Datasheet

3
LTC1326/LTC1326-2.5
132625fc
V
RT3
Reset Threshold V
CC3
0°C ≤ T
A
≤ 70°C ● 3.094 3.118 3.135 V
–40°C ≤ T
A
≤ 85°C ● 3.052 3.118 3.143 V
V
RT5
Reset Threshold V
CC5
(LTC1326) 0°C ≤ T
A
≤ 70°C ● 4.687 4.725 4.750 V
–40°C ≤ T
A
≤ 85°C ● 4.625 4.725 4.762 V
V
RT25
Reset Threshold V
CC25
(LTC1326-2.5) 0°C ≤ T
A
≤ 70°C ● 2.344 2.363 2.375 V
–40°C ≤ T
A
≤ 85°C ● 2.312 2.363 2.381 V
V
RTA
Reset Threshold V
CCA
0°C ≤ T
A
≤ 70°C ● 0.992 1.000 1.007 V
–40°C ≤ T
A
≤ 85°C ● 0.980 1.000 1.007 V
V
CC
V
CC3
Operating Voltage RST in Correct Logic State ● 17V
I
VCC3
V
CC3
Supply Current PBR = V
CC3
● 20 40 µA
I
VCC5
V
CC5
Input Current (LTC1326) V
CC5
= 5V ● 410 µA
I
VCC25
V
CC25
Input Current (LTC1326-2.5) V
CC25
= 2.5V ● 2.8 7 µA
I
VCCA
V
CCA
Input Current V
CCA
= 1V ● –15 0 15 nA
t
RST
Reset Pulse Width RST Low with 10kΩ Pull-Up to V
CC3
0°C ≤ T
A
≤ 70°C ● 140 200 280 ms
–40°C ≤ T
A
≤ 85°C ● 140 200 300 ms
t
SRST
Soft Reset Pulse Width SRST Low with 10kΩ Pull-Up to V
CC3
● 50 100 200 µs
t
UV
V
CC
Undervoltage Detect to RST V
CC25
, V
CC3
or V
CCA
Less Than Reset 13 µs
Threshold V
RT
by More Than 1%
I
PBR
PBR Pull-Up Current PBR = 0V
0°C ≤ T
A
≤ 70°C ● 3710 µA
–40°C ≤ T
A
≤ 85°C ● 3715 µA
V
IL
PBR, RST Input Low Voltage ● 0.8 V
V
IH
PBR, RST Input High Voltage ● 2V
t
PW
PBR Min Pulse Width ● 40 ns
t
DB
PBR Debounce Deassertion of PBR Input to SRST ● 20 35 ms
Output (PBR Pulse Width = 1µs)
t
PB
PBR Assertion Time for Transition PBR Held Less Than V
IL
from Soft to Hard Reset Mode 0°C ≤ T
A
≤ 70°C ● 1.4 2.0 2.8 s
–40°C ≤ T
A
≤ 85°C ● 1.4 2.0 3.0 s
V
OL
RST Output Voltage Low I
SINK
= 5mA ● 0.15 0.4 V
I
SINK
= 100µA, V
CC3
= 1V, V
CC5
= 0V ● 0.05 0.4 V
0°C ≤ T
A
≤ 70°CV
CC3
= 0V, V
CC5
= 1V ● 0.05 0.4 V
V
CC3
= 1V, V
CC5
= 1V ● 0.05 0.4 V
I
SINK
= 100µA, V
CC3
= 1.1V, V
CC5
= 0V ● 0.05 0.4 V
–40°C ≤ T
A
≤ 85°CV
CC3
= 0V, V
CC5
= 1.1V ● 0.05 0.4 V
V
CC3
= 1.1V, V
CC5
= 1.1V ● 0.05 0.4 V
I
SINK
= 100µA, V
CC3
= 1V, V
CC25
= 0V ● 0.05 0.4 V
0°C ≤ T
A
≤ 70°CV
CC3
= 0V, V
CC25
= 1V ● 0.05 0.4 V
V
CC3
= 1V, V
CC25
= 1V ● 0.05 0.4 V
I
SINK
= 100µA, V
CC3
= 1.1V, V
CC25
= 0V ● 0.05 0.4 V
–40°C ≤ T
A
≤ 85°CV
CC3
= 0V, V
CC25
= 1.1V ● 0.05 0.4 V
V
CC3
= 1.1V, V
CC25
= 1.1V ● 0.05 0.4 V
SRST Output Voltage Low I
SINK
= 2.5mA ● 0.15 0.4 V
RST Output Voltage Low I
SINK
= 2.5mA ● 0.15 0.4 V
ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC3
= 3.3V, V
CC5
= 5V (for LTC1326),V
CC25
= 2.5V (for LTC1326-2.5),
V
CCA
= V
CC3
, T
A
= 25°C unless otherwise noted.