Datasheet

MAX6700/MAX6710
Low-Voltage, High-Accuracy, Triple/Quad
Voltage µP Supervisory Circuits in SOT Package
6
Maxim Integrated
Applications Information
Reset Output
The MAX6700 RESET output asserts low when any
monitored IN_ voltage drops below its specified reset
threshold and remains low for the propagation delay
(5µs) after all inputs exceed their thresholds (Figure 3).
The MAX6710 provides an extended reset timeout peri-
od of 140ms (min). The output is open drain with a
weak internal pullup to the monitored IN2 or V
CC
supply
(10µA typ). For many applications no external pullup
resistor is required to interface with other logic devices.
An external pullup resistor to any voltage from 0 to 5.5V
can overdrive the internal pullup if interfacing to differ-
ent logic-supply voltages (Figure 4). Internal circuitry
prevents reverse current flow from the external pullup
voltage to IN2.
IN1
(ADJ)
IN2, V
CC
(3.3V/3V)
IN3
(2.5V/1.8V)
IN4
(ADJ)
0.62V
REFERENCE
NOR
GATE
TIME-
OUT
(200ms)
IN2, V
CC
RESET
MAX6710
ALL DEVICES ARE POWERED FROM IN2, V
CC
(3.0V/3.3V). RESET IS VALID IF V
IN1
OR V
IN2
IS GREATER THAN 1V, OR IF V
CC
IS GREATER THAN 2V (MAX6710Q ONLY)
UVLO
Figure 2. MAX6710 Functional Diagram