ADM8690/ADM8691/ADM8695: Microprocessor Supervisory Circuits Data Sheet (Rev. C)12/2/2011357 kB
Features and Benefits
- High current drive: 100 mA
- Watchdog timer: 100 ms, 1.6 sec, or adjustable
- Standby current: 400 nA
- Automatic battery backup power switching
- Extremely fast gating of chip enable signals (3 ns)
- Voltage monitor for power fail
- Available in TSSOP package
The ADM8690 / ADM8691 / ADM8695 supervisory circuits offer complete single-chip solutions for power supply monitoring and battery control functions in microprocessor systems. These functions include microprocessor 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 / ADM8691 / ADM8695 are fabricated using an advanced epitaxial CMOS process that combines low power consumption (0.7 mW), extremely fast chip enable gating (3 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
The ADM8690 is available in 8-lead PDIP and SOIC packages and provides the following functions:
- 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 and ADM8695 are available in 16-lead PDIP 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.
- Microprocessor systems
- Intelligent instruments
- Automotive systems
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Documentation & Resources
Supervisory Devices Complementary Parts Guide for Altera FPGAs2/26/2009664 kB
Supervisory Devices Complementary Parts Guide for Xilinx FPGAs2/26/2009661 kB
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.
|Part Number||Material Declaration||Reliability Data||Pin/Package Drawing||CAD Symbols, Footprints & 3D Models|
|ADM8691ANZ||Material Declaration||Reliability Data||16-Lead PDIP|
|ADM8691ARNZ||Material Declaration||Reliability Data||16-Lead SOIC|
|ADM8691ARWZ||Material Declaration||Reliability Data||16 ld SOIC|
|Wafer Fabrication Data|
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