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ADM800M

Analog Devices
Part Number ADM800M
Manufacturer Analog Devices
Description Microprocessor Supervisory Circuits
Published Mar 23, 2005
Detailed Description a FEATURES Low Power Consumption: Precision Voltage Monitor ؎2% Tolerance on ADM800L/M Reset Time Delay—200 ms, or Adjus...
Datasheet PDF File ADM800M PDF File

ADM800M
ADM800M

Overview
a FEATURES Low Power Consumption: Precision Voltage Monitor ؎2% Tolerance on ADM800L/M Reset Time Delay—200 ms, or Adjustable 1 ␮ A Standby Current Automatic Battery Backup Power Switching Fast Onboard Gating of Chip Enable Signals Also Available in TSSOP Package (ADM691A) APPLICATIONS Microprocessor Systems Computers Controllers Intelligent Instruments Automotive Systems Critical ␮P Power Monitoring Microprocessor Supervisory Circuits ADM691A/ADM693A/ADM800L/M FUNCTIONAL BLOCK DIAGRAM BATT ON 4.
65V1 VCC VOUT VBATT CHIP ENABLE OUTPUT CONTROL CEIN CEOUT LOW LINE OSC IN OSC SEL RESET & WATCHDOG TIMEBASE RESET & GENERATOR RESET RESET WATCHDOG INPUT (WDI) WATCHDOG TRANSITION DETECTOR WATCHDOG TIMER WATCHDOG OUTPUT (WDO) POWER FAIL OUTPUT (PFO) GENERAL DESCRIPTION POWER FAIL INPUT (PFI) 1.
25V The ADM691A/ADM693A/ADM800L/ADM800M family of supervisory circuits offers complete single chip solutions for power supply monitoring and battery control functions in microprocessor systems.
These functions include µP reset, backup-battery switchover, watchdog timer, CMOS RAM write protection, and power-failure warning.
The family of products provides an upgrade for the MAX691A/93A/800M family of products.
All parts are available in 16-pin DIP and SO packages.
The ADM691A is also available in a space-saving TSSOP package.
The following functionality is provided: 1.
Power-on reset output during power-up, power-down and brownout conditions.
The circuitry remains operational with VCC as low as 1 V.
2.
Battery backup switching for CMOS RAM, CMOS microprocessor or other low power logic.
3.
A reset pulse if the optional watchdog timer has not been toggled within a specified time.
4.
A 1.
25 V threshold detector for power fail warning, low battery detection, or to monitor a power supply other than +5 V.
ADM691A/ADM693A ADM800L/ADM800M 1VOLTAGE DETECTOR = 4.
4V (ADM693A/ADM800M) INPUT POWER 7805 +5V 0.
1µF VCC CMOS RAM R1 BATTERY VCC VBATT BAT ON VOUT CEOUT ADDRESS DECODE...


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