Linear Technology LTC695CSW: A Robust Microprocessor Supervisory Circuit

The LTC695CSW from Linear Technology is a high-performance microprocessor supervisory circuit designed to maintain system integrity during power failures or unexpected system shutdowns. This critical component is engineered to monitor power supplies in microprocessor and digital systems, providing a reliable solution for a variety of applications including computers, controllers, and intelligent instruments.

Featuring a precise 4.65V voltage monitor, the LTC695CSW ensures that the connected microprocessor is reset to a known state during power-up, power-down, and brownout conditions. This reset function is maintained active until the supply voltage reaches a stable and safe operating level, and for a minimum of 200ms after that, guaranteeing a proper system restart.

The LTC695CSW is also equipped with a watchdog timer that can be set by an external capacitor, providing an additional layer of system reliability. This timer periodically checks for system malfunctions. If the microprocessor fails to provide a periodic reset pulse to the LTC695CSW, the device will issue a system reset, ensuring that the system can recover from a software lock-up or other faults.

The device comes in a 16-pin narrow SOIC package, making it suitable for space-constrained applications. Its operating temperature range from 0°C to 70°C allows for deployment in various environments without compromising performance. The LTC695CSW also features a low supply current of 35µA, which makes it an energy-efficient choice for battery-powered systems.

Integration of the LTC695CSW into a system design is straightforward, thanks to its minimal external component requirement. This ease of use, combined with its robust feature set, makes the LTC695CSW an ideal choice for system engineers looking to enhance the reliability and performance of their microprocessor-based systems.

In summary, the LTC695CSW from Linear Technology is a versatile and reliable solution for supervising microprocessor systems. Its precise monitoring capabilities, integrated watchdog timer, and low power consumption make it an invaluable component for ensuring the stability and safety of electronic systems.