MAX691EWE+ by Analog Devices

Microprocessor Supervisory Circuits

Status: Active
Series: MAX691
RoHS: Unknown
Download Datasheet Visit Manufacturer Site View Pricing & Stock
The MAX690 family of supervisory circuits reduces the complexity and number of components required for power supply monitoring and battery control functions in microprocessor systems. These include µP reset and backup-battery switchover, watchdog timer, CMOS RAM write protection, and power-failure warning. The MAX690 family significantly improves system reliability and accu- racy compared to that obtainable with separate ICs or discrete components. The MAX690, MAX692, and MAX694 are supplied in 8-pin packages and provide four functions: A reset output during power-up, power-down, and brownout conditions. Battery backup switching for CMOS RAM, CMOS microprocessor or other low power logic. A Reset pulse if the optional watchdog timer has not been toggled within a specified time. A 1.3V threshold detector for power fail warning, low battery detection, or to monitor a power supply other than +5V. The MAX691, MAX693, and MAX695 are supplied in 16-pin packages and perform all MAX690, MAX692, MAX694 functions, plus: Write protection of CMOS RAM or EEPROM. Adjustable reset and watchdog timeout periods. Separate outputs for indicating a watchdog timeout, backup-battery switchover, and low VCC.

Where to Buy

Prices starting from US$6.56

Distributor Stock
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Analog Devices
from US$6.56
5,994
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Newark Electronics
from US$9.59
221
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element14
from US$10.28
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Farnell
from US$9.38
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TME
from US$7.42
0
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Schukat Electronic
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Features

Supervisory Function Integration Saves Board Space while Fully Protecting Microprocessor-Based Systems Precision Voltage Monitor 4.65V (MAX690, MAX691, MAX694, MAX695) 4.40V (MAX692, MAX693) Power OK/Reset Time Delay 50ms, 200ms, or Adjustable Watchdog Timer 100ms, 1.6s, or Adjustable Battery Backup Power Switching Voltage Monitor for Power Fail or Low Battery Warning Minimum External Component Count
Precision Voltage Monitor 4.65V (MAX690, MAX691, MAX694, MAX695) 4.40V (MAX692, MAX693)
4.65V (MAX690, MAX691, MAX694, MAX695)
4.40V (MAX692, MAX693)
Power OK/Reset Time Delay 50ms, 200ms, or Adjustable
50ms, 200ms, or Adjustable
Watchdog Timer 100ms, 1.6s, or Adjustable
100ms, 1.6s, or Adjustable
Battery Backup Power Switching
Voltage Monitor for Power Fail or Low Battery Warning
Minimum External Component Count
Low Power Consumption in Battery Backup Mode Extends Battery Life 1µA Standby Current
1µA Standby Current
Onboard Gating of Chip Enable Signals Protects Against Erroneous Data Written to RAM During Low VCC Events

Specifications

Reset Thresh. (V) 4.5 to 5.0
Reset Out Active HighActive LowPush-Pull
ICC (µA) (max) 5000
Oper. Temp. (°C) -55 to +125-40 to +850 to +70
Package/Pins CDIP/16PDIP/16SOIC (W)/16
BudgetaryPrice (See Notes) 4.64

Last 6 months Inventory & Pricing History

MAX691EWE+ Power Management ICs - PMIC by Analog Devices

MICROPROCESSOR SUPERVISOR WSOIC-16

Semiconductors - ICs
> Power Management ICs - PMIC
> Supervisors & Monitors
Status: Unknown
Series: -
RoHS: Unknown
Download Datasheet Visit Manufacturer Site View Pricing & Stock
The MAX690 family of supervisory circuits reduces the complexity and number of components required for power supply monitoring and battery control functions in microprocessor systems. These include µP reset and backup-battery switchover, watchdog timer, CMOS RAM write protection, and power-failure warning. The MAX690 family significantly improves system reliability and accu- racy compared to that obtainable with separate ICs or discrete components. The MAX690, MAX692, and MAX694 are supplied in 8-pin packages and provide four functions: ● ● A reset output during power-up, power-down, and brownout conditions. ● ● Battery backup switching for CMOS RAM, CMOS microprocessor or other low power logic. ● ● A Reset pulse if the optional watchdog timer has not been toggled within a specified time. ● ● A 1.3V threshold detector for power fail warning, low battery detection, or to monitor a power supply other than +5V. The MAX691, MAX693, and MAX695 are supplied in 16-pin packages and perform all MAX690, MAX692, MAX694 functions, plus: ● ● Write protection of CMOS RAM or EEPROM. ● ● Adjustable reset and watchdog timeout periods. ● ● Separate outputs for indicating a watchdog timeout, backup-battery switchover, and low VCC.

Specifications

Threshold Voltage 4.65V
No. of Supervisors / Monitors 1Monitors
Supply Voltage Min 4.75V
Supply Voltage Max 5.5V
Reset Type Active-High Push-Pull / Active-Low Push-Pull
Digital IC Case WSOIC
No. of Pins 16Pins
Delay Time 50ms
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)

Last 6 months Inventory & Pricing History

Alternative Descriptions

Microprocessor Supervisory Cir | Analog Devices
Microprocessor Supervisor, Wsoic-16 | Newark Electronics
MICROPROCESSOR SUPERVISOR, WSOIC-16 | element14
IC: supervisor circuit | TME
Watchdog 4,65V -40/+85°C SOL16 | Schukat Electronic

Frequently Asked Questions

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Is the MAX691EWE+ RoHS compliant?

This part has not been flagged as RoHS Compliant.

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Authorised distributors including Analog Devices, Newark Electronics, element14, Farnell and TME have stock available or on a lead time for MAX691EWE+ .

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