Nanopower µP Supervisory Circuits with
Manual Reset and Watchdog Timer
ABSOLUTE MAXIMUM RATINGS
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature .....................................................+150°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
V
, Open-Drain RESET to GND ..........................-0.3V to +6.0V
CC
MR, Push-Pull RESET, RESET,
WDI, CT, I.C............................................-0.3V to (V
Input Current, Output Current (all pins)............................ 20mA
+ 0.3V)
CC
Continuous Power Dissipation (T = +70°C)
A
5-Pin SOT23 (derate 7.1mW/°C above +70°C)............571mW
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(V
= 1.2V to 5.5V, T = -40°C to +85°C, unless otherwise specified. Typical values are at V
= 2.5V, T = +25°C.) (Note 1)
CC A
CC
A
PARAMETER
SYMBOL
CONDITIONS
MIN
1.1
TYP
MAX
5.5
UNITS
T
T
≥ 0°C
A
Supply Voltage
Supply Current
V
V
CC
= -40°C to +85°C
1.2
5.5
A
V
V
V
= 5.0V
= 3.3V
= 1.8V
210
190
170
7
400
380
370
15
CC
CC
CC
V
> V , no load,
CC
TH
nA
reset output
I
CC
deasserted (Note 2)
V
V
< V , no load, reset output asserted
TH
µA
V
CC
CC
V
-
V
+
TH
TH
V
Reset Threshold
V
falling (see Table 2)
V
TH
CC
TH
2.5%
2.5%
Reset Threshold Hysteresis
V
Reset asserted to reset deasserted
0.5
15
%V
TH
HYST
D1
D2
10
40
25
80
60
D3
D4
D5
D6
150
1200
300
600
225
1800
450
900
300
2400
600
1200
V
= V + 150mV
TH
CC
Reset Timeout Period
t
ms
RP
(Figures 2 and 3)
V
falling from (V + 100mV) to
TH
CC
V
to Reset Delay
t
40
µs
CC
RD
(V - 100mV) at 10mV/µs
TH
V
≥ 1.1V, I
= 50µA,
A
CC
SINK
0.3
0.3
0.3
RESET asserted, T ≥ 0°C
V
≥ 1.2V, I
= 100µA,
CC
SINK
V
OL
RESET asserted
V
≥ 2.12V, I
= 1.2mA,
SINK
CC
RESET Output Voltage
V
RESET asserted
V
≥ 1.71V, I
= 200µA,
SOURCE
CC
0.8 x V
0.8 x V
CC
CC
RESET deasserted, push-pull RESET only
V
OH
V
≥ 2.38V, I = 500µA,
CC
SOURCE
RESET deasserted, push-pull RESET only
Open-Drain RESET Leakage
Current
I
RESET deasserted
25
nA
LKG
2
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