MAX697EWE+ by Analog Devices

Microprocessor Supervisory Circuits


The MAX696/MAX697 supervisory circuits reduce the complexity and number of components required for power-supply monitoring and battery-control functions in microprocessor (µP) systems. These include µP reset and backup-battery switchover, watchdog timer, CMOS RAM write protection, and power-failure warning. The MAX696/MAX697 significantly improve system reliability and accuracy compared to that obtained with separate ICs or discrete components. The MAX696 and MAX697 are supplied in 16-pin packages and perform six functions: A reset output during power-up, power-down, and brownout conditions. The threshold for this "lowline" reset is adjustable by an external voltage-divider. A reset pulse if the optional watchdog timer has not been toggled within a specified time. Individual outputs for low-line and watchdog fault conditions. The reset time may be left at its default value of 50ms, or may be varied with an external capacitor or clock pulses. A separate 1.3V threshold detector for power-fail warning, low-battery detection, or to monitor a power supply other than VCC. The MAX696 also has battery-backup switching for CMOS RAM, CMOS microprocessor, or other low-power logic. The MAX697 lacks battery-backup switching, but has write-protection pins (active-low CE IN and active-low CE OUT) for CMOS RAM or EPROM. In addition, it consumes less than 250 microamperes.

Where to Buy

Prices starting from US$14.07

Distributor Stock
Logo for Farnell
Farnell
from US$14.07
No stock
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Logo for Newark Electronics
Newark Electronics
from US$15.67
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Logo for element14
element14
from US$14.24
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Features

Adjustable Low-Line Monitor and Power-Down Reset
Power-OK/Reset Time Delay
Watchdog Timer—100ms, 1.6s, or Adjustable
Minimum Component Count
1µA Standby Current
Battery-Backup Power Switching (MAX696)
On-Board Gating of Chip-Enable Signals (MAX697)
Separate Monitor for Power-Fail or Low-Battery Warning

Specifications

Reset Thresh. (V) 1.2 to 1.81.8 to 2.52.5 to 3.33.3 to 5.5
Reset Thresh. Accur. (%) (@ +25°C) 2.5
Reset Out Active HighActive LowPush-Pull
tRESET (min) 1ms to 15ms15ms to 85ms85ms to 300ms300ms to 1s<1ms>1sAdjustable
Watchdog Feature Input (WDI)Input/Output (WDI/WDO)
Watchdog Timeout 1s to 2s<1s>2sAdjustable
Supervisor Features Adjustable Reset InputPower Fail Comparator/Low Battery Detect
ICC (µA) (max) 300
Package/Pins CDIP/16PDIP/16SOIC (W)/16
BudgetaryPrice (See Notes) 5.96


MAX697EWE+ Power Management ICs - PMIC by Analog Devices

MPU SUPERVISOR 5.5V WSOIC-16

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

Specifications

Threshold Voltage 1.3V
No. of Supervisors / Monitors 1Monitors
Supply Voltage Min 3V
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)

Alternative Descriptions

Mpu Supervisor, 5.5V, Wsoic-16 | Newark Electronics
MPU SUPERVISOR, 5.5V, WSOIC-16 | element14

Frequently Asked Questions

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Is the MAX697EWE+ RoHS compliant?

This part has not been flagged as RoHS Compliant.

Which authorised distributors for MAX697EWE+ have stock available?

Authorised distributors including Newark Electronics, element14 and Farnell have stock available or on a lead time for MAX697EWE+ .

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