ADM8691: µP Supervisory Circuit
The ADM8690–ADM8695 family of supervisory circuits offers complete single chip solutions for power supply monitoring and battery control functions in microprocessor systems. These functions include ...More
ADM8691: µP Supervisory Circuit
Product Description
The ADM8690–ADM8695 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 complete family provides a variety of configurations to satisfy most microprocessor system requirements.
The ADM8690, ADM8692 and ADM8694 are available in 8-pin DIP packages and provide:
- Power-on reset output during power-up, power-down and brownout conditions. The RESET output remains operational with VCC as low as 1 V.
- Battery backup switching for CMOS RAM, CMOS microprocessor or other low power logic.
- A reset pulse if the optional watchdog timer has not been toggled within a specified time.
- A 1.3 V threshold detector for power fail warning, low battery detection or to monitor a power supply other than +5 V.
The ADM8691, ADM8693 and ADM8695 are available in 16-pin DIP and small outline packages (including TSSOP) and provide three additional functions:
- Write protection of CMOS RAM or EEPROM.
- Adjustable reset and watchdog timeout periods.
- Separate watchdog timeout, backup battery switchover, and low VCC status outputs.
- Data Sheet Rev A, 09/2006 (pdf 471kB)
- (About Data Sheets)
Diagrams
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- Symbols and Footprints
Functional Block Diagram for ADM8691
µP Supervisory Circuit
Functional Block Diagram for ADM8691
AD5100 - System-Management IC with Programmable Quad Voltage Monitoring and Supervisory Functions
| 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 | Yes | 100, 1,600, adj. | DIP, SOIC | Microprocessor Supervisor w/ Watchdog Timer, Reset Generator and Battery Steering | $2.73 |