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Data Sheet

FULL DATA SHEET (PDF, 152kB) Download   E-Mail

Description

The MAX16997/MAX16998 are microprocessor (µP) supervisory circuits for high-input-voltage and low-quiescent-current applications. These devices detect downstream circuit failures and provide switchover to redundant circuitry. See the Selector Guide in the full data sheet for the different versions of this product family. The MAX16997/MAX16998 family has four independent inputs for reset and watchdog functions. SWT and SRT inputs independently set the timeout periods of watchdog and reset timers through external capacitors. RESETIN/EN monitor voltages at respective inputs. A resistive voltage-divider sets the reset threshold. The MAX16998A/B/D generate two output signals, active-low RESET and active-low ENABLE. Active-low RESET asserts whenever RESETIN drops below its threshold voltage or when the watchdog timer detects a timing fault at WDI. Once asserted, and after all reset conditions are removed, active-low RESET remains low for the reset timeout period, tRESET, and then goes high. The MAX16997A generates one output signal (active-low ENABLE) based on the voltage level at EN and the signal at WDI. The MAX16997A does not have a active-low RESET output. The watchdog is disabled if the voltage at EN is below its threshold. The MAX16997A watchdog timer starts timing when the voltage at EN becomes higher than the preset threshold voltage level. Each time EN rises above the preset threshold voltage, the initial watchdog timeout period is 8 times the normal watchdog timeout period (tWP). The MAX16997/MAX16998 are available in 8-pin lead-free µMAX® packages and are fully specified over the -40°C to +125°C automotive temperature range.

Key Features		Applications/Uses
Wide 5V to 40V Input Voltage Range 18µA Quiescent Current (Typical at +125°C) Capacitor-Adjustable Timeout Period for Watchdog and Reset Windowed Watchdog Timer Options (MAX16998B/D) External Voltage Monitoring (RESETIN for the MAX16998A/B/D and EN for the MAX16997A) Car Battery-Compatible EN Input TTL- and CMOS-Compatible Open-Drain Outputs 18V Maximum Open-Drain Reset Output Voltage 28V Maximum Open-Drain Enable Output Voltage Power-On/Power-Off Reset Functionality (MAX16998A/B/D Only) AEC-Q100 Qualified -40°C to +125°C Operating Temperature Range Small (3mm x 3mm) µMAX Package WDI Narrow Pulse Immunity		Automotive Industrial

Diagram

Functional Diagram

Design Guides

Microprocessor Supervisory (PDF) Automotive (PDF)

Reliability Reports

Show FIT data for: MAX16997 MAX16998 Request Reliability Report for: MAX16997 MAX16998

Software/Models

none

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: 1-10 of 10

MAX16997	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX16997AAUA+			Active	µMAX;8 pin;16.2 mm² Outline Drawing: 21-0036 (PDF) Land Pattern: 90-0092 (PDF) Use pkgcode/variation: U8+1*	-40°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX16997AAUA+T			Active	Land Pattern: Not Available	-40°C to +125°C	See data sheet
MAX16998	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX16998BAUA+			Active	µMAX;8 pin;16.2 mm² Outline Drawing: 21-0036 (PDF) Land Pattern: 90-0092 (PDF) Use pkgcode/variation: U8+1*	-40°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX16998BAUA+T			Active	Land Pattern: Not Available	-40°C to +125°C	See data sheet
MAX16998AAUA+			Active	µMAX;8 pin;16.2 mm² Outline Drawing: 21-0036 (PDF) Land Pattern: 90-0092 (PDF) Use pkgcode/variation: U8+1*	-40°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX16998AAUA+T			Active	Land Pattern: Not Available	-40°C to +125°C	See data sheet
MAX16998DAUA+			Active	µMAX;8 pin;16.2 mm² Outline Drawing: 21-0036 (PDF) Land Pattern: 90-0092 (PDF) Use pkgcode/variation: U8+1*	-40°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX16998DAUA+T			Active	Land Pattern: Not Available	-40°C to +125°C	See data sheet
MAX16998AAUA/V+			Active	µMAX;8 pin;16.2 mm² Outline Drawing: 21-0036 (PDF) Land Pattern: 90-0092 (PDF) Use pkgcode/variation: U8+1*	-40°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX16998AAUA/V+T			Active	Land Pattern: Not Available	-40°C to +125°C	See data sheet

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