MAX16016

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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Description

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:
  1. Provide a µP reset output during VCC supply power-up, power-down, and brownout conditions.
  2. 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.
  3. Provide memory write protection through internal chip-enable gating during brownout.
  4. Provide a combination of additional supervisory functions listed in the Features section in the full data sheet.
The MAX16016/MAX16020/MAX16021 operate from a 1.53V to 5.5V supply voltage and offer fixed reset thresholds for monitoring 5V, 3.3V, 3V, 2.5V, and 1.8V systems. Each device is available with either a push-pull or open-drain reset output.

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.
MAX16016, MAX16020, MAX16021: Typical Application Circuit MAX16016, MAX16020, MAX16021: Typical Application Circuit Enlarge+

Key Features

  • 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

Applications/Uses

  • GPS Systems
  • Industrial Control
  • Main/Backup Power for RTCs, CMOS Memories
  • Point-of-Sale Equipment
  • Portable/Battery Equipment
  • Set-Top Boxes

See parametric specs for Battery Backup Circuits (80)


Part NumberReset Thresh.
(V)
Reset OutICC
(µA)
Oper. Temp.
(°C)
Package/PinsBudgetary
Price
maxSee Notes
MAX16016 
1.2 to 1.8
1.8 to 2.5
2.5 to 3.3
3.3 to 5.5
Active Low
Open Drain
Push-Pull
5-40 to +85
TDFN/10
$3.23 @1k
MAX16020 
Active Low
Open Drain
Push-Pull
TQFN/16
$3.16 @1k
MAX16021 
Active High
Active Low
Open Drain
Push-Pull
TQFN/16
$3.23 @1k

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
Product Reliability Reports: MAX16016.pdf 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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