The MAX792/MAX820 microprocessor (µP) supervisory circuits provide the most functions for power-supply and watchdog monitoring in systems without battery backup. Built-in features include the following:
µP reset: Assertion of RESET and active-low RESET outputs during power-up, power-down, and brownout
conditions. Active-low RESET is guaranteed valid for VCC down to 1V.
Manual-reset input.
Two-stage power-fail warning: A separate low-line comparator compares VCC to a preset
threshold 120mV above the reset threshold; the low-line and reset thresholds can be programmed externally.
Watchdog fault output: Assertion of active-low WDO if the watchdog input is not toggled within a preset timeout
period.
Pulsed watchdog output: Advance warning of impending active-low WDO assertion from watchdog timeout that
causes hardware shutdown.
Write protection of CMOS RAM, EEPROM, or other memory devices.
The MAX792 and MAX820 are identical, except the MAX820 guarantees higher low-line and reset threshold accuracy (±2%).
Key Features
Applications/Uses
Manual-Reset Input
200ms Power OK/Reset Time Delay
Independent Watchdog Timer-Preset or Adjustable
On-Board Gating of Chip-Enable Signals
Memory Write-Cycle Completion
10ns (max) Chip-Enable Gate Propagation Delay
Voltage Monitor for Overvoltage Warning
±2% Reset and Low-Line Threshold Accuracy (MAX820, external programming mode)
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 prices
and delivery, please see the price and availability page
or contact an authorized distributor.
* Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.
MAX792L
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Package:
TYPE PINS FOOTPRINT
DRAWING CODE/VAR *
Temp
RoHS/Lead-Free? Materials Analysis
MAX792LEJE
Ceramic DIP;16 pin;
Dwg: 21-0045 (PDF)
Use pkgcode/variation: J16-3*
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