Part # MAX792-MAX820T datasheet

Part Manufacturer: Maxim

Maxim

Part Description: MAX792 DS


Part Details:

19-0147; Rev. 4; 11/05 Microprocessor and Nonvolatile Memory Supervisory Circuits MAX792/MAX820 General Description Features The MAX792/MAX820 microprocessor (µP) supervisory Manual-Reset Input circuits provide the most functions for power-supply 200ms Power-OK/Reset Time Delay and watchdog monitoring in systems without batterybackup. Built-in features include the following: Independent Watchdog Timer--Preset or Adjustable · µP reset: Assertion of RESET and RESET outputs during On-Board Gating of Chip-Enable Signals power-up, power-down, and brownout conditions. Memory Write-Cycle Completion RESET is guaranteed valid for VCC down to 1V. 10ns (max) Chip-Enable Gate Propagation Delay · Manual-reset input. Voltage Monitor for Overvoltage Warning · Two-stage power-fail warning: A separate low-line ±2% Reset and Low-Line Threshold Accuracy comparator compares VCC to a preset threshold (MAX820, external programming mode) 120mV above the reset threshold; the low-line andreset thresholds can be programmed externally. Ordering Information · Watchdog fault output: Assertion of WDO if the watchdog PART** TEMP. RANGE PIN-PACKAGE input is not toggled within a preset timeout MAX792_CPE 0°C to +70°C 16 Plastic DIP period. MAX792_CSE 0°C to +70°C 16 Narrow SO · Pulsed watchdog output: Advance warning of MAX792_C/D 0°C to +70°C Dice* impending WDO assertion from watchdog timeout that Ordering Information continued at end of data sheet. causes hardware shutdown. * Dice are tested at TA = +25°C, DC parameters only. · Write protection of CMOS RAM, EEPROM, or other **These parts offer a choice of five different reset threshold voltages. memory devices. Select the letter corresponding to the desired nominal reset thresholdvoltage and insert it into the blank to complete the part number. The MAX792 and MAX820 are identical, except the Devices in PDIP, SO and µMAX packages are available in both lead- MAX820 guarantees higher low-line and reset threshold ed and lead-free packaging. Specify lead free by adding the + sym- accuracy (±2%).


Please click the following link to download the datasheet:

MAX792-MAX820T.pdf Datasheet