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MAX6464：Ultra-Low-Power Voltage Detectors and µP Supervisory Circuits

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- x 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 active-high 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.

Key Features Ultra-Low 1.0µA Supply Current Preset Thresholds from +1.6V to +5.5V in 100mV Increments Internal 5% Threshold Hysteresis ±2.5% Threshold Accuracy Over Temperature Internal Timeout Period Option (150ms min) Immune to Short Voltage Transients No External Components Available in Three Output Options: Push-Pull (Active Low/Active High) and Open Drain (Active Low) Fully Specified from -40°C to +125°C Small SC70 and SOT23 Packages

MAX6461, MAX6462, MAX6463, MAX6464, MAX6465, MAX6466: Functional Diagram Applications/Uses Cell Phones Cordless Phones Load Switching/Power Sequencing Noise-Immune µP Reset Circuits PDAs Portable Battery-Powered Equipment Portable Medical Devices Power-Supply Monitoring in Digital/Analog Systems Precision Battery Monitoring

DataSheet

Parametrics

Quality and Environmental Data

• MAX6464.pdf

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