Analog Devices Inc./Maxim Integrated MAX8211CTY

Overview

MAX8211CTY from Maxim Integrated is a CMOS micropower voltage detector IC designed for microprocessor power-fail warning and programmable undervoltage/overvoltage monitoring. It features a 1.15V internal bandgap reference, ±40mV threshold accuracy (±3.5%), 5µA quiescent supply current, 7mA current-limited open-drain output sink, and operates across a 2.0V to 16.5V supply range. Used in battery-backup switching and logic-supply undervoltage detection circuits.

For engineers reviewing the MAX8211CTY datasheet, MAX8211CTY pinout, MAX8211CTY application, or MAX8211CTY equivalent, this page delivers verified technical context, TO-99 package mapping, real-world use scenarios, and validated alternative options for voltage-monitoring designs requiring low-power, precision trip-point control and hysteresis-enabled noise immunity.

Technical Context

The MAX8211CTY integrates a precision 1.15V bandgap reference, a high-impedance MOSFET comparator input (THRESH), and an open-drain n-channel output stage with built-in 7mA current limiting. Its hysteresis output (HYST) provides up to 10mA drive capability with ±0.1mV disparity between HYST and THRESH switching thresholds, eliminating chatter in noisy environments.

Unlike the MAX8212, the MAX8211CTY activates its output when the THRESH voltage falls *below* the 1.15V reference - making it inherently suited for undervoltage detection. External resistor dividers define trip points, and hysteresis magnitude is programmable via feedback resistor R3 connected to the HYST pin.

Key Specifications

Pinout & Package

MAX8211CTY is housed in an 8-pin TO-99 metal-can package with case connected to Pin 4 (GND). The package offers hermeticity, low thermal resistance, and EMI shielding ideal for precision analog sensing in noisy industrial environments.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX8211ESA and TLV7031IDBVR, the MAX8211CTY uniquely combines TO-99 reliability, integrated hysteresis drive, and 7mA current-limited output in a single hermetically sealed package - making it optimal for legacy-replacement and mission-critical undervoltage monitoring where board-level robustness is non-negotiable.

Availability

MAX8211CTY is available at Aetrix Electronics and suitable for microprocessor power-fail warning, battery-backup switchover, and logic-supply undervoltage detection requiring stable component supply, long-term obsolescence management, and hermetic packaging integrity.

Supply support for MAX8211CTY 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) is a U.S.-based semiconductor company specializing in precision analog, mixed-signal, and power-management ICs for industrial, communications, and computing applications.

The MAX8211 product line delivers programmable voltage-monitoring solutions optimized for microprocessor supervision, offering low-quiescent-current detection with integrated hysteresis and current-limited outputs in multiple ruggedized packages.

FAQ

What is the primary function of the MAX8211CTY?

The MAX8211CTY is a micropower voltage detector IC that monitors a DC supply voltage and asserts an open-drain output when the monitored voltage falls below a user-programmed threshold. Its core function is undervoltage detection for microprocessor power-fail warning, implemented via a 1.15V internal reference and external resistor divider on the THRESH pin. The MAX8211CTY specifically activates its 7mA current-limited output sink when THRESH drops below 1.15V.

Does the MAX8211CTY support hysteresis, and how is it implemented?

Yes, the MAX8211CTY supports programmable hysteresis via its dedicated HYST pin - an open-drain p-channel output capable of sinking up to 10mA. Hysteresis is implemented by connecting HYST to the THRESH node through resistor R3, creating positive feedback that raises the trip threshold on recovery and lowers it on decay. This eliminates output chatter caused by noise or slow-rising/falling supply edges, and the MAX8211CTY achieves ±0.1mV HYST–THRESH disparity for tight control.

What is the operating temperature range and package type of the MAX8211CTY?

The MAX8211CTY is rated for 0°C to +70°C operation and is packaged in an 8-pin TO-99 metal can. In this package, the case is electrically connected to Pin 4 (GND), providing hermetic sealing, excellent thermal dissipation (533mW at +70°C), and EMI shielding - critical for stable analog monitoring in industrial environments where plastic or SO packages may suffer leakage or drift.

How does the MAX8211CTY differ from the MAX8212 variants?

The MAX8211CTY and MAX8212 differ fundamentally in output activation logic and current capability: the MAX8211CTY turns ON when THRESH voltage falls *below* 1.15V (undervoltage mode) and limits output sink current to 7mA; the MAX8212 turns ON when THRESH rises *above* 1.15V (overvoltage mode) and has no internal current limit. Both share the same 1.15V reference, HYST pin, and TO-99 package option, but their trip polarity and drive strength make them non-interchangeable without circuit redesign.

Can the MAX8211CTY replace the ICL8211 in existing designs?

Yes, the MAX8211CTY is explicitly designed as a plug-in replacement for the bipolar ICL8211 in TO-99 packages, sharing identical pinout, functional behavior, and supply voltage compatibility (<16.5V). It improves upon the ICL8211 with 5µA vs. ~100µA quiescent current, ±40mV vs. ±100mV threshold accuracy, and 10mA vs. 21µA hysteresis drive - delivering higher precision, lower power, and more robust noise immunity without requiring PCB changes.