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Active: In Production.

Data Sheet

FULL DATA SHEET (PDF, 124kB) Download   E-Mail

Description

The MAX6369-MAX6374 are pin-selectable watchdog timers that supervise microprocessor (µP) activity and signal when a system is operating improperly. During normal operation, the microprocessor should repeatedly toggle the watchdog input (WDI) before the selected watchdog timeout period elapses to demonstrate that the system is processing code properly. If the µP does not provide a valid watchdog input transition before the timeout period expires, the supervisor asserts a watchdog (active-low WDO) output to signal that the system is not executing the desired instructions within the expected time frame. The watchdog output pulse can be used to reset the µP or interrupt the system to warn of processing errors. The MAX6369-MAX6374 are flexible watchdog timer supervisors that can increase system reliability through notification of code execution errors. The family offers several pin-selectable watchdog timing options to match a wide range of system timing applications: Watchdog startup delay: provides an initial delay before the watchdog timer is started. Watchdog timeout period: normal operating watchdog timeout period after the initial startup delay. Watchdog output/timing options: open drain (100ms) or push-pull (1ms). The MAX6369-MAX6374 operate over a +2.5V to +5.5V supply range and are available in miniature 8-pin SOT23 packages.

Key Features		Applications/Uses
Precision Watchdog Timer for Critical µP Applications Pin-Selectable Watchdog Timeout Periods Pin-Selectable Watchdog Startup Delay Periods Ability to Change Watchdog Timing Characteristics Without Power Cycling Open-Drain or Push-Pull Pulsed Active-Low Watchdog Output Watchdog Timer Disable Feature +2.5V to +5.5V Operating Voltage 8µA Low Supply Current No External Components Required Miniature 8-Pin SOT23 Package		Automotive Critical µP and Microcontroller (µC) Monitoring Embedded Control Systems Industrial Controllers Networking Telecommunications

Diagram

Functional Diagram

Application Notes

Application Note 582: Watchdog Timer Assumes Varied Roles - MAX6371, MAX6373 Application Note 1070: Windowed Watchdog Enhances µP Supervisors - MAX6369, MAX6374 Application Note 1865: Different Ways to Use a MAX6369 Series Watchdog Timer - MAX6369, MAX6370, MAX6371, MAX6372, MAX6373, MAX6374

Design Guides

Microprocessor Supervisory (PDF)

Reliability Reports

Reliability Report: MAX6369.pdf MAX6370.pdf MAX6372.pdf Show FIT data for: MAX6369 MAX6370 MAX6371 MAX6372 MAX6373 MAX6374 Request Reliability Report for: MAX6371 MAX6373 MAX6374

Software/Models

MAX6369 IBIS Model

Ordering Information

Notes: Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day. Part number suffixes: T or T&R = tape and reel;+ = RoHS/lead-free;# = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.

Devices: 1-21 of 21

MAX6369	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX6369KA			Active	SOT;8 pin;9 mm² Outline Drawing: 21-0078 (PDF) Land Pattern: 90-0176 (PDF) Use pkgcode/variation: K8SN-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX6369KA+			Active	SOT;8 pin;9 mm² Outline Drawing: 21-0078 (PDF) Land Pattern: 90-0176 (PDF) Use pkgcode/variation: K8SN+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX6369KA-T			Active	SOT;8 pin;9 mm² Outline Drawing: 21-0078 (PDF) Land Pattern: 90-0176 (PDF) Use pkgcode/variation: K8SN-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX6369KA+T			Active	SOT;8 pin;9 mm² Outline Drawing: 21-0078 (PDF) Land Pattern: 90-0176 (PDF) Use pkgcode/variation: K8SN+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX6370	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX6370KA			Active	SOT;8 pin;9 mm² Outline Drawing: 21-0078 (PDF) Land Pattern: 90-0176 (PDF) Use pkgcode/variation: K8SN-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX6370KA+			Active	SOT;8 pin;9 mm² Outline Drawing: 21-0078 (PDF) Land Pattern: 90-0176 (PDF) Use pkgcode/variation: K8SN+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX6370KA-T			Active	SOT;8 pin;9 mm² Outline Drawing: 21-0078 (PDF) Land Pattern: 90-0176 (PDF) Use pkgcode/variation: K8SN-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX6370KA+T			Active	SOT;8 pin;9 mm² Outline Drawing: 21-0078 (PDF) Land Pattern: 90-0176 (PDF) Use pkgcode/variation: K8SN+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX6371	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX6371KA+			Active	SOT;8 pin;9 mm² Outline Drawing: 21-0078 (PDF) Land Pattern: 90-0176 (PDF) Use pkgcode/variation: K8SN+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX6371KA-T			Active	SOT;8 pin;9 mm² Outline Drawing: 21-0078 (PDF) Land Pattern: 90-0176 (PDF) Use pkgcode/variation: K8SN-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX6371KA+T			Active	SOT;8 pin;9 mm² Outline Drawing: 21-0078 (PDF) Land Pattern: 90-0176 (PDF) Use pkgcode/variation: K8SN+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX6372	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX6372KA+			Active	SOT;8 pin;9 mm² Outline Drawing: 21-0078 (PDF) Land Pattern: 90-0176 (PDF) Use pkgcode/variation: K8SN+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX6372KA-T			Active	SOT;8 pin;9 mm² Outline Drawing: 21-0078 (PDF) Land Pattern: 90-0176 (PDF) Use pkgcode/variation: K8SN-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX6372KA+T			Active	SOT;8 pin;9 mm² Outline Drawing: 21-0078 (PDF) Land Pattern: 90-0176 (PDF) Use pkgcode/variation: K8SN+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX6373	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX6373KA			Active	SOT;8 pin;9 mm² Outline Drawing: 21-0078 (PDF) Land Pattern: 90-0176 (PDF) Use pkgcode/variation: K8SN-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX6373KA-T			Active	SOT;8 pin;9 mm² Outline Drawing: 21-0078 (PDF) Land Pattern: 90-0176 (PDF) Use pkgcode/variation: K8SN-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX6373KA+T			Active	SOT;8 pin;9 mm² Outline Drawing: 21-0078 (PDF) Land Pattern: 90-0176 (PDF) Use pkgcode/variation: K8SN+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX6374	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX6374KA/V+T			Active	SOT;8 pin;9 mm² Outline Drawing: 21-0078 (PDF) Land Pattern: 90-0176 (PDF) Use pkgcode/variation: K8SN+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX6374KA+			Active	SOT;8 pin;9 mm² Outline Drawing: 21-0078 (PDF) Land Pattern: 90-0176 (PDF) Use pkgcode/variation: K8SN+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX6374KA-T			Active	SOT;8 pin;9 mm² Outline Drawing: 21-0078 (PDF) Land Pattern: 90-0176 (PDF) Use pkgcode/variation: K8SN-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX6374KA+T			Active	SOT;8 pin;9 mm² Outline Drawing: 21-0078 (PDF) Land Pattern: 90-0176 (PDF) Use pkgcode/variation: K8SN+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis

More Information

Topmark Coding: MAX6369 MAX6370 MAX6371 MAX6372 MAX6373 MAX6374 New Product Press Release 2000-05-08

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