Dual-Voltage µP Supervisory Circuits
with Sequenced Reset Outputs
ABSOLUTE MAXIMUM RATINGS
VCC to GND ...........................................................-0.3V to +6.0V
RESET1 (MAX6392), RESET IN2, CSRT,
MR to GND ..............................................-0.3V to (VCC + 0.3V)
RESET1 (MAX6391), RESET2, R1, R2 to GND......-0.3V to +6.0V
Input Current (VCC, GND, CSRT, R1, R2, MR) .................±20mA
Output Current (RESET1, RESET2) ..................................±20mA
Continuous Power Dissipation (TA = +70°C)
8-Pin SOT23 (derate 5.26mW/°C above +70°C)...........421mW
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
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
(VCC = 1.2V to 5.5V, TA = TMIN to TMAX, unless otherwise specified. Typical values are at VCC = +5V and TA = +25°C.) (Note 1)
PARAMETER
VCC Range
Supply Current
VCC Reset Threshold
RESET IN2 Threshold
RESET IN2 Input Current
VCC to RESET1 Delay
VCC or RESET IN2 to RESET2
Delay
SYMBOL
CONDITIONS
TA = 0°C to +85°C
TA = -40°C to +85°C
ICC No load
MAX639_UA46
MAX639_UA44
MAX639_UA31
MAX639_UA29
VTH1
MAX639_UA26
MAX639_UA23
MAX639_UA22
MAX639_UA17
MAX639_UA16
VTH2 VCC = 5V
tRD1
tRD2
VCC falling at 1mV/µs (Note 2)
MIN TYP MAX UNITS
1.0
5.5
V
1.2
5.5
15
25
µA
4.50 4.63 4.75
4.25 4.38 4.50
3.00 3.08 3.15
2.85 2.93 3.00
2.55 2.63 2.70
V
2.25 2.32 2.38
2.12 2.19 2.25
1.62 1.67 1.71
1.54 1.58 1.61
610 625 640
mV
50
nA
20
µs
10
2 _______________________________________________________________________________________