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:
- Power-on reset output during power-up, power-down and brownout conditions. The circuitry remains operational with VCC as low as 1 V.
- Battery backup switching for CMOS RAM, CMOS micro-processor or other low power logic.
- A reset pulse if the optional watchdog timer has not been toggled within a specified time.
- A 1.25 V threshold detector for power fail warning, low battery detection, or to monitor a power supply other than +5 V.
- Data Sheet Rev 0, 09/2002 (pdf 339kB)
- (About Data Sheets)
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
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- Symbols and Footprints
Functional Block Diagram for ADM693A
µP Supervisor with Backup Battery Switchover, Watchdog Feature, Power Fail Warning, 4.4V Threshold Voltage, 250mA Output Current
Functional Block Diagram for ADM693A
| 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) | Active-High/Push-Pull, Active-Low/Push-Pull | Yes |