MAX6459UTC Datasheet, PDF (6/15 Pages) Maxim Integrated Products – High-Voltage, Low-Current Voltage Monitors in SOT Packages

MAX6457–MAX6460
High-Voltage, Low-Current Voltage Monitors in
SOT Packages
Pin Description
PIN
NAME
MAX6457 MAX6458 MAX6459 MAX6460
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
1
1
—
1
OUT ^{resistor. OUT asserts low for VCC 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-.
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-.
Open-Drain Monitor A Undervoltage Output. OUTA requires an external
—
—
1
—
OUTA
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.
Open-Drain Monitor B Overvoltage Output. OUTB requires an external
—
—
5
—
OUTB
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
3
3
3
3
IN+ ^{Adjustable Undervoltage Monitor Threshold Input. Noninverting input for}
MAX6460.
—
4
4
4
IN- ^{Adjustable Overvoltage Monitor Threshold Input. Inverting input for}
MAX6460.
Clear Input. For V_IN+ > V_TH+, drive CLEAR high to latch OUT high.
4
—
—
—
CLEAR
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
5
6
Reference. Internal 2.25V reference output. Connect REF to IN+ through
a voltage divider for active-low output. Connect REF to IN- through a
5
REF 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.
6
V_CC Supply Voltage
6
Maxim Integrated