MAX6457–MAX6460
High-Voltage, Low-Current Voltage Monitors in
SOT Packages
6
Maxim Integrated
Pin Description
PIN
MAX6457 MAX6458 MAX6459 MAX6460
NAME FUNCTION
MAX6457: Open-Drain Monitor Output. OUT requires an external pullup
resistor. OUT asserts low for V
CC
between 1.5V and 4V. OUT asserts low
when V
IN+
drops below V
TH-
and goes high after the timeout period (t
TP
)
when V
IN+
exceeds V
TH+
.
MAX6458: Open-Drain Monitor Output. OUT requires an external pullup
resistor. OUT asserts low for V
CC
between 1.5V and 4V. OUT asserts low
when V
IN+
drops below V
TH-
or when V
IN-
exceeds V
TH+
. OUT goes
high after the timeout period (t
TP
) when V
IN+
exceeds V
TH+
and V
IN-
drops below V
TH-
.
1 1 — 1 OUT
MAX6460: Open-Drain Monitor Output. OUT requires an external pullup
resistor. OUT asserts low for V
CC
between 1.5V and 4V. OUT asserts low
when V
IN+
drops below V
IN-
. OUT goes high when V
IN+
is above V
IN-
.
— — 1 — OUTA
Open-Drain Monitor A Undervoltage Output. OUTA requires an external
pullup resistor. OUTA goes low when V
IN+
drops below V
TH-
and goes
high when V
IN+
exceeds V
TH+
. OUTA also goes low for V
CC
between
1.5V and 4V.
— — 5 — OUTB
Open-Drain Monitor B Overvoltage Output. OUTB requires an external
pullup resistor. OUTB goes low when V
IN-
exceeds V
TH+
and goes high
when V
IN-
drops below V
TH-
. OUTB also goes low when V
CC
drops
below 4V.
2 2 2 2 GND Ground
3333IN+
Adjustable Undervoltage Monitor Threshold Input. Noninverting input for
MAX6460.
— 4 4 4 IN-
Adjustable Overvoltage Monitor Threshold Input. Inverting input for
MAX6460.
4———CLEAR
Clear Input. For V
IN+
> V
TH+
, drive CLEAR high to latch OUT high.
Connect CLEAR to GND to make the latch transparent. CLEAR must be
low when powering up the device. Connect CLEAR to GND when not
used.
— — — 5 REF
Reference. Internal 2.25V reference output. Connect REF to IN+ through
a voltage divider for active-low output. Connect REF to IN- through a
voltage divider for active-high output. REF can source up to 100µA and
sink up to 300nA. Leave REF floating when not used. REF output is
stable with capacitive loads from 0 to 50pF or greater than 1µF.
5566V
CC
Supply Voltage
