Part Number: MC33161DMR2G

Manufacturer: onsemi


Shipped from: Shenzhen/HK Warehouse

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Technical Specifications of MC33161DMR2G

Datasheet  MC33161DMR2G datasheet
Category Integrated Circuits (ICs)
Family PMIC – Supervisors
Manufacturer ON Semiconductor
Packaging Tape & Reel (TR)
Part Status Active
Type Multi-Voltage Supervisor
Number of Voltages Monitored 2
Output Open Drain or Open Collector
Reset Timeout
Voltage – Threshold Adjustable/Selectable
Operating Temperature -40°C ~ 105°C (TA)
Mounting Type Surface Mount
Package / Case 8-TSSOP, 8-MSOP (0.118″, 3.00mm Width)
Supplier Device Package Micro8?


The MC33161DMR2G is a versatile voltage monitoring device that was designed to fulfill the needs of a wide range of voltage sensing applications. This component provides an efficient and cost-effective option for identifying whether a voltage is positive or negative. In this detailed lesson, we will look at the MC33161DMR2G’s characteristics, applications, and operation, providing critical insights for circuit designers, engineers, and amateurs alike.

Key Features

Customize voltage detection parameters with the Mode Select Input, offering versatility for various applications.

  • Versatile Voltage Detection: For over, under, and window voltage detection, configure each comparator channel as inverting or noninverting to accommodate a wide range of circumstances.
  • Positive and Negative Voltage Detection: Monitor both positive and negative voltages to ensure total voltage control.
  • Wide Operating Voltage Range: This voltage monitor is fully functional at 2.0 V for positive voltage sensing and 4.0 V for negative voltage sensing, making it suited for a variety of voltage monitoring activities.
  • 54 V Reference with Current Limit Protection: A pinned-out 2.54 V reference with current limit protection is included for accurate voltage referencing and increased safety.
  • Low Standby Current: Reduces power usage while voltages are not actively monitored, boosting energy efficiency.
  • Open Collector Outputs: This device has open collector outputs that may sink more than 10 mA, increasing device flexibility and incorporation into numerous circuit designs.
  • Automotive Application: Suitable for automotive and other applications requiring special site and control change needs, AEC-Q100 compliance, and PPAP capability for automotive system reliability.
  • Environmental Responsibility: Pb-free and RoHS compliant, in accordance with modern environmental protection and sustainability regulations.

These characteristics combine to make the MC33161DMR2G a versatile and dependable component for voltage monitoring in a variety of industries and applications.


The MC33161DMR2G finds its application in a multitude of industries and scenarios:

  1. Appliance:It can be used for monitoring and controlling voltage levels in various household appliances, ensuring their safe and efficient operation.
  2. Automotive:In automotive systems, this device plays a crucial role in monitoring both positive and negative voltages, contributing to vehicle safety and performance.
  3. Consumer Electronics:From mobile devices to power supplies, the MC33161DMR2G enhances the reliability of consumer electronics by providing voltage monitoring capabilities.
  4. Industrial Equipment:Industrial machinery often relies on precise voltage control. This component ensures that critical voltage thresholds are maintained, preventing damage or malfunction.

Functional Description

To be successful in the market for electronic equipment today, new circuits must be made to make systems more reliable while adding as little cost as possible. The circuit designer can get a long way toward achieving these goals by putting in place inexpensive circuitry that constantly checks key circuit voltages and sends a fault signal if something goes wrong. The MC34161, MC33161 models are all-purpose voltage monitors that can be used for a wide range of voltage sensing tasks.

The main goal of this series was to set up a device that can be used in as many voltage sense tasks as possible while keeping costs as low as possible. The goal of flexibility is met by using a unique Mode Select input along with standard circuit building blocks. The cost goal is met by using a standard Bipolar Analog flow to handle the device and keeping the package to eight pins. The device has two comparator channels, each with hysteresis, a pinned-out reference, a mode select input for channel programming, and two open collector outputs. The Mode Select input can be used to set up each comparison channel to either invert or not invert.

This means that a single device can identify positive and negative voltages over, under, and in a window.

● Input Comparators

Each channel’s input comparators are similar, with an upper threshold voltage of 1.27 V 2.0% and a hysteresis of 25 mV. Hysteresis is used to improve output switching by eliminating oscillations when the comparator thresholds are crossed. At their threshold, the comparators have an input bias current of 60 nA, which is equivalent to a 21.2 M resistor to ground.

This high impedance reduces external voltage divider burden for well-defined trip points. At a VCC of 2.0 V, both comparator channels are fully functioning for all positive voltage sensing applications. Additional circuitry was integrated into the inputs to avoid device latchup and to inhibit electrostatic discharges (ESD) in order to provide better device robustness for adverse industrial situations.

● Reference

Pins on the 2.54 V reference have been removed to allow input comparators to sense negative voltages and the Mode Select input to be configured for window detection applications. Furthermore, the input comparators can now detect positive voltages. The reference has built-in short circuit protection and can deliver more than 2.0 mA of output current. Its current-sourcing capability is greater than 2.0 mA. When tested at room temperature, the output voltage has a certified tolerance of 2.4%. The internal reference of 1.27 V is multiplied by a factor of two to yield the reference value of 2.54 V. At a power supply voltage of 4.0 V, the 2.54 V reference is fully regulated, allowing the device to read negative voltages with confidence.

● Output Stage

The output stage employs a positive feedback base boost circuit to improve sink saturation while keeping the device standby current low. This device can detect positive voltages at a VCC of 1.0 V by combining low output saturation characteristics with low voltage comparator operation. These properties are critical in undervoltage sensing applications where the output must remain low as VCC approaches ground.


The MC33161DMR2G provides diverse and cost-effective voltage monitoring solutions. Its unique features, wide voltage range, and dependability make it indispensable for engineers and designers. The MC33161DMR2G ensures constant performance whether monitoring positive or negative voltages, adjusting detecting modes, or assuring standard compliance. Its devotion to sustainability, as seen by lead-free and RoHS compliance, adds to its allure. Incorporate it into your designs for improved voltage control. Contact ICRFQ for further information and orders, ensuring high-quality components at low rates. Improve your voltage monitoring with the MC33161DMR2G now.

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Kevin Chen