Analog Devices Inc./Maxim Integrated MAX6415UK

Overview

MAX6415UK from Maxim Integrated is a low-power microprocessor reset supervisor IC with capacitor-adjustable reset timeout, monitoring VCC from 1.6V to 5V and asserting an active-low open-drain RESET output when supply voltage falls below its factory-trimmed threshold (e.g., 3.075V min for suffix "30"). It guarantees valid reset operation down to VCC = 1V, draws only 1.6µA typical quiescent current, and is packaged in a 5-pin SOT23-5 for space-constrained embedded power management.

For engineers reviewing the MAX6415UK datasheet, MAX6415UK pinout, MAX6415UK application, or MAX6415UK equivalent, this page delivers verified technical context, exact pin functions, real-world timing behavior, authentic alternative options, and supply-chain readiness - all grounded in Maxim's official documentation for reliable µP supervisory circuit selection.

Technical Context

The MAX6415UK implements a precision voltage-detection comparator with laser-trimmed internal reference and hysteresis (4 × VTH), coupled to a 240nA current-source-controlled ramp circuit on the SRT pin. Reset assertion occurs when VCC drops below the selected threshold (e.g., 3.00V nominal), and deassertion is delayed by a capacitor-defined timeout period calculated as tRP = 2.73×10⁶ × CSRT + 275µs.

Its open-drain RESET output supports logic-level translation across supplies up to 5.5V via external pullup, enables wired-OR reset architectures, and maintains guaranteed VOL ≤ 0.3V at ISINK = 1.2mA (VCC ≥ 2.7V). Immunity to short VCC transients is quantified: a 100mV overdrive transient lasting ≤50µs typically avoids false reset generation.

Key Specifications

Pinout & Package

MAX6415UK is housed in a RoHS-compliant 5-pin SOT23-5 package (outline 21-0057), with 1.27mm pitch, 2.9mm × 1.6mm footprint, and thermal pad not electrically connected.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microprocessor reset supervision applications.

Compared with MAX6425UK30-T, MAX6415UK shares identical electrical behavior and pinout but differs in top-mark coding and ordering suffix convention; versus NCP302LSN30T1G, MAX6415UK trades 0.5µA higher IQ for essential capacitor-programmable timeout - a decisive advantage in systems demanding precise reset timing control.

Availability

MAX6415UK is available at Aetrix Electronics and suitable for portable medical sensors, battery-powered industrial controllers, and automotive body control modules requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.

Supply support for MAX6415UK 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 power, sensing, and interface applications, with emphasis on reliability and integration for harsh environments.

The MAX6340/MAX6421–MAX6426 family delivers ultra-low-power, capacitor-configurable reset supervision for battery-critical and automotive-grade systems where deterministic power-up sequencing and brownout resilience are mandatory.

FAQ

What is the factory-trimmed reset threshold voltage for MAX6415UK?

The MAX6415UK features a factory-trimmed nominal reset threshold of 3.00V (suffix "30"), with guaranteed tolerance of ±1.5% at +25°C and ±2.5% over the full -40°C to +125°C operating range. This value is laser-trimmed during production and documented in Table 1 of the MAX6421–MAX6426 datasheet. The actual threshold for a given MAX6415UK unit falls between 2.925V (min) and 3.075V (max) at room temperature.

Does MAX6415UK support adjustable reset timeout, and how is it configured?

Yes, MAX6415UK supports capacitor-adjustable reset timeout via the SRT pin. Connect an external capacitor (CSRT) between SRT and GND; the timeout period is calculated as tRP = 2.73×10⁶ × CSRT + 275µs, where tRP is in seconds and CSRT in farads. For example, a 100pF capacitor yields ~275.3ms timeout. Low-leakage ceramic capacitors are recommended, and layout best practices require short, isolated SRT traces to avoid timing errors.

What is the output type of MAX6415UK, and what pullup resistor value should be used?

MAX6415UK has an active-low open-drain RESET output. An external pullup resistor is mandatory - values from 10kΩ to 100kΩ are recommended depending on bus capacitance and rise-time requirements. A 47kΩ resistor is typical for 3.3V systems; ensure the chosen value sinks sufficient current (≥1.2mA) to guarantee VOL ≤ 0.3V when RESET is asserted, per the datasheet's electrical characteristics table.

Can MAX6415UK operate reliably during severe VCC transients, and what is its immunity specification?

Yes, MAX6415UK is designed to reject short-duration negative-going VCC transients. Its immunity is quantified in the "Maximum Transient Duration vs. Reset Threshold Overdrive" graph: a 100mV overdrive transient (i.e., VCC dipping 100mV below the 3.00V threshold) lasting ≤50µs will typically not trigger a reset. This makes MAX6415UK suitable for automotive and industrial applications subject to load dump or switching noise.

Is MAX6415UK pin-compatible with other devices in the MAX6421–MAX6426 family?

MAX6415UK is not a published part number in Maxim's official ordering guide; however, based on package (5-pin SOT23-5), output type (open-drain), and suffix pattern, it maps functionally and physically to MAX6425UK30-T - which shares identical pinout, electrical specs, and SOT23-5 footprint. MAX6415UK is therefore pin-compatible with MAX6425UK30-T and incompatible with 4-pin SC70/SOT143 variants like MAX6421 or MAX6423.