LTC2936
7
2936fa
For more information www.linear.com/LTC2936
pin FuncTions
ASEL0, ASEL1: I
2
C Bus Address Select Inputs. Can be
connected to ground, V
DD33
or can be left unconnected
to select 1 out of 9 addresses.
CMP1-CMP6: Comparator Open-Drain Outputs. These pins
assert low in response to a user-programmable combina
-
tion of UV and OV conditions on the associated channels.
Each output has a 15µA pull-up to V
DD33
.
Exposed Pad (QFN Package Only): Ground. The exposed
pad may be left open or connected to device ground.
GND: Ground.
GPI1, GPI2: General Purpose Inputs. Configurable as one
of five 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.
• Write Protect (WP), active low, 15µA pull-up to V
DD33
.
I
2
C write commands are ignored.
• Hi-Z Auxiliary Comparator (AUXC) Input. Program-
mable polarity.
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.
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-V6: Voltage Supervisor Input. Programmable thresh-
olds 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).
See the Applications Information section for information
on unused channels.
V
DD33
: 3.3V Internal Regulator Output. A 100nF capaci-
tor to ground is required. The internal regulator can be
disabled by connecting V
PWR
to V
DD33
and operating from
an external 3.3V supply.
V
PWR
: Power Supply Input (Internal Regulator Input).
Power supply range is 3.4V to 13.9V. Bypass this pin to
ground with a 100nF (or greater) capacitor. The internal
regulator can be disabled by connecting V
PWR
to V
DD33
and operating from an external 3.3V supply.
PIN NAME PIN TYPE PIN (SSOP) PIN (QFN)
V3 IN 1 23
V2 IN 2 24
V1 IN 3 1
V
PWR
IN 4 2
V
DD33
OUT/IN 5 3
GND GND 6 4, 25
GPIO3 IN/OUT 7 5
ASEL0 IN 8 6
ASEL1 IN 9 7
CMP4 OUT 10 8
CMP3 OUT 11 9
CMP2 OUT 12 10
CMP1 OUT 13 11
CMP6 OUT 14 12
CMP5 OUT 15 13
GPIO2 IN/OUT 16 14
GPIO1 IN/OUT 17 15
SDA IN/OUT 18 16
SCL IN 19 17
GPI2 IN 20 18
GPI1 IN 21 19
V6 IN 22 20
V5 IN 23 21
V4 IN 24 22
