Datasheet
All Voltages Referenced to GND
V
CC
.......................................................................-0.3V to +6.0V
SRT, RESET, RESET (push-pull) ............. -0.3V to (V
CC
+ 0.3V)
RESET (open drain) .............................................-0.3V to +6.0V
Input Current (all pins) ......................................................±20mA
Output Current (RESET, RESET) ....................................±20mA
Continuous Power Dissipation (T
A
= +70°C)
4-Pin SC70 (derate 3.1mW/°C above +70°C) .............245mW
4-Pin SOT143 (derate 4mW/°C above +70°C) ...........320mW
5-Pin SOT23 (derate 7.1mW/°C above +70°C) ..........571mW
Operating Temperature Range ......................... -40°C to +125°C
Storage Temperature Range ........................... .-65°C to +150°C
Junction Temperature ...................................................... +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Note 1: Devices production tested at +25°C. Overtemperature limits are guaranteed by design.
(V
CC
= 1V to 5.5V, T
A
= T
MIN
to T
MAX
, unless otherwise specified. Typical values are at V
CC
= 5V and T
A
= +25°C.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Supply Voltage Range V
CC
1.0 5.5 V
Supply Current I
CC
V
CC
≤ 5.0V 2.5 4.2
µA
V
CC
≤ 3.3V 1.9 3.4
VCC ≤ 2.0V 1.6 2.5
V
CC
Reset Threshold Accuracy V
TH
T
A
= +25°C V
TH
- 1.5% V
TH
+ 1.5%
V
T
A
= -40°C to +125°C V
TH
- 2.5% V
TH
+ 2.5%
Hysteresis V
HYST
4 x V
TH
mV
V
CC
to Reset Delay t
RD
V
CC
falling at 1mV/µs 80 µs
Reset Timeout Period t
RP
C
SRT
= 1500pF 3.00 4.375 5.75
ms
C
SRT
= 0 0.275
V
SRT
Ramp Current I
RAMP
V
SRT
= 0 to 0.65V; V
CC
= 1.6V to 5V 240 nA
V
SRT
Ramp Threshold
V
TH-RAMP
V
CC
= 1.6V to 5V (V
RAMP
rising) 0.65 V
RAMP Threshold Hysteresis V
RAMP
falling threshold 33 mV
RESET Output Voltage Low V
OL
V
CC
≥ 1.0V, I
SINK
= 50µA 0.3
VV
CC
≥ 2.7V, I
SINK
= 1.2mA 0.3
V
CC
≥ 4.5V, I
SINK
= 3.2mA 0.4
RESET Output Voltage High,
Push-Pull
V
OH
V
CC
≥ 1.8V, I
SOURCE
= 200µA 0.8 x V
CC
VV
CC
≥ 2.25V, I
SOURCE
= 500µA 0.8 x V
CC
V
CC
≥ 4.5V, I
SOURCE
= 800µA 0.8 x V
CC
RESET Output Leakage Current,
Open-Drain
I
LKG
V
CC
> V
TH
, reset not asserted 1.0 µA
RESET Output Voltage High V
OH
V
CC
≥ 1.0V, I
SOURCE
= 1µA 0.8 x V
CC
V
V
CC
≥ 1.8V, I
SOURCE
= 150µA 0.8 x V
CC
V
CC
≥ 2.7V, I
SOURCE
= 500µA 0.8 x V
CC
V
CC
≥ 4.5V, I
SOURCE
= 800µA 0.8 x V
CC
RESET Output Voltage Low V
OL
V
CC
≥ 1.8V, I
SINK
= 500µA 0.3
VV
CC
≥ 2.7V, I
SINK
= 1.2mA 0.3
V
CC
≥ 4.5V, I
SINK
= 3.2mA 0.4
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Maxim Integrated
│
2
MAX6340/MAX6421–
MAX6426
Low-Power, SC70/SOT µP Reset Circuits
with Capacitor-Adjustable Reset Timeout Delay
Electrical Characteristics
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.
Absolute Maximum Ratings