Analog Devices Inc./Maxim Integrated MAX8211IPA

Overview

MAX8211IPA from Maxim Integrated is a CMOS micropower voltage detector IC designed for microprocessor power-fail warning and undervoltage monitoring. It features a 1.15V internal bandgap reference, open-drain N-channel output with 7mA current limiting, ±40mV threshold accuracy, and operates across a 2.0V to 16.5V supply range. It is used in logic-supply undervoltage detection circuits where precise trip-point control and low quiescent current (5µA) are critical.

For engineers reviewing the MAX8211IPA datasheet, MAX8211IPA pinout, MAX8211IPA application, or MAX8211IPA equivalent, this device serves as a plug-in replacement for ICL8211 in ≤16.5V systems-offering improved reference stability, lower supply current, and programmable hysteresis via external resistor networks.

Technical Context

The MAX8211IPA implements a comparator-based voltage detection architecture with an integrated 1.15V bandgap reference and open-drain N-channel output stage. Its THRESH pin accepts a scaled-down version of the monitored voltage, and the output asserts low when THRESH falls below the reference-enabling precise undervoltage detection.

Hysteresis is implemented via an open-drain P-channel HYST output that feeds positive feedback through an external resistor (R3), eliminating noise-induced chatter. The device supports both DIP-8 packaging and industrial temperature operation (–20°C to +85°C), with guaranteed performance over its full supply range and specified leakage (<1µA at THRESH).

Key Specifications

Pinout & Package

MAX8211IPA is housed in an 8-pin plastic DIP package (P8-1* drawing), with lead spacing of 0.300", body width 0.355", and standard through-hole mounting. Pin 1 is bottom-left corner when notch faces up.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar voltage detection applications.

Compared with MAX8211CSA, MAX8211IPA offers broader temperature coverage and through-hole assembly; versus TLV803DBZT, it delivers programmability, hysteresis control, and higher drive strength-making it suitable for robust industrial monitoring where adaptability and reliability are essential.

Availability

MAX8211IPA is available at Aetrix Electronics and suitable for industrial power-supply fault monitoring, battery-backed memory retention, and logic-supply undervoltage detection requiring stable component supply across extended temperature ranges.

Supply support for MAX8211IPA includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Maxim Integrated (now part of Analog Devices) designs precision analog and mixed-signal ICs for industrial, automotive, and communications applications, with emphasis on power management and sensing.

The MAX8211 product line targets high-reliability voltage monitoring in embedded systems-delivering programmable, low-power, and temperature-stable solutions for microprocessor supervision and power-rail integrity assurance.

FAQ

What is the exact threshold reference voltage of the MAX8211IPA?

The MAX8211IPA uses an internal 1.15V bandgap reference with ±40mV (±3.5%) accuracy over temperature and supply voltage. This value is confirmed in the Electrical Characteristics table under "Threshold Trip Voltage (V_TH)" at V+ = 5V and T_A = +25°C. The reference remains stable across the full operating range, enabling repeatable trip-point design using external resistor dividers.

Can the MAX8211IPA be used for overvoltage detection?

No-the MAX8211IPA is configured exclusively for undervoltage detection: its output asserts low when the THRESH pin voltage falls *below* the 1.15V internal reference. For overvoltage detection, the MAX8212 variant must be used, as it triggers when THRESH exceeds the reference. Attempting overvoltage use with MAX8211IPA will result in inverted or non-functional behavior.

Does the MAX8211IPA require an external pull-up resistor on the OUT pin?

Yes-the MAX8211IPA features an open-drain N-channel output (OUT), which can only sink current. An external pull-up resistor to a logic-compatible voltage (e.g., 3.3V or 5V) is mandatory to establish a valid HIGH state. Typical values range from 10kΩ to 100kΩ depending on rise-time and bus loading requirements.

What is the maximum allowable supply voltage for the MAX8211IPA?

The absolute maximum supply voltage for the MAX8211IPA is +18V, but its guaranteed operating range is 2.0V to 16.5V per the datasheet's "Guaranteed Operating Supply Voltage Range" specification. Operation above 16.5V risks violating functional limits-even if within absolute max ratings-and is not supported for reliable long-term use.

How does the HYST pin function in the MAX8211IPA?

The HYST pin is an open-drain P-channel output that activates when THRESH > 1.15V. It sinks current into the resistor divider network (e.g., R3 in Figure 3), raising the effective THRESH voltage during rising conditions-creating hysteresis. This prevents output oscillation due to noise or slow-rising/falling supply edges, with magnitude set by R3 value and V+.