MAX6751KA29+T Maxim Integrated Products, MAX6751KA29+T Datasheet

IC MPU/RESET CIRC SOT23-8

MAX6751KA29+T

Manufacturer Part Number
MAX6751KA29+T
Description
IC MPU/RESET CIRC SOT23-8
Manufacturer
Maxim Integrated Products
Type
Multi-Voltage Supervisorr
Datasheet

Specifications of MAX6751KA29+T

Number Of Voltages Monitored
2
Output
Open Drain or Open Collector
Reset
Active Low
Reset Timeout
Adjustable/Selectable
Voltage - Threshold
2.925V, Adj
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
SOT-23-8
Monitored Voltage
1.575 V to 5 V
Undervoltage Threshold
2.867 V, Adjustable
Overvoltage Threshold
2.984 V, Adjustable
Output Type
Active Low, Open Drain
Manual Reset
Not Resettable
Watchdog
Watchdog
Battery Backup Switching
No Backup
Supply Voltage (max)
5.5 V
Supply Voltage (min)
1 V
Supply Current (typ)
5 uA
Maximum Power Dissipation
714 mW
Maximum Operating Temperature
+ 125 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 40 C
Power Fail Detection
No
Power-up Reset Delay (typ)
9.487 ms
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
MAX6751KA29+TTR
The MAX6746–MAX6753 low-power microprocessor
(µP) supervisory circuits monitor single/dual system
supply voltages from 1.575V to 5V and provide maxi-
mum adjustability for reset and watchdog functions.
These devices assert a reset signal whenever the V
supply voltage or RESET IN falls below its reset thresh-
old or when manual reset is pulled low. The reset output
remains asserted for the reset timeout period after V
and RESET IN rise above the reset threshold. The reset
function features immunity to power-supply transients.
The MAX6746–MAX6753 have ±2% factory-trimmed
reset threshold voltages in approximately 100mV incre-
ments from 1.575V to 5.0V and/or adjustable reset
threshold voltages using external resistors.
The reset and watchdog delays are adjustable with
external capacitors. The MAX6746–MAX6751 contain a
watchdog select input that extends the watchdog time-
out period by 128x. The MAX6752/MAX6753 contain a
window watchdog timer that looks for activity outside an
expected window of operation.
The MAX6746–MAX6753 are available with a push-pull
or open-drain active-low RESET output. The MAX6746–
MAX6753 are available in an 8-pin SOT23 package and
are fully specified over the automotive temperature
range (-40°C to +125°C).
19-2530; Rev 5; 12/10
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.
Pin Configurations continued at end of data sheet.
Medical Equipment
Automotive
Intelligent Instruments
Portable Equipment
Battery-Powered
Computers/Controllers
TOP VIEW
( ) ARE FOR MAX6746 AND MAX6747 ONLY.
RESET IN (MR)
µP Reset Circuits with Capacitor-Adjustable
SWT
GND
SRT
________________________________________________________________ Maxim Integrated Products
1
2
4
3
General Description
MAX6746–
MAX6751
SOT23-8
Pin Configurations
Embedded Controllers
Critical µP Monitoring
Set-Top Boxes
Computers
6
8
7
5
Applications
V
RESET
WDI
WDS
CC
Reset/Watchdog Timeout Delay
CC
CC
♦ Factory-Set Reset Threshold Options from 1.575V
♦ Adjustable Reset Threshold Options
♦ Single/Dual Voltage Monitoring
♦ Capacitor-Adjustable Reset Timeout
♦ Capacitor-Adjustable Watchdog Timeout
♦ Min/Max (Windowed) Watchdog Option
♦ Manual Reset Input Option
♦ Guaranteed RESET Valid for V
♦ 3.7µA Supply Current
♦ Push-Pull or Open-Drain RESET Output Options
♦ Power-Supply Transient Immunity
♦ Small 8-Pin SOT23 Packages
Selector Guide appears at end of data sheet.
Typical Operating Circuit appears at end of data sheet.
Note: “_ _” represents the two number suffix needed when
ordering the reset threshold voltage value for the
MAX6746/MAX6747 and MAX6750–MAX6753. The reset
threshold voltages are available in approximately 100mV incre-
ments. Table 2 contains the suffix and reset factory-trimmed
voltages. All devices are available in tape-and-reel only. There
is a 2500-piece minimum order increment for standard ver-
sions (see Table 3). 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.
/V Denotes an automotive qualified part.
MAX6746KA_ _-T
MAX6746KA_ _/V+T
MAX6747KA_ _-T
MAX6748KA-T
MAX6749KA-T
MAX6750KA_ _-T
MAX6750KA_ _/V+T
MAX6751KA_ _-T
MAX6752KA_ _-T
MAX6753KA_ _-T
MAX6753KA_ _/V+T
to 5V in ~100mV Increments
PART
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
Ordering Information
TEMP RANGE
CC
≥ 1V
PIN-PACKAGE
8 SOT23
8 SOT23
8 SOT23
8 SOT23
8 SOT23
8 SOT23
8 SOT23
8 SOT23
8 SOT23
8 SOT23
8 SOT23
Features
1

Related parts for MAX6751KA29+T

MAX6751KA29+T Summary of contents

Page 1

... SOT23 ARE FOR MAX6746 AND MAX6747 ONLY. Pin Configurations continued at end of data sheet. ________________________________________________________________ Maxim Integrated Products 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. Reset/Watchdog Timeout Delay ♦ Factory-Set Reset Threshold Options from 1.575V ~100mV Increments ♦ ...

Page 2

Reset Circuits with Capacitor-Adjustable Reset/Watchdog Timeout Delay ABSOLUTE MAXIMUM RATINGS V to GND ...........................................................-0.3V to +6.0V CC SRT, SWT, SET0, SET1, RESET IN, WDS, MR, WDI, to GND .......................................…-0. RESET (Push-Pull) to GND......................…-0. RESET (Open ...

Page 3

Reset Circuits with Capacitor-Adjustable ELECTRICAL CHARACTERISTICS (continued +1.2V to +5.5V MIN MAX PARAMETER SYMBOL Fast Watchdog Timeout Period, SET Ratio = 64, (MAX6752/MAX6753) Fast Watchdog Minimum Period (MAX6752/MAX6753) SWT Ramp ...

Page 4

Reset Circuits with Capacitor-Adjustable Reset/Watchdog Timeout Delay (V = +5V +25°C, unless otherwise noted RESET TIMEOUT PERIOD vs. C SRT 1000 100 10 1 0.1 100 1000 10,000 100,000 C (pF) SRT NORMALIZED RESET TIMEOUT ...

Page 5

Reset Circuits with Capacitor-Adjustable (V = +5V +25°C, unless otherwise noted RESET DELAY CC vs. TEMPERATURE (V FALLING) CC 27.0 V FALLING AT 1mV/μs CC 26.6 26.2 25.8 25.4 25.0 -50 -25 0 ...

Page 6

Reset Circuits with Capacitor-Adjustable Reset/Watchdog Timeout Delay PIN MAX6746 MAX6748– MAX6752 MAX6747 MAX6751 MAX6753 5 5 — — — _______________________________________________________________________________________ Pin Description (continued) NAME Watchdog Select Input. WDS ...

Page 7

Reset Circuits with Capacitor-Adjustable GUARANTEED TO ASSERT RESET WDI CONDITION 1 WDI CONDITION 2 WDI CONDITION 3 *UNDETERMINED STATES MAY OR MAY NOT GENERATE A FAULT CONDITION Figure 1. MAX6752/MAX6753 Detailed Watchdog Input Timing Relationship Detailed Description The MAX6746–MAX6753 ...

Page 8

Reset Circuits with Capacitor-Adjustable Reset/Watchdog Timeout Delay V MON_TH R1 RESET IN MAX6748 R2 MAX6749 MAX6750 GND MAX6751 Figure 3. Adding an External Manual Reset Function to the MAX6748–MAX6751 where V is the desired reset threshold voltage MON_TH and ...

Page 9

Reset Circuits with Capacitor-Adjustable V CC WDI RESET OV EXTENDED MODE (WDS = Figure 4b. Watchdog Timing Diagram, WDS = V MAX6746–MAX6751 The watchdog’s circuit monitors the µP’s activity. It the µP does ...

Page 10

Reset Circuits with Capacitor-Adjustable Reset/Watchdog Timeout Delay t < t (MIN) WDI WD1 WDI RESET (a) FAST FAULT t > t (MAX) WDI WD2 WDI RESET (b) SLOW FAULT t (MAX) < t < t (MIN) WD1 WDI WD2 ...

Page 11

Reset Circuits with Capacitor-Adjustable Interfacing to Other Voltages for Logic Compatibility The open-drain RESET output can be used to interface to a µP with other logic levels. As shown in Figure 6, the open-drain output can be connected to ...

Page 12

Reset Circuits with Capacitor-Adjustable Reset/Watchdog Timeout Delay Table 2. Reset Threshold Voltage Suffix (T = -40°C to +125°C) A SUFFIX MIN TYP 50 4.900 5.000 49 4.802 4.900 48 4.704 4.800 47 4.606 4.700 46 4.533 4.625 45 4.410 ...

Page 13

Reset Circuits with Capacitor-Adjustable FIXED V ADJUSTABLE CC PART RESET RESET THRESHOLD THRESHOLD MAX6746 X — MAX6747 X — MAX6748 — X MAX6749 — X MAX6750 X X MAX6751 X X MAX6752 X — MAX6753 X — Typical Operating ...

Page 14

... 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. 14 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2010 Maxim Integrated Products DESCRIPTION Maxim is a registered trademark of Maxim Integrated Products, Inc ...

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