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Part: MAX6739XK_D_-T
Category:
Power Management
-> Supervisory Circuits
-> Microprocessor Supervisors
Description: MAX6736, MAX6737, MAX6738, MAX6739, MAX6740, MAX6741, MAX6742, MAX6743, MAX6744, MAX6745 Low-power Dual-/triple-voltage SC70 µP Supervisory Circuits
Company: Maxim Integrated Products
Datasheet: Download MAX6739XK_D_-T datasheet File size : 2 kB
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Datasheet text preview:
19-2531; Rev 1; 4/03
Low-Power Dual-/Triple-Voltage SC70 µP Supervisory Circuits
General Description
T h e MAX6736MAX6745 are low-power dual-/triplev o l t a g e microprocessor (µP) supervisors. These devices assert a reset if any monitored supply falls below its factory-trimmed or adjustable threshold and maintain reset for a minimum timeout period after all supplies rise above their thresholds. The integrated dual/triple supervisory circuits significantly reduce size and power compared to separate ICs or discrete components. The low supply current of 6µA makes these devices ideal for portable equipment. T h e MAX6736/MAX6737 are dual fixed-voltage µP supervisors with a manual reset input. The MAX6738/ M A X 6 7 3 9 have one fixed and one adjustable reset t h r e s h o l d and a manual reset input. The MAX6740/ MAX6743 are triple-voltage µP supervisors with two fixed and one user-adjustable reset threshold inputs. The MAX6741/MAX6744 are dual-voltage µP supervisors with a power-OK (POK) output ideal for powersupply sequencing. The MAX6742/MAX6745 monitor t h e primary V C C s u p p l y and have an independent power-fail comparator. The MAX6736MAX6745 monitor I/O supply voltages (V CC1 ) from 1.8V to 5.0V and core supply voltages (VCC2) from 0.9V to 3.3V with factory-trimmed reset t h r e s h o l d voltage options (Table 1). An external adjustable RSTIN input option allows monitoring voltages down to 0.5V. A variety of push-pull or open-drain reset outputs along with manual reset input and power-fail input/output feat u r e s are available (see the Selector Guide). The MAX6736MAX6745 are offered in a space-saving 5-pin SC70 package and operate over the -40°C to +85°C temperature range.
Features
o Dual-/Triple-Supply Reset Voltage Monitors o Precision Factory-Set Reset Thresholds for Monitoring from 0.9V to 5.0V o Adjustable Reset Input Down to 0.488V o 150ms and 1200ms (min) Reset Timeout Period Options o VCC1 Power-OK Output for Power-Supply Sequencing Applications (MAX6741/MAX6744) o Power-Fail Input/Power-Fail Output (MAX6742/MAX6745) o 6µA Supply Current o Tiny SC70 Package
MAX6736MAX6745
Ordering Information
PART MAX6736XK_ _D_-T MAX6737XK_ _D_-T TEMP RANGE -40°C to +85°C -40°C to +85°C PIN-PACKAGE 5 SC70-5 5 SC70-5
Note: The first "_ _" or "_" are placeholders for the threshold voltage levels of the devices. Desired threshold levels are set by the part number suffix found in Tables 1 and 2. The "_" after the D is a placeholder for the reset timeout period suffix found in Table 3. For example, the MAX6736XKLTD3-T is a dual-voltage supervisor VTH1 = 4.625V, VTH2 = 3.075V, and a 150ms minimum reset timeout period. All devices are available in tape-and-reel only. There is a 2500-piece minimum order increment for standard versions (see Table 1). Sample stock is typically held on standard versions only. Nonstandard versions require a minimum order increment of 10,000 pieces. Contact factory for availability.
Applications
Portable/BatteryPowered Equipment Multivoltage Systems Notebook Computers Controllers PDAs GPS Equipment POS Equipment
Ordering Information continued at end of data sheet. Selector Guide continued at end of data sheet. Pin Configurations appear at end of data sheet. Typical Application Circuits appear at end of data sheet. Functional Diagram appears at end of data sheet.
Selector Guide
PART MAX6736 MAX6737 MAX6738 VOLTAGE MONITORS 2 fixed 2 fixed 1 fixed, 1 adj OPEN-DRAIN RESET X -- X PUSH-PULL RESET -- X -- MANUAL RESET X X X POWER-FAIL INPUT/ OUTPUT -- -- -- POK OUTPUT -- -- -- RSTIN INPUT -- -- X
*Manual reset detect on RESET output. ________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com.
Low-Power Dual-/Triple-Voltage SC70 µP Supervisory Circuits MAX6736MAX6745
ABSOLUTE MAXIMUM RATINGS
VCC1, VCC2, POK1 to GND .....-0.3V to +6V Open-Drain RESET, PFO to GND.....-0.3V to +6V Push-Pull RESET to GND..-0.3V to (VCC1 + 0.3V) MR, RSTIN, PFI to GND....-0.3V to (VCC1 + 0.3V) Input/Output Current, All Pins ............20mA Continuous Power Dissipation (TA = +70°C) 5-Pin SC70 (derate 3.1mW/°C above +70°C) .....247mW Operating Temperature Range ...-40°C to +85°C Junction Temperature ......+150°C Storage Temperature Range .....-65°C to +150°C Lead 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 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.
ELECTRICAL CHARACTERISTICS
(VCC = 1.2V to 5.5V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER Operating Voltage Range SYMBOL VCC1, VCC2 CONDITIONS TA = -40°C to 0°C TA = 0°C to +85°C VCC1 = 3.3V, VCC1 > VCC2, no load, reset not asserted VCC1 Supply Current ICC1 VCC1 = 1.8V, VCC1 VCC1, no load, reset not asserted MAX67_ _L MAX67_ _M MAX67_ _T MAX67_ _S Reset Threshold for VCC1 V TH 1 MAX67_ _R MAX67_ _Z MAX67_ _Y MAX67_ _W MAX67_ _V TA = 0°C to +85°C TA = -40°C to +85°C TA = 0°C to +85°C TA = -40°C to +85°C TA = 0°C to +85°C TA = -40°C to +85°C TA = 0°C to +85°C TA = -40°C to +85°C TA = 0°C to +85°C TA = -40°C to +85°C TA = 0°C to +85°C TA = -40°C to +85°C TA = 0°C to +85°C TA = -40°C to +85°C TA = 0°C to +85°C TA = -40°C to +85°C TA = 0°C to +85°C TA = -40°C to +85°C 4.500 4.425 4.250 4.175 3.000 2.950 2.850 2.800 2.550 2.505 2.250 2.213 2.125 2.088 1.620 1.593 1.530 1.503 1.575 1.665 2.188 2.313 2.625 2.925 3.075 4.375 MIN 1 .2 1 .0 5 5 1 10 4.625 TY P MAX 5 .5 5 .5 10 µA 10 2 µA 20 4.750 4.825 4.500 4.575 3.150 3.200 3.000 3.050 2.700 2.745 2.375 2.413 2.250 2.288 1.710 1.737 1.620 1.647 V UNITS V
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Low-Power Dual-/Triple-Voltage SC70 µP Supervisory Circuits
ELECTRICAL CHARACTERISTICS (continued)
(VCC = 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 MAX67_ _T MAX67_ _S MAX67_ _R MAX67_ _Z MAX67_ _Y MAX67_ _W Reset Threshold for VCC2 V TH 2 MAX67_ _V MAX67_ _I MAX67_ _H MAX67_ _G MAX67_ _F MAX67_ _E MAX67_ _D RSTIN Threshold (MAX6738/ MAX6739/MAX6740/MAX6743) RSTIN Input Current Reset Threshold Hysteresis V TH-RSTIN CONDITIONS TA = 0°C to +85°C TA = -40°C to +85°C TA = 0°C to +85°C TA = -40°C to +85°C TA = 0°C to +85°C TA = -40°C to +85°C TA = 0°C to +85°C TA = -40°C to +85°C TA = 0°C to +85°C TA = -40°C to +85°C TA = 0°C to +85°C TA = -40°C to +85°C TA = 0°C to +85°C TA = -40°C to +85°C TA = 0°C to +85°C TA = -40°C to +85°C TA = 0°C to +85°C TA = -40°C to +85°C TA = 0°C to +85°C TA = -40°C to +85°C TA = 0°C to +85°C TA = -40°C to +85°C TA = 0°C to +85°C TA = -40°C to +85°C TA = 0°C to + 85°C TA = -40°C to +85°C MIN 3.000 2.905 2.850 2.800 2.550 2.505 2.250 2.213 2.125 2.088 1.620 1.593 1.530 1.503 1.350 1.328 1.275 1.253 1.080 1.062 1.020 1.002 0.810 0.797 0.765 0.752 0.476 0.468 -10 0.5 0.3 0.3 0.3 0.4 0.8 × V CC 0.8 × V CC V 0.488 0.788 0.833 1.050 1.110 1.313 1.388 1.575 1.665 2.188 2.313 2.625 2.925 TYP 3.075 MAX 3.150 3.050 3.000 3.050 2.700 2.745 2.375 2.413 2.250 2.288 1.710 1.737 1.620 1.647 1.425 1.448 1.350 1.373 1.140 1.158 1.080 1.098 0.855 0.869 0.810 0.824 0.500 0.507 +10 V nA % V UNITS
MAX6736MAX6745
TA = 0°C to +85°C TA = -40°C to +85°C VRSTIN 0.1V (Note 2) VTH1, VTH2, RSTIN, PFI VCC1 1.0V, ISINK = 50µA, TA = 0°C to +85°C
RESET, POK1 Output Low
V OL
VCC1 1.2V, ISINK = 100µA VCC1 2.13V, ISINK = 1.2mA VCC1 4.25V, ISINK = 3.2mA, VCC1 2.38V, ISOURCE = 500µA, output deasserted
RESET Output High (Push-Pull)
V OH
VCC1 4.75V, ISOURCE = 800µA, output deasserted
V
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