MAX791ESE+ by Analog Devices

Microprocessor Supervisory Circuit


The MAX791 microprocessor (µP) supervisory circuit reduces the complexity and number of components needed to monitor power-supply and battery-control functions in µP systems. The 50µA supply current makes the MAX791 ideal for use in portable equipment, while the 6ns chip-enable propagation delay and 250mA output capability (25mA in battery-backup mode) make it suitable for larger, higher-performance equipment. The MAX791 comes in 16-pin DIP and narrow SO packages and provides the following functions: µP reset-RESET-bar output is asserted during power-up, power-down, and brownout conditions, and is guaranteed to be in the correct state for VCC down to 1V, even with no battery in the circuit. Manual-reset input. A 1.25V threshold detector provides for power-fail warning and low-battery detection, or monitors a power supply other than +5V. Two-stage power-fail warning-a separate low-line comparator compares VCC to a threshold 150mV above the reset threshold. Backup-battery switchover for CMOS RAM, real-time clocks, µPs, or other low-power logic. Software monitoring of backup-battery voltage. A watchdog-fault output is asserted if the watchdog input has not been toggled within either a preset or an adjustable timeout period. Write protection of CMOS RAM or EEPROM. Pulsed watchdog output, to give advance warning of impending WDO-bar assertion caused by watchdog timeout.

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Prices starting from US$3.49

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Features

Precision 4.65V Voltage Monitoring
200ms Power-OK/Reset Time Delay
Independent Watchdog Timer-Preset or Adjustable
1µA Standby Current
Power Switching 250mA Output in VCC Mode 25mA Output in Battery-Backup Mode
250mA Output in VCC Mode
25mA Output in Battery-Backup Mode
On-Board Gating of Chip-Enable Signals Memory Write-Cycle Completion 6ns CE Gate Propagation Delay
Memory Write-Cycle Completion
6ns CE Gate Propagation Delay
MaxCapâ„¢ or SuperCapâ„¢ Compatible
Voltage Monitor for Power-Fail or Low-Battery Warning
Backup-Battery Monitor
Guaranteed RESET-bar Valid to VCC = 1V

Specifications

Reset Thresh. (V) 3.3 to 5.5
Reset Out Active LowPush-Pull
ICC (µA) (max) 150
Oper. Temp. (°C) -55 to +125-40 to +850 to +70
Package/Pins CDIP/16PDIP/16SOIC (N)/16
BudgetaryPrice (See Notes) 5.86


MAX791ESE+ Drivers & Interfaces by Analog Devices

SUPERVISOR WATCHDOG 1.25VTH 16SOIC

Status: Unknown
Series: -
RoHS: Unknown
Download Datasheet Visit Manufacturer Site View Pricing & Stock

Specifications

Threshold Voltage 4.65V
No. of Supervisors / Monitors 1Monitors
Supply Voltage Min 0V
Supply Voltage Max 5.5V
Reset Type Active-Low
Digital IC Case SOIC
No. of Pins 16Pins
Delay Time 200ms
Operating Temperature Min -40°C
Operating Temperature Max 85°C
Product Range -
Automotive Qualification Standard -
MSL MSL 1 - Unlimited
SVHC No SVHC (15-Jan-2018)
Base Number 791
Operating Temperature Range -40°C to +85°C
Supply Current 50µA
Supply Voltage Range 0V to 5.5V

Alternative Descriptions

Microprocessor Supervisory Cir | Analog Devices
SUPERVISOR, WATCHDOG, 1.25VTH, 16SOIC | element14
Mp Supervisory Circuit, 5.5V, Nsoic-16 | Newark Electronics
IC: Supervisor Integrated Circuit | Transfer Multisort Elektronik

Frequently Asked Questions

Where can I find additional details, specifications and documents for a MAX791ESE+ ?

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Is the MAX791ESE+ RoHS compliant?

This part has not been flagged as RoHS Compliant.

Which authorised distributors for MAX791ESE+ have stock available?

Authorised distributors including Analog Devices, element14, Farnell, CoreStaff and Newark Electronics have stock available or on a lead time for MAX791ESE+ .

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