LTC1726 LINER [Linear Technology], LTC1726 Datasheet - Page 3

• Manufacturer Part Number: LTC1726
• Description: Triple Supply Monitor and uP Supervisor with Adjustable Reset and Watchdog Timer
• Manufacturer: LINER [Linear Technology]

ELECTRICAL CHARACTERISTICS
temperature range, otherwise specificaitons are at T
otherwise noted.
SYMBOL
t
t
V
V
V
V
t
t
LTC1726-5 Only
V
Note 1: Absolute Maximum Ratings are those values beyond which the life
of the device may be impaired.
Note 2: All voltage values are with respect to GND.
Note 3: The LTC1726E is guaranteed to meet performance specifications
from 0 C to 70 C. Specifications over the –40 C to 85 C operating
temperature range are assured by design, characterization and correlation
with statistical process controls.
TYPICAL PERFOR A CE CHARACTERISTICS
RT
UV
WP
WT
OH
OL
IH
IL
OVR
4.750
4.700
4.675
4.625
4.600
4.725
4.650
–60
V
vs Temperature
CC5
–40
PARAMETER
Reset Time-Out Period
V
RST Output Voltage High (Note 5)
RST Output Voltage Low
WDI Input Threshold High
WDI Input Threshold Low
WDI Pulse Width
Watchdog Time-Out Period
WDI Leakage Current
V
CC
CC5
Threshold Voltage
–20
Undervoltage Detect to RST
Reset Override Voltage (Note 6)
TEMPERATURE ( C)
0
20
40
W
60
80
1726 G01
U
100
3.135
3.125
3.115
3.105
3.095
3.085
3.075
3.065
3.055
3.035
3.045
– 60
A
V
vs Temperature
= 25 C. V
CONDITIONS
C
V
Threshold V
I
I
I
I
I
C
Override V
CC3
SOURCE
SINK
SINK
SINK
SINK
RT
CC25
WT
–40
= 1500pF
Threshold Voltage
= 1500pF
The
= 2.5mA, V
= 100 A, V
= 100 A, V
= 100 A, V
/V
– 20
CC5
= 1 A
TEMPERATURE ( C)
CC5
CC3
, V
RT
denotes specifications which apply over the full operating
0
CC3
Ability to Assert RST
by More Than 1%
= 3.3V, V
CC3
CC3
CC3
CC5
20
or V
Note 4: Both V
which pin has the greatest potential.
Note 5: The output pin RST has weak internal pull-ups to V
6 A. However, external pull-up resistors may be used when faster rise
times are required or for V
Note 6: The V
than approximately 4.15V. Above this point the override is turned off and
the V
/V
= 1V, V
= 0V, V
= 1V, V
CCA
CC25
40
CC5
CC5
Less Than Reset
= 0V
pin functions normally.
60
CC5
CC5
CC5
= 5V, V
/V
/V
/V
CC5
80
CC3
CC25
CC25
CC25
1726 G02
reset override voltage is valid for an operating range less
and V
100
= 0V
= 1V
= 1V
CC25
CC25
= 2.5V, V
OH
1.015
1.010
1.005
1.000
0.995
0.990
0.985
/V
voltages greater than V
CC5
–60
V
vs Temperature
0.3 • V
can act as the supply depending on
V
CCA
CC3
CCA
MIN
–40 –20
3.5
40
23
Threshold Voltage
– 1
CC3
= V
V
CC3
CC3
TEMPERATURE ( C)
0.15
0.05
0.05
0.05
TYP
130
0
33
5
unless
0.025
CC3
20
LTC1726
0.7 • V
.
40
MAX
CC3
6.5
0.4
0.3
0.3
0.3
43
1
CC3
60
of typically
80
1726 G03
UNITS
3
100
ms
ms
ns
V
V
V
V
V
V
V
A
V
s