Datasheet

ManualsBrandsMAXIM INTEGRATED ManualsPMICsPMIC - system monitor Dual voltage detector SOT 23 5

General Description

The MAX6305–MAX6313 CMOS microprocessor (µP)

supervisory circuits are designed to monitor more than

one power supply. Ideal for monitoring both 5V and

3.3V in personal computer systems, these devices

assert a system reset if any of the monitored supplies

falls outside the programmed threshold. Low supply

current (15µA) and a small package suit them for

portable applications. The MAX6305–MAX6313 are

specifically designed to ignore fast transients on

any monitored supply.

These devices are available in a SOT23-5 package,

have factory-programmed reset thresholds from 2.5V to

5.0V (in 100mV increments), and feature four power-on

reset timeout periods. Ten standard versions are avail-

able. Contact the factory for availability of non standard

versions.

Applications

Portable Computers

Computers

Controllers

Intelligent Instruments

Portable/Battery-Powered Equipment

Multivoltage Systems: 3V/5V, 5V/12V, 5V/24V

Embedded Control Systems

Features

o Small 5-Pin SOT23 Package

o Precision Factory-Set V

Reset Thresholds;

Available in 0.1V Increments from 2.5V to 5V

o Immune to Short V

Transients

o Guaranteed RESET Valid to V

= 1V

o Guaranteed Over Temperature

o 8µA Supply Current

o Factory-Set Reset Timeout Delay from

1ms (min) to 1120ms (min)

o No External Components

o Manual Reset Input

o Under/Overvoltage Supply Monitoring

MAX6305–MAX6313

5-Pin, Multiple-Input,

Programmable Reset ICs

19-1145; Rev 6; 7/12

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.

Ordering Information

†

The MAX6306/MAX6307/MAX6309/MAX6310/MAX6312/

MAX6313 are available with factory-set V

reset thresholds from

2.5V to 5V, in 0.1V increments. Insert the desired nominal reset

threshold (from Table 1) into the blanks following the letters UK.

All parts also offer factory-programmed reset timeout periods.

Insert the number corresponding to the desired nominal timeout

period index following the “D” in the part number (D1 = 1ms min,

D2 = 20ms min, D3 = 140ms min, and D4 = 1120ms min). There

are 10 standard versions with a required order increment of 2,500

pieces. Sample stock is generally held on the standard versions

only (see Standard Versions table). Required order increment is

10,000 pieces for non-standard versions. Contact factory for

availability of non-standard versions. 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.

Pin Configurations and Typical Operating Circuit appear at

end of data sheet.

Ordering Information continued at end of data sheet.

Standard Versions Table appears at end of data sheet.

_______________________________________________________________Selector Table

PART

OPEN-DRAIN

RESET

OUTPUT

PUSH/PULL

RESET

OUTPUT

PUSH/PULL

RESET

OUTPUT

FACTORY-

SET RESET

THRESHOLD

ON V

ADDITIONAL

UNDERVOLTAGE

RESET INPUTS

NEGATIVE/

OVERVOLTAGE

RESET INPUT

MAX6305



— — — 2 —

MAX6306



— —



1 —

MAX6307



— —



MAX6308 —



— — 2 —

MAX6309 —



—



1 —

MAX6310 —



—



MAX6311 — —



— 2 —

MAX6312 — —

 

1 —

MAX6313 — —

 



MANUAL-

RESET

INPUT

—



—



—



—

PART

†

TEMP RANGE

PIN -

PA C K A G E

MAX6305UK00D_-T -0°C to +70°C 5 SOT23

MAX6305EUK00D_-T

-40°C to +85°C 5 SOT23

Summary of content (11 pages)

PAGE 1
9-1145; Rev 6; 7/12 5-Pin, Multiple-Input, Programmable Reset ICs The MAX6305–MAX6313 CMOS microprocessor (µP) supervisory circuits are designed to monitor more than one power supply. Ideal for monitoring both 5V and 3.3V in personal computer systems, these devices assert a system reset if any of the monitored supplies falls outside the programmed threshold. Low supply current (15µA) and a small package suit them for portable applications.
PAGE 2
MAX6305–MAX6313 5-Pin, Multiple-Input, Programmable Reset ICs ABSOLUTE MAXIMUM RATINGS VCC ...........................................................................-0.3V to +6V All Other Pins..............................................-0.3V to (VCC + 0.3V) Input/Output Current, All Pins .............................................20mA Rate of Rise, VCC ............................................................100V/µs Continuous Power Dissipation (TA = +70°C) SOT23 (derate 7.1mW/°C above +70°C) .....
PAGE 3
5-Pin, Multiple-Input, Programmable Reset ICs VCC = +2.5V to +5.5V for the MAX6305/MAX6308/MAX6311, VCC = (VTH + 2.5%) to +5.5V for the MAX6306/MAX6307/MAX6309/ MAX6310/MAX6312/MAX6313; TA = -40°C to +85°C; unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS MANUAL-RESET INPUT (MAX6306/MAX6309/MAX6312) VIL MR Input VIH VIL VIH VTH > 4.0V VTH < 4.0V TA = 0°C to +70°C MR Minimum Input Pulse Width TA = -40°C to +85°C 0.8 2.4 0.3 x VCC 0.
PAGE 4
__________________________________________Typical Operating Characteristics (VCC = +5V, TA = +25°C, unless otherwise noted.) 7.0 VCC = 3.5V 5.5 40 30 20 10mV µs 10 VCC = 2.5V 5.0 -40 -20 0 20 40 60 80 40 30 20 -60 -40 -20 0 20 40 60 80 -60 100 -40 -20 0 20 40 60 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) RST IN_ FALLING PROPAGATION DELAY vs. TEMPERATURE RESET TIMEOUT vs. TEMPERATURE RESET THRESHOLD vs. TEMPERATURE 80 60 40 10mV µs 20 1.06 1.04 1.02 1.00 0.98 0.
PAGE 5
-Pin, Multiple-Input, Programmable Reset ICs PIN MAX6305 MAX6308 MAX6311 1 MAX6306 MAX6309 MAX6312 1 MAX6307 MAX6310 MAX6313 NAME FUNCTION RESET Active-Low, Open-Drain Reset Output for the MAX6305/MAX6306/ MAX6307. Active-Low, Push/Pull Reset Output (sources and sinks current) for the MAX6308/MAX6309/MAX6310.
PAGE 6
MAX6305–MAX6313 5-Pin, Multiple-Input, Programmable Reset ICs open-drain, N-channel output. The MAX6308/MAX6309/ MAX6310 feature an active-low, complementary output structure that both sinks and sources current, and the MAX6311/MAX6312/MAX6313 have an active-high complementary reset output. The MAX6305/MAX6308/MAX6311 switch from undervoltage lockout operation to normal operation between 1.5V < VCC < 2.5V. Below 1.5V, VCC undervoltagelockout mode asserts RESET. Above 2.
PAGE 7
5-Pin, Multiple-Input, Programmable Reset ICs VCC VCC VCC R1 MAX6305– MAX6313 RST IN_ VTH = R2 ( ) R1 + R2 VRSTH R2 C* GND *ƒC = ( 1 R1 + R2 2π R1 x R2 x C ) MAX6305 MAX6306 RESET MAX6307 RESET GENERATOR GND RESET µP GND *FOR ADDITIONAL NOISE IMMUNITY Figure 2. Increasing Noise Immunity Figure 3. Interfacing to µPs with Bidirectional Reset I/O The ±25nA max input leakage current allows resistors on the order of megohms.
PAGE 8
MAX6305–MAX6313 5-Pin, Multiple-Input, Programmable Reset ICs currents, holding RESET low (Figure 4). The pull-down resistor’s value is not critical; 100kΩ is large enough not to load RESET and small enough to pull RESET to ground. For applications where RESET must be valid to VCC, a 100kΩ pull-up resistor between RESET and VCC will hold RESET high when VCC falls below 1V (Figure 5). Since the MAX6305/MAX6306/MAX6307 have opendrain, active-low outputs, they typically use a pull-up resistor.
PAGE 9
5-Pin, Multiple-Input, Programmable Reset ICs PART† MAX6306UK_ _D_-T MAX6306EUK_ _D_-T TEMP RANGE PINPACKAGE -0°C to +70°C 5 SOT23 -40°C to +85°C 5 SOT23 MAX6307UK_ _D_-T -0°C to +70°C 5 SOT23 MAX6307EUK_ _D_-T -40°C to +85°C 5 SOT23 MAX6308UK00D_-T -0°C to +70°C 5 SOT23 MAX6308EUK00D_-T -40°C to +85°C 5 SOT23 MAX6309UK_ _D_-T -0°C to +70°C 5 SOT23 MAX6309EUK_ _D_-T -40°C to +85°C 5 SOT23 MAX6310UK_ _D_-T -0°C to +70°C 5 SOT23 MAX6310EUK_ _D_-T -40°C to +85°C 5 SOT23 MAX6311UK
PAGE 10
5-Pin, Multiple-Input, Programmable Reset ICs MAX6305–MAX6313 Pin Configurations TOP VIEW (RESET) RESET 1 GND 2 5 VCC MAX6305 MAX6308 MAX6311 RST IN1 3 (RESET) RESET 1 GND 2 4 RST IN2 VCC (RESET) RESET 1 MAX6306 MAX6309 MAX6312 MR 3 SOT23-5 ( ) ARE FOR MAX6311 5 RST IN 3 RST IN SOT23-5 ( ) ARE FOR MAX6312 VCC 4 OVRST IN MAX6307 MAX6310 MAX6313 GND 2 4 5 SOT23-5 ( ) ARE FOR MAX6313 Package Information For the latest package outline information and land patterns (footprints), go t
PAGE 11
5-Pin, Multiple-Input, Programmable Reset ICs REVISION NUMBER REVISION DATE DESCRIPTION PAGES CHANGED 0 9/96 Initial release 1 8/98 Make corrections to EC table and Figures 1 and 8. 3, 6, 8 — 2 4/99 Added Standard Versions Table and note to the Ordering Information table. Text added to the General Description. 1, 13 3 11/05 Added lead-free option to the Ordering Information table. 1, 13 4 12/07 Updated Table 2 and Package Outline.