MAX6381-MAX6390| Datasheet

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19-1839; Rev 4; 4/07

SC70/uDFN, Single/Dual Low-Voltage, Low-Power uP Reset Circuits
General Description
The MAX6381 MAX6390 microprocessor (uP) supervisory circuits monitor power-supply voltages from +1.8V to +5.0V while consuming only 3uA 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 a manual reset input with a longer VCC reset timeout period (1120ms or 1200
ms) and a shorter manual reset timeout (140ms or 150ms). The MAX6381/MAX6382/MAX6383 are available in 3-pin SC70 and 6-pin uDFN packages and the MAX6384 MAX6390 are available in 4-pin SC70 and 6-pin uDFN packages.

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 6uA at +3.6V and 3uA at +1.8V Pin Compatible with MAX809/MAX810/MAX803/MAX6326/MAX6327/ MAX6328/MAX6346/MAX6347/MAX6348, and MAX6711/MAX6712/MAX6713 Tiny 3-Pin/4-Pin SC70 and 6-Pin uDFN Packages

MAX6381 MAX6390

Applications
Computers Controllers Intelligent Instruments Critical uP and uC Power Monitoring Portable/BatteryPowered Equipment Dual Voltage Systems

Ordering Information
PART TEMP RANGE PINPACKAGE 6 uDFN-6 3 SC70-3 6 uDFN-6 3 SC70-3 PKG CODE L611-1 X3-2 L611-1 X3-2

Pin Configurations
TOP VIEW
GND 6 GND 1 N.C. 5 VCC 4

MAX6381LT_ _D_+T -40 C to +125 C MAX6381XR_ _D_+T -40 C to +125 C MAX6382LT_ _D_+T -40 C to +125 C MAX6382XR_ _D_+T -40 C to +125 C

RESET (RESET) 2

MAX6381 MAX6382 MAX6383

3

VCC

MAX6381 MAX6382 MAX6383
1 RESET (RESET) 2 N.C. 3 N.C

SC70 ( ) IS FOR MAX6382

Note: Insert reset threshold suffix (see Reset Threshold table) after "XR", "XS", or "LT." Insert reset timeout delay (see Reset Timeout Delay table) after "D" to complete the part number. Sample stock is generally held on standard versions only (see Standard Versions table). Standard versions have an order increment requirement of 2500 pieces. Nonstandard versions have an order increment requirement of 10,000 pieces. Contact factory for availability of nonstandard versions. +Denotes a lead-free package. Ordering Information continued at end of data sheet. Typical Operating Circuit appears at end of data sheet. Selector Guide appears at end of data sheet. 1

uDFN

Pin Configurations continued at end of data sheet.

________________________________________________________________ Maxim Integrated Products

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com.

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MAX6381-MAX6390 DATASHEET