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MAX6763UTAD3中文资料

General Description

The MAX6754–MAX6764 low-power window detectors monitor undervoltage/overvoltage conditions on system power supplies. These devices assert when the moni-tored voltage is under the undervoltage and/or over the overvoltage thresholds.

The MAX6754–MAX6759/MAX6763/MAX6764 monitor a single voltage. The MAX6760/MAX6761/MAX6762 monitor dual-voltage systems. The MAX6754/MAX6755/MAX6756 provide a single undervoltage/overvoltage output and the MAX6757–MAX6764 provide indepen-dent undervoltage and overvoltage outputs. The out-puts are available in push-pull or open-drain configurations.

The MAX6754–MAX6762 offer factory-fixed voltage thresholds for monitoring system voltages from 0.9V to 5V with a selectable ±5%, ±10%, or ±15% window volt-age. The MAX6763/MAX6764 allow for externally adjustable thresholds. The MAX6754–MAX6762 are available in two delay timing options (20μs, typ or 100ms, min). The MAX6760/MAX6761/MAX6762 also include a latched overvoltage output function and the MAX6754–MAX6762 include a manual reset input.

The family of products is available in small SOT23 and TDFN packages and is specified over the extended temperature range of -40°C to +125°C.

Applications

Features

?Single- or Dual-Supply Voltage Monitors ?Factory-Trimmed Window Threshold Options for 5V, 3.3V, 3V, 2.5V, 1.8V, 1.5V, 1.2V, and 0.9V Supplies ?Externally Adjustable Window Monitoring Options for Supplies Down to 0.5V ?Selectable Window Threshold Options (±5%,±10%, ±15%)?Single (Combined UV/OV) or Dual (Separate UV and OV) Outputs ?20μs (typ) or 100ms (min) Timeout Period Options (MAX6754–MAX6762)?Manual Reset Input (MAX6754–MAX6762)?Latched Overvoltage Output Function (MAX6760/MAX6761/MAX6762)?Immune to Short Voltage Transients ?Low 10μA Supply Current

?Low-Voltage Operation (Outputs Valid for V CC Down to 1V)?-40°C to +125°C Operating Temperature Range ?Small SOT23 and TDFN Packages

MAX6754–MAX6764

Low-Power, Single/Dual-Voltage Window

Detectors

________________________________________________________________Maxim Integrated Products 1

Ordering Information

Typical Application Circuit

19-3075; Rev 1; 12/03

For pricing, delivery, and ordering information,please contact Maxim/Dallas Direct!at 1-888-629-4642, or visit Maxim’s website at https://www.wendangku.net/doc/b218096151.html,.

*Note:Insert the threshold level suffixes for V CC and V CC2(Tables 1 and 2) after UK, UT, or TA. For the

MAX6754–MAX6759, insert only the V CC threshold suffix after the UK or UT. Insert the reset timeout delay (Table 3) after D to complete the part number. For example, the MAX6760TALTD3-T provides a V CC threshold of 5V, a V CC2threshold of 3.3V, and a 100ms minimum reset timeout period. Sample stock is generally held on standard versions only (see the 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.Ordering Information continued at end of data sheet.Pin Configurations appear at end of data sheet.

Telecommunications Networking Computers/Servers Data Storage

Power Metering DC-DC Converter Modules Automotive

M A X 6754–M A X 6764

Low-Power, Single/Dual-Voltage Window Detectors 2_______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(V CC = 1.0V to 6.0V, V CC2= 0 to 6.0V (MAX6760–MAX6762), T A = -40°C to +125°C, unless otherwise noted. Typical values are at T A =+25°C.) (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.

(Voltages with respect to GND)

V CC , V CC2, ............................................................-0.3V to +6.5V SET, OVLATCH, MR , UVIN, OVIN..............-0.3V to (V CC + 0.3V)UV , RESET , OV (open drain).................................-0.3V to +6.5V RESET, OV , UV, UV , RESET (push-pull).....-0.3V to (V CC + 0.3V)Input/Output Current (all pins)............................................20mA

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

5-Pin SOT23-5 (derate 7.1mW/°C above T A = +70°C)....571mW 6-Pin SOT23-6 (derate 8.7mW/°C above T A = +70°C)....696mW 8-Pin TDFN (derate 24.4mW/°C above T A = +70°C).....1951mW Operating Temperature Range .........................-40°C to +125°C Junction Temperature......................................................+150°C Storage Temperature Range.............................-65°C to +150°C Lead Temperature (soldering, 10s).................................+300°C

MAX6754–MAX6764

Low-Power, Single/Dual-Voltage Window

Detectors

ELECTRICAL CHARACTERISTICS (continued)

(V CC = 1.0V to 6.0V, V CC2= 0 to 6.0V (MAX6760–MAX6762), T A = -40°C to +125°C, unless otherwise noted. Typical values are at T A =

M A X 6754–M A X 6764

Low-Power, Single/Dual-Voltage Window Detectors 4_______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

(V CC = 1.0V to 6.0V, V CC2= 0 to 6.0V (MAX6760–MAX6762), T A = -40°C to +125°C, unless otherwise noted. Typical values are at T A =+25°C.) (Note 1)

MAX6754–MAX6764

Low-Power, Single/Dual-Voltage Window

Detectors

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ELECTRICAL CHARACTERISTICS (continued)

(V CC = 1.0V to 6.0V, V CC2= 0 to 6.0V (MAX6760–MAX6762), T A = -40°C to +125°C, unless otherwise noted. Typical values are at T A =

M A X 6754–M A X 6764

Low-Power, Single/Dual-Voltage Window Detectors 6_______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

(V CC = 1.0V to 6.0V, V CC2= 0 to 6.0V (MAX6760–MAX6762), T A = -40°C to +125°C, unless otherwise noted. Typical values are at T A =

MAX6754–MAX6764

Low-Power, Single/Dual-Voltage Window

Detectors

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ELECTRICAL CHARACTERISTICS (continued)

(V CC = 1.0V to 6.0V, V CC2= 0 to 6.0V (MAX6760–MAX6762), T A = -40°C to +125°C, unless otherwise noted. Typical values are at T A =

Note 1:Devices are production tested at +25°C. Overtemperature limits are guaranteed by design.

Note 2:Voltage monitoring requires that V CC must be greater than or equal to 1.4V, but outputs remain asserted in the correct state for V CC down to 1.0V.Note 3:Guaranteed by design.

Note 4:For D0 window detector options and OV outputs, startup delay time is the time required for the internal reference/circuitry to reach specified accuracy after the monitor is powered up from GND.

Note 5:

The input bias voltage is based off of V CC . The minimum value is given by the equation (0.1 x V CC + 0.51)V and the maxi-mum value is given by (0.9 x V CC - 0.51)V.

M A X 6754–M A X 6764

Low-Power, Single/Dual-Voltage Window Detectors 8_______________________________________________________________________________________

Typical Operating Characteristics

(V CC = 5V, V CC2 = 3.3V, T A = +25°C, unless otherwise noted.)

OVERVOLTAGE THRESHOLD

vs. TEMPERATURE

TEMPERATURE (°C)

N O R M A L I Z E D O V E R V O L T A G E T H R E S H O L D (V )

1109580655035205-10-250.980.991.001.011.021.030.97

-40125

UNDERVOLTAGE THRESHOLD

vs. TEMPERATURE

TEMPERATURE (°C)

N O R M A L I Z E D U N D E R V O L T A G E T H R E S H O L D (V )

11095806550

35205-10-250.980.991.00

1.011.021.030.97

-40125

TRANSIENT IMMUNITY vs. THRESHOLD OVERDRIVE

OVERDRIVE (mV)

T R A N S I E N T I M M U N I T Y (μs )

100

1000

D3 TIMEOUT PERIOD vs. TEMPERATURE

M A X 6754 t o c 04

T I M E O U T P E R I O D (m s )

182184186188190192194180

TEMPERATURE (°C)

1109580655035205-10-25-40125

SUPPLY CURRENT vs. SUPPLY VOLTAGE

V CC (V)

I C C (μA )

54328101214

1618206

OUTPUT VOLTAGE LOW vs. SINK CURRENT

I SINK (mA)

V O L (V )

105

0.20.40.60.81.0

1.21.41.61.800

OUTPUT VOLTAGE HIGH vs. SOURCE CURRENT

I SOURCE (mA)

V O H - V C C (V )

105

-1.6

-1.4-1.2-1.0-0.8-0.6-0.4-0.20

-1.8

MAX6754–MAX6764

Low-Power, Single/Dual-Voltage Window

Detectors

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M A X 6754–M A X 6764

Low-Power, Single/Dual-Voltage Window Detectors 10

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Pin Description (continued)

Functional Diagrams

Figure 1. MAX6754/MAX6755/MAX6756 Functional Diagram

MAX6754–MAX6764

Low-Power, Single/Dual-Voltage Window

Detectors

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Figure 2. MAX6757/MAX6758/MAX6759 Functional Diagram

Functional Diagrams (continued)

M A X 6754–M A X 6764

Low-Power, Single/Dual-Voltage Window Detectors 12______________________________________________________________________________________

Figure 3. MAX6760/MAX6761/MAX6762 Functional Diagram

Functional Diagrams (continued)

MAX6754–MAX6764

Low-Power, Single/Dual-Voltage Window

Detectors

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Detailed Description

The MAX6754–MAX6764 are low-power window volt-age detectors capable of monitoring undervoltage and overvoltage conditions on system power supplies.Whenever a monitored voltage falls below its undervolt-age threshold or exceeds its overvoltage threshold,these devices assert their outputs to notify the system (see Functional Diagrams ).

The MAX6754/MAX6755/MAX6756 are single-voltage window detectors with internally fixed nominal voltage,externally adjustable set window, single reset under/overvoltage output, and a manual reset input.The MAX6757/MAX6758/MAX6759 are single-voltage window detectors with internally set nominal voltage,externally adjustable set window, separate under/over-voltage outputs, and manual reset input.

The MAX6760/MAX6761/MAX6762 are dual-voltage window detectors with internally/externally set nominal voltages, externally adjustable set window, separate under/overvoltage outputs, manual reset input, and overvoltage latch functions.

The MAX6763/MAX6764 are single adjustable window detectors with separate under/overvoltage outputs.

The MAX6754–MAX6762 offer factory-fixed voltage thresholds for monitoring system voltages from 0.9V to 5V. The MAX6754–MAX6762 include a SET function to select the window voltage to ±5%, ±10%, or ±15%. The MAX6763/MAX6764 allow for externally adjustable upper and lower voltage thresholds to be set externally (down to 0.5V). The MAX6754–MAX6762 are available with two timing options (20μs propagation delay or 100ms minimum reset timeout).

Supply Voltages

V CC is the power-supply input and the monitored voltage of the MAX6754–MAX6762. These devices feature a fac-tory-trimmed V CC and V CC2divider that sets the nominal input range (see Tables 1 and 2). V CC for the MAX6763/MAX6764 is the power supply of the device and not the monitored voltage. For noisy systems, bypass V CC and V CC2each with a 0.1μF capacitor to GND.

Setting the Adjustable Nominal Voltage

Threshold

The MAX6760/MAX6761/MAX6762 (versions with suffix-es LA, TA, RA, ZA, WA, and AA) offer adjustable nominal voltage threshold to monitor V CC2. Use an external volt-age-divider to set the voltage at V CC2to 0.4255V.Configure SET to select a monitor window of ±5%,±10%, or ±15% (see Figure 5). The MAX6760/MAX6761/MAX6762 suffix AA monitor only V CC2and do not moni-tor V CC .

M A X 6754–M A X 6764

Low-Power, Single/Dual-Voltage Window Detectors 14______________________________________________________________________________________

Choose R2 to have a resistance of up to 500k ?.Calculate R1 by:

R1 = ((V +- 0.4255V) x R2) / 0.4255V

The MAX6763/MAX6764 provide inputs to a window detector allowing the programming of the threshold voltage to within V CC (see Figure 6).Choose R1, R2, and R3 such that:

(V+/ (R1 + R2 + R3)) ≥1μA

SET

The MAX6754–MAX6762 allow the setting of the window voltage range of the voltage detector. Connect SET to GND to set a ±5% window. Connect SET to V CC for a ±10% window. Bias SET to V CC /2 for a ±15% window.

Manual Reset (MR )

The MAX6754–MAX6762 include an active-low manual reset input. Drive MR low to assert a reset output (MAX6754/MAX6755/MAX6756) or an undervoltage output (MAX6757/MAX6758/MAX6759). The output remains asserted for the specified propagation delay time (see Figure 7) after MR goes high. MR is internally pulled to V CC with a 26k ?resistor.

Overvoltage Latch Control Input

(OVLATCH)

The MAX6760/MAX6761/MAX6762 provide an overvolt-age latch control input (OVLATCH ). Drive OVLATCH high to latch the overvoltage output for any V CC or V CC2overvoltage condition. Drive OVLATCH low to clear the latch after overvoltage conditions have been removed. The latch is transparent when OVLATCH is connected to GND. OVLATCH is a high impedance input. Use external pullup or pulldown.

Reset, Undervoltage, and Overvoltage Outputs (RESET, RESET , UV , UV, OV)

RESET, RESET , UV , UV, and OV outputs assert when the monitored supply is below the selected UV TH threshold or above the selected OV TH threshold. The reset output deasserts after the specified timeout peri-od when the monitored supply rises above the UV TH threshold or drops below the OV TH threshold. The push-pull versions are referenced to V CC .

The MAX6760/MAX6761/MAX6762 monitor both V CC and V CC2. An under/overvoltage condition on either voltage supply asserts the corresponding output.RESET and UV are guaranteed to be in the correct logic state when V CC or V CC2> 1V.

MAX6754–MAX6764

Low-Power, Single/Dual-Voltage Window

Detectors

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Applications Information

Microprocessor Monitoring

Figure 8 shows a microprocessor monitoring circuit. An overvoltage condition on either the core or I/O supply

turns the SCR on, blowing the fuse to disconnect the circuit from the power source. An optional capacitor (C1) on the gate of the SCR provides additional tran-sient immunity against nuisance trips.

Figure 8. Microprocessor Monitoring

Selector Guide

M A X 6754–M A X 6764

Low-Power, Single/Dual-Voltage Window Detectors 16______________________________________________________________________________________

MAX6754–MAX6764

Low-Power, Single/Dual-Voltage Window

Detectors

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M A X 6754–M A X 6764

Low-Power, Single/Dual-Voltage Window Detectors 18______________________________________________________________________________________

MAX6754–MAX6764

Low-Power, Single/Dual-Voltage Window

Detectors

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Chip Information

TRANSISTOR COUNT: 726PROCESS: BiCMOS

Pin Configurations

M A X 6754–M A X 6764

Low-Power, Single/Dual-Voltage Window Detectors

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 https://www.wendangku.net/doc/b218096151.html,/packages .)