ltc1726-5 Linear Technology Corporation, ltc1726-5 Datasheet - Page 3

• Manufacturer Part Number: ltc1726-5
• Description: Triple Supply Monitor And ?p Supervisor With Adjustable Reset And Watchdog Timer
• Manufacturer: Linear Technology Corporation

ELECTRICAL CHARACTERISTICS
temperature range, otherwise specificaitons are at T
otherwise noted.
SYMBOL
V
V
V
V
t
∆t
LTC1726-5 Only
V
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
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.
WP
TYPICAL PERFOR A CE CHARACTERISTICS
OH
OL
IH
IL
OVR
WT
4.750
4.725
4.700
4.675
4.625
4.600
4.650
–60
V
vs Temperature (LTC1726-5)
CC5
PARAMETER
RST Output Voltage High (Note 6)
RST Output Voltage Low
WDI Input Threshold High
WDI Input Threshold Low
WDI Pulse Width
Watchdog Time-Out Period Variation
WDI Leakage Current
V
–40
CC5
Threshold Voltage
–20
Reset Override Voltage (Note 7)
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
CONDITIONS
I
I
I
I
I
C
Override V
SOURCE
SINK
SINK
SINK
SINK
WT
A
– 60
V
vs Temperature
= 25°C. V
= 1500pF Deviation from t
= 2.5mA, V
= 100µA, V
= 100µA, V
= 100µA, V
CC3
–40
= 1µA
The
Threshold Voltage
CC5
– 20
Ability to Assert RST
●
CC3
TEMPERATURE (°C)
CC3
CC3
CC3
CC5
denotes specifications which apply over the full operating
0
= 3.3V, V
/V
= 1V, V
= 0V, V
= 1V, V
CC25
Note 4: Both V
which pin has the greatest potential.
Note 5: Timing measured with respect to RST passing through 1.5V.
Note 6: The output pin RST has a weak internal pull-up to V
6µA. However, external pull-up resistors may be used when faster rise
times are required or for V
Note 7: The V
than approximately 4.15V. Above this point the override is turned off and
the V
20
= 0V
CC5
CC5
CC5
CC5
40
CC5
WT
/V
/V
/V
pin functions normally.
60
CC25
CC25
CC25
= 33ms (Note 5)
= 5V, V
CC5
CC3
80
= 0V
= 1V
= 1V
1726 G02
reset override voltage is valid for an operating range less
and V
100
CC25
CC25
= 2.5V, V
OH
/V
1.015
1.010
1.005
1.000
0.995
0.990
0.985
●
●
●
●
●
●
●
●
●
●
voltages greater than V
CC5
–60
0.3 • V
can act as the supply depending on
V
vs Temperature
V
CC3
CCA
CCA
MIN
–30
40
–40 –20
– 1
Threshold Voltage
CC3
= V
V
CC3
CC3
TEMPERATURE (°C)
0.15
0.05
0.05
0.05
TYP
±0.025
0
0
unless
CC3
20
LTC1726
0.7 • V
.
MAX
40
0.4
0.3
0.3
0.3
±1
30
CC3
CC3
of typically
60
UNITS
80
1726 G03
1726fb
3
µA
ns
100
%
V
V
V
V
V
V
V
V