onsemi

MC34161DR2

MC34161DR2 Description

The MC34161DR2 from onsemi is a dual-voltage supervisor IC designed for precision monitoring of power supply voltages in electronic systems. Packaged in an 8-SOIC surface-mount form factor, this obsolete but reliable component features an adjustable/selectable voltage threshold for flexible configuration across various applications. With two independent voltage monitoring channels, it ensures robust system protection by triggering an open-drain/open-collector output when voltages deviate from set thresholds. Operating within a 0°C to 70°C temperature range, it is suitable for commercial-grade environments.

MC34161DR2 Features

• Dual-Channel Monitoring: Simultaneously supervises two voltage rails, enhancing system reliability.
• Adjustable Thresholds: Supports customizable trip points via external resistors, enabling versatility across designs.
• Open-Drain Output: Facilitates easy interfacing with microcontrollers or logic circuits for fault signaling.
• Surface-Mount Design: Compact 8-SOIC package (Tape & Reel) ideal for space-constrained PCBs.
• Commercial Temperature Range: Optimized for 0°C to 70°C operation in industrial/consumer applications.
• Low Sensitivity to Moisture: MSL 1 (Unlimited) rating simplifies storage and handling.

MC34161DR2 Applications

• Power Supply Sequencing: Ensures orderly startup/shutdown in multi-rail systems (e.g., FPGAs, DSPs).
• Battery-Powered Devices: Monitors undervoltage conditions in portable electronics to prevent data corruption.
• Industrial Control Systems: Safeguards PLCs and motor drives by detecting voltage anomalies.
• Automotive Electronics: Auxiliary voltage supervision in infotainment or ADAS (within temp limits).
• Embedded Systems: Provides fail-safe monitoring for IoT devices and edge computing hardware.

Conclusion of MC34161DR2

While marked obsolete, the MC34161DR2 remains a pragmatic choice for legacy designs requiring dual-voltage supervision with adjustable thresholds. Its open-drain output and compact packaging offer design flexibility, though newer alternatives may be preferred for extended temperature or advanced features. Ideal for cost-sensitive, commercial-grade applications where proven performance outweighs obsolescence risks.

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