MAX8213ACSE+

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MAX8213ACSE+ is a member of Maxim Integrated’s Supervisor and Voltage Detector family of devices. This voltage supervisor IC provides microprocessor (µP) reset and system monitoring functions. It is designed to detect and flag undervoltages and overvoltages, and to provide a reset signal to the microprocessor when used. This IC offers a 5ms max reset delay, wide operating temperature range (from -40°C to +85°C) and adjustable threshold voltage.

Typical Application

The MAX8213ACSE+ IC is typically used on low-voltage power systems such as computers, telecommunications systems, and consumer electronics to provide system monitoring and reset functions for centralized control. It is commonly found in integrated power supply control circuits, as well as in portable systems powered by Li-ion, Li-polymer or single-cell NiMH batteries.

Working Principle

The MAX8213ACSE+ IC monitors an external power supply voltage input of up to 5V from a single 5V supply or two separate supplies. The voltage supervisor detects undervoltage and overvoltage conditions, and asserts a reset signal to the microprocessor system to ensure reliable and uninterrupted operation. The reset threshold voltage is adjustable via an external resistor, allowing flexibility when used in different operating environments.

The IC includes a manual reset input, allowing for an external reset to be applied. Its active-low RESET output is fully compatible with all microprocessors and can drive either a CMOS or TTL circuit. It also provides active-high, push-pull SYSRESET# outputs, allowing the microprocessor to detect that a reset signal has been asserted. Additionally, its active-low OV output will remain active when an overvoltage condition is detected and can be used to signal an external device.

Conclusion

The MAX8213ACSE+ is a cost-effective and reliable device used to provide system reset and protect against overvoltage and undervoltage conditions. It is a versatile IC suitable for a wide variety of applications and offers adjustable reset thresholds, a manual reset input, and active-low outputs compatible with most microprocessors on the market.

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