General Description
The MAX6895–MAX6898 is a family of small, low-power,
voltage-monitoring circuits with sequencing capability.
These miniature devices offer tremendous flexibility with
an adjustable threshold capable of monitoring down to
0.5V and an external capacitor-adjustable time delay.
These devices are ideal for use in power-supply
sequencing, reset sequencing, and power-switching
applications. Multiple devices can be cascaded for
complex sequencing applications.
A high-impedance input with a 0.5V threshold allows an
external resistive divider to set the monitored threshold.
The output asserts (OUT = high or OUT = low) when
the input voltage rises above the 0.5V threshold and the
enable input is asserted (ENABLE = high or ENABLE =
low). When the voltage at the input falls below 0.5V or
when the enable input is deasserted (ENABLE = low or
ENABLE = high), the output deasserts (OUT = low or
OUT = high). All devices provide a capacitor-program-
mable delay time from when the input rises above 0.5V
to when the output is asserted. The MAX689_A versions
provide the same capacitor-adjustable delay from when
enable is asserted to when the output asserts. The
MAX689_P devices have a 1µs propagation delay from
when enable is asserted to when the output asserts.
The MAX6895A/P offers an active-high enable input
and an active-high push-pull output. The MAX6896A/P
offers an active-low enable input and an active-low
push-pull output. The MAX6897A/P offers an active-
high enable input and an active-high open-drain output.
Finally, the MAX6898A/P offers an active-low enable
input and an active-low open-drain output.
All devices operate from a 1.5V to 5.5V supply voltage
and are fully specified over the 0°C to +125°C operat-
ing temperature range. Each device is available in an
ultra-small 6-pin µDFN (1.0mm x 1.5mm) package.
Applications
Automotive Computers/Servers
Medical Equipment Critical µP Monitoring
Intelligent Instruments Set-Top Boxes
Portable Equipment Telecom
Features
♦1.75% Accurate Adjustable Threshold Over
Temperature
♦Operate from VCC of 1.5V to 5.5V
♦Capacitor-Adjustable Delay
♦Active-High/-Low Enable Input Options
♦Active-High/-Low Output Options
♦Open-Drain (28V Tolerant)/Push-Pull Output
Options
♦Low Supply Current (10µA, typ)
♦Fully Specified from 0°C to +125°C
♦Ultra-Small 6-Pin µDFN Package (1.5mm x 1.0mm
x 0.8mm)
MAX6895–MAX6898
Ultra-Small, Adjustable
Sequencing/Supervisory Circuits
________________________________________________________________ Maxim Integrated Products 1