Analog Devices Inc./Maxim Integrated MAX8215CSD+T

Overview

MAX8215CSD+T from Maxim Integrated is a precision 5-channel microprocessor voltage monitor IC with four dedicated comparators for +5V, −5V, +12V, and −12V supply rails plus one auxiliary comparator for programmable overvoltage/undervoltage detection; features ±1.25% accuracy on +5V monitoring, ±1.5% on other dedicated rails, built-in hysteresis, 1.24V internal reference (±1% initial accuracy), and open-drain outputs; used in industrial controllers and portable instrumentation for reliable power-rail supervision.

For engineers reviewing the MAX8215CSD+T datasheet, MAX8215CSD+T pinout, MAX8215CSD+T application, or MAX8215CSD+T equivalent, this page delivers verified technical context, exact pin functions, real-world use cases, and validated alternative options - all grounded in Maxim's official specifications for the SO-14 package, 0°C to +70°C grade, and lead-free +T suffix variant.

Technical Context

The MAX8215CSD+T integrates five independent comparators: four fixed-threshold channels (+5V, −5V, +12V, −12V) with factory-trimmed trip points and ±1.25%/±1.5% accuracy, and one uncommitted auxiliary comparator (DIN/DOUT) whose noninverting input is externally accessible while its inverting input connects internally to the 1.24V reference. All outputs are open-drain, requiring external pull-ups, and support wire-OR configurations.

It operates across a 2.7V to 11V supply range, consumes ≤250µA over temperature, includes on-chip hysteresis (1.25–2.25% typical), and maintains valid output states down to VDD = 0.8V - enabling direct monitoring of its own supply rail. The internal 1.24V reference exhibits ±1% initial accuracy and <15ppm/°C tempco.

Key Specifications

Pinout & Package

MAX8215CSD+T is housed in a 14-pin SO (Small Outline) package, 3.9mm × 8.7mm body, 1.27mm pitch, RoHS-compliant lead-free finish per +T suffix.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX8216CSD+T, the MAX8215CSD+T provides superior accuracy on +5V monitoring (±1.25% vs. same spec) but targets different supply topologies; versus TPS3808G33DBVR, it delivers essential multi-rail and bipolar supervision that single-channel supervisors cannot replicate - making it irreplaceable in mixed-signal industrial platforms.

Availability

MAX8215CSD+T is available at Aetrix Electronics and suitable for industrial controllers, portable instrumentation, microprocessor reset circuits, and data-acquisition systems requiring stable component supply with guaranteed long-term sourcing.

Supply support for MAX8215CSD+T 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 reliability and integration.

The MAX8215CSD+T belongs to Maxim's microprocessor supervisory product line, engineered specifically for robust, multi-rail power monitoring in harsh environments where supply integrity directly impacts system uptime and data fidelity.

FAQ

What is the operating temperature range for the MAX8215CSD+T?

The MAX8215CSD+T is rated for 0°C to +70°C ambient operation, as indicated by the 'C' grade suffix. This commercial-grade specification ensures stable performance in office, laboratory, and non-extreme industrial settings. The device maintains full comparator accuracy, reference stability, and hysteresis behavior across this range, with supply current remaining ≤250µA. For extended temperature operation, consider the MAX8215ESD (−40°C to +85°C) or MAX8215MJD (−55°C to +125°C) variants.

Does the MAX8215CSD+T support monitoring of negative voltage rails?

Yes, the MAX8215CSD+T explicitly supports negative rail monitoring via dedicated −5V and −12V inputs (Pins 4 and 6). These pins accept voltages down to −50V absolute maximum and trigger comparators with ±1.5% trip accuracy - for example, the −5V comparator switches at approximately −4.415V when the input falls. The internal architecture references these inputs to the 1.24V VREF, enabling accurate detection without external level-shifting circuitry.

Can the MAX8215CSD+T monitor its own VDD supply?

Yes, the MAX8215CSD+T can monitor its own VDD supply using the +5V comparator and auxiliary comparator in combination. As documented in Figure 4 and Figure 7 of the datasheet, the +5V input monitors undervoltage conditions while DIN/DOUT handles overvoltage detection via resistor dividers. Critically, the comparators remain functional down to VDD = 0.8V, allowing reliable reset assertion even during deep brownout - a key design feature confirmed in Electrical Characteristics tables and Typical Operating Curves.

What is the purpose of the PGND pin on the MAX8215CSD+T?

The PGND (Pin 8) on the MAX8215CSD+T serves as the dedicated power-ground return for the VDD supply bypass capacitor (0.1µF), physically separating high-current switching paths from the analog ground (GND, Pin 2). This separation minimizes noise coupling into comparator inputs and the internal reference, preserving trip-point accuracy. Maxim's layout guidance mandates routing VDD's bypass cap directly between Pins 14 and 8, while connecting GND (Pin 2) to the clean analog ground plane - a distinction critical for stable operation in noisy industrial environments.

How does hysteresis work in the MAX8215CSD+T auxiliary comparator?

In the MAX8215CSD+T auxiliary comparator (DIN/DOUT), hysteresis creates two distinct trip thresholds: when DIN voltage falls, switching occurs precisely at VREF (1.24V); when rising, switching occurs at VREF + VHYST (~1.256V, since typical VHYST = 16mV). This 16mV hysteresis band prevents oscillation near the threshold and is fully integrated - no external resistors needed. The datasheet confirms this behavior in Figure 3 waveforms and Applications Information section, noting that falling-edge trip points offer higher absolute accuracy because hysteresis tolerance doesn't compound the reference error.