1% Accuracy / Low-Power / +3V and +5V uP Supervisory Circuits
|Total Page||16 Pages|
|Features||Datasheet pdf 19-0412; Rev 0; 6/95 ±1% Accuracy, Low -Power, +3V and +5V µP Supervisory Cir cuits _______________General Descriptio n The MAX814/MAX815/MAX816 are high-acc uracy microprocessor (µP) supervisory circuits that provide power-on reset, w atchdog, and power-fail functions. They eliminate manual trimming and improve reliability in critical applications ne eding high-accuracy reset thresholds. T he RESET output is guaranteed to be in the correct state for VCC down to 1V. T he reset comparator is designed to igno re fast transients on VCC. Reset thresh olds are available for operation with a variety of 3V and 5V supply voltages. A 75µA maximum supply current makes th e MAX814/ MAX815/MAX816 ideal for use in.|
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19-0412; Rev 1; 12/05
±1% Accuracy, Low-Power, +3V and +5V
µP Supervisory Circuits
_______________General Description ____________________________Features
The MAX814/MAX815/MAX816 are high-accuracy
microprocessor (µP) supervisory circuits that provide
power-on reset, watchdog, and power-fail functions.
They eliminate manual trimming and improve reliability
in critical applications needing high-accuracy reset
thresholds. The RESET output is guaranteed to be in
the correct state for VCC down to 1V. The reset com-
parator is designed to ignore fast transients on VCC.
Reset thresholds are available for operation with a vari-
ety of 3V and 5V supply voltages.
A 75µA maximum supply current makes the MAX814/
MAX815/MAX816 ideal for use in portable equipment. All
three devices are available in 8-pin DIP and SO pack-
ages. See the Selector Table for a review of features.
♦ ±1% Worst-Case Reset Threshold Accuracy
♦ 4.8V, 4.7V, 4.55V, 3.03V, or Adjustable Reset
♦ ±1% Low-Line Threshold Accuracy (MAX814)
60mV Above Reset Threshold
♦ 200ms Reset Time Delay
♦ Active-Low RESET Output
Active-High RESET Output (MAX814/MAX816)
♦ 75µA Max Supply Current
♦ Guaranteed RESET Valid to VCC = 1V
♦ Manual Reset Input
♦ ±2% Power-Fail Comparator
♦ Independent Watchdog with 1.56sec Timeout
MAX814 MAX815 MAX816
♦ Power-Supply Glitch Immunity
✔ ✔ ✔ ♦ 8-Pin SO and DIP Packages
VCC Reset Voltage
K, L, N, T
K, L, N, T Adjustable
0°C to +70°C
*The MAX814/MAX815 offer a choice of reset threshold voltages.
From the Reset Trip Threshold table, select the suffix corre-
sponding to the desired threshold and insert it into the blank to
complete the part number.
Devices are available in both leaded and lead-free packaging.
Specify lead free by adding the + symbol at the end of the part
number when ordering.
Critical µP Power Monitoring
Ordering Information continued at end of data sheet.
Reset Trip Thresholds table appears at end of data sheet.
6 LOW LINE
6 RESET IN
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.