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MAX6328UR30-T中文资料

MAX6328UR30-T中文资料
MAX6328UR30-T中文资料

General Description

The MAX6326/MAX6327/MAX6328/MAX6346/MAX6347/MAX6348 microprocessor (μP) supervisory circuits moni-tor the power supplies in μP and digital systems. These devices provide excellent circuit reliability and low cost by eliminating external components and adjustments when used with 2.5V, 3V, 3.3V, and 5V powered circuits.These circuits perform a single function: they assert a reset signal whenever the V CC supply voltage declines below a preset threshold, keeping it asserted for at least 100ms after V CC has risen above the reset threshold.The only difference between the devices is their output.The MAX6326/MAX6346 (push-pull) and MAX6328/MAX6348 (open-drain) have an active-low reset output.The MAX6327/MAX6347 have an active-high push-pull reset output. All of these parts are guaranteed to be in the correct state for V CC down to 1V. The reset compara-tor is designed to ignore fast transients on V CC . Reset thresholds are factory-trimmable between 2.2V and 4.63V, in approximately 100mV increments. Twenty-one standard versions are available. Contact the factory for availability of nonstandard versions.

Ultra-low supply currents (1μA max for the MAX6326/MAX6327/MAX6328) make these parts ideal for use in portable equipment. All six devices are available in space-saving SOT23 and SC70 packages.

Applications

Computers Intelligent Instruments Controllers Automotive

Critical μP and μC Portable/Battery-Powered Power Monitoring

Equipment

Features

?Ultra-Low 1μA (max) Supply Current (MAX6326/MAX6327/MAX6328)

?Precision Monitoring of 2.5V, 3V, 3.3V, and 5V Power-Supply Voltages

?Reset Thresholds Available from 2.2V to 4.63V ?Fully Specified Over Temperature

?100ms (min) Power-On Reset Pulse Width ?Low Cost

?Available in Three Versions: Push-Pull RESET ,Push-Pull RESET, and Open-Drain RESET ?Power-Supply Transient Immunity ?No External Components ?3-Pin SC70/SOT23 Packages

?Pin Compatible with MAX803/MAX809/MAX810

MAX6326/MAX6327/MAX6328/MAX6346/MAX6347/MAX6348

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

μP Reset Circuits

________________________________________________________________Maxim Integrated Products 1

Pin Configuration

19-1294; Rev 4; 12/05

?The MAX6326/MAX6327/MAX6328/MAX6346/MAX6347/

MAX6348 are available in factory-set V CC reset thresholds from 2.2V to 4.63V, in approximately 0.1V increments. Choose the desired reset-threshold suffix from Table 1 and insert it in the blank spaces following “R.”There are 21 standard versions with a required order increment of 2500 pieces. Sample stock is gen-

erally held on the standard versions only (see the Selector

Guide). Required order increment is 10,000 pieces for nonstan-dard versions (Table 2). Contact factory for availability. All devices available in tape-and-reel only.

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

Selector Guide appears at end of data sheet.

For pricing, delivery, and ordering information,please contact Maxim/Dallas Direct!at 1-888-629-4642, or visit Maxim’s website at https://www.sodocs.net/doc/0e17787504.html,.

M A X 6326/M A X 6327/M A X 6328/M A X 6346/M A X 6347/M A X 6348

3-Pin, Ultra-Low-Power SC70/SOT μP Reset Circuits 2

_______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

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

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.

Terminal Voltage (with respect to GND)

V CC ...........................................................................-0.3V to +6V RESET, RESET (push-pull).........................-0.3V to (V CC + 0.3V)RESET (open drain)..................................................-0.3V to +6V Input Current (V CC ).............................................................20mA Output Current (RESET, RESET ).........................................20mA Rate of Rise (V CC )...........................................................100V/μs

Continuous Power Dissipation (T A = +70°C)

3-Pin SC70 (derate 2.7mW/°C above +70°C)...............174mW 3-Pin SOT23 (derate 4mW/°C above +70°C)................320mW Operating Temperature Range ...........................-40°C to +85°C Storage Temperature Range.............................-65°C to +150°C Lead Temperature (soldering, 10s).................................+300°C

Note 1:Overtemperature limits are guaranteed by design and not production tested.

MAX6326/MAX6327/MAX6328/MAX6346/MAX6347/MAX63483-Pin, Ultra-Low-Power SC70/SOTμP Reset Circuits_______________________________________________________________________________________3__________________________________________Typical Operating Characteristics(T A = +25°C, unless otherwise noted.)00.30.20.10.40.50.60.70.80.91.0-400-2020406080SUPPLY CURRENT vs. TEMPERATURE TEMPERATURE (°C)S U P P L Y C U R R E N T(μA)050100150200-400-2020406080POWER-DOWN RESET DELAY vs. TEMPERATURE TEMPERATURE (°C)R E S E T D E L A Y(μs)130150140160170180190200210-400-2020406080POWER-UP RESET TIMEOUT vs. TEMPERATURE M A X6326-03TEMPERATURE (°C)P O W E R-U P R E S E T T I M E O U T(m s)500011001000MAXIMUM TRANSIENT DURATION vs. RESET THRESHOLD OVERDRIVE (SC70)100300400200M A X6326-04RESET THRESHOLD OVERDRIVE,V TH - V CC (mV)M A X I M U M T R A N S I E N T D U R A T I O N(μs)10______________________________________________________________Pin Description

M A X 6326/M A X 6327/M A X 6328/M A X 6346/M A X 6347/M A X 6348

3-Pin, Ultra-Low-Power SC70/SOT μP Reset Circuits 4_______________________________________________________________________________________

____________Applications Information

Interfacing to μPs with Bidirectional Reset Pins

Since the RESET output on the MAX6328/MAX6348 is open drain, these devices interface easily with micro-processors (μPs) that have bidirectional reset pins,such as the Motorola 68HC11. Connecting the μP supervisor’s RESET output directly to the microcon-troller’s (μC’s) RESET pin with a single pull-up resistor allows either device to assert reset (Figure 1).

Negative-Going V CC Transients

In addition to issuing a reset to the μP during power-up,power-down, and brownout conditions, these devices are relatively immune to short-duration, negative-going V CC transients (glitches).

The Typical O perating Characteristics show the Maxi-mum Transient Duration vs. Reset Threshold Overdrive graph, for which reset pulses are not generated. The graph shows the maximum pulse width that a negative-going V CC transient may typically have when issuing a reset signal. As the amplitude of the transient increas-es, the maximum allowable pulse width decreases.

Figure 1. Interfacing to μPs with Bidirectional Reset Pins

Table 1. Factory-Trimmed Reset Thresholds ?

?Factory-trimmed reset thresholds are available in approximately 100mV increments with a 1.5% room-temperature variance.

MAX6326/MAX6327/MAX6328/MAX6346/MAX6347/MAX63483-Pin, Ultra-Low-Power SC70/SOTμP Reset Circuits_______________________________________________________________________________________5Table 1. Factory-Trimmed Reset Thresholds?(continued)?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

M A X 6326/M A X 6327/M A X 6328/M A X 6346/M A X 6347/M A X 6348

3-Pin, Ultra-Low-Power SC70/SOT μP Reset Circuits 6_______________________________________________________________________________________

___________________Chip Information

TRANSISTOR COUNT: 419

Table 2. Device Marking Codes and Minimum Order Increments (continued)

Selector Guide

(standard versions*)

*Sample stock is generally held on all standard versions.

Package Information MAX6326/MAX6327/MAX6328/MAX6346/MAX6347/MAX63483-Pin, Ultra-Low-Power SC70/SOTμP Reset Circuits_______________________________________________________________________________________ (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,

go to https://www.sodocs.net/doc/0e17787504.html,/packages.)

7

M A X 6326/M A X 6327/M A X 6328/M A X 6346/M A X 6347/M A X 6348

3-Pin, Ultra-Low-Power SC70/SOT μP Reset Circuits Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. 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.

Package 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 https://www.sodocs.net/doc/0e17787504.html,/packages .)

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