Ultra-Low-Power Voltage Detectors and uP Supervisory Circuits - Maxim
Description
19-2533; Rev 1; 1/03
Ultra-Low-Power Voltage Detectors and µP Supervisory Circuits
General Description
The MAX6461–MAX6466 family of ultra-low-power voltage detectors and µP reset supervisory circuits monitors battery, power-supply, and system voltages.
Each circuit includes a precision bandgap reference, a comparator, internally trimmed resistor networks that set specified trip thresholds, and an internal 5% threshold hysteresis circuit (see the Functional Diagram).
Output is asserted when VCC falls below the internal VTH- and remains asserted until VCC rises above VTH+ (VTH+ = VTH- × 1.
05).
These devices provide excellent circuit reliability and low cost by eliminating external components and adjustments when monitoring nominal system voltages from +1.
6V to +5.
5V.
The MAX6461/MAX6462/MAX6463 are voltage detectors with a propagation delay of 17µs.
The MAX6464/MAX6465/MAX6466 are µP supervisory circuits with a minimum reset timeout period of 150ms.
All devices are available with thresholds from +1.
6V to +5.
5V in 100mV increments.
The family is available with three output stage options: push-pull with active-low output, push-pull with activehigh output, and open drain with active-low output.
These devices are available in SC70 and SOT23 packages specified over the -40°C to +125°C temperature range.
o Ultra-Low 1.
0µA Supply Current o Preset Thresholds from +1.
6V to +5.
5V in 100mV Increments o Internal 5% Threshold Hysteresis o ±2.
5% Threshold Accuracy Over Temperature o Internal Timeout Period Option (150ms min) o Immune to Short Voltage Transients o No External Components o Available in Three Output Options: Push-Pull (Active Low/Active High) and Open Drain (Active Low) o Fully Specified from -40°C to +125°C o Small SC70 and SOT23 Packages
Features
MAX6461–MAX6466
Ordering Information
PART MAX6461XR_ _-T MAX6461UR_ _-T MAX6461UK_ _-T MAX6462XR_ _-T MAX6462UR_ _-T MAX6462UK_ _-T TEMP RANGE -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +1...
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