SGM812-MXKA4/TR Supervisory Circuits with Manual Reset Input

Product Overview
The SGM812-MXKA4/TR from SGMICRO is a voltage supervisor IC designed for reliable monitoring of power supply voltages and triggering resets when necessary. It directly competes with the ADM812MARTZ and ADM812MARTZ-REEL7 from Analog Devices, which serve similar functions in the power management domain. Both products are designed to ensure that a system is properly reset when the supply voltage falls below a predetermined threshold. However, the SGM812-MXKA4/TR offers several distinct advantages, particularly in power consumption, precision, and cost efficiency.

Power Consumption Efficiency
One of the standout features of the SGM812-MXKA4/TR is its ultra-low quiescent current of 0.5μA, which is substantially lower than the ADM812MARTZ’s typical quiescent current of 12μA. This significant difference in power consumption is critical in battery-operated applications such as portable devices and IoT solutions. The SGM812-MXKA4/TR offers extended battery life, which makes it an ideal choice for low-power, energy-efficient designs that need to conserve power over extended periods.

Voltage Threshold Accuracy
The SGM812-MXKA4/TR provides a tighter voltage threshold accuracy of ±1.5%, which is superior to the ADM812MARTZ’s typical accuracy of ±2.0%. This enhanced precision in the threshold setting ensures that the SGM812-MXKA4/TR can more accurately trigger resets when the supply voltage falls below the set point, leading to better system stability and reduced chances of erratic behavior in power-sensitive applications. Tighter accuracy is particularly important in high-precision systems that require careful monitoring of voltage fluctuations.

Reset Timeout and Output Characteristics
Both the SGM812-MXKA4/TR and ADM812MARTZ feature a push-pull active-low reset output that is highly reliable when the supply voltage falls below the threshold. Both ICs have a typical reset timeout duration of 200ms, which ensures sufficient time for proper system recovery and reset signaling. While both solutions meet the standard reset requirements, the SGM812-MXKA4/TR benefits from its low-power operation, ensuring the reset signal is clean and reliable without introducing unnecessary power draw during the reset process.

Package Compatibility and Pinout
The SGM812-MXKA4/TR and ADM812MARTZ are both available in the SOT-23-3 package, offering the same 3-pin configuration. This makes the SGM812-MXKA4/TR a direct drop-in replacement for the ADM812MARTZ, providing design flexibility for customers looking to switch products without changing their PCB layouts. This compatibility ensures that engineers can choose the SGM812-MXKA4/TR for its improved performance and lower cost without the need for redesign.

Operating Voltage Range
The SGM812-MXKA4/TR operates across a wide voltage range of 1.0V to 5.5V, similar to the ADM812MARTZ. However, the SGM812-MXKA4/TR maintains superior low-voltage performance, making it an excellent choice for 1.8V, 2.5V, and 3.3V systems. It can reliably monitor lower voltage levels, which is particularly beneficial in low-voltage applications or designs with power rails that require strict monitoring for reset conditions.

Cost and Supply Chain Efficiency
Another significant advantage of the SGM812-MXKA4/TR over the ADM812MARTZ is its competitive pricing. The SGM812-MXKA4/TR offers comparable performance at a lower price point, making it an attractive solution for cost-sensitive designs, particularly in high-volume applications. In addition to a favorable cost structure, SGMICRO also provides faster lead times and stronger local technical support, which can significantly reduce development time and ensure a smoother supply chain.

Conclusion
In summary, the SGM812-MXKA4/TR offers several key advantages over the ADM812MARTZ in terms of power consumption, voltage threshold accuracy, cost-effectiveness, and overall performance. With its ultra-low quiescent current, tighter threshold accuracy, and superior value proposition, the SGM812-MXKA4/TR is an excellent choice for designs requiring efficient voltage monitoring, reliable resets, and reduced power draw. Additionally, its compatibility with the ADM812MARTZ makes it an easy alternative for system designers looking to optimize both performance and cost.