LTC690CN8#PBF

Supervisors Overview

The LTC690CN8#PBF is a microprocessor supervisory circuit manufactured by Analog Devices Inc. It provides complete power supply monitoring and battery control functions for microprocessor reset, battery backup, CMOS RAM write protection, power failure warning, and watchdog timing. The device features a precise internal voltage reference and comparator circuit to monitor the power supply line. It guarantees reset assertion at VCC = 1V with a maximum supply current of 1.5mA. The component includes onboard gating of RAM chip enable signals and offers a fast response time with a maximum delay of 35ns. It supports a 4.65V precision voltage monitor and provides adjustable or fixed power OK/reset time delays of 50ms or 200ms. Designed for industrial applications, it operates over a temperature range of -40°C to +85°C and is housed in an 8-DIP package.

Supervisors Feature Summary

• Provides complete power supply monitoring and battery control functions including microprocessor reset and watchdog timing
• Features a precise internal voltage reference and comparator circuit for accurate power line supervision
• Includes onboard gating capability for RAM chip enable signals to protect data integrity
• Guarantees reset assertion at low voltage levels with minimal external component requirements

Supervisors Applications

• Microprocessor reset circuits
• Battery backup systems
• CMOS RAM write protection
• Power failure warning systems
• Watchdog timing applications

Supervisors Procurement Notes

Verify the specific suffix and package configuration against official Analog Devices documentation to ensure compatibility with your design requirements. Confirm that the part number corresponds to the correct temperature grade and packaging style intended for your production needs. Cross-reference the datasheet revision history for any recent updates to electrical characteristics or pinout definitions before finalizing procurement orders.

Supervisors Selection Notes

Select this component when a reliable, low-component-count solution for power supply monitoring is required. It is suitable for designs needing guaranteed reset assertion at low voltages and integrated RAM protection. Consider its operating temperature range and package type to ensure fit within the system constraints. Evaluate its standby current and supply current specifications against power budget requirements.

Supervisors Part Context

The LTC690CN8#PBF belongs to the LTC690 family of microprocessor supervisory circuits from Analog Devices. This family is designed to provide comprehensive power management supervision for digital systems. The CN8 variant specifically denotes the commercial temperature range and the 8-pin DIP package option. It serves as a direct replacement or upgrade for similar legacy supervisory ICs in existing designs requiring robust power monitoring.

Supervisors Replacement Considerations

Public confirmed substitute part numbers include the LTC690CS8#PBF for surface mount applications and other variants within the LTC690 family such as the LTC690MJ8 for ceramic DIP packages. Ensure pin compatibility and electrical parameter alignment when substituting.