MAX6348UR44-T资料

3-Pin, Ultra-Low-Power SC70/SOT

µP Reset Circuits

General Description

Features

The MAX6326/MAX6327/MAX6328/MAX6346/MAX6347/MAX6348 microprocessor (µP) supervisory circuits moni-♦Ultra-Low 1µA (max) Supply Current(MAX6326/MAX6327/MAX6328)

tor the power supplies in µP and digital systems. Thesedevices provide excellent circuit reliability and low cost♦Precision Monitoring of 2.5V, 3V, 3.3V, and 5Vby eliminating external components and adjustmentsPower-Supply Voltages

when used with 2.5V, 3V, 3.3V, and 5V powered circuits.♦Reset Thresholds Available from 2.2V to 4.63VThese circuits perform a single function: they assert a♦Fully Specified Over Temperature

reset signal whenever the VCCsupply voltage declinesbelow a preset threshold, keeping it asserted for at least♦100ms (min) Power-On Reset Pulse Width100ms after VCChas risen above the reset threshold.♦Low Cost

The only difference between the devices is their output.♦Available in Three Versions: Push-Pull The MAX6326/MAX6346 (push-pull) and MAX6328/Push-Pull RESET, and Open-Drain RESETRESET,MAX6348 (open-drain) have an active-low reset output.The MAX6327/MAX6347 have an active-high push-pull♦Power-Supply Transient Immunityreset output. All of these parts are guaranteed to be in♦No External Componentsthe correct state for VCCdown to 1V. The reset compara-♦3-Pin SC70/SOT23 Packages

tor is designed to ignore fast transients on VCC. Resetthresholds are factory-trimmable between 2.2V and♦Pin Compatible with MAX803/MAX809/MAX810

4.63V, in approximately 100mV increments. Twenty-onestandard versions are available. Contact the factory forOrdering Informationavailability of nonstandard versions.

PART†TEMP. RANGEPIN-PACKAGEUltra-low supply currents (1µA max for the MAX6326/MAX6326XR_ _-T-40°C to +85°C3 SC70-3MAX6327/MAX6328) make these parts ideal for use inportable equipment. All six devices are available inMAX6326UR_ _-T-40°C to +85°C3 SOT23-3space-saving SOT23 and SC70 packages.

MAX6327XR_ _-T-40°C to +85°C3 SC70-3MAX6327UR_ _-T-40°C to +85°C3 SOT23-3Applications

MAX6328XR_ _-T-40°C to +85°C3 SC70-3MAX6328UR_ _-T-40°C to +85°C3 SOT23-3ComputersIntelligent InstrumentsMAX6346XR_ _-T-40°C to +85°C3 SC70-3ControllersAutomotive

MAX6346UR_ _-T-40°C to +85°C3 SOT23-3Critical µP and µCPortable/Battery-Powered MAX6347XR_ _-T-40°C to +85°C3 SC70-3Power Monitoring

Equipment

MAX6347UR_ _-T-40°C to +85°C3 SOT23-3MAX6348XR_ _-T-40°C to +85°C3 SC70-3Pin Configuration

MAX6348UR_ _-T-40°C to +85°C3 SOT23-3†The MAX6326/MAX6327/MAX6328/MAX6346/MAX6347/

MAX6348 are available in factory-set VCCreset thresholds fromTOP VIEW2.2V to 4.63V, in approximately 0.1V increments. Choose thedesired reset-threshold suffix from Table 1 and insert it in theGND1blank spaces following “R.”There are 21 standard versions witha required order increment of 2500 pieces. Sample stock is gen-MAX6326erally held on the standard versions only (see the Selector

MAX6327Guide). Required order increment is 10,000 pieces for nonstan-MAX63283Vdard versions (Table 2). Contact factory for availability. AllMAX6346CCdevices available in tape-and-reel only.

MAX6347Devices are available in both leaded and lead-free packaging.MAX6348Specify lead-free by replacing “-T” with “+T” when ordering.

(RESET) RESET2SOT23-3/SC70-3Selector Guide appears at end of data sheet.

( ) ARE FOR THE MAX6327/MAX6347.________________________________________________________________Maxim Integrated Products1

For pricing, delivery, and ordering information,please contact Maxim/Dallas Direct!at 1-888-629-42, or visit Maxim’s website at www.maxim-ic.com.

MAX6326/MAX6327/MAX6328/MAX6346/MAX6347/MAX6348元器件交易网www.cecb2b.com3-Pin, Ultra-Low-Power SC70/SOTµP Reset CircuitsMAX6326/MAX6327/MAX6328/MAX6346/MAX6347/MAX6348ABSOLUTE MAXIMUM RATINGS

Terminal Voltage (with respect to GND)

VCC...........................................................................-0.3V to +6VRESET, RESET(push-pull).........................-0.3V to (VCC+ 0.3V)RESET(open drain)..................................................-0.3V to +6VInput Current (VCC).............................................................20mAOutput Current (RESET, RESET).........................................20mARate of Rise (VCC)...........................................................100V/µs

Continuous Power Dissipation (TA= +70°C)

3-Pin SC70 (derate 2.7mW/°C above +70°C)...............174mW3-Pin SOT23 (derate 4mW/°C above +70°C)................320mWOperating Temperature Range...........................-40°C to +85°CStorage Temperature Range.............................-65°C to +150°CLead 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 functionaloperation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure toabsolute maximum rating conditions for extended periods may affect device reliability.

ELECTRICAL CHARACTERISTICS

(VCC= full range, TA= -40°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C and VCC= 3V.) (Note 1)

PARAMETERVCCRangeSYMBOLCONDITIONSTA= 0°C to +70°CTA= -40°C to +85°CICCMAX632_ only, VCC= 3.0V for VTH≤2.93V, VCC= 3.2V for VTH> 2.93V, no loadVCC= 5.5V, no loadTA= +25°CReset ThresholdVTHTable 1TA= -40°C to +85°CReset Threshold TempcoVCCto Reset DelayReset Active Timeout PeriodRESETOutput Voltage(MAX6326/MAX6328/MAX6346/MAX6348)RESETOutput Voltage(MAX6326/MAX6346)VOLISINK= 1.6mA, VCC> 2.1V, reset assertedISINK= 100µA, VCC≥1.2V, reset assertedISOURCE= 500µA, VCC= 3.2V, MAX6326 onlyVOHISOURCE= 800µA, VCC= 4.5V, VTH≤4.38VISOURCE= 800µA, VCC= VTH(MAX), VTH≥4.5VVOHRESET Output Voltage(MAX6327/MAX6347)ISOURCE= 500µA, VCC≥2.1V, reset assertedISOURCE= 50µA, VCC≥1.2V, reset assertedISINK= 1.2mA, VCC≥3.2V, reset not asserted,MAX6327 onlyVOLISINK= 3.2mA, VCC≥4.5V, reset not asserted,VTH≤4.38VISINK= 3.2mA, VCC= VTH(MAX), VTH≥4.5VRESET ThresholdHysteresisOpen-Drain RESETOutputLeakage CurrentNote 1:Overtemperature limits are guaranteed by design and not production tested.2

_______________________________________________________________________________________

MAX6326/MAX6327/MAX6328MAX6346/MAX6347/MAX63486.39.50.10.8 ·VCC0.8 ·VCC0.8 ·VCC0.8 ·VCC0.8 ·VCC0.30.40.4mVµAVV∆VTH/°CVCC= VTHto (VTH- 100mV)100VTH-1.5%VTH-2.5%MIN1.01.20.51.0VTHVTH40201852800.30.4TYPMAX5.55.51.01.75VTH+1.5%VTH+2.5%UNITSVSupply CurrentµAVppm/°CµsmsV元器件交易网www.cecb2b.com3-Pin, Ultra-Low-Power SC70/SOT

µP Reset Circuits

__________________________________________Typical Operating Characteristics

(TA = +25°C, unless otherwise noted.)

POWER-DOWN RESET DELAY

SUPPLY CURRENT vs. TEMPERATURE

vs. TEMPERATURE

1.0

1200--660.9223366XXA200A0.8MM)AV = 5VµCC)(0.7s Tµ150

N( E0.6YRARLUVCC = 3.3VEC0.5D YT100

LEP0.4SVOD = 20mVPEURVOD = 10mVS0.30.250

0.1VVOD = 100mVCC = 1.2V00VOD = 200mV-40

-20

0

20

40

60

80

-40

-20

0

20

40

60

80

TEMPERATURE (°C)TEMPERATURE (°C)

POWER-UP RESET TIMEOUT

MAXIMUM TRANSIENT DURATION vs. TEMPERATURE

vs. RESET THRESHOLD OVERDRIVE (SC70)

21030500

40--6622336)6XsXA)200MµAs(Mm N(400

OTIU190TOAERMUDI180T T300

TNEESIE170SRN PAURT200

-160 RMEWUO150MIPXA100

140M130

0

-40

-20

0

20

40

60

80

1

10

100

1000

TEMPERATURE (°C)

RESET THRESHOLD OVERDRIVE,

VTH - VCC (mV)

______________________________________________________________Pin Description

PINPINMAX6326/MAX6346MAX6327NAMEFUNCTIONMAX6328/MAX6348MAX634711GNDGroundActive-Low Reset Output. RESETremains low while VCCis below the reset2—RESETthreshold and for at least 100ms after VCCrises above the reset threshold.RESETis open-drain on the MAX6328/MAX6348 and push-pull on theMAX6326/MAX6346.—2RESETActive-High Reset Output. RESET remains high while VCCis below the resetthreshold and for at least 100ms after VCCrises above the reset threshold.33VCCSupply Voltage_______________________________________________________________________________________3

MAX6326/MAX6327/MAX6328/MAX6346/MAX6347/MAX6348元器件交易网www.cecb2b.com3-Pin, Ultra-Low-Power SC70/SOTµP Reset CircuitsMAX6326/MAX6327/MAX6328/MAX6346/MAX6347/MAX6348____________Applications Information

Interfacing to µPs with Bidirectional Reset Pins

Since the RESEToutput on the MAX6328/MAX6348 isopen drain, these devices interface easily with micro-processors (µPs) that have bidirectional reset pins,such as the Motorola 68HC11. Connecting the µPsupervisor’s RESEToutput directly to the microcon-troller’s (µC’s) RESETpin with a single pull-up resistorallows either device to assert reset (Figure 1).

VCCVCCVCCMAX6328MAX6348µPRESETRESETINPUTMOTOROLA68HCXXNegative-Going VCCTransients

In addition to issuing a reset to the µP during power-up,power-down, and brownout conditions, these devicesare relatively immune to short-duration, negative-goingVCCtransients (glitches).

The Typical Operating Characteristicsshow the Maxi-mum Transient Duration vs. Reset Threshold Overdrivegraph, for which reset pulses are not generated. Thegraph shows the maximum pulse width that a negative-going VCCtransient may typically have when issuing areset signal. As the amplitude of the transient increas-es, the maximum allowable pulse width decreases.

GNDGNDFigure 1. Interfacing to µPs with Bidirectional Reset Pins

Table 1. Factory-Trimmed Reset Thresholds‡

RESET THRESHOLD VOLTAGE, VTH(V)PARTMAX632_ _RMAX632_ _RMAX632_ _RMAX632_ _RMAX632_ _RMAX632_ _RMAX632_ _RMAX632_ _RMAX632_ _RMAX632_ _RMAX634_ _RMAX634_ _RMAX634_ _RMAX634_ _RMAX634_ _RMAX634_ _RSUFFIXMIN222324252627282930313334353637382.1672.2852.32.4622.5912.6602.7582.8862.9553.0343.2503.3493.4473.63.43.743TA= +25°CTYP2.2002.3202.4002.5002.6302.7002.8002.9303.0003.0803.3003.4003.5003.6003.7003.800MAX2.2332.3552.4362.5372.6692.7412.8422.9743.0453.1263.3503.4513.5523.63.7553.857TA= -40°C to +85°CMIN2.1452.2622.3402.4372.52.6332.7302.8572.9253.0033.2173.3153.4123.5103.6073.705MAX2.2502.3752.4602.5622.6962.7682.8703.0003.0753.1503.3833.4853.5873.6903.7923.5‡Factory-trimmed reset thresholds are available in approximately 100mV increments with a 1.5% room-temperature variance.

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µP Reset Circuits

Table 1. Factory-Trimmed Reset Thresholds‡(continued)

RESET THRESHOLD VOLTAGE, VTH(V)PARTSUFFIXTA= +25°CTA= -40°C to +85°CMINTYPMAXMINMAXMAX634_ _R393.8413.9003.9583.8023.997MAX634_ _R403.9404.0004.0603.9004.100MAX634_ _R414.0384.1004.1613.9974.202MAX634_ _R424.1374.2004.2634.09.305MAX634_ _R434.23.3004.34.1924.407MAX634_ _R444.3144.3804.44.2704.4MAX634_ _R4.4324.5004.5674.3874.612MAX634_ _R4.5604.6304.6994.5144.746‡Factory-trimmed reset thresholds are available in approximately 100mV increments with a 1.5% room-temperature variance.

Table 2. Device Marking Codes and Minimum Order Increments

TOP MARKORDER TOP MARKORDER PARTSOT23SC70INCREMENTPART(k)SOT23SC70INCREMENT(k)MAX6346_R46-TFZBIACO2.5MAX6347_R46-TFZBWACF2.5MAX6346_R45-TFZBH–10MAX6347_R45-TFZBV–10MAX6346_R44-TFZBGACK2.5MAX6347_R44-TFZBUACL2.5MAX6346_R43-TFZBF–10MAX6347_R43-TFZBT–10MAX6346_R42-TFZBE–10MAX6347_R42-TFZBS–10MAX6346_R41-TFZBD–10MAX6347_R41-TFZBR–10MAX6346_R40-TFZBC–10MAX6347_R40-TFZBQ–10MAX6346_R39-TFZBB–10MAX6347_R39-TFZBP–10MAX6346_R38-TFZBA–10MAX6347_R38-TFZBO–10MAX6346_R37-TFZAZ–10MAX6347_R37-TFZBN–10MAX6346_R36-TFZAY–10MAX6347_R36-TFZBM–10MAX6346_R35-TFZAX–10MAX6347_R35-TFZBL–10MAX6346_R34-TFZAW–10MAX6347_R34-TFZBK–10MAX6346_R33-TFZAV–10MAX6347_R33-TFZBJ–10MAX6326_R31-TFDAAACE2.5MAX6327_R31-TFMAAACT2.5MAX6326_R30-TFEAA–10MAX6327_R30-TFNAA–10MAX6326_R29-TFCAAACP2.5MAX6327_R29-TFLAAACS2.5MAX6326_R28-TFBAA–10MAX6327_R28-TFKAA–10MAX6326_R27-TFAAA–10MAX6327_R27-TFJAA–10MAX6326_R26-TEZAAACI2.5MAX6327_R26-TFIAAACR2.5MAX6326_R25-TEYAA–10MAX6327_R25-TFHAA–10MAX6326_R24-TEXAA–10MAX6327_R24-TFGAA–10MAX6326_R23-TEWAAACH2.5MAX6327_R23-TFFAAACQ2.5MAX6326_R22-TEHAAAAH2.5MAX6327_R22-TEIAAAAI2.5_______________________________________________________________________________________5

MAX6326/MAX6327/MAX6328/MAX6346/MAX6347/MAX6348元器件交易网www.cecb2b.com3-Pin, Ultra-Low-Power SC70/SOTµP Reset CircuitsMAX6326/MAX6327/MAX6328/MAX6346/MAX6347/MAX6348Table 2. Device Marking Codes and Minimum Order Increments (continued)

PARTMAX6348_R46-TMAX6348_R45-TMAX6348_R44-TMAX6348_R43-TMAX6348_R42-TMAX6348_R41-TMAX6348_R40-TMAX6348_R39-TMAX6348_R38-TMAX6348_R37-TMAX6348_R36-TMAX6348_R35-TTOP MARKSOT23FZCKFZCJFZCIFZCHFZCGFZCFFZCEFZCDFZCCFZCBFZCAFZBZSC70ACN–ACM–––––––––ORDER INCREMENT(k)2.5102.5101010101010101010PARTMAX6348_R34-TMAX6348_R33-TMAX6328_R31-TMAX6328_R30-TMAX6328_R29-TMAX6328_R28-TMAX6328_R27-TMAX6328_R26-TMAX6328_R25-TMAX6328_R24-TMAX6328_R23-TMAX6328_R22-TTOP MARKSOT23FZBYFZBXFVAAFWAAFUAAFTAAFSAAFRAAFQAAFPAAFOAAEJAASC70––ACW–ACV––ACJ––ACUAAJORDER INCREMENT(k)10102.5102.510102.510102.52.5Selector Guide

(standard versions*)

PARTMAX634_ _R46-TMAX634_ _R44-TMAX632_ _R31-TMAX632_ _R29-TMAX632_ _R26-TMAX632_ _R23-TMAX632_ _R22-TNOMINAL VTH(V)4.634.383.082.932.632.322.20___________________Chip Information

TRANSISTOR COUNT: 419

*Sample stock is generally held on all standard versions.

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µP Reset Circuits

Package Information

(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,go to www.maxim-ic.com/packages.)

SPE.L3OPTOS_______________________________________________________________________________________7

MAX6326/MAX6327/MAX6328/MAX6346/MAX6347/MAX6348元器件交易网www.cecb2b.com3-Pin, Ultra-Low-Power SC70/SOTµP Reset CircuitsMAX6326/MAX6327/MAX6328/MAX6346/MAX6347/MAX6348Package Information (continued)

(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,go to www.maxim-ic.com/packages.)

SC70, 3L.EPSPACKAGE OUTLINE, 3L SC7021-0075C11Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses areimplied. Maxim reserves the right to change the circuitry and specifications without notice at any time.

8_____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600©2005 Maxim Integrated Products

Printed USA

is a registered trademark of Maxim Integrated Products, Inc.