LTC1326-2.5 Linear Technology, LTC1326-2.5 Datasheet - Page 6

• Manufacturer Part Number: LTC1326-2.5
• Description: Micropower Precision Triple Supply Monitors
• Manufacturer: Linear Technology

LTC1326/LTC1326-2.5
PIN
V
the IC. Bypass to ground with 0.1 F ceramic capacitor.
V
drive for the RST output FET when the voltage on V
less than the voltage on V
V
the Applications Information section).
V
gate drive for RST output FET when the voltage on V
is less than the voltage on V
to V
V
used as a logic input with a 1V threshold. If unused it can
be tied to either V
GND (Pin 4): Ground.
RST (Pin 5): Reset Logic Output. Active high CMOS logic
output, drives high to V
An external pull-down on the RST pin will drive this pin
high.
6
CC3
CC5
CC3
CC25
CCA
U
CC3
(Pin 1): 3.3V Sense Input and Power Supply Pin for
(Pin 2) (LTC1326): 5V Sense Input. Used as gate
(see Dual and Single Supply Monitor Operation in
(Pin 3): 1V Sense, High Impedance Input. Can be
(Pin 2) (LTC1326-2.5): 2.5V Sense Input. Used as
FUNCTIONS
.
U
CC3
U
or V
CC3
CC5
CC25
, buffered complement of RST.
CC25
. If unused, it can be tied to
.
. If unused it can be tied
CC3
CC3
is
RST (Pin 6): Reset Logic Output. Active low, open-drain
logic output with weak pull-up to V
greater than V
when one or more of the supplies are below trip
thresholds and held for 200ms after all supplies become
valid. Also asserted after PBR is held low for more than
2 seconds and for an additional 200ms after PBR is
released.
SRST (Pin 7): Soft Reset. Active low, open-drain logic
output with weak pull-up to V
greater than V
for 100 s after PBR is held low for less than 2 seconds
and released.
PBR (Pin 8): Push-Button Reset. Active low logic input
with weak pull-up to V
V
than 2 seconds, outputs a soft reset 100 s pulse on the
SRST pin. When PBR is asserted for greater than 2
seconds, the RST output is forced low and remains low
until 200ms after PBR is released.
CC3
when interfacing to 5V logic. When asserted for less
CC3
CC3
when interfacing to 5V logic. Asserted
when interfacing to 5V logic. Asserted
CC3
. Can be pulled up greater than
CC3
CC3
. Can be pulled up
. Can be pulled up