MAX6734KASVD2

MAX6734KASVD2 Datasheet

The active-low reset output asserts and remains asserted for the reset timeout period after all the monitored voltages exceed their respective thresholds. Multiple factory-set reset threshold combinations reduce the number of external components required. The MAX6730/MAX6731 monitor a single fixed voltage, the MAX6732/MAX6733 monitor two fixed voltages, and the MAX6734/MAX6735 monitor two fixed voltages and one adjustable voltage. All devices are offered with six minimum reset timeout periods ranging from 1.1ms to 1120ms.

Part	Datasheet
MAX6734KASVD2	MAX6734KASVD2 (pdf)

Related Parts	Information
MAX6734KASHD2-T	MAX6734KASHD2-T
MAX6734KASVD2-T	MAX6734KASVD2-T

PDF Datasheet Preview
Single/Dual/Triple-Voltage uP Supervisory Circuits with Independent Watchdog Output The single/dual/triple-voltage microprocessor uP supervisors feature a watchdog timer and manual reset capability. The offer factory-set reset thresholds for monitoring voltages from +0.9V to +5V and an adjustable reset input for monitoring voltages down to +0.63V. The combination of these features significantly improves system reliability and accuracy when compared to separate ICs or discrete components. The active-low reset output asserts and remains asserted for the reset timeout period after all the monitored voltages exceed their respective thresholds. Multiple factory-set reset threshold combinations reduce the number of external components required. The MAX6730/MAX6731 monitor a single fixed voltage, the MAX6732/MAX6733 monitor two fixed voltages, and the MAX6734/MAX6735 monitor two fixed voltages and one adjustable voltage. All devices are offered with six minimum reset timeout periods ranging from 1.1ms to 1120ms. The feature a watchdog timer with an independent watchdog output. The watchdog timer prevents system lockup during code execution errors. A watchdog startup delay of 54s after reset asserts allows system initialization during power-up. The watchdog operates in normal mode with a 1.68s delay after initialization. The MAX6730/MAX6732/MAX6734 provide an active-low, open-drain watchdog output. The MAX6731/MAX6733/ MAX6735 provide an active-low, push-pull watchdog output. Other features include a manual reset input MAX6730/ MAX6731/MAX6734/MAX6735 and push-pull reset output MAX6731/MAX6733/MAX6735 or open-drain reset output MAX6730/MAX6732/MAX6734 . The MAX6733 are offered in a tiny SOT23-6 package. The MAX6734/MAX6735 are offered in a space-saving SOT23-8 package. All devices are fully specified over the extended -40°C to +85°C temperature range. ●● Multivoltage Systems ●● Telecom/Networking Equipment ●● Computers/Servers ●● Portable/Battery-Operated Equipment ●● Industrial Equipment ●● Printer/Fax ●● Set-Top Boxes Benefits and Features ●● VCC1 Primary Supply Reset Threshold Voltages from +1.575V to +4.63V ●● VCC2 Secondary Supply Reset Threshold Voltages from +0.79V to +3.08V ●● Adjustable RSTIN Threshold for Monitoring Voltages Down to +0.63V MAX6734/MAX6735 Only ●● Six Reset Timeout Options ●● Watchdog Timer with Independent Watchdog Output • 35s min Initial Watchdog Startup Period • 1.12s min Normal Watchdog Timeout Period ●● Manual Reset Input MAX6730/MAX6731/MAX6734/MAX6735 ●● Guaranteed Reset Valid down to VCC1 or VCC2 = +0.8V ●● Push-Pull RESET or Open-Drain RESET Output ●● Immune to Short VCC Transients ●● Low Supply Current 14uA typ at +3.6V ●● Small 6-Pin and 8-Pin SOT23 Packages Pin Configurations appear at end of data sheet. Typical Operating Circuit +0.9V VCORE VCC2 VCC1 RSTIN MAX6734 MAX6735 WDI PUSHBUTTON SWITCH WDO GND +3.3V +1.8V VCC I/O RESET VDD MEMORY Single/Dual/Triple-Voltage uP Supervisory Circuits with Independent Watchdog Output Absolute Maximum Ratings VCC1, VCC2, RSTIN, MR, WDI to GND...................-0.3V to +6V RST, WDO to GND open to +6V RST, WDO to GND push-pull ............... -0.3V to VCC1 + 0.3V Input Current/Output Current all Continuous Power Dissipation TA = +70°C 6-Pin SOT23-6 derate 4.3mW/°C above +70°C .....347.8mW 8-Pin SOT23-8 derate 5.6mW/°C above +70°C .....444.4mW Operating Temperature Range............................ -40°C to +85°C Storage Temperature Range............................. -65°C to +150°C Junction Lead Temperature soldering, 10s .................................. +300°C Soldering Temperature reflow Lead Pb -free Package containing lead Pb 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. Package Thermal Characteristics Note 1 6 SOT23 Junction-to-Ambient Thermal Resistance Junction-to-Case Thermal Resistance Ordering Information PART* MAX6730UT_D_ +T MAX6731UT_D_ +T MAX6732UT_ _D_ +T MAX6733UT_ _D_ -T MAX6734KA_ _D_ -T MAX6734KA_ _ D_+T MAX6734KA_ _D_ /V+T MAX6735KA_ _D_ +T TEMP RANGE -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C PIN-PACKAGE 6 SOT23 6 SOT23 6 SOT23 6 SOT23 8 SOT23 8 SOT23 8 SOT23 8 SOT23 *Insert the threshold level suffixes for VCC1 and VCC2 Table 1 after “UT” or “KA.” For the MAX6730/MAX6731, insert only the VCC1 threshold suffix after the “UT.” Insert the reset timeout delay Table 2 after “D” to complete the part number. For example, the MAX6732UTLTD3+T provides a VCC1 threshold of +4.625V, a VCC2 threshold of +3.075V, and a 210ms reset timeout period. Sample stock is generally held on standard versions only. Standard versions have an order increment requirement of 2500 pieces. Nonstandard versions have an order increment requirement of 10,000 pieces. Contact factory for availability. +Denotes Lead Pb -free packages and - denotes leaded packages. Not all MAX6734KA_ _D_ options are available with leaded -T packages. See for available leaded options. Some devices are available in both leaded and lead Pb -free/ RoHS compliant packaging. For top mark information, please go to /V denotes an automotive qualified part. MANUAL RESET WATCHDOG INPUT WATCHDOG OUTPUT Open Drain Push-Pull Open Drain Push-Pull Open Drain Push-Pull Package Information For the latest package outline information and land patterns footprints , go to 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 LAND NO. PATTERN NO. 6 SOT23 U6+1, U6-1 MAX6733 only 21-0058 90-0175 8 SOT23 K8SN-1 MAX6734 only , K8SN+1 21-0078 90-0176 Chip Information PROCESS BiCMOS Maxim Integrated 13 Single/Dual/Triple-Voltage uP Supervisory Circuits with Independent Watchdog Output 0 1 2 3 4 5 6 10/02 Initial release. 12/02 Released MAX6730/MAX6731. 1/03 Released MAX6733. 3/04 Updated Typical Operating Circuit. 12/05 Added lead-free notation to Ordering Information. 3/09 Updated Pin Description and added Package Table. 11/11 Added automotive-qualified part information 4/13 12/15 Added Package Thermal Characteristics and corrected power dissipation errors and package code for 8 SOT23 Added lead-free part numbers to Ordering Information table, updated Package Information table, and removed Standard Versions table. PAGES CHANGED 1 14 1 7, 14 1 1, 13, 14 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated’s website at Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values min and max limits shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance. Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc. 2015 Maxim Integrated Products, Inc. 14

PDF Datasheet Preview

Single/Dual/Triple-Voltage uP Supervisory Circuits with Independent Watchdog Output

The single/dual/triple-voltage microprocessor uP supervisors feature a watchdog timer and manual reset capability. The offer factory-set reset thresholds for monitoring voltages from +0.9V to +5V and an adjustable reset input for monitoring voltages down to +0.63V. The combination of these features significantly improves system reliability and accuracy when compared to separate ICs or discrete components.

The active-low reset output asserts and remains asserted for the reset timeout period after all the monitored voltages exceed their respective thresholds. Multiple factory-set reset threshold combinations reduce the number of external components required. The MAX6730/MAX6731 monitor a single fixed voltage, the MAX6732/MAX6733 monitor two fixed voltages, and the MAX6734/MAX6735 monitor two fixed voltages and one adjustable voltage. All devices are offered with six minimum reset timeout periods ranging from 1.1ms to 1120ms.

The feature a watchdog timer with an independent watchdog output. The watchdog timer prevents system lockup during code execution errors. A watchdog startup delay of 54s after reset asserts allows system initialization during power-up. The watchdog operates in normal mode with a 1.68s delay after initialization. The MAX6730/MAX6732/MAX6734 provide an active-low, open-drain watchdog output. The MAX6731/MAX6733/ MAX6735 provide an active-low, push-pull watchdog output.

Other features include a manual reset input MAX6730/ MAX6731/MAX6734/MAX6735 and push-pull reset output MAX6731/MAX6733/MAX6735 or open-drain reset output MAX6730/MAX6732/MAX6734 . The MAX6733 are offered in a tiny SOT23-6 package. The MAX6734/MAX6735 are offered in a space-saving SOT23-8 package. All devices are fully specified over the extended -40°C to +85°C temperature range.
●● Multivoltage Systems ●● Telecom/Networking Equipment ●● Computers/Servers ●● Portable/Battery-Operated Equipment ●● Industrial Equipment ●● Printer/Fax ●● Set-Top Boxes

Benefits and Features
●● VCC1 Primary Supply Reset Threshold Voltages from +1.575V to +4.63V
●● VCC2 Secondary Supply Reset Threshold Voltages from +0.79V to +3.08V
●● Adjustable RSTIN Threshold for Monitoring Voltages Down to +0.63V MAX6734/MAX6735 Only
●● Six Reset Timeout Options
●● Watchdog Timer with Independent Watchdog Output
• 35s min Initial Watchdog Startup Period
• 1.12s min Normal Watchdog Timeout Period
●● Manual Reset Input MAX6730/MAX6731/MAX6734/MAX6735
●● Guaranteed Reset Valid down to VCC1 or VCC2 = +0.8V
●● Push-Pull RESET or Open-Drain RESET Output
●● Immune to Short VCC Transients ●● Low Supply Current 14uA typ at +3.6V
●● Small 6-Pin and 8-Pin SOT23 Packages

Pin Configurations appear at end of data sheet.

Typical Operating Circuit
+0.9V VCORE

VCC2

VCC1

RSTIN

MAX6734 MAX6735 WDI

PUSHBUTTON

SWITCH

WDO GND
+3.3V
+1.8V

VCC I/O

RESET

VDD MEMORY

Single/Dual/Triple-Voltage uP Supervisory Circuits with Independent Watchdog Output

Absolute Maximum Ratings

VCC1, VCC2, RSTIN, MR, WDI to GND...................-0.3V to +6V RST, WDO to GND open to +6V RST, WDO to GND push-pull ............... -0.3V to VCC1 + 0.3V Input Current/Output Current all Continuous Power Dissipation TA = +70°C
6-Pin SOT23-6 derate 4.3mW/°C above +70°C .....347.8mW 8-Pin SOT23-8 derate 5.6mW/°C above +70°C .....444.4mW

Operating Temperature Range............................ -40°C to +85°C Storage Temperature Range............................. -65°C to +150°C Junction Lead Temperature soldering, 10s .................................. +300°C Soldering Temperature reflow

Lead Pb -free Package containing lead Pb

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.

Package Thermal Characteristics Note 1
6 SOT23 Junction-to-Ambient Thermal Resistance Junction-to-Case Thermal Resistance
Ordering Information

PART* MAX6730UT_D_ +T MAX6731UT_D_ +T MAX6732UT_ _D_ +T MAX6733UT_ _D_ -T MAX6734KA_ _D_ -T MAX6734KA_ _ D_+T MAX6734KA_ _D_ /V+T MAX6735KA_ _D_ +T

TEMP RANGE -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C

PIN-PACKAGE 6 SOT23 6 SOT23 6 SOT23 6 SOT23 8 SOT23 8 SOT23 8 SOT23 8 SOT23
*Insert the threshold level suffixes for VCC1 and VCC2 Table 1 after “UT” or “KA.” For the MAX6730/MAX6731, insert only the VCC1 threshold suffix after the “UT.” Insert the reset timeout delay Table 2 after “D” to complete the part number. For example, the MAX6732UTLTD3+T provides a VCC1 threshold of +4.625V, a VCC2 threshold of +3.075V, and a 210ms reset timeout period. Sample stock is generally held on standard versions only. Standard versions have an order increment requirement of 2500 pieces. Nonstandard versions have an order increment requirement of 10,000 pieces. Contact factory for availability.
+Denotes Lead Pb -free packages and - denotes leaded packages.

Not all MAX6734KA_ _D_ options are available with leaded -T packages. See for available leaded options.

Some devices are available in both leaded and lead Pb -free/ RoHS compliant packaging.

For top mark information, please go to
/V denotes an automotive qualified part.

MANUAL RESET

WATCHDOG INPUT

WATCHDOG OUTPUT

Open Drain Push-Pull Open Drain Push-Pull Open Drain Push-Pull

Package Information

For the latest package outline information and land patterns footprints , go to 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

LAND

NO. PATTERN NO.
6 SOT23

U6+1, U6-1 MAX6733 only
21-0058
90-0175
8 SOT23

K8SN-1 MAX6734 only , K8SN+1
21-0078
90-0176

Chip Information

PROCESS BiCMOS

Maxim Integrated 13

Single/Dual/Triple-Voltage uP Supervisory Circuits with Independent Watchdog Output
0 1 2 3 4 5 6
10/02 Initial release.
12/02 Released MAX6730/MAX6731.
1/03 Released MAX6733.
3/04 Updated Typical Operating Circuit.
12/05 Added lead-free notation to Ordering Information.
3/09 Updated Pin Description and added Package Table.
11/11 Added automotive-qualified part information
4/13 12/15

Added Package Thermal Characteristics and corrected power dissipation errors and package code for 8 SOT23
Added lead-free part numbers to Ordering Information table, updated Package Information table, and removed Standard Versions table.

PAGES CHANGED
1 14 1 7, 14 1
1, 13, 14
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated’s website at

Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values min and max limits shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.

Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc. 2015 Maxim Integrated Products, Inc. 14

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived MAX6734KASVD2 Datasheet file may be downloaded here without warranties.

Datasheet ID: MAX6734KASVD2 647382