MAX6736XKTID3-T Maxim Integrated, MAX6736XKTID3-T Datasheet

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MAX6736XKTID3-T

Manufacturer Part Number
MAX6736XKTID3-T
Description
Supervisory Circuits
Manufacturer
Maxim Integrated
Series
MAX6736, MAX6737, MAX6738, MAX6739, MAX6740, MAX6741, MAX6742, MAX6743, MAX6744, MAX6745r
Datasheet

Specifications of MAX6736XKTID3-T

Number Of Voltages Monitored
2
Monitored Voltage
1.8 V to 5 V, 0.9 V to 3.3 V
Undervoltage Threshold
3 V, 1.35 V
Overvoltage Threshold
3.15 V, 1.425 V
Output Type
Active Low, Open Drain
Manual Reset
Resettable
Watchdog
No Watchdog
Battery Backup Switching
No Backup
Power-up Reset Delay (typ)
225 ms
Supply Voltage - Max
5.5 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Package / Case
SC-70
Chip Enable Signals
No
Maximum Power Dissipation
247 mW
Minimum Operating Temperature
- 40 C
Power Fail Detection
No
Supply Current (typ)
5 uA, 10 uA
Supply Voltage - Min
1 V
The MAX6736–MAX6745 are low-power dual-/triple-
voltage 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 com-
ponents. The low supply current of 6µA makes these
devices ideal for portable equipment.
The MAX6736/MAX6737 are dual fixed-voltage µP
supervisors with a manual reset input. The MAX6738/
MAX6739 have one fixed and one adjustable reset
threshold 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 supervi-
sors with a power-OK (POK) output ideal for power-
supply sequencing. The MAX6742/MAX6745 monitor
the primary V
power-fail comparator.
The MAX6736–MAX6745 monitor I/O supply voltages
(V
(V
threshold voltage options (Table 1). An external
adjustable RSTIN input option allows monitoring volt-
ages down to 0.5V.
A variety of push-pull or open-drain reset outputs along
with manual reset input and power-fail input/output fea-
tures are available (see the Selector Guide). The
MAX6736–MAX6745 are offered in a space-saving 5-pin
SC70 package and operate over the -40°C to +85°C
temperature range.
19-2531; Rev 2; 12/05
*Manual reset detect on RESET output.
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.
CC
CC
Portable/Battery-
Powered Equipment
Multivoltage Systems
Notebook Computers
MAX6736
MAX6737
MAX6738
PART
1) from 1.8V to 5.0V and core supply voltages
2) from 0.9V to 3.3V with factory-trimmed reset
CC
________________________________________________________________ Maxim Integrated Products
1 fixed, 1 adj
MONITORS
Low-Power Dual-/Triple-Voltage SC70 µP
supply and have an independent
VOLTAGE
2 fixed
2 fixed
General Description
Controllers
PDAs
GPS Equipment
POS Equipment
OPEN-DRAIN
Applications
RESET
X
X
PUSH-PULL
RESET
X
♦ Dual-/Triple-Supply Reset Voltage Monitors
♦ Precision Factory-Set Reset Thresholds for
♦ Adjustable Reset Input Down to 0.488V
♦ 150ms and 1200ms (min) Reset Timeout Period
♦ V
♦ Power-Fail Input/Power-Fail Output
♦ 6µA Supply Current
♦ Tiny SC70 Package
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-volt-
age supervisor V
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.
Devices are available in both leaded and lead-free packaging.
Specify lead-free by replacing “-T” with “+T” when ordering.
Ordering Information and Selector Guide continued at end
of data sheet.
Pin Configurations, Typical Application Circuits, and
Functional Diagram appear at end of data sheet.
MAX6736XK_ _D_-T
MAX6737XK_ _D_-T
Monitoring from 0.9V to 5.0V
Options
Sequencing Applications (MAX6741/MAX6744)
(MAX6742/MAX6745)
CC
MANUAL
RESET
Supervisory Circuits
1 Power-OK Output for Power-Supply
PART
X
X
X
TH
POWER-FAIL
1 = 4.625V, V
OUTPUT
INPUT/
Ordering Information
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
TH
2 = 3.075V, and a 150ms
Selector Guide
OUTPUT
POK
PIN-PACKAGE
5 SC70-5
5 SC70-5
Features
RSTIN
INPUT
X
1

Related parts for MAX6736XKTID3-T

MAX6736XKTID3-T Summary of contents

Page 1

... MAX6737 2 fixed MAX6738 1 fixed, 1 adj *Manual reset detect on RESET output. ________________________________________________________________ Maxim Integrated Products 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. Supervisory Circuits ♦ Dual-/Triple-Supply Reset Voltage Monitors ♦ Precision Factory-Set Reset Thresholds for Monitoring from 0.9V to 5.0V ♦ ...

Page 2

... Low-Power Dual-/Triple-Voltage SC70 µP Supervisory Circuits ABSOLUTE MAXIMUM RATINGS POK1 to GND ......................................-0. Open-Drain RESET, PFO to GND.............................-0.3V to +6V Push-Pull RESET to GND..........................-0. MR, RSTIN, PFI to GND............................-0. Input/Output Current, All Pins .............................................20mA Continuous Power Dissipation (T = +70°C) A 5-Pin SC70 (derate 3.1mW/°C above +70°C) ..............247mW Stresses beyond those listed under “ ...

Page 3

... SYMBOL Reset Threshold for RSTIN Threshold (MAX6738/ V MAX6739/MAX6740/MAX6743) RSTIN Input Current Reset Threshold Hysteresis RESET, POK1 Output Low RESET Output High (Push-Pull) _______________________________________________________________________________________ Supervisory Circuits CONDITIONS T = 0°C to +85°C A MAX67_ -40°C to +85° 0°C to +85°C A MAX67_ -40° ...

Page 4

... Low-Power Dual-/Triple-Voltage SC70 µP Supervisory Circuits ELECTRICAL CHARACTERISTICS (continued 1.2V to 5.5V -40°C to +85°C, unless otherwise noted. Typical values are PARAMETER SYMBOL RESET Output Open-Drain Leakage Current I (MAX6736/MAX6738) POK1 Output Open-Drain Leakage V Reset Delay CC V Reset Timeout Period ...

Page 5

... TOTAL -40 - TEMPERATURE (°C) _______________________________________________________________________________________ Supervisory Circuits CONDITIONS T = 0°C to +85° TH-PFI T = -40°C to +85°C A ≥ 0.1V (Note PFI PFI 1 ≥ 1.53V 500µA CC SINK 1 ≥ 2.03V ...

Page 6

... Low-Power Dual-/Triple-Voltage SC70 µP Supervisory Circuits (T = +25°C, unless otherwise noted.) A NORMALIZED V TIMEOUT PERIOD vs. TEMPERATURE 1.019 1.014 1.009 1.004 0.999 0.994 0.989 0.984 -40 - TEMPERATURE (°C) NORMALIZED V CC vs. TEMPERATURE 1.008 1.003 0.998 0.993 NORMALIZED TO +25°C 0.988 -40 -20 20 TEMPERATURE (°C) RESET INPUT TO RESET OUTPUT DELAY vs ...

Page 7

... Low-Power Dual-/Triple-Voltage SC70 µ +25°C, unless otherwise noted RESET OUTPUT DELAY 100ns/div V TO RESET OUTPUT DELAY CC 4µs/div _______________________________________________________________________________________ Supervisory Circuits Typical Operating Characteristics (continued) MAX6736-45 toc10 V MR 2V/div V RESET 2V/div MAX6736-45 toc12 500 400 V CC 200mV/div ...

Page 8

... Low-Power Dual-/Triple-Voltage SC70 µP Supervisory Circuits PIN MAX6736 MAX6738 MAX6740 MAX6741 MAX6737 MAX6739 MAX6743 MAX6744 — 4 — 4 — — — — — — — — — — 8 _______________________________________________________________________________________ NAME MAX6742 MAX6745 Reset Output, Push-Pull or Open Drain Active Low. RESET ...

Page 9

... Note: Standard versions, shown in bold, are available in the D3 timeout option only. Samples are typically held on standard versions only. There is a 10,000-piece order increment on non- standard versions. Other threshold voltages may be avail- able; contact factory for availability. _______________________________________________________________________________________ Supervisory Circuits V 2 NOMINAL PART NO. CC VOLTAGE ...

Page 10

... GND Figure 1. Timing Diagram Detailed Description Supply Voltages The MAX6736–MAX6745 µP supervisory circuits main- tain system integrity by alerting the µP to fault condi- tions. These devices are optimized for systems that monitor two or three supply voltages. The reset output state is guaranteed to remain valid while either above 1 ...

Page 11

... The threshold voltage at RSTIN is typi- V EXT_TH R1 RSTIN R2 Figure 3. Monitoring an Additional Voltage ______________________________________________________________________________________ Supervisory Circuits SWITCH BOUNCE t MRP cally 488mV. Connect a resistor-divider network to the circuit as shown in Figure 3 to establish an externally controlled threshold voltage, V Low leakage current at RSTIN allows the use of large- valued resistors, resulting in reduced power consump- tion of the system ...

Page 12

... Low-Power Dual-/Triple-Voltage SC70 µP Supervisory Circuits POSITIVE IN V EXT_TH MAX6742 MAX6745 EXT_TH R1 PFI PFO R2 GND NEGATIVE EXT_TH CC MAX6742 MAX6745 V R1 PFI PFO R2 GND V EXT_TH Figure 4. Using Power-Fail Input to Monitor an Additional Power Supply Adding Hysteresis to the Power-Fail Comparator The power-fail comparator has a typical input hystere- sis of 2 ...

Page 13

... R1, and R2 RSTIN/PFI ______________________________________________________________________________________ Supervisory Circuits 1 POK (POK1) ideal The MAX6736–MAX6745 supervisors are relatively 1 immune to short-duration falling the es usually undesirable to reset the µP when V POKP experiences only small glitches. The Typical Operating Characteristics show Maximum V Duration vs ...

Page 14

... Low-Power Dual-/Triple-Voltage SC70 µP Supervisory Circuits VOLTAGE OPEN-DRAIN PART MONITORS MAX6739 1 fixed, 1 adj MAX6740 2 fixed, 1 adj MAX6741 2 fixed MAX6742 1 fixed MAX6743 2 fixed, 1adj MAX6744 2 fixed MAX6745 1 fixed *Manual reset detect on RESET output. DC/DC CONVERTER UNREGULATED IN OUT DC IN OUT DC/DC CONVERTER SHDN ...

Page 15

... Nonstandard versions require a minimum order increment of 10,000 pieces. Contact factory for availability. Devices are available in both leaded and lead-free packaging. Specify lead-free by replacing “-T” with “+T” when ordering. ______________________________________________________________________________________ Supervisory Circuits RESET MAX6738 ...

Page 16

... 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. 16 ____________________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 ...

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