MAX16021
Low-Power μP Supervisory Circuits with Battery-Backup Circuit and Chip-Enable Gating
Industry's Most Sophisticated Battery-Backup Supervisory Circuits with Chip-Enable Gating and Power-Supply Monitoring
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Overview
Features and Benefits
- System Monitoring for 5V, 3.3V, 3V, 2.5V, or 1.8V Power-Supply Voltages
- 1.53V to 5.5V Operating Voltage Range
- Low 1.2µA Supply Current (0.25µA in Battery-Backup Mode)
- 145ms (min) Reset Timeout Period
- Battery Freshness Seal
- On-Board Gating of CE Signals, 1.5ns Propagation Delay (MAX16020/MAX16021)
- Debounced Manual Reset Input
- Watchdog Timer, 1.2s (typ) Timeout
- Power-Fail Comparator and Low-Line Indicator for Monitoring Voltages Down to 0.6V
- Battery-On, Battery-OK, and Battery Test Indicators
- Small 10-Pin TDFN or 16-Pin TQFN Packages
Product Details
The MAX16016/MAX16020/MAX16021 supervisory circuits monitor power supplies, provide battery-backup control, and chip-enable (CE) gating to write protect memory in microprocessor (µP)-based systems. These low-power devices improve system reliability by providing several supervisory functions in a small, single integrated solution.
The MAX16016/MAX16020/MAX16021 perform four basic system functions:
- Provide a µP reset output during VCC supply power-up, power-down, and brownout conditions.
- Control VCC to battery-backup switching internally to maintain data or low-power operation for memories, real-time clocks (RTCs), and other digital logic when the main power is removed.
- Provide memory write protection through internal chip-enable gating during brownout.
- Provide a combination of additional supervisory functions listed in the Features section in the full data sheet.
The MAX16016/MAX16020/MAX16021 are available in small TDFN/TQFN packages and are fully specified for an operating temperature range of -40°C to +85°C.
Applications
- GPS Systems
- Industrial Control
- Main/Backup Power for RTCs, CMOS Memories
- Point-of-Sale Equipment
- Portable/Battery Equipment
- Set-Top Boxes
Product Categories
Product Lifecycle
Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Documentation & Resources
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MAX16021 Reliability Data1/12/2023PDF33K
Design Resources
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.
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