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Description

FULL DATA SHEET (PDF, 212kB) Download   E-Mail The MAX691A/MAX693A/MAX800L/MAX800M microprocessor (µP) supervisory circuits are pin-compatible upgrades to the MAX691, MAX693, and MAX695. They improve performance with 30µA supply current, 200ms typ reset active delay on power-up, and 6ns chip-enable propagation delay. Features include write protection of CMOS RAM or EEPROM, separate watchdog outputs, backup-battery switchover, and a RESET-bar output that is valid with VCC down to 1V. The MAX691A/MAX800L have a 4.65V typical reset-threshold voltage, and the MAX693A/MAX800M's reset threshold is 4.4V typical. The MAX800L/MAX800M guarantee power-fail accuracies to ±2%.

Key Features		Applications/Uses
200ms Power-OK/Reset Timeout Period 1µA Standby Current, 30µA Operating Current On-Board Gating of Chip-Enable Signals, 10ns max Delay MaxCap® or SuperCap Compatible Guaranteed Active-Low RESET Assertion to VCC = +1V Voltage Monitor for Power-Fail or Low-Battery Warning Power-Fail Accuracy Guaranteed to ±2% (MAX800L/M) Available in 16-Pin Narrow SO, Plastic DIP, and TSSOP Packages Underwriters Laboratories (UL®) Recognized		Automotive Electronics Computers: Desktop, Workstation, Server Controllers Critical µP Monitoring Intelligent Instruments

Key Specifications:  Battery Backup Circuits
Part Number	Reset Thresh. (V)	Reset Out	Reset Out	ICC (µA)	Features	Industry Qualified	Package/Pins	Smallest Available Pckg. (mm2)	Oper. Temp. (°C)	Price
		Active Low	Active High	max				max w/pins		See Notes
MAX691A	-	Push-Pull	Push-Pull	100	Adjustable Reset Input Battery On Chip Enable Gate Low Line Power Fail Comparator Watchdog	Automotive - General MIL-STD-883B	CDIP(N)/16 PDIP(N)/16 SOIC(N)/16 SOIC(W)/16 TSSOP/16	33	-55 to +125 -40 to +85 0 to +70	$3.61 @1k
MAX693A	-					Automotive - General MIL-STD-883B	CDIP(N)/16 PDIP(N)/16 SOIC(N)/16 SOIC(W)/16 TSSOP/16			$3.61 @1k
MAX800	3.3 to 5.5					Automotive - General	PDIP(N)/16 SOIC(N)/16 TSSOP/16			$3.88 @1k
See All Battery Backup Circuits (86)

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Document Ref.: 19-0094; Rev 11; 2008-09-10
This page last modified: 2008-09-10