LTC699CN8#PBF

Supervisors Overview

The LTC699CN8#PBF is a microprocessor supervisory circuit manufactured by Analog Devices Inc. It operates within a supply voltage range of 2.25 V to 5.5 V and draws a maximum quiescent current of 10 µA. The device features a fixed reset threshold voltage of 4.65 V with a typical accuracy of ±1%. It provides a single active-low open-drain reset output and includes a programmable watchdog timer with a timeout period ranging from 140 ms to 1.28 s. The component is rated for operation across an industrial temperature range of -40°C to +85°C and is housed in an 8-lead SOIC package.

Supervisors Feature Summary

• Integrates a watchdog timer function with selectable timeout intervals for system monitoring
• Provides a dedicated active-low reset signal triggered by under-voltage conditions
• Features low power consumption suitable for battery-operated applications
• Includes internal hysteresis on the reset threshold to prevent false triggering

Supervisors Applications

• Microcontroller system supervision
• Watchdog timer implementation
• Power management monitoring circuits
• Industrial control system reset logic

Supervisors Procurement Notes

Verify the specific suffix CN8 against the manufacturer's official datasheet to confirm the package type and temperature grade. Ensure the part number matches the exact electrical specifications required for your design, as minor variations exist within the product family. Cross-reference the ordering information with authorized distributors to confirm availability and authenticity before procurement.

Supervisors Selection Notes

Select this component when a combined supervisor and watchdog timer is required in a compact surface-mount package. Consider the 4.65 V threshold relative to your system's nominal voltage to ensure proper reset assertion during brown-out events. Evaluate the watchdog timeout requirements against your processor's instruction cycle speed to determine if the available timing options are sufficient for reliable fault detection.

Supervisors Part Context

This part belongs to the LTC699 series of supervisory circuits designed for monitoring power supplies and controlling reset signals. It serves as a critical reliability component in embedded systems, ensuring that processors recover correctly from power failures or software hangs. The series offers various packages and thresholds to accommodate different voltage domains and form factor constraints.

Supervisors Replacement Considerations

Potential substitutes include the LTC699CS8#PBF for a commercial temperature grade variant or the LTC699IS8#PBF for an extended industrial grade option. Other compatible parts in the same family may offer different reset thresholds or package styles while maintaining similar functional characteristics.