ADM693A:  µP Supervisor with Backup Battery Switchover, Watchdog Feature, Power Fail Warning, 4.4V Threshold Voltage, 250mA Output Current

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 ...More

ADM693A:  µP Supervisor with Backup Battery Switchover, Watchdog Feature, Power Fail Warning, 4.4V Threshold Voltage, 250mA Output Current

Product Description

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 mP 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 micro-processor 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.

Features

  • Low Power Consumption
  • Precision Voltage Monitor
  • ±2% Tolerance on ADM800L/M
  • Reset Time Delay—200 ms, or Adjustable
  • 1 µA Standby Current
  • Automatic Battery Backup Power Switching
  • Fast Onboard Gating of Chip Enable Signals
  • Also Available in TSSOP Package (ADM691A)

Diagrams

  • Enlarge
  • Symbols and Footprints
ADM693A Diagram
Functional Block Diagram for ADM693A

Specifications

Typ Watchdog Timeout (ms) 100,1600,adj.
Batt-Backup-Flg Yes
Chip Enable Gating Yes
Package DIP,SOIC
Reset Threshold Summary 4.4V
Reset Output-Stage Active-High/Open-Drain,Active-Low/Push-Pull
Min Reset Timeout (ms) 140 (Adjustable)
Backup-Battery Switch Yes

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Part# Reset Threshold Summary Min Reset Timeout (ms) Reset Output-Stage Backup-Battery Switch Chip Enable Gating Typ Watchdog Timeout (ms) Package Product Description Price* (1000-4999)
ADM8696 1.3V 35 (Adjustable) Active-High/Push-Pull, Active-Low/Push-Pull Yes --- 100, 1,600, adj. DIP, SOIC, SOP µP Supv w/ Backup Batt Switch, Adj Low Line V Monitor, Adj Watchdog Timer, Pwr Fail& Watchdog Status $2.72
ADM8697 1.3V 35 (Adjustable) Active-High/Push-Pull, Active-Low/Push-Pull No Yes 100, 1,600, adj. DIP, SOIC, SOP µP Supv w/ CE Inputs, Adj Low Line V Monitor, Adj Watchdog Timer; Low Line, Pwr Fail&Watchdog Status $2.72
ADM696 1.3V (Adjustable) 35 Active-High/Push-Pull, Active-Low/Push-Pull Yes --- 100, 1,600, adj. DIP, SOIC µP Supv w/ Backup Battery Switchover, Adj Low Line V Monitor, Adj Watchdog Timer, 100 mA Iout $2.63
ADM697 1.3V (Adjustable) 35 Active-High/Push-Pull, Active-Low/Push-Pull No Yes 100, 1,600, adj. DIP, SOIC µP Supv with CE Inputs, Adj Low Line V Monitor, Adj W-dog Timer, Low Line, Pwr Fail & W-dog Status $2.63
ADM692 4.4V 35 Active-Low/Push-Pull Yes --- 100, 1,600, adj. DIP µP Supervisor with Backup Battery Switchover, Watchdog, Power Fail Warning, Reset Generator $2.42
ADM692A 4.4V 140 Active-Low/Push-Pull Yes --- 1,600 DIP, SOIC µP Supervisor w/ Battery Steering, Watchdog, Pwr Fail Warning, Active Low Reset, 250mA Iout $1.68
ADM693 4.4V 35 (Adjustable) Active-High/Push-Pull, Active-Low/Push-Pull Yes Yes 100, 1,600, adj. DIP, SOIC µP Supervisor with Backup Battery Switchover, Watchdog, Pwr Fail Warning, 4.4V Threshold, 100mA $2.73
ADM693A 4.4V 140 (Adjustable) Active-High/Open-Drain, Active-Low/Push-Pull Yes Yes 100, 1,600, adj. DIP, SOIC µP Supervisor w/ Backup Battery Switchover, Watchdog, Pwr Fail Warning, 4.4V Threshold, 250mA Iout $1.85
ADM8692 4.4V 35 Active-Low/Push-Pull Yes --- 100, 1,600 DIP, SOIC µP Supv w/ Backup Battery Switch, Watchdog, Power Fail Flag, 4.4V Vth, Active Low Reset, 100mA Iout $2.72
ADM8693 4.4V 35 (Adjustable) Active-High/Push-Pull, Active-Low/Push-Pull Yes Yes 100, 1,600, adj. DIP, SOIC, SOP µP Supervisor w/ Backup Battery Switching, Watchdog, Pwr Fail Flag, 4.4V Vth, 100mA Iout $2.72
ADM800 4.4V & 4.65V 140 (Adjustable) Active-High/Open-Drain, Active-Low/Push-Pull Yes Yes 100, 1,600, adj. DIP, SOIC µP Supv w/ Backup Battery Switchover, Adj Reset &Watchdog Periods, CE Inputs, 4.4V/4.65V Threshold $2.33
ADM802 4.4V & 4.65V 140 Active-Low/Push-Pull Yes --- 1,600 DIP, SOIC µP Supv w/ Backup Battery Switchover, Power Fail Flag, 4.4V/4.65V Threshold, 250mA Output Current $2.23
ADM805 4.4V & 4.65V 140 Active-High/Push-Pull Yes --- 1,600 DIP, SOIC µP Supv w/ Backup Battery Switchover, Watchdog, Power Fail Flag, 4.4V/4.65V Threshold, 250mA Iout $2.23
ADM690 4.65V 35 Active-Low/Push-Pull Yes --- 100, 1,600 DIP Supervisory Circuit w/ 4.65V Reset, Battery Switchover, Watchdog Timer, Power Fail Input $2.42
ADM690A 4.65V 140 Active-Low/Push-Pull Yes --- 1,600 DIP, SOIC, SOP µP Supervisor with Backup-Battery Switchover, Watchdog Feature, Power-Fail Warning, 4.65V Threshold $1.52
ADM691 4.65V 35 (Adjustable)