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MAX818M

Maxim
Part Number MAX818M
Manufacturer Maxim
Description +5V Microprocessor Supervisory Circuits
Published May 2, 2005
Detailed Description 19-0494; Rev 1; 3/96 +5V Microprocessor Supervisory Circuits _______________General Description The MAX817/MAX818/MAX81...
Datasheet PDF File MAX818M PDF File

MAX818M
MAX818M

Overview
19-0494; Rev 1; 3/96 +5V Microprocessor Supervisory Circuits _______________General Description The MAX817/MAX818/MAX819 microprocessor (µP) supervisory circuits simplify power-supply monitoring, battery control, and chip-enable gating in µP systems by reducing the number of components required.
These devices are designed for use in +5V-powered systems.
Low supply current (11µA typical) and small package size make these devices ideal for portable applications.
The MAX817/MAX818/MAX819 are specifically designed to ignore fast transients on VCC.
Other supervisory functions include active-low reset, backupbattery switchover, watchdog input, battery freshness seal, and chip-enable gating.
The Selector Guide below lists the specific functions available from each device.
These devices offer two pretrimmed reset threshold voltages for ±5% or ±10% power supplies: 4.
65V for the L versions and 4.
40V for the M versions.
The MAX817/ MAX818/MAX819 are available in space-saving µMAX packages, as well as 8-pin DIP/SO.
____________________________Features o Precision Supply-Voltage Monitor: 4.
65V (MAX81_L) 4.
40V (MAX81_M) o 11µA Quiescent Supply Current o 200ms Reset Time Delay o Watchdog Timer with 1.
6sec Timeout (MAX817/MAX818) o Battery-Backup Power Switching; Battery Voltage Can Exceed VCC o Battery Freshness Seal o On-Board, 3ns Gating of Chip-Enable Signals (MAX818) o Uncommitted Voltage Monitor for Power-Fail or Low-Battery Warning (MAX817/MAX819) o Manual Reset Input (MAX819) MAX817L/M, MAX818L/M, MAX819L/M* _____________________Selector Guide FEATURE Active-Low Reset Backup-Battery Switchover Power-Fail Comparator Watchdog Input Battery Freshness Seal Manual Reset Input Chip-Enable Gating Pin-Package — — — — — — MAX817 L/M MAX818 L/M MAX819 L/M ______________Ordering Information PART† MAX817_CPA MAX817_CSA MAX817_CUA TEMP.
RANGE 0°C to +70°C 0°C to +70°C 0°C to +70°C PIN-PACKAGE 8 Plastic DIP 8 SO 8 µMAX Ordering Information continued on last page.
†These parts offer...


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