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Part: MAX6390
Category:
Power Management
-> Supervisory Circuits
-> Microprocessor Supervisors
Description: SC70, Single/dual Low-Voltage, Low-power P Reset Circuits
Company: Maxim Integrated Products
Datasheet: Download MAX6390 datasheet File size : 299 kB
Request For quote: Find where to buy MAX6390
Datasheet text preview:
19-1839; Rev 1; 04/01
SC70, Single/Dual Low-Voltage, Low-Power µP Reset Circuits
General Description
The MAX6381MAX6390 microprocessor (µP) supervisory circuits monitor power supply voltages from +1.8V to +5.0V while consuming only 3µA 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. T h e MAX6381/MAX6384/MAX6387 have a push-pull a c t i v e - l o w reset output. The MAX6382/MAX6385/ MAX6388 have a push-pull active-high reset output, a n d the MAX6383/MAX6386/MAX6389/MAX6390 have an open-drain active-low reset output. The M A X 6 3 8 4 / M A X 6 3 8 5 / M A X 6 3 8 6 also feature a d e b o u n c e d 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 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 available in 4-pin SC70 packages.
Features
o Factory-Set Reset Threshold Voltages Ranging from +1.58V to +4.63V in Approximately 100mV Increments o ±2.5% Reset Threshold Accuracy Over Temperature (-40°C to +125°C) o Seven Reset Timeout Periods Available: 1ms, 20ms, 140ms, 280ms, 560ms, 1120ms, 1200ms (min) o 3 Reset Output Options Active-Low Push-Pull Active-High Push-Pull Active-Low Open-Drain o Reset Output State Guaranteed Valid Down to VCC = 1V o Manual Reset Input (MAX6384/MAX6385/MAX6386) o Auxiliary RESET IN (MAX6387/MAX6388/MAX6389) o VCC Reset Timeout (1120ms or 1200ms)/Manual Reset Timeout (140ms or 150ms) (MAX6390) o Negative-Going VCC Transient Immunity o Low Power Consumption of 6µA at +3.6V and 3µA at +1.8V o Pin Compatible with MAX809/MAX810/MAX803/MAX6326/MAX6327/ MAX6328/MAX6346/MAX6347/MAX6348, and MAX6711/MAX6712/MAX6713 o Tiny 3-Pin SC70 and 4-Pin SC70 Packages
MAX6381MAX6390
________________________Applications
Computers Controllers Intelligent Instruments Critical µP and µC Power Monitoring Portable/Battery-Powered Equipment Dual Voltage Systems
Ordering Information
PART MAX6381XR_ _D_-T TEMP. RANGE -40°C to +125°C -40°C to +125°C -40°C to +125°C PIN-PACKAGE 3 SC70-3 3 SC70-3 3 SC70-3
Pin Configurations
TOP VIEW
GND 1
MAX6382XR_ _D_-T MAX6383XR_ _D_-T
RESET (RESET) 2
MAX6381 MAX6382 MAX6383
3
VCC
Note: Insert reset threshold suffix (see Reset Threshold table) after "XR" or "XS". 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. *MAX6390 is available with D4 or D7 timing only. 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
SC70 ( ) IS FOR MAX6382 Pin Configurations continued at end of data sheet.
________________________________________________________________ Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com.
SC70, Single/Dual Low-Voltage, Low-Power µP Reset Circuits MAX6381MAX6390
ABSOLUTE MAXIMUM RATINGS
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
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(VCC = full range, TA = -40°C to +125°C, unless otherwise specified. Typical values are at TA = +25°C.) (Note 1)
PARAMETER Operating Voltage Range SYMBOL VCC VCC = 5.5V, no load VCC Supply Current ICC VCC = 3.6V, no load VCC = 2.5V, no load VCC = 1.8V, no load VCC Reset Threshold (See Reset Thresholds table) Reset Threshold Tempco VCC to Reset Delay TA = +25°C VTH TA = -40°C to +125°C VTH/°C VCC falling at 10mV/µs from VTH + 100mV to VTH - 100mV D1 D2 Reset Timeout Period MAX6381MAX6389 (See Reset Timeout table) D3 tRP D5 D6 D4 D7 MR timeout period Reset Timeout Period MAX6390 tRP VCC timeout period VIL VTH 4V 0.7 VCC 0.8 2.4 D4 D7 D4 D7 1 20 140 280 560 1120 1200 140 150 1120 1200 VTH 1.5% VTH 2.5% CONDITIONS MIN 1.0 7 6 4 3 VTH VTH 60 35 2 40 280 560 1120 2240 2400 280 300 2240 2400 0.3 VCC V ms ms TYP MAX 5.5 13 11 7 6 VTH + 1.5% V VTH + 2.5% ppm/°C µs µA UNITS V
2
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SC70, Single/Dual Low-Voltage, Low-Power µP Reset Circuits
ELECTRICAL CHARACTERISTICS (continued)
(VCC = full range, TA = -40°C to +125°C, unless otherwise specified. Typical values are at TA = +25°C.) (Note 1)
PARAMETER MR Minimum Input Pulse Width MR Glitch Rejection MR to Reset Delay MR Internal Pullup Resistance MAX6381MAX6389 MAX6390 TA = +25°C Reset IN Input Threshold V THRST TA = 0°C to +85°C TA = -40°C to +125°C RESET IN to RESET Delay RESET IN Input Leakage Current Open-Drain RESET Output Voltage Open-Drain RESET Output Leakage Current IRESET IN VCC 4.5V, ISINK = 3.2mA, reset asserted VOL VCC 2.5V, ISINK = 1.2mA, reset asserted VCC 1.0V, ISINK = 80µA, reset asserted ILKG VCC > VTH, RESET not asserted VCC 4.5V, ISINK = 3.2mA, reset asserted VOL Push-Pull RESET Output Voltage VOH VCC 2.5V, ISINK = 1.2mA, reset asserted VCC 1.0V, ISINK = 80µA, reset asserted VCC 4.5V, ISOURCE = 800µA, reset not asserted VCC 2.5V, ISOURCE = 500µA, reset not asserted VCC 4.5V, ISOURCE = 800µA, reset asserted VCC 2.5V, ISOURCE = 500µA, reset asserted VOH VCC 1.8V, ISOURCE = 150µA, reset asserted Push-Pull RESET Output Voltage VCC 1.0V, ISOURCE = 1µA, reset asserted VCC 4.5V, ISINK = 3.2mA, reset not asserted VOL VCC 2.5V, ISINK = 1.2mA, reset not asserted 0.8 VCC 0.8 VCC 0.8 VCC 0.8 VCC 0.8 VCC 0.8 VCC 0.4 0.3 VRESETIN falling at 4mV/µs from VTHRST + 40mV to VTHRST - 40mV -50 32 800 1.245 1.232 1.219 4.5 ±1 +50 0.4 0.3 0.3 1.0 0.4 0.3 0.3 V µA V SYMBOL CONDITIONS MIN 1 100 200 63 1350 1.27 100 2300 1.295 1.308 1.321 µs nA V TYP MAX UNITS µs ns ns k
MAX6381MAX6390
V
Note 1: Specifications over temperature are guaranteed by design, not production tested.
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