Analog Devices Inc./Maxim Integrated MAX8215CSD+

Overview

MAX8215CSD+ from Maxim Integrated is a precision 5-channel voltage monitor IC for microprocessor power-supply supervision, integrating four dedicated comparators for +5V, −5V, +12V, and −12V monitoring plus one auxiliary comparator for programmable overvoltage/undervoltage detection. It features an internal 1.24V reference (±1% initial accuracy), built-in hysteresis, open-drain outputs, and consumes ≤250µA supply current across temperature. It is used in industrial controllers and portable instrumentation requiring reliable multi-rail fault detection.

For engineers reviewing the MAX8215CSD+ datasheet, MAX8215CSD+ pinout, MAX8215CSD+ application, or MAX8215CSD+ equivalent, key selection considerations include ±1.25% trip accuracy on +5V, ±1.5% on ±12V rails, 2.7V–11V supply range, 14-pin SO package compatibility, and open-drain output drive capability up to 2mA sink current.

Technical Context

The MAX8215CSD+ implements five independent comparators: four fixed-threshold channels for standard supply rails (+5V, −5V, +12V, −12V) and one auxiliary channel with externally accessible noninverting input (DIN) referenced to the internal 1.24V bandgap. All comparators use internal resistor networks to set thresholds and provide built-in hysteresis-eliminating external components for basic monitoring.

Its open-drain outputs (OUT1–OUT4, DOUT) require external pull-ups and support wire-OR configurations. The device operates down to 0.8V VDD, enabling self-monitoring of its own supply, and maintains stable reference regulation across −40°C to +85°C for the CSD variant.

Key Specifications

Pinout & Package

MAX8215CSD+ is housed in a 14-pin SO (Small Outline) package, 3.9mm × 8.7mm body, 1.27mm pitch, RoHS-compliant lead-free construction (denoted by '+' suffix). Pin 1 is marked via notch or bevel; pin numbering follows standard SO convention (counterclockwise from top-left corner).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX8216CSD+, the MAX8215CSD+ offers tighter +5V trip accuracy (±1.25% vs ±1.5%) and is the only option supporting ±12V rails. Compared with TLV809E33DBZR, MAX8215CSD+ delivers five independent comparators, negative rail supervision, and programmable auxiliary detection-enabling complete power-system visibility in a single 14-pin SO package.

Availability

MAX8215CSD+ is available at Aetrix Electronics and suitable for industrial controllers, portable instrumentation, and mobile radio designs requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MAX8215CSD+ 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 high-performance analog and mixed-signal semiconductor solutions for power management, sensing, and interface applications.

The MAX8215CSD+ belongs to Maxim's microprocessor supervisory IC product line, engineered specifically for reliable, multi-rail power supply monitoring in space-constrained industrial and portable systems.

FAQ

What is the operating temperature range for the MAX8215CSD+?

The MAX8215CSD+ is specified for commercial-grade operation from 0°C to +70°C. This range is validated per the device's ordering information and applies to all electrical characteristics in the datasheet unless otherwise noted. For extended temperature operation, consider the MAX8215ESD (−40°C to +85°C) or MAX8215MJD (−55°C to +125°C) variants. The MAX8215CSD+ maintains full performance-including ±1.25% +5V trip accuracy and ≤250µA supply current-across its rated range.

Can the MAX8215CSD+ monitor its own VDD supply?

Yes, the MAX8215CSD+ can monitor its own VDD supply using the +5V comparator and auxiliary comparator (DIN). Figure 4 in the datasheet shows a circuit where the +5V comparator detects undervoltage while the DIN comparator, configured with external resistors, detects overvoltage on the same VDD line. The device operates down to 0.8V VDD, ensuring reliable reset assertion even during deep brownout conditions. This self-monitoring capability eliminates the need for a separate supervisor IC in many compact designs.

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

The PGND (Power Ground) pin on the MAX8215CSD+ serves as the dedicated return path for VDD bypassing and isolates high-current switching noise from the analog ground (GND) plane. It must be connected directly to the VDD bypass capacitor (0.1µF) and tied to system ground at a single point to prevent ground loops. Separating PGND from GND improves reference stability and reduces false trips caused by supply bounce-especially critical in noisy industrial environments where the MAX8215CSD+ is commonly deployed.

How does the auxiliary comparator (DIN/DOUT) differ from the four dedicated comparators?

The auxiliary comparator (pins DIN and DOUT) differs fundamentally: its noninverting input is externally accessible, allowing user-programmable trip points via resistor dividers referenced to the internal 1.24V VREF, whereas the four dedicated comparators (+5V, −5V, +12V, −12V) have fixed internal thresholds. The auxiliary comparator also supports both overvoltage and undervoltage detection modes with built-in hysteresis, making it ideal for custom fault thresholds-such as monitoring a 3.3V rail or generating a programmable time-delayed reset-while the dedicated comparators provide guaranteed accuracy on standard supply voltages.

Are pull-up resistors required on all MAX8215CSD+ outputs?

Yes, all MAX8215CSD+ comparator outputs (OUT1–OUT4 and DOUT) are open-drain and require external pull-up resistors for proper logic-level operation. Pull-up values ≥100kΩ are recommended to minimize supply current, though values as low as 2.7kΩ are acceptable when higher drive strength is needed. Using excessively low pull-ups increases total current draw and may induce oscillation on the auxiliary comparator; the datasheet advises avoiding values below 2.7kΩ unless necessary for speed or drive capability in the specific MAX8215CSD+ application.