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The XC61CC4802MR is a voltage detector IC manufactured by TOREX Semiconductor Ltd. Below are the key specifications, descriptions, and features:

Specifications

• Manufacturer: TOREX
• Part Number: XC61CC4802MR
• Type: Voltage Detector (Reset IC)
• Detection Voltage: 4.8V (fixed)
• Accuracy: ±2%
• Operating Voltage Range: 1.2V to 10V
• Output Type: CMOS, Active Low (Open Drain)
• Quiescent Current: 1μA (Typical)
• Hysteresis Width: 100mV (Typical)
• Temperature Range: -40°C to +85°C
• Package: SOT-23-5

Descriptions

The XC61CC4802MR is a low-power voltage detector that monitors the supply voltage and provides a reset signal when the voltage drops below the preset threshold (4.8V). It is designed for battery-powered and portable applications requiring reliable power monitoring.

Features

• Ultra-Low Power Consumption: Only 1μA typical current consumption.
• High Accuracy: ±2% detection voltage precision.
• Wide Operating Voltage Range: 1.2V to 10V.
• Built-in Hysteresis: Prevents chattering during voltage fluctuations.
• Open-Drain Output: Allows flexible pull-up voltage selection.
• Small Package: SOT-23-5 for space-constrained designs.
• Lead-Free & RoHS Compliant: Environmentally friendly.

This IC is commonly used in microcontroller reset circuits, power management, battery monitoring, and industrial control systems.

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# XC61CC4802MR: Practical Applications, Design Pitfalls, and Implementation Considerations

## 1. Practical Application Scenarios

The XC61CC4802MR from TOREX is a high-precision voltage detector with a fixed detection threshold of 4.8V, designed for power management in low-power electronic systems. Its primary applications include:

• Battery-Powered Devices: Ensures safe operation by monitoring battery voltage and triggering shutdown or warning signals before undervoltage conditions damage circuitry. Common in portable medical devices, IoT sensors, and wearables.
• Microcontroller Reset Circuits: Provides reliable power-on reset (POR) and brownout protection for microcontrollers, preventing erratic behavior during unstable supply conditions.
• Automotive Electronics: Used in infotainment systems and ECUs to monitor voltage rails, ensuring compliance with automotive power sequencing requirements.
• Industrial Control Systems: Protects PLCs and motor controllers from voltage fluctuations, enhancing system reliability in harsh environments.

The device’s ultra-low current consumption (0.8µA typical) makes it ideal for energy-sensitive applications, while its small package (SOT-23) suits space-constrained designs.

## 2. Common Design Pitfalls and Avoidance Strategies

Pitfall 1: Incorrect Threshold Selection

The XC61CC4802MR has a fixed threshold (4.8V). Designers may mistakenly use it in systems where a different voltage level is required, leading to premature or delayed detection.

Solution: Verify system voltage requirements before selection. If adjustable thresholds are needed, consider alternative detectors like the XC61CN series.

Pitfall 2: Poor PCB Layout Causing False Triggers

Noise coupling into the detector’s input can cause false resets. This is common in high-frequency or mixed-signal designs.

Solution:

• Place the detector close to the power source with short, direct traces.
• Use a 0.1µF bypass capacitor near the VDD pin to suppress noise.
• Avoid routing detector traces near high-speed signals.

Pitfall 3: Overlooking Output Configuration

The XC61CC4802MR has an open-drain output, requiring an external pull-up resistor. Omitting this resistor results in a non-functional output stage.

Solution: Include a 10kΩ–100kΩ pull-up resistor tied to the logic supply voltage. Ensure the resistor value aligns with the system’s speed and power constraints.

## 3. Key Technical Considerations for Implementation

• Supply Voltage Range: Operates from 1.2V to 6.0V, but the detection threshold is fixed at 4.8V. Ensure compatibility with the system’s operating range.
• Temperature Stability: The detector’s accuracy (±2%) is maintained across -40°C to +85°C, making it suitable for industrial and automotive applications.
• Output Delay Characteristics: The built-in delay time (typically 200ms) prevents false triggers during transient voltage dips. For faster response, consider adding an external RC circuit.

By addressing these factors, designers can maximize the reliability and performance of the XC61CC4802MR in their applications.