Datasheet

ManualsBrandsMAXIM INTEGRATED ManualsPMICsPMIC - system monitor Dual voltage detector SOT 23 6

General Description

The MAX6351–MAX6360 microprocessor (μP) supervi-

sors with multiple reset voltages significantly improve

system reliability and accuracy compared to separate ICs

or discrete components. If any input supply voltage drops

below its associated preset threshold, all reset outputs

are asserted. In addition, the outputs are valid as long as

either input supply voltage remains greater than +1.0V.

All devices in this series have an active-low debounced

manual-reset input. In addition, the MAX6358/MAX6359/

MAX6360 offer a watchdog timer input with a 46.4s startup

timeout period and a 2.9s timeout period. The MAX6355/

MAX6356/MAX6357 offer an additional voltage-monitor

input to monitor a third voltage.

The MAX6351 features two active-low, push-pull reset

outputs, one is referenced to V

1 and the other is refer-

enced to V

2. The MAX6353/MAX6356/MAX6359 offer

an active-low, push-pull reset output referenced to VCC1.

The MAX6354/MAX6357/MAX6360 offer an active-low,

push-pull reset output referenced to V

All these devices are offered with a wide variety of voltage

threshold levels, as shown in the Voltage-Threshold Levels table.

They are available in 5- and 6-pin SOT23 packages and oper-

ate over the extended (-40°C to +85°C) temperature range.

Features

● Precision Monitoring of Multiple +1.8V, +2.5V, +3.0V,

+3.3V, and +5V Power-Supply Voltages

● Precision Factory-Set Power-Supply

Reset Thresholds

● 20μA Supply Current

● 100ms min Power-On-Reset Pulse Width

● Debounced TTL/CMOS-Compatible

Manual-Reset Input

● Watchdog Timer

• 46.4s Startup Timeout

• 2.9s Normal Timeout

● Fully Guaranteed Over Temperature

● Guaranteed RESET Valid to V

1 = 1V or V

2 = 1V

● Power-Supply Transient Immunity

● No External Components for Dual-Voltage Systems

● Small 5- and 6-Pin SOT23 Packages

● Low Cost

Applications

Note: Standard versions are shown in bold. Sample stock is

generally held on the standard versions only. Contact factory for

availability.

*The _ _ are placeholders for the threshold voltage levels of

the devices. Substitute the part number suffix in the Voltage

Threshold Levels table for the desired voltage level. All devices

are available in tape-and-reel only. There is a 2500 piece

minimum order increment for the SOT package.

Devices are available in both leaded and lead(Pb)-free packag-

ing. Specify lead-free by replacing “-T” with “+T” when ordering.

Pin Configurations appear at end of data sheet.

Selector Guide appears at end of data sheet.

19-1508; Rev 7; 5/14

● Computers

● Controllers

● Portable/Battery-

Powered Equipment

● Intelligent Instruments

● Multivoltage Systems

PART NO.

SUFFIX

(_ _)

1 NOMINAL

VOLTAGE

THRESHOLD (V)

2 NOMINAL

VOLTAGE

THRESHOLD (V)

LT 4.63 3.08

LS 4.63 2.93

LR 4.63 2.63

MT 4.38 3.08

MS 4.38 2.93

MR 4.38 2.63

TZ 3.08 2.32

TY 3.08 2.19

TW 3.08 1.67

TV 3.08 1.58

SZ 2.93 2.32

SY 2.93 2.19

SW 2.93 1.67

SV 2.93 1.58

UW 2.78 1.67

UV 2.78 1.58

RW 2.63 1.67

RV 2.63 1.58

PART TEMP RANGE PIN-PACKAGE

MAX6351_ _UT-T -40°C to +85°C 6 SOT23

MAX6352_ _UK-T -40°C to +85°C 5 SOT23

MAX6353_ _UK-T -40°C to +85°C 5 SOT23

MAX6354_ _UK-T -40°C to +85°C 5 SOT23

MAX6355_ _UT-T -40°C to +85°C 6 SOT23

MAX6356_ _UT-T -40°C to +85°C 6 SOT23

MAX6357_ _UT-T -40°C to +85°C 6 SOT23

MAX6358_ _UT-T -40°C to +85°C 6 SOT23

MAX6359_ _UT-T -40°C to +85°C 6 SOT23

MAX6360_ _UT-T -40°C to +85°C 6 SOT23

MAX6351–MAX6360 Dual/Triple-Voltage

μP Supervisory Circuits

Voltage Threshold Levels

Ordering Information

Summary of content (11 pages)

PAGE 1
MAX6351–MAX6360 General Description The MAX6351–MAX6360 microprocessor (μP) supervisors with multiple reset voltages significantly improve system reliability and accuracy compared to separate ICs or discrete components. If any input supply voltage drops below its associated preset threshold, all reset outputs are asserted. In addition, the outputs are valid as long as either input supply voltage remains greater than +1.0V. All devices in this series have an active-low debounced manual-reset input.
PAGE 2
MAX6351–MAX6360 Dual/Triple-Voltage μP Supervisory Circuits Absolute Maximum Ratings VCC1, VCC2 to GND................................................-0.3V to +6V RST (MAX6352/MAX6355/MAX6358).....................-0.3V to +6V RST, MR, WDI, RST1, RSTIN (MAX6351/MAX6353/ MAX6356/MAX6359)........................... -0.3V to (VCC1 + 0.3V) RST, RST2 (MAX6351/MAX6354/ MAX6357/MAX6360)........................... -0.3V to (VCC2 + 0.3V) Input/Output Current, All Pins..............................................
PAGE 3
MAX6351–MAX6360 Dual/Triple-Voltage μP Supervisory Circuits Electrical Characteristics (continued) (VCC1 = VCC2 = +1.2V to +5.5V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.
PAGE 4
MAX6351–MAX6360 Dual/Triple-Voltage μP Supervisory Circuits Electrical Characteristics (continued) (VCC1 = VCC2 = +1.2V to +5.5V, 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 32 63.5 100 kΩ MR Pullup Resistance MR Minimum Pulse Width tRP 1 MR Glitch Rejection MR to Reset Delay tMD µs 100 ns 0.
PAGE 5
MAX6351–MAX6360 Dual/Triple-Voltage μP Supervisory Circuits Typical Operating Characteristics (continued) (VCC1 = +5V, TA = +25°C, unless otherwise noted.) 1.05 1.00 0.95 0.90 0.85 0.80 -60 -40 -20 0 20 40 60 80 100 200 150 100 DELAY FROM FALL OF VCC1 0.01 0.1 1 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 MAX6351/60-08 0 5V RPULLUP = 100kΩ CLOAD = 10pF 0 RESET THRESHOLD OVERDRIVE, VRST - VCC (V) MANUAL-RESET INPUT TO OUTPUT DELAY 5V RST1 PUSH-PULL OUTPUT www.maximintegrated.
PAGE 6
MAX6351–MAX6360 Dual/Triple-Voltage μP Supervisory Circuits Pin Description PIN MAX6351 MAX6352 MAX6353 MAX6354 MAX6355 MAX6356 MAX6357 MAX6358 MAX6359 MAX6360 NAME 1 — — — RST1 Active-Low, CMOS Reset Output Referenced to VCC1 DESCRIPTION — 1 1 1 RST Active-Low Reset Output. Open drain for the MAX6352/ MAX6355/MAX6358, push-pull with respect to VCC1 for the MAX6353/MAX6356/MAX6359, and push-pull with respect to VCC2 for the MAX6354/MAX6357/MAX6360.
PAGE 7
MAX6351–MAX6360 Dual/Triple-Voltage μP Supervisory Circuits Detailed Description Reset Outputs Supply Voltages The MAX6351–MAX6360 microprocessor (μP) supervisory circuits maintain system integrity by alerting the μP to fault conditions. These ICs monitor multiple-supply systems. The output reset state is guaranteed to remain viable while either VCC1 or VCC2 is above +1V.
PAGE 8
MAX6351–MAX6360 Dual/Triple-Voltage μP Supervisory Circuits During the normal operating mode, the supervisor issues a reset pulse for the reset timeout period (140ms min) if the μP does not update the WDI with a valid transition (high to low or low to high) within the standard timeout period (1.6s min). VCC2 VCC1 After each reset event (VCC power-up, manual reset, or watchdog reset), there is an initial watchdog startup timeout period of 25.6s.
PAGE 9
MAX6351–MAX6360 Dual/Triple-Voltage μP Supervisory Circuits Pin Configurations TOP VIEW RST1 1 GND 2 MAX6351 MR 3 6 VCC1 RST* 1 5 RST2 GND 2 4 VCC2 MR 3 GND 2 MAX6355 MAX6356 MAX6357 MR 3 VCC1 MAX6352 MAX6353 MAX6354 *MAX6352: OPEN-DRAIN OUTPUT *MAX6353: PUSH-PULL OUTPUT (VCC1) *MAX6354: PUSH-PULL OUTPUT (VCC2) 4 VCC2 6 VCC1 5 WDI 4 VCC2 5 SOT23 6 SOT23 RST* 1 5 6 VCC1 RST* 1 5 RSTIN *MAX6355: OPEN-DRAIN OUTPUT *MAX6356: PUSH-PULL OUTPUT (VCC1) *MAX6357: PUSH-PULL OUTPUT
PAGE 10
MAX6351–MAX6360 Chip Information PROCESS: BiCMOS www.maximintegrated.com Dual/Triple-Voltage μP Supervisory Circuits Package Information For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. PACKAGE TYPE PACKAGE CODE OUTLINE NO.
PAGE 11
MAX6351–MAX6360 Dual/Triple-Voltage μP Supervisory Circuits Revision History REVISION NUMBER REVISION DATE 7 5/14 PAGES CHANGED DESCRIPTION Changed the minimum value for the WDI input voltage spec in the Electrical Characteristics table on page 3; rebranded data sheet 1–11 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com.