Low Voltage Supervisor Input. Programmable
thresholds from 0.2V to 1.2V in 4mV increments (preci
-
sion range), from 0.5V to 3V in 10mV increments (low
range) or from 1V to 5.8V in 20mV increments (medium
range). Bypass this pin to ground with a 0.1µF (or greater)
capacitor and apply 3.4V minimum through a low imped
-
ance, if used to power the part. The highest voltage on
V1 to
V4 is automatically selected as supply voltage. See
the Applications Information section for information on
unused channels.
V5 to V6: Low Voltage Supervisor Input. Programmable
thresholds from 0.2V to 1.2V in 4mV increments (precision
range), from 0.5V to 3V in 10mV increments (low range)
or from 1V to 5.8V in 20mV increments (medium range).
If unused, tie to ground. See the Applications Information
section for information on unused channels.
V
DD33
: 3.3V Internal Regulator Output. A 220nF capacitor
to ground is required.
PIN NAME PIN TYPE PIN (DFN) PIN (SSOP)
V4 In 1 1
V3 In 2 2
V2 In 3 3
V1 In 4 4
V
DD33
Out 5 5
GND Ground 6 6
GPIO3 In/Out 7 7
ASEL In 8 8
GPIO2 In/Out 9 9
GPIO1 In/Out 10 10
SDA In/Out 11 11
SCL In 12 12
GPI2 In 13 13
GPI1 In 14 14
V6 In 15 15
V5 In 16 16
Exposed Pad 17 N/A
