MAX6381MAX6390

Features:

Factory-Set Reset Threshold Voltages Ranging from +1.58V to +4.63V in Approximately 100mV Increments
±2.5% Reset Threshold Accuracy Over Temperature (-40°C to +125°C)
Seven Reset Timeout Periods Available: 1ms, 20ms, 140ms, 280ms, 560ms, 1120ms,  1200ms (min)
3 Reset Output Options
            Active-Low Push-Pull
            Active-High Push-Pull
            Active-Low Open-Drain
Reset Output State Guaranteed Valid  Down to VCC = 1V
Manual Reset Input (MAX6384/MAX6385/MAX6386)
Auxiliary RESET IN (MAX6387/MAX6388/MAX6389)
VCC Reset Timeout (1120ms or 1200ms)/Manual Reset Timeout (140ms or 150ms) (MAX6390)
Negative-Going VCC Transient Immunity
Low Power Consumption of 6A at +3.6V  and 3A at +1.8V
Pin Compatible with MAX809/MAX810/MAX803/MAX6326/MAX6327/ MAX6328/MAX6346/MAX6347/MAX6348,  and MAX6711/MAX6712/MAX6713
Tiny 3-Pin SC70 and 4-Pin SC70 Packages


Application

Computer Controllers Intelligent Instruments Critical P and C Power Monitoring Portable/Battery-Powered Equipment Dual Voltage Systems


Pinout




Specifications

VCC  to GND.............................................................-0.3V to +6.0V
RESET Open-Drain Output........................................-0.3V to +6.0V
RESET, RESET (Push-Pull Output)..................-0.3V to (VCC + 0.3V)
MR, RESET IN.................................................-0.3V to (VCC + 0.3V)
Input Current (VCC)...............................................................20mA
Output Current (All Pins)........................................................20mA
Continuous Power Dissipation (TA = +70°C)
3-Pin SC70 (derate 2.9mW/°C above +70°C)...................235mW
4-Pin SC70 (derate 3.1mW/°C above +70°C)...................245mW
Operating Temperature Range .........................-40°C to +125°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10s)...................................+300°C


Description

The MAX6381MAX6390 microprocessor (P) supervisory circuits monitor power supply voltages from +1.8V to +5.0V while consuming only 3A of supply current at +1.8V. Whenever VCC falls below the factory-set reset thresholds, the reset output asserts and remains asserted for a minimum reset timeout period after VCC rises above the reset threshold. Reset thresholds are available from +1.58V to +4.63V, in approximately 100mV increments. Seven minimum reset timeout delays ranging from 1ms to 1200ms are available.

The MAX6381/MAX6384/MAX6387 have a push-pull active-low reset output. The MAX6382/MAX6385/ MAX6388 have a push-pull active-high reset output, and the MAX6383/MAX6386/MAX6389/MAX6390 have an open-drain active-low reset output. The MAX6384/MAX6385/MAX6386 also feature a debounced manual reset input (with internal pullup resistor). The MAX6387/MAX6388/MAX6389 have an auxiliary input for monitoring a second voltage. The MAX6390 offers amanual reset input with a longer VCC reset timeout period (1120ms or 1200ms) and a shorter manual reset timeout (140ms or 150ms).

The MAX6381/MAX6382/MAX6383 are available in 3-pin SC70 packages and the MAX6384MAX6390 are avail- able in 4-pin SC70 packages.