Analog Devices Inc./Maxim Integrated MAX8212CSA

Overview

The MAX8212CSA from Analog Devices is a CMOS micropower voltage detector designed to monitor supply rails and trigger microprocessor power-fail warnings. It features a 1.15V internal bandgap reference, open-drain n-channel output stage activated when THRESH > 1.15V, ±40mV threshold accuracy, 5µA quiescent current, and operates across 2.0V–16.5V supply range-used in battery-backup switching and undervoltage/overvoltage detection circuits.

For engineers reviewing the MAX8212CSA datasheet, MAX8212CSA pinout, MAX8212CSA application, or MAX8212CSA equivalent, this page delivers verified electrical parameters, SO-8 package mapping, real-world use cases for logic-supply monitoring and fault detection, and confirmed alternative parts with documented functional distinctions.

Technical Context

The MAX8212CSA implements a precision comparator architecture with a tightly controlled 1.15V bandgap reference and low-leakage MOSFET input at the THRESH pin (ITH ≤ 10nA typ). Its output stage is an open-drain n-channel transistor that sinks current only when THRESH exceeds the reference-enabling overvoltage detection without external inversion logic.

It includes a dedicated open-drain p-channel HYST output for programmable positive feedback, supporting noise-immune hysteresis implementation via external resistor networks. Unlike the current-limited MAX8211, the MAX8212 provides high-sink capability (35mA typ) but requires external current limiting in system design.

Key Specifications

Pinout & Package

MAX8212CSA is housed in an 8-pin SO (Small Outline) package (S8-2), surface-mount, RoHS-compliant, with standard 1.27mm pitch and 4.9mm × 6.0mm body size.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV809E33DBZR and MAX6326UT29D3+T, the MAX8212CSA uniquely supports user-defined trip points across 2V–16.5V, delivers high-current hysteresis feedback, and maintains compatibility with legacy ICL8212 designs-making it irreplaceable in programmable monitoring and dual-rail fault detection.

Availability

MAX8212CSA is available at Aetrix Electronics and suitable for microprocessor voltage monitoring, battery-backup switchover, and power-supply fault detection requiring stable component supply across commercial temperature grades.

Supply support for MAX8212CSA 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

Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.

The MAX8212CSA belongs to the MAX8211/MAX8212 family of programmable voltage monitors-designed specifically for reliable, low-power supply supervision in microprocessor-based systems where flexible trip-point configuration and noise-immune hysteresis are essential.

FAQ

What is the key functional difference between MAX8212CSA and MAX8211CSA?

The MAX8212CSA activates its open-drain output when the THRESH pin voltage exceeds the 1.15V internal reference-making it ideal for overvoltage detection. In contrast, the MAX8211CSA triggers when THRESH falls below 1.15V (undervoltage mode) and limits output sink current to 7mA. Both share identical pinout, package, and reference accuracy, but their threshold polarity and current capability differ fundamentally. The MAX8212CSA's 35mA typical sink current enables direct interface with higher-load peripherals without buffering.

Does MAX8212CSA require external components to set the detection threshold?

Yes, the MAX8212CSA requires two external resistors (R1 and R2) forming a voltage divider from the monitored rail to ground, with the THRESH pin connected to the divider midpoint. This allows precise programming of the trip voltage-for example, detecting 4.5V on a 5V rail by selecting R1 = 750kΩ and R2 = 2.2MΩ. No trimming or calibration is needed due to the ±40mV reference tolerance and ultra-low THRESH input leakage (≤10nA).

Can MAX8212CSA be used in a 24V system?

No, the MAX8212CSA has an absolute maximum supply voltage rating of 18V and a guaranteed operating range of 2.0V to 16.5V. Applying 24V exceeds both limits and risks permanent device damage. For 24V rail monitoring, a resistive divider must scale the input to ≤16.5V before connecting to V+, or a higher-voltage supervisor like the MAX6369 should be selected. The datasheet explicitly warns against exceeding 18V under any condition.

What is the purpose of the HYST pin on MAX8212CSA?

The HYST pin on MAX8212CSA is an open-drain p-channel output that supplies programmable positive feedback current to the THRESH node via an external resistor (R3), creating hysteresis to prevent output oscillation near the trip point. When enabled, it raises the effective turn-on threshold slightly above the base 1.15V reference-ensuring clean, chatter-free switching in noisy environments. It delivers up to 10mA and eliminates the need for external comparators or Schmitt triggers in robust fault-monitoring designs.

Is MAX8212CSA pin-compatible with the legacy ICL8212?

Yes, the MAX8212CSA is a plug-in replacement for the bipolar ICL8212 in applications where the supply voltage remains below 16.5V. It matches the same 8-pin SO package (S8-2), identical pinout (THRESH, HYST, V+, GND, OUT), and functional behavior-while offering superior performance: 5µA vs. ~100µA quiescent current, ±40mV vs. ±100mV threshold accuracy, and higher hysteresis output drive (10mA vs. 21µA). No PCB changes are required for drop-in upgrade.