ADM691 Microprocessor Supervisor with Backup Battery Switchover, 50 ms Nominal Adjustable Reset Period, Adjustable Watchdog Period, Chip Enable Signals, 4.65V Threshold Voltage, Watchdog, Backup Battery and Low VCC Status O/Ps and 100mA Output Current

The ADM690-ADM695 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 complete family provides a variety of configurations to satisfy most microprocessor system requirements.

The ADM690, ADM692 and ADM694 are available in 8-pin DIP packages and provide:

The ADM691, ADM693 and ADM695 are available in 16-pin DIP and small outline packages and provide three additional functions.

The ADM690-ADM695 family is fabricated using an advanced epitaxial CMOS process combining low power consumption (5 mW), extremely fast Chip Enable gating (5 ns) and high reliability. RESET assertion is guaranteed with VCC as low as 1 V. In addition, the power switching circuitry is designed for minimal voltage drop thereby permitting increased output current drive of up to 100 mA without the need for an external pass transistor.

Features and Benefits
  • Superior Upgrade for MAX690–MAX695
  • Specified Over Temperature
  • Low Power Consumption (5 mW)
  • Precision Voltage Monitor
  • Reset Assertion Down to 1 V VCC
  • Low Switch On-Resistance 1.5 O Normal, 20 O in Backup
  • High Current Drive (100 mA)
  • Watchdog Timer—100 ms, 1.6 s, or Adjustable
  • 600 nA Standby Current
  • Automatic Battery Backup Power Switching
  • Extremely Fast Gating of Chip Enable Signals (5 ns)
  • Voltage Monitor for Power Fail
Power Management
Data Sheets
Documentnote
ADM690-ADM695: Microprocessor Supervisory Circuits Data Sheet (Rev. A)PDF 285 kB
Order Information
Part NumberPackagePacking QtyTemp RangePrice 100-499Price 1000+RoHS
ADM691AN Last Time Buy16 ld PDIPOTH 25-40 to 85C3.643.16N
ADM691ANZ Production16 ld PDIPOTH 25-40 to 85C3.162.73Y
ADM691AQ Last Time Buy16 ld CerDIPOTH 25-40 to 85C6.135.21N
ADM691AR Production16 ld SOIC - WideOTH 47-40 to 85C3.893.29N
ADM691AR-REEL Production16 ld SOIC - WideREEL 1000-40 to 85C03.29N
ADM691ARZ Production16 ld SOIC - WideOTH 47-40 to 85C3.372.84Y
ADM691ARZ-REEL Production16 ld SOIC - WideREEL 1000-40 to 85C02.84Y
ADM691ARZ-REEL7 Production16 ld SOIC - WideREEL 400-40 to 85C02.84Y
ADM691SQ Production16 ld CerDIPOTH 25-55 to 125C7.266.2N
Reference Materials
ADM690-ADM695: Microprocessor Supervisory Circuits Data Sheet (Rev. A) adm690
Supervisory Devices Complementary Parts Guide for Altera FPGAs adm690
Supervisory Devices Complementary Parts Guide for Xilinx FPGAs adm690
Voltage Monitoring Products Applications Guide adm6317