MAX6340/MAX6421–MAX6426
Low-Power, SC70/SOT P Reset Circuits with
Capacitor-Adjustable Reset Timeout Delay
2
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ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(VCC = 1V to 5.5V, TA = TMIN to TMAX, unless otherwise specified. Typical values are at VCC = 5V and TA = +25°C.) (Note 1)
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.
All Voltages Referenced to GND
VCC ........................................................................-0.3V to +6.0V
SRT, RESET, RESET (push-pull).................-0.3V to (VCC + 0.3V)
RESET (open drain)...............................................-0.3V to +6.0V
Input Current (all pins)......................................................±20mA
Output Current (RESET, RESET) ......................................±20mA
Continuous Power Dissipation (TA = +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
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Supply Voltage Range
VCC
1.0
5.5
V
VCC
≤ 5.0V
2.5
4.2
VCC
≤ 3.3V
1.9
3.4
Supply Current
ICC
VCC
≤ 2.0V
1.6
2.5
A
TA = +25°C
VTH - 1.5%
VTH + 1.5%
VCC Reset Threshold Accuracy
VTH
TA = -40°C to +125°C
VTH - 2.5%
VTH + 2.5%
V
Hysteresis
VHYST
4 x VTH
mV
VCC to Reset Delay
tRD
VCC falling at 1mV/s
80
s
CSRT = 1500pF
3.00
4.375
5.75
Reset Timeout Period
tRP
CSRT = 0
0.275
ms
VSRT Ramp Current
IRAMP
VSRT = 0 to 0.65V; VCC = 1.6V to 5V
240
nA
VSRT Ramp Threshold
VTH-RAMP
VCC = 1.6V to 5V (VRAMP rising)
0.65
V
RAMP Threshold Hysteresis
VRAMP falling threshold
33
mV
VCC
≥ 1.0V, ISINK = 50A
0.3
VCC
≥ 2.7V, ISINK = 1.2mA
0.3
RESET Output Voltage Low
VOL
VCC
≥ 4.5V, ISINK = 3.2mA
0.4
V
VCC
≥ 1.8V, ISOURCE = 200A
0.8 x VCC
VCC
≥ 2.25V, ISOURCE = 500A
0.8 x VCC
RESET Output Voltage High,
Push-Pull
VOH
VCC
≥ 4.5V, ISOURCE = 800A
0.8 x VCC
V
RESET Output Leakage Current,
Open-Drain
ILKG
VCC > VTH, reset not asserted
1.0
A
VCC
≥ 1.0V, ISOURCE = 1A
0.8 x VCC
VCC
≥ 1.8V, ISOURCE = 150A
0.8 x VCC
VCC
≥ 2.7V, ISOURCE = 500A
0.8 x VCC
RESET Output Voltage High
VOH
VCC
≥ 4.5V, ISOURCE = 800A
0.8 x VCC
V
VCC
≥ 1.8V, ISINK = 500A
0.3
VCC
≥ 2.7V, ISINK = 1.2mA
0.3
RESET Output Voltage Low
VOL
VCC
≥ 4.5V, ISINK = 3.2mA
0.4
V
Note 1: Devices production tested at +25°C. Overtemperature limits are guaranteed by design.